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-rw-r--r--src/Android.mk20
-rw-r--r--src/boot.c463
-rw-r--r--src/boot.h31
-rw-r--r--src/check.c883
-rw-r--r--src/check.h40
-rw-r--r--src/common.c125
-rw-r--r--src/common.h57
-rw-r--r--src/dosfsck.c207
-rw-r--r--src/dosfsck.h220
-rw-r--r--src/dosfslabel.c126
-rw-r--r--src/fat.c381
-rw-r--r--src/fat.h81
-rw-r--r--src/file.c263
-rw-r--r--src/file.h72
-rw-r--r--src/io.c209
-rw-r--r--src/io.h71
-rw-r--r--src/lfn.c495
-rw-r--r--src/lfn.h36
-rw-r--r--src/mkdosfs.c1761
-rw-r--r--src/version.h28
20 files changed, 5569 insertions, 0 deletions
diff --git a/src/Android.mk b/src/Android.mk
new file mode 100644
index 0000000..a76a23a
--- /dev/null
+++ b/src/Android.mk
@@ -0,0 +1,20 @@
+ifneq ($(TARGET_SIMULATOR), true)
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := \
+ boot.c check.c common.c fat.c file.c io.c lfn.c dosfsck.c
+
+LOCAL_C_INCLUDES := external/dosfstools/src
+
+LOCAL_CFLAGS := -O2 -g -W -Wall -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
+
+LOCAL_MODULE := dosfsck
+LOCAL_MODULE_TAGS :=
+LOCAL_SYSTEM_SHARED_LIBRARIES := libc
+
+include $(BUILD_EXECUTABLE)
+
+endif
diff --git a/src/boot.c b/src/boot.c
new file mode 100644
index 0000000..7048b7f
--- /dev/null
+++ b/src/boot.c
@@ -0,0 +1,463 @@
+/* boot.c - Read and analyze ia PC/MS-DOS boot sector
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "io.h"
+#include "boot.h"
+
+
+#define ROUND_TO_MULTIPLE(n,m) ((n) && (m) ? (n)+(m)-1-((n)-1)%(m) : 0)
+ /* don't divide by zero */
+
+/* cut-over cluster counts for FAT12 and FAT16 */
+#define FAT12_THRESHOLD 4085
+#define FAT16_THRESHOLD 65525
+
+static struct {
+ __u8 media;
+ char *descr;
+} mediabytes[] = {
+ { 0xf0, "5.25\" or 3.5\" HD floppy" },
+ { 0xf8, "hard disk" },
+ { 0xf9, "3,5\" 720k floppy 2s/80tr/9sec or "
+ "5.25\" 1.2M floppy 2s/80tr/15sec" },
+ { 0xfa, "5.25\" 320k floppy 1s/80tr/8sec" },
+ { 0xfb, "3.5\" 640k floppy 2s/80tr/8sec" },
+ { 0xfc, "5.25\" 180k floppy 1s/40tr/9sec" },
+ { 0xfd, "5.25\" 360k floppy 2s/40tr/9sec" },
+ { 0xfe, "5.25\" 160k floppy 1s/40tr/8sec" },
+ { 0xff, "5.25\" 320k floppy 2s/40tr/8sec" },
+};
+
+#if defined __alpha || defined __ia64__ || defined __s390x__ || defined __x86_64__ || defined __ppc64__ || defined __arm__
+/* Unaligned fields must first be copied byte-wise */
+#define GET_UNALIGNED_W(f) \
+ ({ \
+ unsigned short __v; \
+ memcpy( &__v, &f, sizeof(__v) ); \
+ CF_LE_W( *(unsigned short *)&__v ); \
+ })
+#else
+#define GET_UNALIGNED_W(f) CF_LE_W( *(unsigned short *)&f )
+#endif
+
+void die_notfat(char *msg,...)
+{
+ va_list args;
+
+ va_start(args,msg);
+ vfprintf(stderr,msg,args);
+ va_end(args);
+ fprintf(stderr,"\n");
+ exit(8);
+}
+
+
+static char *get_media_descr( unsigned char media )
+{
+ unsigned int i;
+
+ for( i = 0; i < sizeof(mediabytes)/sizeof(*mediabytes); ++i ) {
+ if (mediabytes[i].media == media)
+ return( mediabytes[i].descr );
+ }
+ return( "undefined" );
+}
+
+static void dump_boot(DOS_FS *fs,struct boot_sector *b,unsigned lss)
+{
+ unsigned short sectors;
+
+ printf("Boot sector contents:\n");
+ if (!atari_format) {
+ char id[9];
+ strncpy(id,b->system_id,8);
+ id[8] = 0;
+ printf("System ID \"%s\"\n",id);
+ }
+ else {
+ /* On Atari, a 24 bit serial number is stored at offset 8 of the boot
+ * sector */
+ printf("Serial number 0x%x\n",
+ b->system_id[5] | (b->system_id[6]<<8) | (b->system_id[7]<<16));
+ }
+ printf("Media byte 0x%02x (%s)\n",b->media,get_media_descr(b->media));
+ printf("%10d bytes per logical sector\n",GET_UNALIGNED_W(b->sector_size));
+ printf("%10d bytes per cluster\n",fs->cluster_size);
+ printf("%10d reserved sector%s\n",CF_LE_W(b->reserved),
+ CF_LE_W(b->reserved) == 1 ? "" : "s");
+ printf("First FAT starts at byte %llu (sector %llu)\n",
+ (unsigned long long)fs->fat_start,
+ (unsigned long long)fs->fat_start/lss);
+ printf("%10d FATs, %d bit entries\n",b->fats,fs->fat_bits);
+ printf("%10d bytes per FAT (= %u sectors)\n",fs->fat_size,
+ fs->fat_size/lss);
+ if (!fs->root_cluster) {
+ printf("Root directory starts at byte %llu (sector %llu)\n",
+ (unsigned long long)fs->root_start,
+ (unsigned long long)fs->root_start/lss);
+ printf("%10d root directory entries\n",fs->root_entries);
+ }
+ else {
+ printf( "Root directory start at cluster %lu (arbitrary size)\n",
+ fs->root_cluster);
+ }
+ printf("Data area starts at byte %llu (sector %llu)\n",
+ (unsigned long long)fs->data_start,
+ (unsigned long long)fs->data_start/lss);
+ printf("%10lu data clusters (%llu bytes)\n",fs->clusters,
+ (unsigned long long)fs->clusters*fs->cluster_size);
+ printf("%u sectors/track, %u heads\n",CF_LE_W(b->secs_track),
+ CF_LE_W(b->heads));
+ printf("%10u hidden sectors\n",
+ atari_format ?
+ /* On Atari, the hidden field is only 16 bit wide and unused */
+ (((unsigned char *)&b->hidden)[0] |
+ ((unsigned char *)&b->hidden)[1] << 8) :
+ CF_LE_L(b->hidden));
+ sectors = GET_UNALIGNED_W( b->sectors );
+ printf("%10u sectors total\n", sectors ? sectors : CF_LE_L(b->total_sect));
+}
+
+static void check_backup_boot(DOS_FS *fs, struct boot_sector *b, int lss)
+{
+ struct boot_sector b2;
+
+ if (!fs->backupboot_start) {
+ printf( "There is no backup boot sector.\n" );
+ if (CF_LE_W(b->reserved) < 3) {
+ printf( "And there is no space for creating one!\n" );
+ return;
+ }
+ if (interactive)
+ printf( "1) Create one\n2) Do without a backup\n" );
+ else printf( " Auto-creating backup boot block.\n" );
+ if (!interactive || get_key("12","?") == '1') {
+ int bbs;
+ /* The usual place for the backup boot sector is sector 6. Choose
+ * that or the last reserved sector. */
+ if (CF_LE_W(b->reserved) >= 7 && CF_LE_W(b->info_sector) != 6)
+ bbs = 6;
+ else {
+ bbs = CF_LE_W(b->reserved) - 1;
+ if (bbs == CF_LE_W(b->info_sector))
+ --bbs; /* this is never 0, as we checked reserved >= 3! */
+ }
+ fs->backupboot_start = bbs*lss;
+ b->backup_boot = CT_LE_W(bbs);
+ fs_write(fs->backupboot_start,sizeof(*b),b);
+ fs_write((loff_t)offsetof(struct boot_sector,backup_boot),
+ sizeof(b->backup_boot),&b->backup_boot);
+ printf( "Created backup of boot sector in sector %d\n", bbs );
+ return;
+ }
+ else return;
+ }
+
+ fs_read(fs->backupboot_start,sizeof(b2),&b2);
+ if (memcmp(b,&b2,sizeof(b2)) != 0) {
+ /* there are any differences */
+ __u8 *p, *q;
+ int i, pos, first = 1;
+ char buf[20];
+
+ printf( "There are differences between boot sector and its backup.\n" );
+ printf( "Differences: (offset:original/backup)\n " );
+ pos = 2;
+ for( p = (__u8 *)b, q = (__u8 *)&b2, i = 0; i < sizeof(b2);
+ ++p, ++q, ++i ) {
+ if (*p != *q) {
+ sprintf( buf, "%s%u:%02x/%02x", first ? "" : ", ",
+ (unsigned)(p-(__u8 *)b), *p, *q );
+ if (pos + strlen(buf) > 78) printf( "\n " ), pos = 2;
+ printf( "%s", buf );
+ pos += strlen(buf);
+ first = 0;
+ }
+ }
+ printf( "\n" );
+
+ if (interactive)
+ printf( "1) Copy original to backup\n"
+ "2) Copy backup to original\n"
+ "3) No action\n" );
+ else printf( " Not automatically fixing this.\n" );
+ switch (interactive ? get_key("123","?") : '3') {
+ case '1':
+ fs_write(fs->backupboot_start,sizeof(*b),b);
+ break;
+ case '2':
+ fs_write(0,sizeof(b2),&b2);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+static void init_fsinfo(struct info_sector *i)
+{
+ i->magic = CT_LE_L(0x41615252);
+ i->signature = CT_LE_L(0x61417272);
+ i->free_clusters = CT_LE_L(-1);
+ i->next_cluster = CT_LE_L(2);
+ i->boot_sign = CT_LE_W(0xaa55);
+}
+
+static void read_fsinfo(DOS_FS *fs, struct boot_sector *b,int lss)
+{
+ struct info_sector i;
+
+ if (!b->info_sector) {
+ printf( "No FSINFO sector\n" );
+ if (interactive)
+ printf( "1) Create one\n2) Do without FSINFO\n" );
+ else printf( " Not automatically creating it.\n" );
+ if (interactive && get_key("12","?") == '1') {
+ /* search for a free reserved sector (not boot sector and not
+ * backup boot sector) */
+ __u32 s;
+ for( s = 1; s < CF_LE_W(b->reserved); ++s )
+ if (s != CF_LE_W(b->backup_boot)) break;
+ if (s > 0 && s < CF_LE_W(b->reserved)) {
+ init_fsinfo(&i);
+ fs_write((loff_t)s*lss,sizeof(i),&i);
+ b->info_sector = CT_LE_W(s);
+ fs_write((loff_t)offsetof(struct boot_sector,info_sector),
+ sizeof(b->info_sector),&b->info_sector);
+ if (fs->backupboot_start)
+ fs_write(fs->backupboot_start+
+ offsetof(struct boot_sector,info_sector),
+ sizeof(b->info_sector),&b->info_sector);
+ }
+ else {
+ printf( "No free reserved sector found -- "
+ "no space for FSINFO sector!\n" );
+ return;
+ }
+ }
+ else return;
+ }
+
+ fs->fsinfo_start = CF_LE_W(b->info_sector)*lss;
+ fs_read(fs->fsinfo_start,sizeof(i),&i);
+
+ if (i.magic != CT_LE_L(0x41615252) ||
+ i.signature != CT_LE_L(0x61417272) ||
+ i.boot_sign != CT_LE_W(0xaa55)) {
+ printf( "FSINFO sector has bad magic number(s):\n" );
+ if (i.magic != CT_LE_L(0x41615252))
+ printf( " Offset %llu: 0x%08x != expected 0x%08x\n",
+ (unsigned long long)offsetof(struct info_sector,magic),
+ CF_LE_L(i.magic),0x41615252);
+ if (i.signature != CT_LE_L(0x61417272))
+ printf( " Offset %llu: 0x%08x != expected 0x%08x\n",
+ (unsigned long long)offsetof(struct info_sector,signature),
+ CF_LE_L(i.signature),0x61417272);
+ if (i.boot_sign != CT_LE_W(0xaa55))
+ printf( " Offset %llu: 0x%04x != expected 0x%04x\n",
+ (unsigned long long)offsetof(struct info_sector,boot_sign),
+ CF_LE_W(i.boot_sign),0xaa55);
+ if (interactive)
+ printf( "1) Correct\n2) Don't correct (FSINFO invalid then)\n" );
+ else printf( " Auto-correcting it.\n" );
+ if (!interactive || get_key("12","?") == '1') {
+ init_fsinfo(&i);
+ fs_write(fs->fsinfo_start,sizeof(i),&i);
+ }
+ else fs->fsinfo_start = 0;
+ }
+
+ if (fs->fsinfo_start)
+ fs->free_clusters = CF_LE_L(i.free_clusters);
+}
+
+void read_boot(DOS_FS *fs)
+{
+ struct boot_sector b;
+ unsigned total_sectors;
+ unsigned short logical_sector_size, sectors;
+ unsigned fat_length;
+ loff_t data_size;
+
+ fs_read(0,sizeof(b),&b);
+ logical_sector_size = GET_UNALIGNED_W(b.sector_size);
+ if (!logical_sector_size) die_notfat("Logical sector size is zero.");
+ fs->cluster_size = b.cluster_size*logical_sector_size;
+ if (!fs->cluster_size) die_notfat("Cluster size is zero.");
+ if (b.fats != 2 && b.fats != 1)
+ die("Currently, only 1 or 2 FATs are supported, not %d.\n",b.fats);
+ fs->nfats = b.fats;
+ sectors = GET_UNALIGNED_W(b.sectors);
+ total_sectors = sectors ? sectors : CF_LE_L(b.total_sect);
+
+ if (verbose) printf("Checking we can access the last sector of the filesystem\n");
+ /* Can't access last odd sector anyway, so round down */
+ fs_test((loff_t)((total_sectors & ~1)-1)*(loff_t)logical_sector_size,
+ logical_sector_size);
+ fat_length = CF_LE_W(b.fat_length) ?
+ CF_LE_W(b.fat_length) : CF_LE_L(b.fat32_length);
+ fs->fat_start = (loff_t)CF_LE_W(b.reserved)*logical_sector_size;
+ fs->root_start = ((loff_t)CF_LE_W(b.reserved)+b.fats*fat_length)*
+ logical_sector_size;
+ fs->root_entries = GET_UNALIGNED_W(b.dir_entries);
+ fs->data_start = fs->root_start+ROUND_TO_MULTIPLE(fs->root_entries <<
+ MSDOS_DIR_BITS,logical_sector_size);
+ data_size = (loff_t)total_sectors*logical_sector_size-fs->data_start;
+ fs->clusters = data_size/fs->cluster_size;
+ fs->root_cluster = 0; /* indicates standard, pre-FAT32 root dir */
+ fs->fsinfo_start = 0; /* no FSINFO structure */
+ fs->free_clusters = -1; /* unknown */
+ if (!b.fat_length && b.fat32_length) {
+ fs->fat_bits = 32;
+ fs->root_cluster = CF_LE_L(b.root_cluster);
+ if (!fs->root_cluster && fs->root_entries)
+ /* M$ hasn't specified this, but it looks reasonable: If
+ * root_cluster is 0 but there is a separate root dir
+ * (root_entries != 0), we handle the root dir the old way. Give a
+ * warning, but convertig to a root dir in a cluster chain seems
+ * to complex for now... */
+ printf( "Warning: FAT32 root dir not in cluster chain! "
+ "Compability mode...\n" );
+ else if (!fs->root_cluster && !fs->root_entries)
+ die_notfat("No root directory!");
+ else if (fs->root_cluster && fs->root_entries)
+ printf( "Warning: FAT32 root dir is in a cluster chain, but "
+ "a separate root dir\n"
+ " area is defined. Cannot fix this easily.\n" );
+ if (fs->clusters < FAT16_THRESHOLD)
+ printf("Warning: Filesystem is FAT32 according to fat_length "
+ "and fat32_length fields,\n"
+ " but has only %lu clusters, less than the required "
+ "minimum of %d.\n"
+ " This may lead to problems on some systems.\n",
+ fs->clusters, FAT16_THRESHOLD);
+
+ fs->backupboot_start = CF_LE_W(b.backup_boot)*logical_sector_size;
+ check_backup_boot(fs,&b,logical_sector_size);
+
+ read_fsinfo(fs,&b,logical_sector_size);
+ }
+ else if (!atari_format) {
+ /* On real MS-DOS, a 16 bit FAT is used whenever there would be too
+ * much clusers otherwise. */
+ fs->fat_bits = (fs->clusters >= FAT12_THRESHOLD) ? 16 : 12;
+ if (fs->clusters >= FAT16_THRESHOLD)
+ die("Too many clusters (%lu) for FAT16 filesystem.",
+ fs->clusters);
+ }
+ else {
+ /* On Atari, things are more difficult: GEMDOS always uses 12bit FATs
+ * on floppies, and always 16 bit on harddisks. */
+ fs->fat_bits = 16; /* assume 16 bit FAT for now */
+ /* If more clusters than fat entries in 16-bit fat, we assume
+ * it's a real MSDOS FS with 12-bit fat. */
+ if (fs->clusters+2 > fat_length*logical_sector_size*8/16 ||
+ /* if it's a floppy disk --> 12bit fat */
+ device_no == 2 ||
+ /* if it's a ramdisk or loopback device and has one of the usual
+ * floppy sizes -> 12bit FAT */
+ ((device_no == 1 || device_no == 7) &&
+ (total_sectors == 720 || total_sectors == 1440 ||
+ total_sectors == 2880)))
+ fs->fat_bits = 12;
+ }
+ /* On FAT32, the high 4 bits of a FAT entry are reserved */
+ fs->eff_fat_bits = (fs->fat_bits == 32) ? 28 : fs->fat_bits;
+ fs->fat_size = fat_length*logical_sector_size;
+
+ fs->label = calloc(12, sizeof (__u8));
+ if (fs->fat_bits == 12 || fs->fat_bits == 16) {
+ struct boot_sector_16 *b16 = (struct boot_sector_16 *)&b;
+ if (b16->extended_sig == 0x29)
+ memmove(fs->label, b16->label, 11);
+ else
+ fs->label = NULL;
+ } else if (fs->fat_bits == 32) {
+ if (b.extended_sig == 0x29)
+ memmove(fs->label, &b.label, 11);
+ else
+ fs->label = NULL;
+ }
+
+ if (fs->clusters > ((unsigned long long)fs->fat_size*8/fs->fat_bits)-2)
+ die("File system has %d clusters but only space for %d FAT entries.",
+ fs->clusters,((unsigned long long)fs->fat_size*8/fs->fat_bits)-2);
+ if (!fs->root_entries && !fs->root_cluster)
+ die("Root directory has zero size.");
+ if (fs->root_entries & (MSDOS_DPS-1))
+ die("Root directory (%d entries) doesn't span an integral number of "
+ "sectors.",fs->root_entries);
+ if (logical_sector_size & (SECTOR_SIZE-1))
+ die("Logical sector size (%d bytes) is not a multiple of the physical "
+ "sector size.",logical_sector_size);
+#if 0 /* linux kernel doesn't check that either */
+ /* ++roman: On Atari, these two fields are often left uninitialized */
+ if (!atari_format && (!b.secs_track || !b.heads))
+ die("Invalid disk format in boot sector.");
+#endif
+ if (verbose) dump_boot(fs,&b,logical_sector_size);
+}
+
+void write_label(DOS_FS *fs, char *label)
+{
+ struct boot_sector b;
+ struct boot_sector_16 *b16 = (struct boot_sector_16 *)&b;
+ int l = strlen(label);
+
+ while (l < 11)
+ label[l++] = ' ';
+
+ fs_read(0, sizeof(b), &b);
+ if (fs->fat_bits == 12 || fs->fat_bits == 16) {
+ if (b16->extended_sig != 0x29) {
+ b16->extended_sig = 0x29;
+ b16->serial = 0;
+ memmove(b16->fs_type, fs->fat_bits == 12 ?"FAT12 ":"FAT16 ", 8);
+ }
+ memmove(b16->label, label, 11);
+ } else if (fs->fat_bits == 32) {
+ if (b.extended_sig != 0x29) {
+ b.extended_sig = 0x29;
+ b.serial = 0;
+ memmove(b.fs_type, "FAT32 ", 8);
+ }
+ memmove(b.label, label, 11);
+ }
+ fs_write(0, sizeof(b), &b);
+ if (fs->fat_bits == 32 && fs->backupboot_start)
+ fs_write(fs->backupboot_start, sizeof(b), &b);
+}
+
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
diff --git a/src/boot.h b/src/boot.h
new file mode 100644
index 0000000..eedf2b0
--- /dev/null
+++ b/src/boot.h
@@ -0,0 +1,31 @@
+/* boot.h - Read and analyze ia PC/MS-DOS boot sector
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+
+#ifndef _BOOT_H
+#define _BOOT_H
+
+void read_boot(DOS_FS *fs);
+void write_label(DOS_FS *fs, char *label);
+
+/* Reads the boot sector from the currently open device and initializes *FS */
+
+#endif
diff --git a/src/check.c b/src/check.c
new file mode 100644
index 0000000..870fcd9
--- /dev/null
+++ b/src/check.c
@@ -0,0 +1,883 @@
+/* check.c - Check and repair a PC/MS-DOS file system
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <time.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "io.h"
+#include "fat.h"
+#include "file.h"
+#include "lfn.h"
+#include "check.h"
+
+
+static DOS_FILE *root;
+
+/* get start field of a dir entry */
+#define FSTART(p,fs) \
+ ((unsigned long)CF_LE_W(p->dir_ent.start) | \
+ (fs->fat_bits == 32 ? CF_LE_W(p->dir_ent.starthi) << 16 : 0))
+
+#define MODIFY(p,i,v) \
+ do { \
+ if (p->offset) { \
+ p->dir_ent.i = v; \
+ fs_write(p->offset+offsetof(DIR_ENT,i), \
+ sizeof(p->dir_ent.i),&p->dir_ent.i); \
+ } \
+ } while(0)
+
+#define MODIFY_START(p,v,fs) \
+ do { \
+ unsigned long __v = (v); \
+ if (!p->offset) { \
+ /* writing to fake entry for FAT32 root dir */ \
+ if (!__v) die("Oops, deleting FAT32 root dir!"); \
+ fs->root_cluster = __v; \
+ p->dir_ent.start = CT_LE_W(__v&0xffff); \
+ p->dir_ent.starthi = CT_LE_W(__v>>16); \
+ __v = CT_LE_L(__v); \
+ fs_write((loff_t)offsetof(struct boot_sector,root_cluster), \
+ sizeof(((struct boot_sector *)0)->root_cluster), \
+ &__v); \
+ } \
+ else { \
+ MODIFY(p,start,CT_LE_W((__v)&0xffff)); \
+ if (fs->fat_bits == 32) \
+ MODIFY(p,starthi,CT_LE_W((__v)>>16)); \
+ } \
+ } while(0)
+
+
+loff_t alloc_rootdir_entry(DOS_FS *fs, DIR_ENT *de, const char *pattern)
+{
+ static int curr_num = 0;
+ loff_t offset;
+
+ if (fs->root_cluster) {
+ DIR_ENT d2;
+ int i = 0, got = 0;
+ unsigned long clu_num, prev = 0;
+ loff_t offset2;
+
+ clu_num = fs->root_cluster;
+ offset = cluster_start(fs,clu_num);
+ while (clu_num > 0 && clu_num != -1) {
+ fs_read(offset,sizeof(DIR_ENT),&d2);
+ if (IS_FREE(d2.name) && d2.attr != VFAT_LN_ATTR) {
+ got = 1;
+ break;
+ }
+ i += sizeof(DIR_ENT);
+ offset += sizeof(DIR_ENT);
+ if ((i % fs->cluster_size) == 0) {
+ prev = clu_num;
+ if ((clu_num = next_cluster(fs,clu_num)) == 0 || clu_num == -1)
+ break;
+ offset = cluster_start(fs,clu_num);
+ }
+ }
+ if (!got) {
+ /* no free slot, need to extend root dir: alloc next free cluster
+ * after previous one */
+ if (!prev)
+ die("Root directory has no cluster allocated!");
+ for (clu_num = prev+1; clu_num != prev; clu_num++) {
+ if (clu_num >= fs->clusters+2) clu_num = 2;
+ if (!fs->fat[clu_num].value)
+ break;
+ }
+ if (clu_num == prev)
+ die("Root directory full and no free cluster");
+ set_fat(fs,prev,clu_num);
+ set_fat(fs,clu_num,-1);
+ set_owner(fs, clu_num, get_owner(fs, fs->root_cluster));
+ /* clear new cluster */
+ memset( &d2, 0, sizeof(d2) );
+ offset = cluster_start(fs,clu_num);
+ for( i = 0; i < fs->cluster_size; i += sizeof(DIR_ENT) )
+ fs_write( offset+i, sizeof(d2), &d2 );
+ }
+ memset(de,0,sizeof(DIR_ENT));
+ while (1) {
+ sprintf(de->name,pattern,curr_num);
+ clu_num = fs->root_cluster;
+ i = 0;
+ offset2 = cluster_start(fs,clu_num);
+ while (clu_num > 0 && clu_num != -1) {
+ fs_read(offset2,sizeof(DIR_ENT),&d2);
+ if (offset2 != offset &&
+ !strncmp(d2.name,de->name,MSDOS_NAME))
+ break;
+ i += sizeof(DIR_ENT);
+ offset2 += sizeof(DIR_ENT);
+ if ((i % fs->cluster_size) == 0) {
+ if ((clu_num = next_cluster(fs,clu_num)) == 0 ||
+ clu_num == -1)
+ break;
+ offset2 = cluster_start(fs,clu_num);
+ }
+ }
+ if (clu_num == 0 || clu_num == -1)
+ break;
+ if (++curr_num >= 10000) die("Unable to create unique name");
+ }
+ }
+ else {
+ DIR_ENT *root;
+ int next_free = 0, scan;
+
+ root = alloc(fs->root_entries*sizeof(DIR_ENT));
+ fs_read(fs->root_start,fs->root_entries*sizeof(DIR_ENT),root);
+
+ while (next_free < fs->root_entries)
+ if (IS_FREE(root[next_free].name) &&
+ root[next_free].attr != VFAT_LN_ATTR)
+ break;
+ else next_free++;
+ if (next_free == fs->root_entries)
+ die("Root directory is full.");
+ offset = fs->root_start+next_free*sizeof(DIR_ENT);
+ memset(de,0,sizeof(DIR_ENT));
+ while (1) {
+ sprintf(de->name,pattern,curr_num);
+ for (scan = 0; scan < fs->root_entries; scan++)
+ if (scan != next_free &&
+ !strncmp(root[scan].name,de->name,MSDOS_NAME))
+ break;
+ if (scan == fs->root_entries) break;
+ if (++curr_num >= 10000) die("Unable to create unique name");
+ }
+ free(root);
+ }
+ ++n_files;
+ return offset;
+}
+
+
+static char *path_name(DOS_FILE *file)
+{
+ static char path[PATH_MAX*2];
+
+ if (!file) *path = 0;
+ else {
+ if (strlen(path_name(file->parent)) > PATH_MAX)
+ die("Path name too long.");
+ if (strcmp(path,"/") != 0) strcat(path,"/");
+ strcpy(strrchr(path,0),file->lfn?file->lfn:file_name(file->dir_ent.name));
+ }
+ return path;
+}
+
+
+static int day_n[] = { 0,31,59,90,120,151,181,212,243,273,304,334,0,0,0,0 };
+ /* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */
+
+
+/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
+
+time_t date_dos2unix(unsigned short time,unsigned short date)
+{
+ int month,year;
+ time_t secs;
+
+ month = ((date >> 5) & 15)-1;
+ year = date >> 9;
+ secs = (time & 31)*2+60*((time >> 5) & 63)+(time >> 11)*3600+86400*
+ ((date & 31)-1+day_n[month]+(year/4)+year*365-((year & 3) == 0 &&
+ month < 2 ? 1 : 0)+3653);
+ /* days since 1.1.70 plus 80's leap day */
+ return secs;
+}
+
+
+static char *file_stat(DOS_FILE *file)
+{
+ static char temp[100];
+ struct tm *tm;
+ char tmp[100];
+ time_t date;
+
+ date = date_dos2unix(CF_LE_W(file->dir_ent.time),CF_LE_W(file->
+ dir_ent.date));
+ tm = localtime(&date);
+ strftime(tmp,99,"%H:%M:%S %b %d %Y",tm);
+ sprintf(temp," Size %u bytes, date %s",CF_LE_L(file->dir_ent.size),tmp);
+ return temp;
+}
+
+
+static int bad_name(unsigned char *name)
+{
+ int i, spc, suspicious = 0;
+ char *bad_chars = atari_format ? "*?\\/:" : "*?<>|\"\\/:";
+
+ /* Do not complain about (and auto-correct) the extended attribute files
+ * of OS/2. */
+ if (strncmp(name,"EA DATA SF",11) == 0 ||
+ strncmp(name,"WP ROOT SF",11) == 0) return 0;
+
+ for (i = 0; i < 8; i++) {
+ if (name[i] < ' ' || name[i] == 0x7f) return 1;
+ if (name[i] > 0x7f) ++suspicious;
+ if (strchr(bad_chars,name[i])) return 1;
+ }
+
+ for (i = 8; i < 11; i++) {
+ if (name[i] < ' ' || name[i] == 0x7f) return 1;
+ if (name[i] > 0x7f) ++suspicious;
+ if (strchr(bad_chars,name[i])) return 1;
+ }
+
+ spc = 0;
+ for (i = 0; i < 8; i++) {
+ if (name[i] == ' ')
+ spc = 1;
+ else if (spc)
+ /* non-space after a space not allowed, space terminates the name
+ * part */
+ return 1;
+ }
+
+ spc = 0;
+ for (i = 8; i < 11; i++) {
+ if (name[i] == ' ')
+ spc = 1;
+ else if (spc)
+ /* non-space after a space not allowed, space terminates the name
+ * part */
+ return 1;
+ }
+
+ /* Under GEMDOS, chars >= 128 are never allowed. */
+ if (atari_format && suspicious)
+ return 1;
+
+ /* Only complain about too much suspicious chars in interactive mode,
+ * never correct them automatically. The chars are all basically ok, so we
+ * shouldn't auto-correct such names. */
+ if (interactive && suspicious > 6)
+ return 1;
+ return 0;
+}
+
+
+static void drop_file(DOS_FS *fs,DOS_FILE *file)
+{
+ unsigned long cluster;
+
+ MODIFY(file,name[0],DELETED_FLAG);
+ for (cluster = FSTART(file,fs); cluster > 0 && cluster <
+ fs->clusters+2; cluster = next_cluster(fs,cluster))
+ set_owner(fs,cluster,NULL);
+ --n_files;
+}
+
+
+static void truncate_file(DOS_FS *fs,DOS_FILE *file,unsigned long clusters)
+{
+ int deleting;
+ unsigned long walk,next,prev;
+
+ walk = FSTART(file,fs);
+ prev = 0;
+ if ((deleting = !clusters)) MODIFY_START(file,0,fs);
+ while (walk > 0 && walk != -1) {
+ next = next_cluster(fs,walk);
+ if (deleting) set_fat(fs,walk,0);
+ else if ((deleting = !--clusters)) set_fat(fs,walk,-1);
+ prev = walk;
+ walk = next;
+ }
+}
+
+
+static void auto_rename(DOS_FILE *file)
+{
+ DOS_FILE *first,*walk;
+ unsigned long int number;
+
+ if (!file->offset) return; /* cannot rename FAT32 root dir */
+ first = file->parent ? file->parent->first : root;
+ number = 0;
+ while (1) {
+ sprintf(file->dir_ent.name, "FSCK%04d", number / 1000);
+ sprintf(file->dir_ent.name, "%03d", number % 1000);
+ for (walk = first; walk; walk = walk->next)
+ if (walk != file && !strncmp(walk->dir_ent.name,file->dir_ent.
+ name,MSDOS_NAME)) break;
+ if (!walk) {
+ fs_write(file->offset,MSDOS_NAME,file->dir_ent.name);
+ return;
+ }
+ number++;
+ if (number > 9999999) {
+ die("Too many files need repair.");
+ }
+ }
+ die("Can't generate a unique name.");
+}
+
+
+static void rename_file(DOS_FILE *file)
+{
+ unsigned char name[46];
+ unsigned char *walk,*here;
+
+ if (!file->offset) {
+ printf( "Cannot rename FAT32 root dir\n" );
+ return; /* cannot rename FAT32 root dir */
+ }
+ while (1) {
+ printf("New name: ");
+ fflush(stdout);
+ if (fgets(name,45,stdin)) {
+ if ((here = strchr(name,'\n'))) *here = 0;
+ for (walk = strrchr(name,0); walk >= name && (*walk == ' ' ||
+ *walk == '\t'); walk--);
+ walk[1] = 0;
+ for (walk = name; *walk == ' ' || *walk == '\t'; walk++);
+ if (file_cvt(walk,file->dir_ent.name)) {
+ fs_write(file->offset,MSDOS_NAME,file->dir_ent.name);
+ return;
+ }
+ }
+ }
+}
+
+
+static int handle_dot(DOS_FS *fs,DOS_FILE *file,int dots)
+{
+ char *name;
+
+ name = strncmp(file->dir_ent.name,MSDOS_DOT,MSDOS_NAME) ? ".." : ".";
+ if (!(file->dir_ent.attr & ATTR_DIR)) {
+ printf("%s\n Is a non-directory.\n",path_name(file));
+ if (interactive)
+ printf("1) Drop it\n2) Auto-rename\n3) Rename\n"
+ "4) Convert to directory\n");
+ else printf(" Auto-renaming it.\n");
+ switch (interactive ? get_key("1234","?") : '2') {
+ case '1':
+ drop_file(fs,file);
+ return 1;
+ case '2':
+ auto_rename(file);
+ printf(" Renamed to %s\n",file_name(file->dir_ent.name));
+ return 0;
+ case '3':
+ rename_file(file);
+ return 0;
+ case '4':
+ MODIFY(file,size,CT_LE_L(0));
+ MODIFY(file,attr,file->dir_ent.attr | ATTR_DIR);
+ break;
+ }
+ }
+ if (!dots) {
+ printf("Root contains directory \"%s\". Dropping it.\n",name);
+ drop_file(fs,file);
+ return 1;
+ }
+ return 0;
+}
+
+
+static int check_file(DOS_FS *fs,DOS_FILE *file)
+{
+ DOS_FILE *owner;
+ int restart;
+ unsigned long expect,curr,this,clusters,prev,walk,clusters2;
+
+ if (file->dir_ent.attr & ATTR_DIR) {
+ if (CF_LE_L(file->dir_ent.size)) {
+ printf("%s\n Directory has non-zero size. Fixing it.\n",
+ path_name(file));
+ MODIFY(file,size,CT_LE_L(0));
+ }
+ if (file->parent && !strncmp(file->dir_ent.name,MSDOS_DOT,MSDOS_NAME)) {
+ expect = FSTART(file->parent,fs);
+ if (FSTART(file,fs) != expect) {
+ printf("%s\n Start (%ld) does not point to parent (%ld)\n",
+ path_name(file),FSTART(file,fs),expect);
+ MODIFY_START(file,expect,fs);
+ }
+ return 0;
+ }
+ if (file->parent && !strncmp(file->dir_ent.name,MSDOS_DOTDOT,
+ MSDOS_NAME)) {
+ expect = file->parent->parent ? FSTART(file->parent->parent,fs):0;
+ if (fs->root_cluster && expect == fs->root_cluster)
+ expect = 0;
+ if (FSTART(file,fs) != expect) {
+ printf("%s\n Start (%lu) does not point to .. (%lu)\n",
+ path_name(file),FSTART(file,fs),expect);
+ MODIFY_START(file,expect,fs);
+ }
+ return 0;
+ }
+ if (FSTART(file,fs)==0){
+ printf ("%s\n Start does point to root directory. Deleting dir. \n",
+ path_name(file));
+ MODIFY(file,name[0],DELETED_FLAG);
+ return 0;
+ }
+ }
+ if (FSTART(file,fs) >= fs->clusters+2) {
+ printf("%s\n Start cluster beyond limit (%lu > %lu). Truncating file.\n",
+ path_name(file),FSTART(file,fs),fs->clusters+1);
+ if (!file->offset)
+ die( "Bad FAT32 root directory! (bad start cluster)\n" );
+ MODIFY_START(file,0,fs);
+ }
+ clusters = prev = 0;
+ for (curr = FSTART(file,fs) ? FSTART(file,fs) :
+ -1; curr != -1; curr = next_cluster(fs,curr)) {
+ if (!fs->fat[curr].value || bad_cluster(fs,curr)) {
+ printf("%s\n Contains a %s cluster (%lu). Assuming EOF.\n",
+ path_name(file),fs->fat[curr].value ? "bad" : "free",curr);
+ if (prev) set_fat(fs,prev,-1);
+ else if (!file->offset)
+ die( "FAT32 root dir starts with a bad cluster!" );
+ else MODIFY_START(file,0,fs);
+ break;
+ }
+ if (!(file->dir_ent.attr & ATTR_DIR) && CF_LE_L(file->dir_ent.size) <=
+ (unsigned long long)clusters*fs->cluster_size) {
+ printf("%s\n File size is %u bytes, cluster chain length is > %llu "
+ "bytes.\n Truncating file to %u bytes.\n",path_name(file),
+ CF_LE_L(file->dir_ent.size),(unsigned long long)clusters*fs->cluster_size,
+ CF_LE_L(file->dir_ent.size));
+ truncate_file(fs,file,clusters);
+ break;
+ }
+ if ((owner = get_owner(fs,curr))) {
+ int do_trunc = 0;
+ printf("%s and\n",path_name(owner));
+ printf("%s\n share clusters.\n",path_name(file));
+ clusters2 = 0;
+ for (walk = FSTART(owner,fs); walk > 0 && walk != -1; walk =
+ next_cluster(fs,walk))
+ if (walk == curr) break;
+ else clusters2++;
+ restart = file->dir_ent.attr & ATTR_DIR;
+ if (!owner->offset) {
+ printf( " Truncating second to %llu bytes because first "
+ "is FAT32 root dir.\n", (unsigned long long)clusters2*fs->cluster_size );
+ do_trunc = 2;
+ }
+ else if (!file->offset) {
+ printf( " Truncating first to %llu bytes because second "
+ "is FAT32 root dir.\n", (unsigned long long)clusters*fs->cluster_size );
+ do_trunc = 1;
+ }
+ else if (interactive)
+ printf("1) Truncate first to %llu bytes%s\n"
+ "2) Truncate second to %llu bytes\n",(unsigned long long)clusters*fs->cluster_size,
+ restart ? " and restart" : "",(unsigned long long)clusters2*fs->cluster_size);
+ else printf(" Truncating second to %llu bytes.\n",(unsigned long long)clusters2*
+ fs->cluster_size);
+ if (do_trunc != 2 &&
+ (do_trunc == 1 ||
+ (interactive && get_key("12","?") == '1'))) {
+ prev = 0;
+ clusters = 0;
+ for (this = FSTART(owner,fs); this > 0 && this != -1; this =
+ next_cluster(fs,this)) {
+ if (this == curr) {
+ if (prev) set_fat(fs,prev,-1);
+ else MODIFY_START(owner,0,fs);
+ MODIFY(owner,size,CT_LE_L((unsigned long long)clusters*fs->cluster_size));
+ if (restart) return 1;
+ while (this > 0 && this != -1) {
+ set_owner(fs,this,NULL);
+ this = next_cluster(fs,this);
+ }
+ this = curr;
+ break;
+ }
+ clusters++;
+ prev = this;
+ }
+ if (this != curr)
+ die("Internal error: didn't find cluster %d in chain"
+ " starting at %d",curr,FSTART(owner,fs));
+ }
+ else {
+ if (prev) set_fat(fs,prev,-1);
+ else MODIFY_START(file,0,fs);
+ break;
+ }
+ }
+ set_owner(fs,curr,file);
+ clusters++;
+ prev = curr;
+ }
+ if (!(file->dir_ent.attr & ATTR_DIR) && CF_LE_L(file->dir_ent.size) >
+ (unsigned long long)clusters*fs->cluster_size) {
+ printf("%s\n File size is %u bytes, cluster chain length is %llu bytes."
+ "\n Truncating file to %lu bytes.\n",path_name(file),CF_LE_L(file->
+ dir_ent.size),(unsigned long long)clusters*fs->cluster_size,(unsigned long long)clusters*fs->cluster_size);
+ MODIFY(file,size,CT_LE_L((unsigned long long)clusters*fs->cluster_size));
+ }
+ return 0;
+}
+
+
+static int check_files(DOS_FS *fs,DOS_FILE *start)
+{
+ while (start) {
+ if (check_file(fs,start)) return 1;
+ start = start->next;
+ }
+ return 0;
+}
+
+
+static int check_dir(DOS_FS *fs,DOS_FILE **root,int dots)
+{
+ DOS_FILE *parent,**walk,**scan;
+ int dot,dotdot,skip,redo;
+ int good,bad;
+
+ if (!*root) return 0;
+ parent = (*root)->parent;
+ good = bad = 0;
+ for (walk = root; *walk; walk = &(*walk)->next)
+ if (bad_name((*walk)->dir_ent.name)) bad++;
+ else good++;
+ if (*root && parent && good+bad > 4 && bad > good/2) {
+ printf("%s\n Has a large number of bad entries. (%d/%d)\n",
+ path_name(parent),bad,good+bad);
+ if (!dots) printf( " Not dropping root directory.\n" );
+ else if (!interactive) printf(" Not dropping it in auto-mode.\n");
+ else if (get_key("yn","Drop directory ? (y/n)") == 'y') {
+ truncate_file(fs,parent,0);
+ MODIFY(parent,name[0],DELETED_FLAG);
+ /* buglet: deleted directory stays in the list. */
+ return 1;
+ }
+ }
+ dot = dotdot = redo = 0;
+ walk = root;
+ while (*walk) {
+ if (!strncmp((*walk)->dir_ent.name,MSDOS_DOT,MSDOS_NAME) ||
+ !strncmp((*walk)->dir_ent.name,MSDOS_DOTDOT,MSDOS_NAME)) {
+ if (handle_dot(fs,*walk,dots)) {
+ *walk = (*walk)->next;
+ continue;
+ }
+ if (!strncmp((*walk)->dir_ent.name,MSDOS_DOT,MSDOS_NAME)) dot++;
+ else dotdot++;
+ }
+ if (!((*walk)->dir_ent.attr & ATTR_VOLUME) &&
+ bad_name((*walk)->dir_ent.name)) {
+ printf("%s\n Bad file name.\n",path_name(*walk));
+ if (interactive)
+ printf("1) Drop file\n2) Rename file\n3) Auto-rename\n"
+ "4) Keep it\n");
+ else printf(" Auto-renaming it.\n");
+ switch (interactive ? get_key("1234","?") : '3') {
+ case '1':
+ drop_file(fs,*walk);
+ walk = &(*walk)->next;
+ continue;
+ case '2':
+ rename_file(*walk);
+ redo = 1;
+ break;
+ case '3':
+ auto_rename(*walk);
+ printf(" Renamed to %s\n",file_name((*walk)->dir_ent.
+ name));
+ break;
+ case '4':
+ break;
+ }
+ }
+ /* don't check for duplicates of the volume label */
+ if (!((*walk)->dir_ent.attr & ATTR_VOLUME)) {
+ scan = &(*walk)->next;
+ skip = 0;
+ while (*scan && !skip) {
+ if (!((*scan)->dir_ent.attr & ATTR_VOLUME) &&
+ !strncmp((*walk)->dir_ent.name,(*scan)->dir_ent.name,MSDOS_NAME)) {
+ printf("%s\n Duplicate directory entry.\n First %s\n",
+ path_name(*walk),file_stat(*walk));
+ printf(" Second %s\n",file_stat(*scan));
+ if (interactive)
+ printf("1) Drop first\n2) Drop second\n3) Rename first\n"
+ "4) Rename second\n5) Auto-rename first\n"
+ "6) Auto-rename second\n");
+ else printf(" Auto-renaming second.\n");
+ switch (interactive ? get_key("123456","?") : '6') {
+ case '1':
+ drop_file(fs,*walk);
+ *walk = (*walk)->next;
+ skip = 1;
+ break;
+ case '2':
+ drop_file(fs,*scan);
+ *scan = (*scan)->next;
+ continue;
+ case '3':
+ rename_file(*walk);
+ printf(" Renamed to %s\n",path_name(*walk));
+ redo = 1;
+ break;
+ case '4':
+ rename_file(*scan);
+ printf(" Renamed to %s\n",path_name(*walk));
+ redo = 1;
+ break;
+ case '5':
+ auto_rename(*walk);
+ printf(" Renamed to %s\n",file_name((*walk)->dir_ent.
+ name));
+ break;
+ case '6':
+ auto_rename(*scan);
+ printf(" Renamed to %s\n",file_name((*scan)->dir_ent.
+ name));
+ break;
+ }
+ }
+ scan = &(*scan)->next;
+ }
+ if (skip) continue;
+ }
+ if (!redo) walk = &(*walk)->next;
+ else {
+ walk = root;
+ dot = dotdot = redo = 0;
+ }
+ }
+ if (dots && !dot)
+ printf("%s\n \".\" is missing. Can't fix this yet.\n",
+ path_name(parent));
+ if (dots && !dotdot)
+ printf("%s\n \"..\" is missing. Can't fix this yet.\n",
+ path_name(parent));
+ return 0;
+}
+
+
+static void test_file(DOS_FS *fs,DOS_FILE *file,int read_test)
+{
+ DOS_FILE *owner;
+ unsigned long walk,prev,clusters,next_clu;
+
+ prev = clusters = 0;
+ for (walk = FSTART(file,fs); walk > 0 && walk < fs->clusters+2;
+ walk = next_clu) {
+ next_clu = next_cluster(fs,walk);
+ if ((owner = get_owner(fs,walk))) {
+ if (owner == file) {
+ printf("%s\n Circular cluster chain. Truncating to %lu "
+ "cluster%s.\n",path_name(file),clusters,clusters == 1 ? "" :
+ "s");
+ if (prev) set_fat(fs,prev,-1);
+ else if (!file->offset)
+ die( "Bad FAT32 root directory! (bad start cluster)\n" );
+ else MODIFY_START(file,0,fs);
+ }
+ break;
+ }
+ if (bad_cluster(fs,walk)) break;
+ if (read_test) {
+ if (fs_test(cluster_start(fs,walk),fs->cluster_size)) {
+ prev = walk;
+ clusters++;
+ }
+ else {
+ printf("%s\n Cluster %lu (%lu) is unreadable. Skipping it.\n",
+ path_name(file),clusters,walk);
+ if (prev) set_fat(fs,prev,next_cluster(fs,walk));
+ else MODIFY_START(file,next_cluster(fs,walk),fs);
+ set_fat(fs,walk,-2);
+ }
+ }
+ set_owner(fs,walk,file);
+ }
+ for (walk = FSTART(file,fs); walk > 0 && walk < fs->clusters+2;
+ walk = next_cluster(fs,walk))
+ if (bad_cluster(fs,walk)) break;
+ else if (get_owner(fs,walk) == file) set_owner(fs,walk,NULL);
+ else break;
+}
+
+
+static void undelete(DOS_FS *fs,DOS_FILE *file)
+{
+ unsigned long clusters,left,prev,walk;
+
+ clusters = left = (CF_LE_L(file->dir_ent.size)+fs->cluster_size-1)/
+ fs->cluster_size;
+ prev = 0;
+ for (walk = FSTART(file,fs); left && walk >= 2 && walk <
+ fs->clusters+2 && !fs->fat[walk].value; walk++) {
+ left--;
+ if (prev) set_fat(fs,prev,walk);
+ prev = walk;
+ }
+ if (prev) set_fat(fs,prev,-1);
+ else MODIFY_START(file,0,fs);
+ if (left)
+ printf("Warning: Did only undelete %lu of %lu cluster%s.\n",clusters-left,
+ clusters,clusters == 1 ? "" : "s");
+
+}
+
+
+static void new_dir( void )
+{
+ lfn_reset();
+}
+
+
+static void add_file(DOS_FS *fs,DOS_FILE ***chain,DOS_FILE *parent,
+ loff_t offset,FDSC **cp)
+{
+ DOS_FILE *new;
+ DIR_ENT de;
+ FD_TYPE type;
+
+ if (offset)
+ fs_read(offset,sizeof(DIR_ENT),&de);
+ else {
+ memcpy(de.name," ",MSDOS_NAME);
+ de.attr = ATTR_DIR;
+ de.size = de.time = de.date = 0;
+ de.start = CT_LE_W(fs->root_cluster & 0xffff);
+ de.starthi = CT_LE_W((fs->root_cluster >> 16) & 0xffff);
+ }
+ if ((type = file_type(cp,de.name)) != fdt_none) {
+ if (type == fdt_undelete && (de.attr & ATTR_DIR))
+ die("Can't undelete directories.");
+ file_modify(cp,de.name);
+ fs_write(offset,1,&de);
+ }
+ if (IS_FREE(de.name)) {
+ lfn_check_orphaned();
+ return;
+ }
+ if (de.attr == VFAT_LN_ATTR) {
+ lfn_add_slot(&de,offset);
+ return;
+ }
+ new = qalloc(&mem_queue,sizeof(DOS_FILE));
+ new->lfn = lfn_get(&de);
+ new->offset = offset;
+ memcpy(&new->dir_ent,&de,sizeof(de));
+ new->next = new->first = NULL;
+ new->parent = parent;
+ if (type == fdt_undelete) undelete(fs,new);
+ **chain = new;
+ *chain = &new->next;
+ if (list) {
+ printf("Checking file %s",path_name(new));
+ if (new->lfn)
+ printf(" (%s)", file_name(new->dir_ent.name) );
+ printf("\n");
+ }
+ if (offset &&
+ strncmp(de.name,MSDOS_DOT,MSDOS_NAME) != 0 &&
+ strncmp(de.name,MSDOS_DOTDOT,MSDOS_NAME) != 0)
+ ++n_files;
+ test_file(fs,new,test);
+}
+
+
+static int subdirs(DOS_FS *fs,DOS_FILE *parent,FDSC **cp);
+
+
+static int scan_dir(DOS_FS *fs,DOS_FILE *this,FDSC **cp)
+{
+ DOS_FILE **chain;
+ int i;
+ unsigned long clu_num;
+
+ chain = &this->first;
+ i = 0;
+ clu_num = FSTART(this,fs);
+ new_dir();
+ while (clu_num > 0 && clu_num != -1) {
+ add_file(fs,&chain,this,cluster_start(fs,clu_num)+(i % fs->
+ cluster_size),cp);
+ i += sizeof(DIR_ENT);
+ if (!(i % fs->cluster_size))
+ if ((clu_num = next_cluster(fs,clu_num)) == 0 || clu_num == -1)
+ break;
+ }
+ lfn_check_orphaned();
+ if (check_dir(fs,&this->first,this->offset)) return 0;
+ if (check_files(fs,this->first)) return 1;
+ return subdirs(fs,this,cp);
+}
+
+
+static int subdirs(DOS_FS *fs,DOS_FILE *parent,FDSC **cp)
+{
+ DOS_FILE *walk;
+
+ for (walk = parent ? parent->first : root; walk; walk = walk->next)
+ if (walk->dir_ent.attr & ATTR_DIR)
+ if (strncmp(walk->dir_ent.name,MSDOS_DOT,MSDOS_NAME) &&
+ strncmp(walk->dir_ent.name,MSDOS_DOTDOT,MSDOS_NAME))
+ if (scan_dir(fs,walk,file_cd(cp,walk->dir_ent.name))) return 1;
+ return 0;
+}
+
+
+int scan_root(DOS_FS *fs)
+{
+ DOS_FILE **chain;
+ int i;
+
+ root = NULL;
+ chain = &root;
+ new_dir();
+ if (fs->root_cluster) {
+ add_file(fs,&chain,NULL,0,&fp_root);
+ }
+ else {
+ for (i = 0; i < fs->root_entries; i++)
+ add_file(fs,&chain,NULL,fs->root_start+i*sizeof(DIR_ENT),&fp_root);
+ }
+ lfn_check_orphaned();
+ (void) check_dir(fs,&root,0);
+ if (check_files(fs,root)) return 1;
+ return subdirs(fs,NULL,&fp_root);
+}
+
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
diff --git a/src/check.h b/src/check.h
new file mode 100644
index 0000000..a41bb86
--- /dev/null
+++ b/src/check.h
@@ -0,0 +1,40 @@
+/* check.h - Check and repair a PC/MS-DOS file system
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+
+#ifndef _CHECK_H
+#define _CHECK_H
+
+loff_t alloc_rootdir_entry(DOS_FS *fs, DIR_ENT *de, const char *pattern);
+
+/* Allocate a free slot in the root directory for a new file. The file name is
+ constructed after 'pattern', which must include a %d type format for printf
+ and expand to exactly 11 characters. The name actually used is written into
+ the 'de' structure, the rest of *de is cleared. The offset returned is to
+ where in the filesystem the entry belongs. */
+
+int scan_root(DOS_FS *fs);
+
+/* Scans the root directory and recurses into all subdirectories. See check.c
+ for all the details. Returns a non-zero integer if the file system has to
+ be checked again. */
+
+#endif
diff --git a/src/common.c b/src/common.c
new file mode 100644
index 0000000..92312e4
--- /dev/null
+++ b/src/common.c
@@ -0,0 +1,125 @@
+/* common.c - Common functions
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include "common.h"
+
+
+typedef struct _link {
+ void *data;
+ struct _link *next;
+} LINK;
+
+
+void die(char *msg,...)
+{
+ va_list args;
+
+ va_start(args,msg);
+ vfprintf(stderr,msg,args);
+ va_end(args);
+ fprintf(stderr,"\n");
+ exit(1);
+}
+
+
+void pdie(char *msg,...)
+{
+ va_list args;
+
+ va_start(args,msg);
+ vfprintf(stderr,msg,args);
+ va_end(args);
+ fprintf(stderr,":%s\n",strerror(errno));
+ exit(1);
+}
+
+
+void *alloc(int size)
+{
+ void *this;
+
+ if ((this = malloc(size))) return this;
+ pdie("malloc");
+ return NULL; /* for GCC */
+}
+
+
+void *qalloc(void **root,int size)
+{
+ LINK *link;
+
+ link = alloc(sizeof(LINK));
+ link->next = *root;
+ *root = link;
+ return link->data = alloc(size);
+}
+
+
+void qfree(void **root)
+{
+ LINK *this;
+
+ while (*root) {
+ this = (LINK *) *root;
+ *root = this->next;
+ free(this->data);
+ free(this);
+ }
+}
+
+
+int min(int a,int b)
+{
+ return a < b ? a : b;
+}
+
+
+char get_key(char *valid,char *prompt)
+{
+ int ch,okay;
+
+ while (1) {
+ if (prompt) printf("%s ",prompt);
+ fflush(stdout);
+ while (ch = getchar(), ch == ' ' || ch == '\t');
+ if (ch == EOF) exit(1);
+ if (!strchr(valid,okay = ch)) okay = 0;
+ while (ch = getchar(), ch != '\n' && ch != EOF);
+ if (ch == EOF) exit(1);
+ if (okay) return okay;
+ printf("Invalid input.\n");
+ }
+}
+
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
diff --git a/src/common.h b/src/common.h
new file mode 100644
index 0000000..99e0be1
--- /dev/null
+++ b/src/common.h
@@ -0,0 +1,57 @@
+/* common.h - Common functions
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+# include <asm/types.h>
+
+#ifndef _COMMON_H
+#define _COMMON_H
+
+void die(char *msg,...) __attribute((noreturn));
+
+/* Displays a prinf-style message and terminates the program. */
+
+void pdie(char *msg,...) __attribute((noreturn));
+
+/* Like die, but appends an error message according to the state of errno. */
+
+void *alloc(int size);
+
+/* mallocs SIZE bytes and returns a pointer to the data. Terminates the program
+ if malloc fails. */
+
+void *qalloc(void **root,int size);
+
+/* Like alloc, but registers the data area in a list described by ROOT. */
+
+void qfree(void **root);
+
+/* Deallocates all qalloc'ed data areas described by ROOT. */
+
+int min(int a,int b);
+
+/* Returns the smaller integer value of a and b. */
+
+char get_key(char *valid,char *prompt);
+
+/* Displays PROMPT and waits for user input. Only characters in VALID are
+ accepted. Terminates the program on EOF. Returns the character. */
+
+#endif
diff --git a/src/dosfsck.c b/src/dosfsck.c
new file mode 100644
index 0000000..c4bcf1b
--- /dev/null
+++ b/src/dosfsck.c
@@ -0,0 +1,207 @@
+/* dosfsck.c - User interface
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+
+#include "version.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <getopt.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "io.h"
+#include "boot.h"
+#include "fat.h"
+#include "file.h"
+#include "check.h"
+
+
+int interactive = 0,list = 0,test = 0,verbose = 0,write_immed = 0;
+int atari_format = 0;
+unsigned n_files = 0;
+void *mem_queue = NULL;
+
+
+static void usage(char *name)
+{
+ fprintf(stderr,"usage: %s [-aAflrtvVwy] [-d path -d ...] "
+ "[-u path -u ...]\n%15sdevice\n",name,"");
+ fprintf(stderr," -a automatically repair the file system\n");
+ fprintf(stderr," -A toggle Atari file system format\n");
+ fprintf(stderr," -d path drop that file\n");
+ fprintf(stderr," -f salvage unused chains to files\n");
+ fprintf(stderr," -l list path names\n");
+ fprintf(stderr," -n no-op, check non-interactively without changing\n");
+ fprintf(stderr," -p same as -a, for compat with other *fsck\n");
+ fprintf(stderr," -r interactively repair the file system\n");
+ fprintf(stderr," -t test for bad clusters\n");
+ fprintf(stderr," -u path try to undelete that (non-directory) file\n");
+ fprintf(stderr," -v verbose mode\n");
+ fprintf(stderr," -V perform a verification pass\n");
+ fprintf(stderr," -w write changes to disk immediately\n");
+ fprintf(stderr," -y same as -a, for compat with other *fsck\n");
+ exit(2);
+}
+
+
+/*
+ * ++roman: On m68k, check if this is an Atari; if yes, turn on Atari variant
+ * of MS-DOS filesystem by default.
+ */
+static void check_atari( void )
+{
+#ifdef __mc68000__
+ FILE *f;
+ char line[128], *p;
+
+ if (!(f = fopen( "/proc/hardware", "r" ))) {
+ perror( "/proc/hardware" );
+ return;
+ }
+
+ while( fgets( line, sizeof(line), f ) ) {
+ if (strncmp( line, "Model:", 6 ) == 0) {
+ p = line + 6;
+ p += strspn( p, " \t" );
+ if (strncmp( p, "Atari ", 6 ) == 0)
+ atari_format = 1;
+ break;
+ }
+ }
+ fclose( f );
+#endif
+}
+
+
+int main(int argc,char **argv)
+{
+ DOS_FS fs;
+ int rw,salvage_files,verify,c;
+ unsigned n_files_check=0, n_files_verify=0;
+ unsigned long free_clusters;
+
+ rw = salvage_files = verify = 0;
+ interactive = 1;
+ check_atari();
+
+ while ((c = getopt(argc,argv,"Aad:flnprtu:vVwy")) != EOF)
+ switch (c) {
+ case 'A': /* toggle Atari format */
+ atari_format = !atari_format;
+ break;
+ case 'a':
+ case 'p':
+ case 'y':
+ rw = 1;
+ interactive = 0;
+// salvage_files = 1;
+ break;
+ case 'd':
+ file_add(optarg,fdt_drop);
+ break;
+ case 'f':
+ salvage_files = 1;
+ break;
+ case 'l':
+ list = 1;
+ break;
+ case 'n':
+ rw = 0;
+ interactive = 0;
+ break;
+ case 'r':
+ rw = 1;
+ interactive = 1;
+ break;
+ case 't':
+ test = 1;
+ break;
+ case 'u':
+ file_add(optarg,fdt_undelete);
+ break;
+ case 'v':
+ verbose = 1;
+ printf("dosfsck " VERSION " (" VERSION_DATE ")\n");
+ break;
+ case 'V':
+ verify = 1;
+ break;
+ case 'w':
+ write_immed = 1;
+ break;
+ default:
+ usage(argv[0]);
+ }
+ if ((test || write_immed) && !rw) {
+ fprintf(stderr,"-t and -w require -a or -r\n");
+ exit(2);
+ }
+ if (optind != argc-1) usage(argv[0]);
+
+ printf( "dosfsck " VERSION ", " VERSION_DATE ", FAT32, LFN\n" );
+ fs_open(argv[optind],rw);
+ read_boot(&fs);
+ if (verify) printf("Starting check/repair pass.\n");
+ while (read_fat(&fs), scan_root(&fs)) qfree(&mem_queue);
+ if (test) fix_bad(&fs);
+ if (salvage_files) reclaim_file(&fs);
+ else reclaim_free(&fs);
+ free_clusters = update_free(&fs);
+ file_unused();
+ qfree(&mem_queue);
+ n_files_check = n_files;
+ if (verify) {
+ n_files = 0;
+ printf("Starting verification pass.\n");
+ read_fat(&fs);
+ scan_root(&fs);
+ reclaim_free(&fs);
+ qfree(&mem_queue);
+ n_files_verify = n_files;
+ }
+
+ if (fs_changed()) {
+ if (rw) {
+ if (interactive)
+ rw = get_key("yn","Perform changes ? (y/n)") == 'y';
+ else printf("Performing changes.\n");
+ }
+ else
+ printf("Leaving file system unchanged.\n");
+ }
+
+ printf( "%s: %u files, %lu/%lu clusters\n", argv[optind],
+ n_files, fs.clusters - free_clusters, fs.clusters );
+
+ exit(fs_close(rw) ? 4 : 0);
+}
+
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
diff --git a/src/dosfsck.h b/src/dosfsck.h
new file mode 100644
index 0000000..3d2004c
--- /dev/null
+++ b/src/dosfsck.h
@@ -0,0 +1,220 @@
+/* dosfsck.h - Common data structures and global variables
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+
+#ifndef _DOSFSCK_H
+#define _DOSFSCK_H
+
+#include <sys/types.h>
+#define _LINUX_STAT_H /* hack to avoid inclusion of <linux/stat.h> */
+#define _LINUX_STRING_H_ /* hack to avoid inclusion of <linux/string.h>*/
+#define _LINUX_FS_H /* hack to avoid inclusion of <linux/fs.h> */
+
+# include <asm/types.h>
+# include <asm/byteorder.h>
+
+#include <linux/msdos_fs.h>
+
+#undef CF_LE_W
+#undef CF_LE_L
+#undef CT_LE_W
+#undef CT_LE_L
+
+#if defined __arm__
+ #undef __BYTE_ORDER
+ #define __BYTE_ORDER __LITTLE_ENDIAN
+#endif
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#include <byteswap.h>
+#define CF_LE_W(v) bswap_16(v)
+#define CF_LE_L(v) bswap_32(v)
+#define CT_LE_W(v) CF_LE_W(v)
+#define CT_LE_L(v) CF_LE_L(v)
+#else
+#define CF_LE_W(v) (v)
+#define CF_LE_L(v) (v)
+#define CT_LE_W(v) (v)
+#define CT_LE_L(v) (v)
+#endif /* __BIG_ENDIAN */
+
+#define VFAT_LN_ATTR (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
+
+/* ++roman: Use own definition of boot sector structure -- the kernel headers'
+ * name for it is msdos_boot_sector in 2.0 and fat_boot_sector in 2.1 ... */
+struct boot_sector {
+ __u8 ignored[3]; /* Boot strap short or near jump */
+ __u8 system_id[8]; /* Name - can be used to special case
+ partition manager volumes */
+ __u8 sector_size[2]; /* bytes per logical sector */
+ __u8 cluster_size; /* sectors/cluster */
+ __u16 reserved; /* reserved sectors */
+ __u8 fats; /* number of FATs */
+ __u8 dir_entries[2]; /* root directory entries */
+ __u8 sectors[2]; /* number of sectors */
+ __u8 media; /* media code (unused) */
+ __u16 fat_length; /* sectors/FAT */
+ __u16 secs_track; /* sectors per track */
+ __u16 heads; /* number of heads */
+ __u32 hidden; /* hidden sectors (unused) */
+ __u32 total_sect; /* number of sectors (if sectors == 0) */
+
+ /* The following fields are only used by FAT32 */
+ __u32 fat32_length; /* sectors/FAT */
+ __u16 flags; /* bit 8: fat mirroring, low 4: active fat */
+ __u8 version[2]; /* major, minor filesystem version */
+ __u32 root_cluster; /* first cluster in root directory */
+ __u16 info_sector; /* filesystem info sector */
+ __u16 backup_boot; /* backup boot sector */
+ __u8 reserved2[12]; /* Unused */
+
+ __u8 drive_number; /* Logical Drive Number */
+ __u8 reserved3; /* Unused */
+
+ __u8 extended_sig; /* Extended Signature (0x29) */
+ __u32 serial; /* Serial number */
+ __u8 label[11]; /* FS label */
+ __u8 fs_type[8]; /* FS Type */
+
+ /* fill up to 512 bytes */
+ __u8 junk[422];
+} __attribute__ ((packed));
+
+struct boot_sector_16 {
+ __u8 ignored[3]; /* Boot strap short or near jump */
+ __u8 system_id[8]; /* Name - can be used to special case
+ partition manager volumes */
+ __u8 sector_size[2]; /* bytes per logical sector */
+ __u8 cluster_size; /* sectors/cluster */
+ __u16 reserved; /* reserved sectors */
+ __u8 fats; /* number of FATs */
+ __u8 dir_entries[2]; /* root directory entries */
+ __u8 sectors[2]; /* number of sectors */
+ __u8 media; /* media code (unused) */
+ __u16 fat_length; /* sectors/FAT */
+ __u16 secs_track; /* sectors per track */
+ __u16 heads; /* number of heads */
+ __u32 hidden; /* hidden sectors (unused) */
+ __u32 total_sect; /* number of sectors (if sectors == 0) */
+
+ __u8 drive_number; /* Logical Drive Number */
+ __u8 reserved2; /* Unused */
+
+ __u8 extended_sig; /* Extended Signature (0x29) */
+ __u32 serial; /* Serial number */
+ __u8 label[11]; /* FS label */
+ __u8 fs_type[8]; /* FS Type */
+
+ /* fill up to 512 bytes */
+ __u8 junk[450];
+} __attribute__ ((packed));
+
+struct info_sector {
+ __u32 magic; /* Magic for info sector ('RRaA') */
+ __u8 junk[0x1dc];
+ __u32 reserved1; /* Nothing as far as I can tell */
+ __u32 signature; /* 0x61417272 ('rrAa') */
+ __u32 free_clusters; /* Free cluster count. -1 if unknown */
+ __u32 next_cluster; /* Most recently allocated cluster. */
+ __u32 reserved2[3];
+ __u16 reserved3;
+ __u16 boot_sign;
+};
+
+typedef struct {
+ __u8 name[8],ext[3]; /* name and extension */
+ __u8 attr; /* attribute bits */
+ __u8 lcase; /* Case for base and extension */
+ __u8 ctime_ms; /* Creation time, milliseconds */
+ __u16 ctime; /* Creation time */
+ __u16 cdate; /* Creation date */
+ __u16 adate; /* Last access date */
+ __u16 starthi; /* High 16 bits of cluster in FAT32 */
+ __u16 time,date,start;/* time, date and first cluster */
+ __u32 size; /* file size (in bytes) */
+} DIR_ENT;
+
+typedef struct _dos_file {
+ DIR_ENT dir_ent;
+ char *lfn;
+ loff_t offset;
+ struct _dos_file *parent; /* parent directory */
+ struct _dos_file *next; /* next entry */
+ struct _dos_file *first; /* first entry (directory only) */
+} DOS_FILE;
+
+typedef struct {
+ unsigned long value;
+ unsigned long reserved;
+ DOS_FILE *owner;
+ int prev; /* number of previous clusters */
+} FAT_ENTRY;
+
+typedef struct {
+ int nfats;
+ loff_t fat_start;
+ unsigned int fat_size; /* unit is bytes */
+ unsigned int fat_bits; /* size of a FAT entry */
+ unsigned int eff_fat_bits; /* # of used bits in a FAT entry */
+ unsigned long root_cluster; /* 0 for old-style root dir */
+ loff_t root_start;
+ unsigned int root_entries;
+ loff_t data_start;
+ unsigned int cluster_size;
+ unsigned long clusters;
+ loff_t fsinfo_start; /* 0 if not present */
+ long free_clusters;
+ loff_t backupboot_start; /* 0 if not present */
+ FAT_ENTRY *fat;
+ char *label;
+} DOS_FS;
+
+#ifndef offsetof
+#define offsetof(t,e) ((int)&(((t *)0)->e))
+#endif
+
+extern int interactive,list,verbose,test,write_immed;
+extern int atari_format;
+extern unsigned n_files;
+extern void *mem_queue;
+
+/* value to use as end-of-file marker */
+#define FAT_EOF(fs) ((atari_format ? 0xfff : 0xff8) | FAT_EXTD(fs))
+#define FAT_IS_EOF(fs,v) ((unsigned long)(v) >= (0xff8|FAT_EXTD(fs)))
+/* value to mark bad clusters */
+#define FAT_BAD(fs) (0xff7 | FAT_EXTD(fs))
+/* range of values used for bad clusters */
+#define FAT_MIN_BAD(fs) ((atari_format ? 0xff0 : 0xff7) | FAT_EXTD(fs))
+#define FAT_MAX_BAD(fs) ((atari_format ? 0xff7 : 0xff7) | FAT_EXTD(fs))
+#define FAT_IS_BAD(fs,v) ((v) >= FAT_MIN_BAD(fs) && (v) <= FAT_MAX_BAD(fs))
+
+/* return -16 as a number with fs->fat_bits bits */
+#define FAT_EXTD(fs) (((1 << fs->eff_fat_bits)-1) & ~0xf)
+
+#endif
+
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
diff --git a/src/dosfslabel.c b/src/dosfslabel.c
new file mode 100644
index 0000000..e7be1f6
--- /dev/null
+++ b/src/dosfslabel.c
@@ -0,0 +1,126 @@
+/* dosfslabel.c - User interface
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2007 Red Hat, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#include "version.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <getopt.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "io.h"
+#include "boot.h"
+#include "fat.h"
+#include "file.h"
+#include "check.h"
+
+
+int interactive = 0,list = 0,test = 0,verbose = 0,write_immed = 0;
+int atari_format = 0;
+unsigned n_files = 0;
+void *mem_queue = NULL;
+
+
+static void usage(int error)
+{
+ FILE *f = error ? stderr : stdout;
+ int status = error ? 1 : 0;
+
+ fprintf(f,"usage: dosfslabel device [label]\n");
+ exit(status);
+}
+
+/*
+ * ++roman: On m68k, check if this is an Atari; if yes, turn on Atari variant
+ * of MS-DOS filesystem by default.
+ */
+static void check_atari( void )
+{
+#ifdef __mc68000__
+ FILE *f;
+ char line[128], *p;
+
+ if (!(f = fopen( "/proc/hardware", "r" ))) {
+ perror( "/proc/hardware" );
+ return;
+ }
+
+ while( fgets( line, sizeof(line), f ) ) {
+ if (strncmp( line, "Model:", 6 ) == 0) {
+ p = line + 6;
+ p += strspn( p, " \t" );
+ if (strncmp( p, "Atari ", 6 ) == 0)
+ atari_format = 1;
+ break;
+ }
+ }
+ fclose( f );
+#endif
+}
+
+
+int main(int argc, char *argv[])
+{
+ DOS_FS fs;
+ int rw = 0;
+
+ char *device = NULL;
+ char *label = NULL;
+
+ check_atari();
+
+ if (argc < 2 || argc > 3)
+ usage(1);
+
+ if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))
+ usage(0);
+ else if (!strcmp(argv[1], "-V") || !strcmp(argv[1], "--version")) {
+ printf( "dosfslabel " VERSION ", " VERSION_DATE ", FAT32, LFN\n" );
+ exit(0);
+ }
+
+ device = argv[1];
+ if (argc == 3) {
+ label = argv[2];
+ if (strlen(label) > 11) {
+ fprintf(stderr,
+ "dosfslabel: labels can be no longer than 11 characters\n");
+ exit(1);
+ }
+ rw = 1;
+ }
+
+ fs_open(device, rw);
+ read_boot(&fs);
+ if (!rw) {
+ fprintf(stdout, "%s\n", fs.label);
+ exit(0);
+ }
+
+ write_label(&fs, label);
+ return fs_close(rw) ? 1 : 0;
+}
diff --git a/src/fat.c b/src/fat.c
new file mode 100644
index 0000000..d09d888
--- /dev/null
+++ b/src/fat.c
@@ -0,0 +1,381 @@
+/* fat.c - Read/write access to the FAT
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "io.h"
+#include "check.h"
+#include "fat.h"
+
+
+static void get_fat(FAT_ENTRY *entry,void *fat,unsigned long cluster,DOS_FS *fs)
+{
+ unsigned char *ptr;
+
+ switch(fs->fat_bits) {
+ case 12:
+ ptr = &((unsigned char *) fat)[cluster*3/2];
+ entry->value = 0xfff & (cluster & 1 ? (ptr[0] >> 4) | (ptr[1] << 4) :
+ (ptr[0] | ptr[1] << 8));
+ break;
+ case 16:
+ entry->value = CF_LE_W(((unsigned short *) fat)[cluster]);
+ break;
+ case 32:
+ /* According to M$, the high 4 bits of a FAT32 entry are reserved and
+ * are not part of the cluster number. So we cut them off. */
+ {
+ unsigned long e = CF_LE_L(((unsigned int *) fat)[cluster]);
+ entry->value = e & 0xfffffff;
+ entry->reserved = e >> 28;
+ }
+ break;
+ default:
+ die("Bad FAT entry size: %d bits.",fs->fat_bits);
+ }
+ entry->owner = NULL;
+}
+
+
+void read_fat(DOS_FS *fs)
+{
+ int eff_size;
+ unsigned long i;
+ void *first,*second = NULL;
+ int first_ok,second_ok;
+
+ eff_size = ((fs->clusters+2ULL)*fs->fat_bits+7)/8ULL;
+ first = alloc(eff_size);
+ fs_read(fs->fat_start,eff_size,first);
+ if (fs->nfats > 1) {
+ second = alloc(eff_size);
+ fs_read(fs->fat_start+fs->fat_size,eff_size,second);
+ }
+ if (second && memcmp(first,second,eff_size) != 0) {
+ FAT_ENTRY first_media, second_media;
+ get_fat(&first_media,first,0,fs);
+ get_fat(&second_media,second,0,fs);
+ first_ok = (first_media.value & FAT_EXTD(fs)) == FAT_EXTD(fs);
+ second_ok = (second_media.value & FAT_EXTD(fs)) == FAT_EXTD(fs);
+ if (first_ok && !second_ok) {
+ printf("FATs differ - using first FAT.\n");
+ fs_write(fs->fat_start+fs->fat_size,eff_size,first);
+ }
+ if (!first_ok && second_ok) {
+ printf("FATs differ - using second FAT.\n");
+ fs_write(fs->fat_start,eff_size,second);
+ memcpy(first,second,eff_size);
+ }
+ if (first_ok && second_ok) {
+ if (interactive) {
+ printf("FATs differ but appear to be intact. Use which FAT ?\n"
+ "1) Use first FAT\n2) Use second FAT\n");
+ if (get_key("12","?") == '1') {
+ fs_write(fs->fat_start+fs->fat_size,eff_size,first);
+ } else {
+ fs_write(fs->fat_start,eff_size,second);
+ memcpy(first,second,eff_size);
+ }
+ }
+ else {
+ printf("FATs differ but appear to be intact. Using first "
+ "FAT.\n");
+ fs_write(fs->fat_start+fs->fat_size,eff_size,first);
+ }
+ }
+ if (!first_ok && !second_ok) {
+ printf("Both FATs appear to be corrupt. Giving up.\n");
+ exit(1);
+ }
+ }
+ if (second) {
+ free(second);
+ }
+ fs->fat = qalloc(&mem_queue,sizeof(FAT_ENTRY)*(fs->clusters+2ULL));
+ for (i = 2; i < fs->clusters+2; i++) get_fat(&fs->fat[i],first,i,fs);
+ for (i = 2; i < fs->clusters+2; i++)
+ if (fs->fat[i].value >= fs->clusters+2 &&
+ (fs->fat[i].value < FAT_MIN_BAD(fs))) {
+ printf("Cluster %ld out of range (%ld > %ld). Setting to EOF.\n",
+ i-2,fs->fat[i].value,fs->clusters+2-1);
+ set_fat(fs,i,-1);
+ }
+ free(first);
+}
+
+
+void set_fat(DOS_FS *fs,unsigned long cluster,unsigned long new)
+{
+ unsigned char data[4];
+ int size;
+ loff_t offs;
+
+ if ((long)new == -1)
+ new = FAT_EOF(fs);
+ else if ((long)new == -2)
+ new = FAT_BAD(fs);
+ switch( fs->fat_bits ) {
+ case 12:
+ offs = fs->fat_start+cluster*3/2;
+ if (cluster & 1) {
+ data[0] = ((new & 0xf) << 4) | (fs->fat[cluster-1].value >> 8);
+ data[1] = new >> 4;
+ }
+ else {
+ data[0] = new & 0xff;
+ data[1] = (new >> 8) | (cluster == fs->clusters-1 ? 0 :
+ (0xff & fs->fat[cluster+1].value) << 4);
+ }
+ size = 2;
+ break;
+ case 16:
+ offs = fs->fat_start+cluster*2;
+ *(unsigned short *) data = CT_LE_W(new);
+ size = 2;
+ break;
+ case 32:
+ offs = fs->fat_start+cluster*4;
+ /* According to M$, the high 4 bits of a FAT32 entry are reserved and
+ * are not part of the cluster number. So we never touch them. */
+ *(unsigned long *) data = CT_LE_L( (new & 0xfffffff) |
+ (fs->fat[cluster].reserved << 28) );
+ size = 4;
+ break;
+ default:
+ die("Bad FAT entry size: %d bits.",fs->fat_bits);
+ }
+ fs->fat[cluster].value = new;
+ fs_write(offs,size,&data);
+ fs_write(offs+fs->fat_size,size,&data);
+}
+
+
+int bad_cluster(DOS_FS *fs,unsigned long cluster)
+{
+ return FAT_IS_BAD(fs,fs->fat[cluster].value);
+}
+
+
+unsigned long next_cluster(DOS_FS *fs,unsigned long cluster)
+{
+ unsigned long value;
+
+ value = fs->fat[cluster].value;
+ if (FAT_IS_BAD(fs,value))
+ die("Internal error: next_cluster on bad cluster");
+ return FAT_IS_EOF(fs,value) ? -1 : value;
+}
+
+
+loff_t cluster_start(DOS_FS *fs,unsigned long cluster)
+{
+ return fs->data_start+((loff_t)cluster-2)*(unsigned long long)fs->cluster_size;
+}
+
+
+void set_owner(DOS_FS *fs,unsigned long cluster,DOS_FILE *owner)
+{
+ if (owner && fs->fat[cluster].owner)
+ die("Internal error: attempt to change file owner");
+ fs->fat[cluster].owner = owner;
+}
+
+
+DOS_FILE *get_owner(DOS_FS *fs,unsigned long cluster)
+{
+ return fs->fat[cluster].owner;
+}
+
+
+void fix_bad(DOS_FS *fs)
+{
+ unsigned long i;
+
+ if (verbose)
+ printf("Checking for bad clusters.\n");
+ for (i = 2; i < fs->clusters+2; i++)
+ if (!get_owner(fs,i) && !FAT_IS_BAD(fs,fs->fat[i].value))
+ if (!fs_test(cluster_start(fs,i),fs->cluster_size)) {
+ printf("Cluster %lu is unreadable.\n",i);
+ set_fat(fs,i,-2);
+ }
+}
+
+
+void reclaim_free(DOS_FS *fs)
+{
+ int reclaimed;
+ unsigned long i;
+
+ if (verbose)
+ printf("Checking for unused clusters.\n");
+ reclaimed = 0;
+ for (i = 2; i < fs->clusters+2; i++)
+ if (!get_owner(fs,i) && fs->fat[i].value &&
+ !FAT_IS_BAD(fs,fs->fat[i].value)) {
+ set_fat(fs,i,0);
+ reclaimed++;
+ }
+ if (reclaimed)
+ printf("Reclaimed %d unused cluster%s (%llu bytes).\n",reclaimed,
+ reclaimed == 1 ? "" : "s",(unsigned long long)reclaimed*fs->cluster_size);
+}
+
+
+static void tag_free(DOS_FS *fs,DOS_FILE *ptr)
+{
+ DOS_FILE *owner;
+ int prev;
+ unsigned long i,walk;
+
+ for (i = 2; i < fs->clusters+2; i++)
+ if (fs->fat[i].value && !FAT_IS_BAD(fs,fs->fat[i].value) &&
+ !get_owner(fs,i) && !fs->fat[i].prev) {
+ prev = 0;
+ for (walk = i; walk > 0 && walk != -1;
+ walk = next_cluster(fs,walk)) {
+ if (!(owner = get_owner(fs,walk))) set_owner(fs,walk,ptr);
+ else if (owner != ptr)
+ die("Internal error: free chain collides with file");
+ else {
+ set_fat(fs,prev,-1);
+ break;
+ }
+ prev = walk;
+ }
+ }
+}
+
+
+void reclaim_file(DOS_FS *fs)
+{
+ DOS_FILE dummy;
+ int reclaimed,files,changed;
+ unsigned long i,next,walk;
+
+ if (verbose)
+ printf("Reclaiming unconnected clusters.\n");
+ for (i = 2; i < fs->clusters+2; i++) fs->fat[i].prev = 0;
+ for (i = 2; i < fs->clusters+2; i++) {
+ next = fs->fat[i].value;
+ if (!get_owner(fs,i) && next && next < fs->clusters+2) {
+ if (get_owner(fs,next) || !fs->fat[next].value ||
+ FAT_IS_BAD(fs,fs->fat[next].value)) set_fat(fs,i,-1);
+ else fs->fat[next].prev++;
+ }
+ }
+ do {
+ tag_free(fs,&dummy);
+ changed = 0;
+ for (i = 2; i < fs->clusters+2; i++)
+ if (fs->fat[i].value && !FAT_IS_BAD(fs,fs->fat[i].value) &&
+ !get_owner(fs, i)) {
+ if (!fs->fat[fs->fat[i].value].prev--)
+ die("Internal error: prev going below zero");
+ set_fat(fs,i,-1);
+ changed = 1;
+ printf("Broke cycle at cluster %lu in free chain.\n",i);
+ break;
+ }
+ }
+ while (changed);
+ files = reclaimed = 0;
+ for (i = 2; i < fs->clusters+2; i++)
+ if (get_owner(fs,i) == &dummy && !fs->fat[i].prev) {
+ DIR_ENT de;
+ loff_t offset;
+ files++;
+ offset = alloc_rootdir_entry(fs,&de,"FSCK%04dREC");
+ de.start = CT_LE_W(i&0xffff);
+ if (fs->fat_bits == 32)
+ de.starthi = CT_LE_W(i>>16);
+ for (walk = i; walk > 0 && walk != -1;
+ walk = next_cluster(fs,walk)) {
+ de.size = CT_LE_L(CF_LE_L(de.size)+fs->cluster_size);
+ reclaimed++;
+ }
+ fs_write(offset,sizeof(DIR_ENT),&de);
+ }
+ if (reclaimed)
+ printf("Reclaimed %d unused cluster%s (%llu bytes) in %d chain%s.\n",
+ reclaimed,reclaimed == 1 ? "" : "s",(unsigned long long)reclaimed*fs->cluster_size,files,
+ files == 1 ? "" : "s");
+}
+
+
+unsigned long update_free(DOS_FS *fs)
+{
+ unsigned long i;
+ unsigned long free = 0;
+ int do_set = 0;
+
+ for (i = 2; i < fs->clusters+2; i++)
+ if (!get_owner(fs,i) && !FAT_IS_BAD(fs,fs->fat[i].value))
+ ++free;
+
+ if (!fs->fsinfo_start)
+ return free;
+
+ if (verbose)
+ printf("Checking free cluster summary.\n");
+ if (fs->free_clusters >= 0) {
+ if (free != fs->free_clusters) {
+ printf( "Free cluster summary wrong (%ld vs. really %ld)\n",
+ fs->free_clusters,free);
+ if (interactive)
+ printf( "1) Correct\n2) Don't correct\n" );
+ else printf( " Auto-correcting.\n" );
+ if (!interactive || get_key("12","?") == '1')
+ do_set = 1;
+ }
+ }
+ else {
+ printf( "Free cluster summary uninitialized (should be %ld)\n", free );
+ if (interactive)
+ printf( "1) Set it\n2) Leave it uninitialized\n" );
+ else printf( " Auto-setting.\n" );
+ if (!interactive || get_key("12","?") == '1')
+ do_set = 1;
+ }
+
+ if (do_set) {
+ fs->free_clusters = free;
+ free = CT_LE_L(free);
+ fs_write(fs->fsinfo_start+offsetof(struct info_sector,free_clusters),
+ sizeof(free),&free);
+ }
+
+ return free;
+}
+
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
diff --git a/src/fat.h b/src/fat.h
new file mode 100644
index 0000000..c5f7849
--- /dev/null
+++ b/src/fat.h
@@ -0,0 +1,81 @@
+/* fat.h - Read/write access to the FAT
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+
+#ifndef _FAT_H
+#define _FAT_H
+
+void read_fat(DOS_FS *fs);
+
+/* Loads the FAT of the file system described by FS. Initializes the FAT,
+ replaces broken FATs and rejects invalid cluster entries. */
+
+void set_fat(DOS_FS *fs,unsigned long cluster,unsigned long new);
+
+/* Changes the value of the CLUSTERth cluster of the FAT of FS to NEW. Special
+ values of NEW are -1 (EOF, 0xff8 or 0xfff8) and -2 (bad sector, 0xff7 or
+ 0xfff7) */
+
+int bad_cluster(DOS_FS *fs,unsigned long cluster);
+
+/* Returns a non-zero integer if the CLUSTERth cluster is marked as bad or zero
+ otherwise. */
+
+unsigned long next_cluster(DOS_FS *fs,unsigned long cluster);
+
+/* Returns the number of the cluster following CLUSTER, or -1 if this is the
+ last cluster of the respective cluster chain. CLUSTER must not be a bad
+ cluster. */
+
+loff_t cluster_start(DOS_FS *fs,unsigned long cluster);
+
+/* Returns the byte offset of CLUSTER, relative to the respective device. */
+
+void set_owner(DOS_FS *fs,unsigned long cluster,DOS_FILE *owner);
+
+/* Sets the owner pointer of the respective cluster to OWNER. If OWNER was NULL
+ before, it can be set to NULL or any non-NULL value. Otherwise, only NULL is
+ accepted as the new value. */
+
+DOS_FILE *get_owner(DOS_FS *fs,unsigned long cluster);
+
+/* Returns the owner of the repective cluster or NULL if the cluster has no
+ owner. */
+
+void fix_bad(DOS_FS *fs);
+
+/* Scans the disk for currently unused bad clusters and marks them as bad. */
+
+void reclaim_free(DOS_FS *fs);
+
+/* Marks all allocated, but unused clusters as free. */
+
+void reclaim_file(DOS_FS *fs);
+
+/* Scans the FAT for chains of allocated, but unused clusters and creates files
+ for them in the root directory. Also tries to fix all inconsistencies (e.g.
+ loops, shared clusters, etc.) in the process. */
+
+unsigned long update_free(DOS_FS *fs);
+
+/* Updates free cluster count in FSINFO sector. */
+
+#endif
diff --git a/src/file.c b/src/file.c
new file mode 100644
index 0000000..c389c60
--- /dev/null
+++ b/src/file.c
@@ -0,0 +1,263 @@
+/* file.c - Additional file attributes
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+
+#define _LINUX_STAT_H /* hack to avoid inclusion of <linux/stat.h> */
+#define _LINUX_STRING_H_ /* hack to avoid inclusion of <linux/string.h>*/
+#define _LINUX_FS_H /* hack to avoid inclusion of <linux/fs.h> */
+
+# include <asm/types.h>
+
+#include <linux/msdos_fs.h>
+
+#include "common.h"
+#include "file.h"
+
+
+FDSC *fp_root = NULL;
+
+
+static void put_char(char **p,unsigned char c)
+{
+ if ((c >= ' ' && c < 0x7f) || c >= 0xa0) *(*p)++ = c;
+ else {
+ *(*p)++ = '\\';
+ *(*p)++ = '0'+(c >> 6);
+ *(*p)++ = '0'+((c >> 3) & 7);
+ *(*p)++ = '0'+(c & 7);
+ }
+}
+
+
+char *file_name(unsigned char *fixed)
+{
+ static char path[MSDOS_NAME*4+2];
+ char *p;
+ int i,j;
+
+ p = path;
+ for (i = j = 0; i < 8; i++)
+ if (fixed[i] != ' ') {
+ while (j++ < i) *p++ = ' ';
+ put_char(&p,fixed[i]);
+ }
+ if (strncmp(fixed+8," ",3)) {
+ *p++ = '.';
+ for (i = j = 0; i < 3; i++)
+ if (fixed[i+8] != ' ') {
+ while (j++ < i) *p++ = ' ';
+ put_char(&p,fixed[i+8]);
+ }
+ }
+ *p = 0;
+ return path;
+}
+
+
+int file_cvt(unsigned char *name,unsigned char *fixed)
+{
+ unsigned char c;
+ int size,ext,cnt;
+
+ size = 8;
+ ext = 0;
+ while (*name) {
+ c = *name;
+ if (c < ' ' || c > 0x7e || strchr("*?<>|\"/",c)) {
+ printf("Invalid character in name. Use \\ooo for special "
+ "characters.\n");
+ return 0;
+ }
+ if (c == '.') {
+ if (ext) {
+ printf("Duplicate dots in name.\n");
+ return 0;
+ }
+ while (size--) *fixed++ = ' ';
+ size = 3;
+ ext = 1;
+ name++;
+ continue;
+ }
+ if (c == '\\') {
+ c = 0;
+ for (cnt = 3; cnt; cnt--) {
+ if (*name < '0' || *name > '7') {
+ printf("Invalid octal character.\n");
+ return 0;
+ }
+ c = c*8+*name++-'0';
+ }
+ if (cnt < 4) {
+ printf("Expected three octal digits.\n");
+ return 0;
+ }
+ name += 3;
+ }
+ if (islower(c)) c = toupper(c);
+ if (size) {
+ *fixed++ = c;
+ size--;
+ }
+ name++;
+ }
+ if (*name || size == 8) return 0;
+ if (!ext) {
+ while (size--) *fixed++ = ' ';
+ size = 3;
+ }
+ while (size--) *fixed++ = ' ';
+ return 1;
+}
+
+
+void file_add(char *path,FD_TYPE type)
+{
+ FDSC **current,*walk;
+ char name[MSDOS_NAME];
+ char *here;
+
+ current = &fp_root;
+ if (*path != '/') die("%s: Absolute path required.",path);
+ path++;
+ while (1) {
+ if ((here = strchr(path,'/'))) *here = 0;
+ if (!file_cvt(path,name)) exit(2);
+ for (walk = *current; walk; walk = walk->next)
+ if (!here && (!strncmp(name,walk->name,MSDOS_NAME) || (type ==
+ fdt_undelete && !strncmp(name+1,walk->name+1,MSDOS_NAME-1))))
+ die("Ambiguous name: \"%s\"",path);
+ else if (here && !strncmp(name,walk->name,MSDOS_NAME)) break;
+ if (!walk) {
+ walk = alloc(sizeof(FDSC));
+ strncpy(walk->name,name,MSDOS_NAME);
+ walk->type = here ? fdt_none : type;
+ walk->first = NULL;
+ walk->next = *current;
+ *current = walk;
+ }
+ current = &walk->first;
+ if (!here) break;
+ *here = '/';
+ path = here+1;
+ }
+}
+
+
+FDSC **file_cd(FDSC **curr,char *fixed)
+{
+ FDSC **walk;
+
+ if (!curr || !*curr) return NULL;
+ for (walk = curr; *walk; walk = &(*walk)->next)
+ if (!strncmp((*walk)->name,fixed,MSDOS_NAME) && (*walk)->first)
+ return &(*walk)->first;
+ return NULL;
+}
+
+
+static FDSC **file_find(FDSC **dir,char *fixed)
+{
+ if (!dir || !*dir) return NULL;
+ if (*(unsigned char *) fixed == DELETED_FLAG) {
+ while (*dir) {
+ if (!strncmp((*dir)->name+1,fixed+1,MSDOS_NAME-1) && !(*dir)->first)
+ return dir;
+ dir = &(*dir)->next;
+ }
+ return NULL;
+ }
+ while (*dir) {
+ if (!strncmp((*dir)->name,fixed,MSDOS_NAME) && !(*dir)->first)
+ return dir;
+ dir = &(*dir)->next;
+ }
+ return NULL;
+}
+
+
+FD_TYPE file_type(FDSC **curr,char *fixed)
+{
+ FDSC **this;
+
+ if ((this = file_find(curr,fixed))) return (*this)->type;
+ return fdt_none;
+}
+
+
+void file_modify(FDSC **curr,char *fixed)
+{
+ FDSC **this,*next;
+
+ if (!(this = file_find(curr,fixed)))
+ die("Internal error: file_find failed");
+ switch ((*this)->type) {
+ case fdt_drop:
+ printf("Dropping %s\n",file_name(fixed));
+ *(unsigned char *) fixed = DELETED_FLAG;
+ break;
+ case fdt_undelete:
+ *fixed = *(*this)->name;
+ printf("Undeleting %s\n",file_name(fixed));
+ break;
+ default:
+ die("Internal error: file_modify");
+ }
+ next = (*this)->next;
+ free(*this);
+ *this = next;
+}
+
+
+static void report_unused(FDSC *this)
+{
+ FDSC *next;
+
+ while (this) {
+ next = this->next;
+ if (this->first) report_unused(this->first);
+ else if (this->type != fdt_none)
+ printf("Warning: did not %s file %s\n",this->type == fdt_drop ?
+ "drop" : "undelete",file_name(this->name));
+ free(this);
+ this = next;
+ }
+}
+
+
+void file_unused(void)
+{
+ report_unused(fp_root);
+}
+
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
diff --git a/src/file.h b/src/file.h
new file mode 100644
index 0000000..b38523b
--- /dev/null
+++ b/src/file.h
@@ -0,0 +1,72 @@
+/* file.h - Additional file attributes
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+
+#ifndef _FILE_H
+#define _FILE_H
+
+typedef enum { fdt_none,fdt_drop,fdt_undelete } FD_TYPE;
+
+typedef struct _fptr {
+ char name[MSDOS_NAME];
+ FD_TYPE type;
+ struct _fptr *first; /* first entry */
+ struct _fptr *next; /* next file in directory */
+} FDSC;
+
+
+extern FDSC *fp_root;
+
+
+char *file_name(unsigned char *fixed);
+
+/* Returns a pointer to a pretty-printed representation of a fixed MS-DOS file
+ name. */
+
+int file_cvt(unsigned char *name,unsigned char *fixed);
+
+/* Converts a pretty-printed file name to the fixed MS-DOS format. Returns a
+ non-zero integer on success, zero on failure. */
+
+void file_add(char *path,FD_TYPE type);
+
+/* Define special attributes for a path. TYPE can be either FDT_DROP or
+ FDT_UNDELETE. */
+
+FDSC **file_cd(FDSC **curr,char *fixed);
+
+/* Returns a pointer to the directory descriptor of the subdirectory FIXED of
+ CURR, or NULL if no such subdirectory exists. */
+
+FD_TYPE file_type(FDSC **curr,char *fixed);
+
+/* Returns the attribute of the file FIXED in directory CURR or FDT_NONE if no
+ such file exists or if CURR is NULL. */
+
+void file_modify(FDSC **curr,char *fixed);
+
+/* Performs the necessary operation on the entry of CURR that is named FIXED. */
+
+void file_unused(void);
+
+/* Displays warnings for all unused file attributes. */
+
+#endif
diff --git a/src/io.c b/src/io.c
new file mode 100644
index 0000000..0ab0bbf
--- /dev/null
+++ b/src/io.c
@@ -0,0 +1,209 @@
+/* io.c - Virtual disk input/output
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/*
+ * Thu Feb 26 01:15:36 CET 1998: Martin Schulze <joey@infodrom.north.de>
+ * Fixed nasty bug that caused every file with a name like
+ * xxxxxxxx.xxx to be treated as bad name that needed to be fixed.
+ */
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/fd.h>
+
+#include "dosfsck.h"
+#include "common.h"
+#include "io.h"
+
+
+typedef struct _change {
+ void *data;
+ loff_t pos;
+ int size;
+ struct _change *next;
+} CHANGE;
+
+
+static CHANGE *changes,*last;
+static int fd,did_change = 0;
+
+unsigned device_no;
+
+
+#ifdef __DJGPP__
+#include "volume.h" /* DOS lowlevel disk access functions */
+#undef llseek
+static loff_t llseek( int fd, loff_t offset, int whence )
+{
+ if ((whence != SEEK_SET) || (fd == 4711)) return -1; /* only those supported */
+ return VolumeSeek(offset);
+}
+#define open OpenVolume
+#define close CloseVolume
+#define read(a,b,c) ReadVolume(b,c)
+#define write(a,b,c) WriteVolume(b,c)
+#endif
+
+void fs_open(char *path,int rw)
+{
+ struct stat stbuf;
+
+ if ((fd = open(path,rw ? O_RDWR : O_RDONLY)) < 0)
+ pdie("open %s",path);
+ changes = last = NULL;
+ did_change = 0;
+
+#ifndef _DJGPP_
+ if (fstat(fd,&stbuf) < 0)
+ pdie("fstat %s",path);
+ device_no = S_ISBLK(stbuf.st_mode) ? (stbuf.st_rdev >> 8) & 0xff : 0;
+#else
+ if (IsWorkingOnImageFile()) {
+ if (fstat(GetVolumeHandle(),&stbuf) < 0)
+ pdie("fstat image %s",path);
+ device_no = 0;
+ }
+ else {
+ /* return 2 for floppy, 1 for ramdisk, 7 for loopback */
+ /* used by boot.c in Atari mode: floppy always FAT12, */
+ /* loopback / ramdisk only FAT12 if usual floppy size, */
+ /* harddisk always FAT16 on Atari... */
+ device_no = (GetVolumeHandle() < 2) ? 2 : 1;
+ /* telling "floppy" for A:/B:, "ramdisk" for the rest */
+ }
+#endif
+}
+
+
+void fs_read(loff_t pos,int size,void *data)
+{
+ CHANGE *walk;
+ int got;
+
+ if (llseek(fd,pos,0) != pos) pdie("Seek to %lld",pos);
+ if ((got = read(fd,data,size)) < 0) pdie("Read %d bytes at %lld",size,pos);
+ if (got != size) die("Got %d bytes instead of %d at %lld",got,size,pos);
+ for (walk = changes; walk; walk = walk->next) {
+ if (walk->pos < pos+size && walk->pos+walk->size > pos) {
+ if (walk->pos < pos)
+ memcpy(data,(char *) walk->data+pos-walk->pos,min(size,
+ walk->size-pos+walk->pos));
+ else memcpy((char *) data+walk->pos-pos,walk->data,min(walk->size,
+ size+pos-walk->pos));
+ }
+ }
+}
+
+
+int fs_test(loff_t pos,int size)
+{
+ void *scratch;
+ int okay;
+
+ if (llseek(fd,pos,0) != pos) pdie("Seek to %lld",pos);
+ scratch = alloc(size);
+ okay = read(fd,scratch,size) == size;
+ free(scratch);
+ return okay;
+}
+
+
+void fs_write(loff_t pos,int size,void *data)
+{
+ CHANGE *new;
+ int did;
+
+ if (write_immed) {
+ did_change = 1;
+ if (llseek(fd,pos,0) != pos) pdie("Seek to %lld",pos);
+ if ((did = write(fd,data,size)) == size) return;
+ if (did < 0) pdie("Write %d bytes at %lld",size,pos);
+ die("Wrote %d bytes instead of %d at %lld",did,size,pos);
+ }
+ new = alloc(sizeof(CHANGE));
+ new->pos = pos;
+ memcpy(new->data = alloc(new->size = size),data,size);
+ new->next = NULL;
+ if (last) last->next = new;
+ else changes = new;
+ last = new;
+}
+
+
+static void fs_flush(void)
+{
+ CHANGE *this;
+ int size;
+
+ while (changes) {
+ this = changes;
+ changes = changes->next;
+ if (llseek(fd,this->pos,0) != this->pos)
+ fprintf(stderr,"Seek to %lld failed: %s\n Did not write %d bytes.\n",
+ (long long)this->pos,strerror(errno),this->size);
+ else if ((size = write(fd,this->data,this->size)) < 0)
+ fprintf(stderr,"Writing %d bytes at %lld failed: %s\n",this->size,
+ (long long)this->pos,strerror(errno));
+ else if (size != this->size)
+ fprintf(stderr,"Wrote %d bytes instead of %d bytes at %lld."
+ "\n",size,this->size,(long long)this->pos);
+ free(this->data);
+ free(this);
+ }
+}
+
+
+int fs_close(int write)
+{
+ CHANGE *next;
+ int changed;
+
+ changed = !!changes;
+ if (write) fs_flush();
+ else while (changes) {
+ next = changes->next;
+ free(changes->data);
+ free(changes);
+ changes = next;
+ }
+ if (close(fd) < 0) pdie("closing file system");
+ return changed || did_change;
+}
+
+
+int fs_changed(void)
+{
+ return !!changes || did_change;
+}
+
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
diff --git a/src/io.h b/src/io.h
new file mode 100644
index 0000000..ba0c35b
--- /dev/null
+++ b/src/io.h
@@ -0,0 +1,71 @@
+/* io.h - Virtual disk input/output
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+
+#ifndef _IO_H
+#define _IO_H
+
+#include <sys/types.h> /* for loff_t */
+
+/* In earlier versions, an own llseek() was used, but glibc lseek() is
+ * sufficient (or even better :) for 64 bit offsets in the meantime */
+#define llseek lseek64
+
+void fs_open(char *path,int rw);
+
+/* Opens the file system PATH. If RW is zero, the file system is opened
+ read-only, otherwise, it is opened read-write. */
+
+void fs_read(loff_t pos,int size,void *data);
+
+/* Reads SIZE bytes starting at POS into DATA. Performs all applicable
+ changes. */
+
+int fs_test(loff_t pos,int size);
+
+/* Returns a non-zero integer if SIZE bytes starting at POS can be read without
+ errors. Otherwise, it returns zero. */
+
+void fs_write(loff_t pos,int size,void *data);
+
+/* If write_immed is non-zero, SIZE bytes are written from DATA to the disk,
+ starting at POS. If write_immed is zero, the change is added to a list in
+ memory. */
+
+int fs_close(int write);
+
+/* Closes the file system, performs all pending changes if WRITE is non-zero
+ and removes the list of changes. Returns a non-zero integer if the file
+ system has been changed since the last fs_open, zero otherwise. */
+
+int fs_changed(void);
+
+/* Determines whether the file system has changed. See fs_close. */
+
+extern unsigned device_no;
+
+/* Major number of device (0 if file) and size (in 512 byte sectors) */
+
+#endif
diff --git a/src/lfn.c b/src/lfn.c
new file mode 100644
index 0000000..b0db160
--- /dev/null
+++ b/src/lfn.c
@@ -0,0 +1,495 @@
+/* lfn.c - Functions for handling VFAT long filenames
+
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <time.h>
+
+#include "common.h"
+#include "io.h"
+#include "dosfsck.h"
+#include "lfn.h"
+#include "file.h"
+
+typedef struct {
+ __u8 id; /* sequence number for slot */
+ __u8 name0_4[10]; /* first 5 characters in name */
+ __u8 attr; /* attribute byte */
+ __u8 reserved; /* always 0 */
+ __u8 alias_checksum; /* checksum for 8.3 alias */
+ __u8 name5_10[12]; /* 6 more characters in name */
+ __u16 start; /* starting cluster number, 0 in long slots */
+ __u8 name11_12[4]; /* last 2 characters in name */
+} LFN_ENT;
+
+#define LFN_ID_START 0x40
+#define LFN_ID_SLOTMASK 0x1f
+
+#define CHARS_PER_LFN 13
+
+/* These modul-global vars represent the state of the LFN parser */
+unsigned char *lfn_unicode = NULL;
+unsigned char lfn_checksum;
+int lfn_slot = -1;
+loff_t *lfn_offsets = NULL;
+int lfn_parts = 0;
+
+static unsigned char fat_uni2esc[64] = {
+ '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
+ 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
+ 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
+ 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
+ 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
+ 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
+ 'u', 'v', 'w', 'x', 'y', 'z', '+', '-'
+};
+
+/* This defines which unicode chars are directly convertable to ISO-8859-1 */
+#define UNICODE_CONVERTABLE(cl,ch) (ch == 0 && (cl < 0x80 || cl >= 0xa0))
+
+/* for maxlen param */
+#define UNTIL_0 INT_MAX
+
+/* Convert name part in 'lfn' from unicode to ASCII */
+#define CNV_THIS_PART(lfn) \
+ ({ \
+ char __part_uni[CHARS_PER_LFN*2]; \
+ copy_lfn_part( __part_uni, lfn ); \
+ cnv_unicode( __part_uni, CHARS_PER_LFN, 0 ); \
+ })
+
+/* Convert name parts collected so far (from previous slots) from unicode to
+ * ASCII */
+#define CNV_PARTS_SO_FAR() \
+ (cnv_unicode( lfn_unicode+(lfn_slot*CHARS_PER_LFN*2), \
+ lfn_parts*CHARS_PER_LFN, 0 ))
+
+/* This function converts an unicode string to a normal ASCII string, assuming
+ * ISO-8859-1 charset. Characters not in 8859-1 are converted to the same
+ * escape notation as used by the kernel, i.e. the uuencode-like ":xxx" */
+static char *cnv_unicode( const unsigned char *uni, int maxlen, int use_q )
+{
+ const unsigned char *up;
+ unsigned char *out, *cp;
+ int len, val;
+
+ for( len = 0, up = uni; (up-uni)/2 < maxlen && (up[0] || up[1]); up += 2 ){
+ if (UNICODE_CONVERTABLE(up[0],up[1]))
+ ++len;
+ else
+ len += 4;
+ }
+ cp = out = use_q ? qalloc( &mem_queue, len+1 ) : alloc( len+1 );
+
+ for( up = uni; (up-uni)/2 < maxlen && (up[0] || up[1]); up += 2 ) {
+ if (UNICODE_CONVERTABLE(up[0],up[1]))
+ *cp++ = up[0];
+ else {
+ /* here the same escape notation is used as in the Linux kernel */
+ *cp++ = ':';
+ val = (up[1] << 8) + up[0];
+ cp[2] = fat_uni2esc[val & 0x3f];
+ val >>= 6;
+ cp[1] = fat_uni2esc[val & 0x3f];
+ val >>= 6;
+ cp[0] = fat_uni2esc[val & 0x3f];
+ cp += 3;
+ }
+ }
+ *cp = 0;
+
+ return( out );
+}
+
+
+static void copy_lfn_part( char *dst, LFN_ENT *lfn )
+{
+ memcpy( dst, lfn->name0_4, 10 );
+ memcpy( dst+10, lfn->name5_10, 12 );
+ memcpy( dst+22, lfn->name11_12, 4 );
+}
+
+
+static void clear_lfn_slots( int start, int end )
+{
+ int i;
+ LFN_ENT empty;
+
+ /* New dir entry is zeroed except first byte, which is set to 0xe5.
+ * This is to avoid that some FAT-reading OSes (not Linux! ;) stop reading
+ * a directory at the first zero entry...
+ */
+ memset( &empty, 0, sizeof(empty) );
+ empty.id = DELETED_FLAG;
+
+ for( i = start; i <= end; ++i ) {
+ fs_write( lfn_offsets[i], sizeof(LFN_ENT), &empty );
+ }
+}
+
+void lfn_reset( void )
+{
+ if (lfn_unicode)
+ free( lfn_unicode );
+ lfn_unicode = NULL;
+ if (lfn_offsets)
+ free( lfn_offsets );
+ lfn_offsets = NULL;
+ lfn_slot = -1;
+}
+
+
+/* This function is only called with de->attr == VFAT_LN_ATTR. It stores part
+ * of the long name. */
+void lfn_add_slot( DIR_ENT *de, loff_t dir_offset )
+{
+ LFN_ENT *lfn = (LFN_ENT *)de;
+ int slot = lfn->id & LFN_ID_SLOTMASK;
+ unsigned offset;
+
+ if (lfn_slot == 0) lfn_check_orphaned();
+
+ if (de->attr != VFAT_LN_ATTR)
+ die("lfn_add_slot called with non-LFN directory entry");
+
+ if (lfn->id & LFN_ID_START && slot != 0) {
+ if (lfn_slot != -1) {
+ int can_clear = 0;
+ /* There is already a LFN "in progess", so it is an error that a
+ * new start entry is here. */
+ /* Causes: 1) if slot# == expected: start bit set mysteriously, 2)
+ * old LFN overwritten by new one */
+ /* Fixes: 1) delete previous LFN 2) if slot# == expected and
+ * checksum ok: clear start bit */
+ /* XXX: Should delay that until next LFN known (then can better
+ * display the name) */
+ printf( "A new long file name starts within an old one.\n" );
+ if (slot == lfn_slot &&
+ lfn->alias_checksum == lfn_checksum) {
+ char *part1 = CNV_THIS_PART(lfn);
+ char *part2 = CNV_PARTS_SO_FAR();
+ printf( " It could be that the LFN start bit is wrong here\n"
+ " if \"%s\" seems to match \"%s\".\n", part1, part2 );
+ free( part1 );
+ free( part2 );
+ can_clear = 1;
+ }
+ if (interactive) {
+ printf( "1: Delete previous LFN\n2: Leave it as it is.\n" );
+ if (can_clear)
+ printf( "3: Clear start bit and concatenate LFNs\n" );
+ }
+ else printf( " Not auto-correcting this.\n" );
+ if (interactive) {
+ switch( get_key( can_clear ? "123" : "12", "?" )) {
+ case '1':
+ clear_lfn_slots( 0, lfn_parts-1 );
+ lfn_reset();
+ break;
+ case '2':
+ break;
+ case '3':
+ lfn->id &= ~LFN_ID_START;
+ fs_write( dir_offset+offsetof(LFN_ENT,id),
+ sizeof(lfn->id), &lfn->id );
+ break;
+ }
+ }
+ }
+ lfn_slot = slot;
+ lfn_checksum = lfn->alias_checksum;
+ lfn_unicode = alloc( (lfn_slot*CHARS_PER_LFN+1)*2 );
+ lfn_offsets = alloc( lfn_slot*sizeof(loff_t) );
+ lfn_parts = 0;
+ }
+ else if (lfn_slot == -1 && slot != 0) {
+ /* No LFN in progress, but slot found; start bit missing */
+ /* Causes: 1) start bit got lost, 2) Previous slot with start bit got
+ * lost */
+ /* Fixes: 1) delete LFN, 2) set start bit */
+ char *part = CNV_THIS_PART(lfn);
+ printf( "Long filename fragment \"%s\" found outside a LFN "
+ "sequence.\n (Maybe the start bit is missing on the "
+ "last fragment)\n", part );
+ if (interactive) {
+ printf( "1: Delete fragment\n2: Leave it as it is.\n"
+ "3: Set start bit\n" );
+ }
+ else printf( " Not auto-correcting this.\n" );
+ switch( interactive ? get_key( "123", "?" ) : '2') {
+ case '1':
+ if (!lfn_offsets)
+ lfn_offsets = alloc( sizeof(loff_t) );
+ lfn_offsets[0] = dir_offset;
+ clear_lfn_slots( 0, 0 );
+ lfn_reset();
+ return;
+ case '2':
+ lfn_reset();
+ return;
+ case '3':
+ lfn->id |= LFN_ID_START;
+ fs_write( dir_offset+offsetof(LFN_ENT,id),
+ sizeof(lfn->id), &lfn->id );
+ lfn_slot = slot;
+ lfn_checksum = lfn->alias_checksum;
+ lfn_unicode = alloc( (lfn_slot*CHARS_PER_LFN+1)*2 );
+ lfn_offsets = alloc( lfn_slot*sizeof(loff_t) );
+ lfn_parts = 0;
+ break;
+ }
+ }
+ else if (slot != lfn_slot) {
+ /* wrong sequence number */
+ /* Causes: 1) seq-no destroyed */
+ /* Fixes: 1) delete LFN, 2) fix number (maybe only if following parts
+ * are ok?, maybe only if checksum is ok?) (Attention: space
+ * for name was allocated before!) */
+ int can_fix = 0;
+ printf( "Unexpected long filename sequence number "
+ "(%d vs. expected %d).\n",
+ slot, lfn_slot );
+ if (lfn->alias_checksum == lfn_checksum && lfn_slot > 0) {
+ char *part1 = CNV_THIS_PART(lfn);
+ char *part2 = CNV_PARTS_SO_FAR();
+ printf( " It could be that just the number is wrong\n"
+ " if \"%s\" seems to match \"%s\".\n", part1, part2 );
+ free( part1 );
+ free( part2 );
+ can_fix = 1;
+ }
+ if (interactive) {
+ printf( "1: Delete LFN\n2: Leave it as it is (and ignore LFN so far)\n" );
+ if (can_fix)
+ printf( "3: Correct sequence number\n" );
+ }
+ else printf( " Not auto-correcting this.\n" );
+ switch( interactive ? get_key( can_fix ? "123" : "12", "?" ) : '2') {
+ case '1':
+ if (!lfn_offsets) {
+ lfn_offsets = alloc( sizeof(loff_t) );
+ lfn_parts = 0;
+ }
+ lfn_offsets[lfn_parts++] = dir_offset;
+ clear_lfn_slots( 0, lfn_parts-1 );
+ lfn_reset();
+ return;
+ case '2':
+ lfn_reset();
+ return;
+ case '3':
+ lfn->id = (lfn->id & ~LFN_ID_SLOTMASK) | lfn_slot;
+ fs_write( dir_offset+offsetof(LFN_ENT,id),
+ sizeof(lfn->id), &lfn->id );
+ break;
+ }
+ }
+
+ if (lfn->alias_checksum != lfn_checksum) {
+ /* checksum mismatch */
+ /* Causes: 1) checksum field here destroyed */
+ /* Fixes: 1) delete LFN, 2) fix checksum */
+ printf( "Checksum in long filename part wrong "
+ "(%02x vs. expected %02x).\n",
+ lfn->alias_checksum, lfn_checksum );
+ if (interactive) {
+ printf( "1: Delete LFN\n2: Leave it as it is.\n"
+ "3: Correct checksum\n" );
+ }
+ else printf( " Not auto-correcting this.\n" );
+ if (interactive) {
+ switch( get_key( "123", "?" )) {
+ case '1':
+ lfn_offsets[lfn_parts++] = dir_offset;
+ clear_lfn_slots( 0, lfn_parts-1 );
+ lfn_reset();
+ return;
+ case '2':
+ break;
+ case '3':
+ lfn->alias_checksum = lfn_checksum;
+ fs_write( dir_offset+offsetof(LFN_ENT,alias_checksum),
+ sizeof(lfn->alias_checksum), &lfn->alias_checksum );
+ break;
+ }
+ }
+ }
+
+ if (lfn_slot != -1) {
+ lfn_slot--;
+ offset = lfn_slot * CHARS_PER_LFN*2;
+ copy_lfn_part( lfn_unicode+offset, lfn );
+ if (lfn->id & LFN_ID_START)
+ lfn_unicode[offset+26] = lfn_unicode[offset+27] = 0;
+ lfn_offsets[lfn_parts++] = dir_offset;
+ }
+
+ if (lfn->reserved != 0) {
+ printf( "Reserved field in VFAT long filename slot is not 0 "
+ "(but 0x%02x).\n", lfn->reserved );
+ if (interactive)
+ printf( "1: Fix.\n2: Leave it.\n" );
+ else printf( "Auto-setting to 0.\n" );
+ if (!interactive || get_key("12","?") == '1') {
+ lfn->reserved = 0;
+ fs_write( dir_offset+offsetof(LFN_ENT,reserved),
+ sizeof(lfn->reserved), &lfn->reserved );
+ }
+ }
+ if (lfn->start != CT_LE_W(0)) {
+ printf( "Start cluster field in VFAT long filename slot is not 0 "
+ "(but 0x%04x).\n", lfn->start );
+ if (interactive)
+ printf( "1: Fix.\n2: Leave it.\n" );
+ else printf( "Auto-setting to 0.\n" );
+ if (!interactive || get_key("12","?") == '1') {
+ lfn->start = CT_LE_W(0);
+ fs_write( dir_offset+offsetof(LFN_ENT,start),
+ sizeof(lfn->start),&lfn->start );
+ }
+ }
+}
+
+
+/* This function is always called when de->attr != VFAT_LN_ATTR is found, to
+ * retrieve the previously constructed LFN. */
+char *lfn_get( DIR_ENT *de )
+{
+ char *lfn;
+ __u8 sum;
+ int i;
+
+ if (de->attr == VFAT_LN_ATTR)
+ die("lfn_get called with LFN directory entry");
+
+#if 0
+ if (de->lcase)
+ printf( "lcase=%02x\n",de->lcase );
+#endif
+
+ if (lfn_slot == -1)
+ /* no long name for this file */
+ return NULL;
+
+ if (lfn_slot != 0) {
+ /* The long name isn't finished yet. */
+ /* Causes: 1) LFN slot overwritten by non-VFAT aware tool */
+ /* Fixes: 1) delete LFN 2) move overwriting entry to somewhere else
+ * and let user enter missing part of LFN (hard to do :-()
+ * 3) renumber entries and truncate name */
+ char *long_name = CNV_PARTS_SO_FAR();
+ char *short_name = file_name(de->name);
+ printf( "Unfinished long file name \"%s\".\n"
+ " (Start may have been overwritten by %s)\n",
+ long_name, short_name );
+ free( long_name );
+ if (interactive) {
+ printf( "1: Delete LFN\n2: Leave it as it is.\n"
+ "3: Fix numbering (truncates long name and attaches "
+ "it to short name %s)\n", short_name );
+ }
+ else printf( " Not auto-correcting this.\n" );
+ switch( interactive ? get_key( "123", "?" ) : '2') {
+ case '1':
+ clear_lfn_slots( 0, lfn_parts-1 );
+ lfn_reset();
+ return NULL;
+ case '2':
+ lfn_reset();
+ return NULL;
+ case '3':
+ for( i = 0; i < lfn_parts; ++i ) {
+ __u8 id = (lfn_parts-i) | (i==0 ? LFN_ID_START : 0);
+ fs_write( lfn_offsets[i]+offsetof(LFN_ENT,id),
+ sizeof(id), &id );
+ }
+ memmove( lfn_unicode, lfn_unicode+lfn_slot*CHARS_PER_LFN*2,
+ lfn_parts*CHARS_PER_LFN*2 );
+ break;
+ }
+ }
+
+ for (sum = 0, i = 0; i < 11; i++)
+ sum = (((sum&1) << 7) | ((sum&0xfe) >> 1)) + de->name[i];
+ if (sum != lfn_checksum) {
+ /* checksum doesn't match, long name doesn't apply to this alias */
+ /* Causes: 1) alias renamed */
+ /* Fixes: 1) Fix checksum in LFN entries */
+ char *long_name = CNV_PARTS_SO_FAR();
+ char *short_name = file_name(de->name);
+ printf( "Wrong checksum for long file name \"%s\".\n"
+ " (Short name %s may have changed without updating the long name)\n",
+ long_name, short_name );
+ free( long_name );
+ if (interactive) {
+ printf( "1: Delete LFN\n2: Leave it as it is.\n"
+ "3: Fix checksum (attaches to short name %s)\n",
+ short_name );
+ }
+ else printf( " Not auto-correcting this.\n" );
+ if (interactive) {
+ switch( get_key( "123", "?" )) {
+ case '1':
+ clear_lfn_slots( 0, lfn_parts-1 );
+ lfn_reset();
+ return NULL;
+ case '2':
+ lfn_reset();
+ return NULL;
+ case '3':
+ for( i = 0; i < lfn_parts; ++i ) {
+ fs_write( lfn_offsets[i]+offsetof(LFN_ENT,alias_checksum),
+ sizeof(sum), &sum );
+ }
+ break;
+ }
+ }
+ }
+
+ lfn = cnv_unicode( lfn_unicode, UNTIL_0, 1 );
+ lfn_reset();
+ return( lfn );
+}
+
+void lfn_check_orphaned(void)
+{
+ char *long_name;
+
+ if (lfn_slot == -1)
+ return;
+
+ long_name = CNV_PARTS_SO_FAR();
+ printf("Orphaned long file name part \"%s\"\n", long_name);
+ if (interactive)
+ printf( "1: Delete.\n2: Leave it.\n" );
+ else printf( " Auto-deleting.\n" );
+ if (!interactive || get_key("12","?") == '1') {
+ clear_lfn_slots(0, lfn_parts - 1);
+ }
+ lfn_reset();
+}
+
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
diff --git a/src/lfn.h b/src/lfn.h
new file mode 100644
index 0000000..8e8f5a1
--- /dev/null
+++ b/src/lfn.h
@@ -0,0 +1,36 @@
+/* lfn.h - Functions for handling VFAT long filenames
+
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#ifndef _LFN_H
+#define _LFN_H
+
+void lfn_reset( void );
+/* Reset the state of the LFN parser. */
+
+void lfn_add_slot( DIR_ENT *de, loff_t dir_offset );
+/* Process a dir slot that is a VFAT LFN entry. */
+
+char *lfn_get( DIR_ENT *de );
+/* Retrieve the long name for the proper dir entry. */
+
+void lfn_check_orphaned(void);
+
+#endif
diff --git a/src/mkdosfs.c b/src/mkdosfs.c
new file mode 100644
index 0000000..1264efd
--- /dev/null
+++ b/src/mkdosfs.c
@@ -0,0 +1,1761 @@
+/* mkdosfs.c - utility to create FAT/MS-DOS filesystems
+
+ Copyright (C) 1991 Linus Torvalds <torvalds@klaava.helsinki.fi>
+ Copyright (C) 1992-1993 Remy Card <card@masi.ibp.fr>
+ Copyright (C) 1993-1994 David Hudson <dave@humbug.demon.co.uk>
+ Copyright (C) 1998 H. Peter Anvin <hpa@zytor.com>
+ Copyright (C) 1998-2005 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* Description: Utility to allow an MS-DOS filesystem to be created
+ under Linux. A lot of the basic structure of this program has been
+ borrowed from Remy Card's "mke2fs" code.
+
+ As far as possible the aim here is to make the "mkdosfs" command
+ look almost identical to the other Linux filesystem make utilties,
+ eg bad blocks are still specified as blocks, not sectors, but when
+ it comes down to it, DOS is tied to the idea of a sector (512 bytes
+ as a rule), and not the block. For example the boot block does not
+ occupy a full cluster.
+
+ Fixes/additions May 1998 by Roman Hodek
+ <Roman.Hodek@informatik.uni-erlangen.de>:
+ - Atari format support
+ - New options -A, -S, -C
+ - Support for filesystems > 2GB
+ - FAT32 support */
+
+/* Include the header files */
+
+#include "version.h"
+
+#include <fcntl.h>
+#include <linux/hdreg.h>
+#include <sys/mount.h>
+#include <linux/fd.h>
+#include <endian.h>
+#include <mntent.h>
+#include <signal.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <time.h>
+#include <errno.h>
+
+# include <asm/types.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+
+#include <asm/byteorder.h>
+#ifdef __le16_to_cpu
+/* ++roman: 2.1 kernel headers define these function, they're probably more
+ * efficient then coding the swaps machine-independently. */
+#define CF_LE_W __le16_to_cpu
+#define CF_LE_L __le32_to_cpu
+#define CT_LE_W __cpu_to_le16
+#define CT_LE_L __cpu_to_le32
+#else
+#define CF_LE_W(v) ((((v) & 0xff) << 8) | (((v) >> 8) & 0xff))
+#define CF_LE_L(v) (((unsigned)(v)>>24) | (((unsigned)(v)>>8)&0xff00) | \
+ (((unsigned)(v)<<8)&0xff0000) | ((unsigned)(v)<<24))
+#define CT_LE_W(v) CF_LE_W(v)
+#define CT_LE_L(v) CF_LE_L(v)
+#endif /* defined(__le16_to_cpu) */
+
+#else
+
+#define CF_LE_W(v) (v)
+#define CF_LE_L(v) (v)
+#define CT_LE_W(v) (v)
+#define CT_LE_L(v) (v)
+
+#endif /* __BIG_ENDIAN */
+
+/* In earlier versions, an own llseek() was used, but glibc lseek() is
+ * sufficient (or even better :) for 64 bit offsets in the meantime */
+#define llseek lseek
+
+/* Constant definitions */
+
+#define TRUE 1 /* Boolean constants */
+#define FALSE 0
+
+#define TEST_BUFFER_BLOCKS 16
+#define HARD_SECTOR_SIZE 512
+#define SECTORS_PER_BLOCK ( BLOCK_SIZE / HARD_SECTOR_SIZE )
+
+
+/* Macro definitions */
+
+/* Report a failure message and return a failure error code */
+
+#define die( str ) fatal_error( "%s: " str "\n" )
+
+
+/* Mark a cluster in the FAT as bad */
+
+#define mark_sector_bad( sector ) mark_FAT_sector( sector, FAT_BAD )
+
+/* Compute ceil(a/b) */
+
+inline int
+cdiv (int a, int b)
+{
+ return (a + b - 1) / b;
+}
+
+/* MS-DOS filesystem structures -- I included them here instead of
+ including linux/msdos_fs.h since that doesn't include some fields we
+ need */
+
+#define ATTR_RO 1 /* read-only */
+#define ATTR_HIDDEN 2 /* hidden */
+#define ATTR_SYS 4 /* system */
+#define ATTR_VOLUME 8 /* volume label */
+#define ATTR_DIR 16 /* directory */
+#define ATTR_ARCH 32 /* archived */
+
+#define ATTR_NONE 0 /* no attribute bits */
+#define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
+ /* attribute bits that are copied "as is" */
+
+/* FAT values */
+#define FAT_EOF (atari_format ? 0x0fffffff : 0x0ffffff8)
+#define FAT_BAD 0x0ffffff7
+
+#define MSDOS_EXT_SIGN 0x29 /* extended boot sector signature */
+#define MSDOS_FAT12_SIGN "FAT12 " /* FAT12 filesystem signature */
+#define MSDOS_FAT16_SIGN "FAT16 " /* FAT16 filesystem signature */
+#define MSDOS_FAT32_SIGN "FAT32 " /* FAT32 filesystem signature */
+
+#define BOOT_SIGN 0xAA55 /* Boot sector magic number */
+
+#define MAX_CLUST_12 ((1 << 12) - 16)
+#define MAX_CLUST_16 ((1 << 16) - 16)
+#define MIN_CLUST_32 65529
+/* M$ says the high 4 bits of a FAT32 FAT entry are reserved and don't belong
+ * to the cluster number. So the max. cluster# is based on 2^28 */
+#define MAX_CLUST_32 ((1 << 28) - 16)
+
+#define FAT12_THRESHOLD 4085
+
+#define OLDGEMDOS_MAX_SECTORS 32765
+#define GEMDOS_MAX_SECTORS 65531
+#define GEMDOS_MAX_SECTOR_SIZE (16*1024)
+
+#define BOOTCODE_SIZE 448
+#define BOOTCODE_FAT32_SIZE 420
+
+/* __attribute__ ((packed)) is used on all structures to make gcc ignore any
+ * alignments */
+
+struct msdos_volume_info {
+ __u8 drive_number; /* BIOS drive number */
+ __u8 RESERVED; /* Unused */
+ __u8 ext_boot_sign; /* 0x29 if fields below exist (DOS 3.3+) */
+ __u8 volume_id[4]; /* Volume ID number */
+ __u8 volume_label[11];/* Volume label */
+ __u8 fs_type[8]; /* Typically FAT12 or FAT16 */
+} __attribute__ ((packed));
+
+struct msdos_boot_sector
+{
+ __u8 boot_jump[3]; /* Boot strap short or near jump */
+ __u8 system_id[8]; /* Name - can be used to special case
+ partition manager volumes */
+ __u8 sector_size[2]; /* bytes per logical sector */
+ __u8 cluster_size; /* sectors/cluster */
+ __u16 reserved; /* reserved sectors */
+ __u8 fats; /* number of FATs */
+ __u8 dir_entries[2]; /* root directory entries */
+ __u8 sectors[2]; /* number of sectors */
+ __u8 media; /* media code (unused) */
+ __u16 fat_length; /* sectors/FAT */
+ __u16 secs_track; /* sectors per track */
+ __u16 heads; /* number of heads */
+ __u32 hidden; /* hidden sectors (unused) */
+ __u32 total_sect; /* number of sectors (if sectors == 0) */
+ union {
+ struct {
+ struct msdos_volume_info vi;
+ __u8 boot_code[BOOTCODE_SIZE];
+ } __attribute__ ((packed)) _oldfat;
+ struct {
+ __u32 fat32_length; /* sectors/FAT */
+ __u16 flags; /* bit 8: fat mirroring, low 4: active fat */
+ __u8 version[2]; /* major, minor filesystem version */
+ __u32 root_cluster; /* first cluster in root directory */
+ __u16 info_sector; /* filesystem info sector */
+ __u16 backup_boot; /* backup boot sector */
+ __u16 reserved2[6]; /* Unused */
+ struct msdos_volume_info vi;
+ __u8 boot_code[BOOTCODE_FAT32_SIZE];
+ } __attribute__ ((packed)) _fat32;
+ } __attribute__ ((packed)) fstype;
+ __u16 boot_sign;
+} __attribute__ ((packed));
+#define fat32 fstype._fat32
+#define oldfat fstype._oldfat
+
+struct fat32_fsinfo {
+ __u32 reserved1; /* Nothing as far as I can tell */
+ __u32 signature; /* 0x61417272L */
+ __u32 free_clusters; /* Free cluster count. -1 if unknown */
+ __u32 next_cluster; /* Most recently allocated cluster.
+ * Unused under Linux. */
+ __u32 reserved2[4];
+};
+
+struct msdos_dir_entry
+ {
+ char name[8], ext[3]; /* name and extension */
+ __u8 attr; /* attribute bits */
+ __u8 lcase; /* Case for base and extension */
+ __u8 ctime_ms; /* Creation time, milliseconds */
+ __u16 ctime; /* Creation time */
+ __u16 cdate; /* Creation date */
+ __u16 adate; /* Last access date */
+ __u16 starthi; /* high 16 bits of first cl. (FAT32) */
+ __u16 time, date, start; /* time, date and first cluster */
+ __u32 size; /* file size (in bytes) */
+ } __attribute__ ((packed));
+
+/* The "boot code" we put into the filesystem... it writes a message and
+ tells the user to try again */
+
+char dummy_boot_jump[3] = { 0xeb, 0x3c, 0x90 };
+
+char dummy_boot_jump_m68k[2] = { 0x60, 0x1c };
+
+#define MSG_OFFSET_OFFSET 3
+char dummy_boot_code[BOOTCODE_SIZE] =
+ "\x0e" /* push cs */
+ "\x1f" /* pop ds */
+ "\xbe\x5b\x7c" /* mov si, offset message_txt */
+ /* write_msg: */
+ "\xac" /* lodsb */
+ "\x22\xc0" /* and al, al */
+ "\x74\x0b" /* jz key_press */
+ "\x56" /* push si */
+ "\xb4\x0e" /* mov ah, 0eh */
+ "\xbb\x07\x00" /* mov bx, 0007h */
+ "\xcd\x10" /* int 10h */
+ "\x5e" /* pop si */
+ "\xeb\xf0" /* jmp write_msg */
+ /* key_press: */
+ "\x32\xe4" /* xor ah, ah */
+ "\xcd\x16" /* int 16h */
+ "\xcd\x19" /* int 19h */
+ "\xeb\xfe" /* foo: jmp foo */
+ /* message_txt: */
+
+ "This is not a bootable disk. Please insert a bootable floppy and\r\n"
+ "press any key to try again ... \r\n";
+
+#define MESSAGE_OFFSET 29 /* Offset of message in above code */
+
+/* Global variables - the root of all evil :-) - see these and weep! */
+
+static char *program_name = "mkdosfs"; /* Name of the program */
+static char *device_name = NULL; /* Name of the device on which to create the filesystem */
+static int atari_format = 0; /* Use Atari variation of MS-DOS FS format */
+static int check = FALSE; /* Default to no readablity checking */
+static int verbose = 0; /* Default to verbose mode off */
+static long volume_id; /* Volume ID number */
+static time_t create_time; /* Creation time */
+static struct timeval create_timeval; /* Creation time */
+static char volume_name[] = " "; /* Volume name */
+static unsigned long long blocks; /* Number of blocks in filesystem */
+static int sector_size = 512; /* Size of a logical sector */
+static int sector_size_set = 0; /* User selected sector size */
+static int backup_boot = 0; /* Sector# of backup boot sector */
+static int reserved_sectors = 0;/* Number of reserved sectors */
+static int badblocks = 0; /* Number of bad blocks in the filesystem */
+static int nr_fats = 2; /* Default number of FATs to produce */
+static int size_fat = 0; /* Size in bits of FAT entries */
+static int size_fat_by_user = 0; /* 1 if FAT size user selected */
+static int dev = -1; /* FS block device file handle */
+static int ignore_full_disk = 0; /* Ignore warning about 'full' disk devices */
+static off_t currently_testing = 0; /* Block currently being tested (if autodetect bad blocks) */
+static struct msdos_boot_sector bs; /* Boot sector data */
+static int start_data_sector; /* Sector number for the start of the data area */
+static int start_data_block; /* Block number for the start of the data area */
+static unsigned char *fat; /* File allocation table */
+static unsigned char *info_sector; /* FAT32 info sector */
+static struct msdos_dir_entry *root_dir; /* Root directory */
+static int size_root_dir; /* Size of the root directory in bytes */
+static int sectors_per_cluster = 0; /* Number of sectors per disk cluster */
+static int root_dir_entries = 0; /* Number of root directory entries */
+static char *blank_sector; /* Blank sector - all zeros */
+static int hidden_sectors = 0; /* Number of hidden sectors */
+
+
+/* Function prototype definitions */
+
+static void fatal_error (const char *fmt_string) __attribute__((noreturn));
+static void mark_FAT_cluster (int cluster, unsigned int value);
+static void mark_FAT_sector (int sector, unsigned int value);
+static long do_check (char *buffer, int try, off_t current_block);
+static void alarm_intr (int alnum);
+static void check_blocks (void);
+static void get_list_blocks (char *filename);
+static int valid_offset (int fd, loff_t offset);
+static unsigned long long count_blocks (char *filename);
+static void check_mount (char *device_name);
+static void establish_params (int device_num, int size);
+static void setup_tables (void);
+static void write_tables (void);
+
+
+/* The function implementations */
+
+/* Handle the reporting of fatal errors. Volatile to let gcc know that this doesn't return */
+
+static void
+fatal_error (const char *fmt_string)
+{
+ fprintf (stderr, fmt_string, program_name, device_name);
+ exit (1); /* The error exit code is 1! */
+}
+
+
+/* Mark the specified cluster as having a particular value */
+
+static void
+mark_FAT_cluster (int cluster, unsigned int value)
+{
+ switch( size_fat ) {
+ case 12:
+ value &= 0x0fff;
+ if (((cluster * 3) & 0x1) == 0)
+ {
+ fat[3 * cluster / 2] = (unsigned char) (value & 0x00ff);
+ fat[(3 * cluster / 2) + 1] = (unsigned char) ((fat[(3 * cluster / 2) + 1] & 0x00f0)
+ | ((value & 0x0f00) >> 8));
+ }
+ else
+ {
+ fat[3 * cluster / 2] = (unsigned char) ((fat[3 * cluster / 2] & 0x000f) | ((value & 0x000f) << 4));
+ fat[(3 * cluster / 2) + 1] = (unsigned char) ((value & 0x0ff0) >> 4);
+ }
+ break;
+
+ case 16:
+ value &= 0xffff;
+ fat[2 * cluster] = (unsigned char) (value & 0x00ff);
+ fat[(2 * cluster) + 1] = (unsigned char) (value >> 8);
+ break;
+
+ case 32:
+ value &= 0xfffffff;
+ fat[4 * cluster] = (unsigned char) (value & 0x000000ff);
+ fat[(4 * cluster) + 1] = (unsigned char) ((value & 0x0000ff00) >> 8);
+ fat[(4 * cluster) + 2] = (unsigned char) ((value & 0x00ff0000) >> 16);
+ fat[(4 * cluster) + 3] = (unsigned char) ((value & 0xff000000) >> 24);
+ break;
+
+ default:
+ die("Bad FAT size (not 12, 16, or 32)");
+ }
+}
+
+
+/* Mark a specified sector as having a particular value in it's FAT entry */
+
+static void
+mark_FAT_sector (int sector, unsigned int value)
+{
+ int cluster;
+
+ cluster = (sector - start_data_sector) / (int) (bs.cluster_size) /
+ (sector_size/HARD_SECTOR_SIZE);
+ if (cluster < 0)
+ die ("Invalid cluster number in mark_FAT_sector: probably bug!");
+
+ mark_FAT_cluster (cluster, value);
+}
+
+
+/* Perform a test on a block. Return the number of blocks that could be read successfully */
+
+static long
+do_check (char *buffer, int try, off_t current_block)
+{
+ long got;
+
+ if (llseek (dev, current_block * BLOCK_SIZE, SEEK_SET) /* Seek to the correct location */
+ != current_block * BLOCK_SIZE)
+ die ("seek failed during testing for blocks");
+
+ got = read (dev, buffer, try * BLOCK_SIZE); /* Try reading! */
+ if (got < 0)
+ got = 0;
+
+ if (got & (BLOCK_SIZE - 1))
+ printf ("Unexpected values in do_check: probably bugs\n");
+ got /= BLOCK_SIZE;
+
+ return got;
+}
+
+
+/* Alarm clock handler - display the status of the quest for bad blocks! Then retrigger the alarm for five senconds
+ later (so we can come here again) */
+
+static void
+alarm_intr (int alnum)
+{
+ if (currently_testing >= blocks)
+ return;
+
+ signal (SIGALRM, alarm_intr);
+ alarm (5);
+ if (!currently_testing)
+ return;
+
+ printf ("%lld... ", (unsigned long long)currently_testing);
+ fflush (stdout);
+}
+
+
+static void
+check_blocks (void)
+{
+ int try, got;
+ int i;
+ static char blkbuf[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
+
+ if (verbose)
+ {
+ printf ("Searching for bad blocks ");
+ fflush (stdout);
+ }
+ currently_testing = 0;
+ if (verbose)
+ {
+ signal (SIGALRM, alarm_intr);
+ alarm (5);
+ }
+ try = TEST_BUFFER_BLOCKS;
+ while (currently_testing < blocks)
+ {
+ if (currently_testing + try > blocks)
+ try = blocks - currently_testing;
+ got = do_check (blkbuf, try, currently_testing);
+ currently_testing += got;
+ if (got == try)
+ {
+ try = TEST_BUFFER_BLOCKS;
+ continue;
+ }
+ else
+ try = 1;
+ if (currently_testing < start_data_block)
+ die ("bad blocks before data-area: cannot make fs");
+
+ for (i = 0; i < SECTORS_PER_BLOCK; i++) /* Mark all of the sectors in the block as bad */
+ mark_sector_bad (currently_testing * SECTORS_PER_BLOCK + i);
+ badblocks++;
+ currently_testing++;
+ }
+
+ if (verbose)
+ printf ("\n");
+
+ if (badblocks)
+ printf ("%d bad block%s\n", badblocks,
+ (badblocks > 1) ? "s" : "");
+}
+
+
+static void
+get_list_blocks (char *filename)
+{
+ int i;
+ FILE *listfile;
+ unsigned long blockno;
+
+ listfile = fopen (filename, "r");
+ if (listfile == (FILE *) NULL)
+ die ("Can't open file of bad blocks");
+
+ while (!feof (listfile))
+ {
+ fscanf (listfile, "%ld\n", &blockno);
+ for (i = 0; i < SECTORS_PER_BLOCK; i++) /* Mark all of the sectors in the block as bad */
+ mark_sector_bad (blockno * SECTORS_PER_BLOCK + i);
+ badblocks++;
+ }
+ fclose (listfile);
+
+ if (badblocks)
+ printf ("%d bad block%s\n", badblocks,
+ (badblocks > 1) ? "s" : "");
+}
+
+
+/* Given a file descriptor and an offset, check whether the offset is a valid offset for the file - return FALSE if it
+ isn't valid or TRUE if it is */
+
+static int
+valid_offset (int fd, loff_t offset)
+{
+ char ch;
+
+ if (llseek (fd, offset, SEEK_SET) < 0)
+ return FALSE;
+ if (read (fd, &ch, 1) < 1)
+ return FALSE;
+ return TRUE;
+}
+
+
+/* Given a filename, look to see how many blocks of BLOCK_SIZE are present, returning the answer */
+
+static unsigned long long
+count_blocks (char *filename)
+{
+ off_t high, low;
+ int fd;
+
+ if ((fd = open (filename, O_RDONLY)) < 0)
+ {
+ perror (filename);
+ exit (1);
+ }
+
+ /* first try SEEK_END, which should work on most devices nowadays */
+ if ((low = llseek(fd, 0, SEEK_END)) <= 0) {
+ low = 0;
+ for (high = 1; valid_offset (fd, high); high *= 2)
+ low = high;
+ while (low < high - 1) {
+ const loff_t mid = (low + high) / 2;
+ if (valid_offset (fd, mid))
+ low = mid;
+ else
+ high = mid;
+ }
+ ++low;
+ }
+
+ close (fd);
+ return low / BLOCK_SIZE;
+}
+
+
+/* Check to see if the specified device is currently mounted - abort if it is */
+
+static void
+check_mount (char *device_name)
+{
+ FILE *f;
+ struct mntent *mnt;
+
+ if ((f = setmntent (MOUNTED, "r")) == NULL)
+ return;
+ while ((mnt = getmntent (f)) != NULL)
+ if (strcmp (device_name, mnt->mnt_fsname) == 0)
+ die ("%s contains a mounted file system.");
+ endmntent (f);
+}
+
+
+/* Establish the geometry and media parameters for the device */
+
+static void
+establish_params (int device_num,int size)
+{
+ long loop_size;
+ struct hd_geometry geometry;
+ struct floppy_struct param;
+
+ if ((0 == device_num) || ((device_num & 0xff00) == 0x0200))
+ /* file image or floppy disk */
+ {
+ if (0 == device_num)
+ {
+ param.size = size/512;
+ switch(param.size)
+ {
+ case 720:
+ param.sect = 9 ;
+ param.head = 2;
+ break;
+ case 1440:
+ param.sect = 9;
+ param.head = 2;
+ break;
+ case 2400:
+ param.sect = 15;
+ param.head = 2;
+ break;
+ case 2880:
+ param.sect = 18;
+ param.head = 2;
+ break;
+ case 5760:
+ param.sect = 36;
+ param.head = 2;
+ break;
+ default:
+ /* fake values */
+ param.sect = 32;
+ param.head = 64;
+ break;
+ }
+
+ }
+ else /* is a floppy diskette */
+ {
+ if (ioctl (dev, FDGETPRM, &param)) /* Can we get the diskette geometry? */
+ die ("unable to get diskette geometry for '%s'");
+ }
+ bs.secs_track = CT_LE_W(param.sect); /* Set up the geometry information */
+ bs.heads = CT_LE_W(param.head);
+ switch (param.size) /* Set up the media descriptor byte */
+ {
+ case 720: /* 5.25", 2, 9, 40 - 360K */
+ bs.media = (char) 0xfd;
+ bs.cluster_size = (char) 2;
+ bs.dir_entries[0] = (char) 112;
+ bs.dir_entries[1] = (char) 0;
+ break;
+
+ case 1440: /* 3.5", 2, 9, 80 - 720K */
+ bs.media = (char) 0xf9;
+ bs.cluster_size = (char) 2;
+ bs.dir_entries[0] = (char) 112;
+ bs.dir_entries[1] = (char) 0;
+ break;
+
+ case 2400: /* 5.25", 2, 15, 80 - 1200K */
+ bs.media = (char) 0xf9;
+ bs.cluster_size = (char)(atari_format ? 2 : 1);
+ bs.dir_entries[0] = (char) 224;
+ bs.dir_entries[1] = (char) 0;
+ break;
+
+ case 5760: /* 3.5", 2, 36, 80 - 2880K */
+ bs.media = (char) 0xf0;
+ bs.cluster_size = (char) 2;
+ bs.dir_entries[0] = (char) 224;
+ bs.dir_entries[1] = (char) 0;
+ break;
+
+ case 2880: /* 3.5", 2, 18, 80 - 1440K */
+ floppy_default:
+ bs.media = (char) 0xf0;
+ bs.cluster_size = (char)(atari_format ? 2 : 1);
+ bs.dir_entries[0] = (char) 224;
+ bs.dir_entries[1] = (char) 0;
+ break;
+
+ default: /* Anything else */
+ if (0 == device_num)
+ goto def_hd_params;
+ else
+ goto floppy_default;
+ }
+ }
+ else if ((device_num & 0xff00) == 0x0700) /* This is a loop device */
+ {
+ if (ioctl (dev, BLKGETSIZE, &loop_size))
+ die ("unable to get loop device size");
+
+ switch (loop_size) /* Assuming the loop device -> floppy later */
+ {
+ case 720: /* 5.25", 2, 9, 40 - 360K */
+ bs.secs_track = CF_LE_W(9);
+ bs.heads = CF_LE_W(2);
+ bs.media = (char) 0xfd;
+ bs.cluster_size = (char) 2;
+ bs.dir_entries[0] = (char) 112;
+ bs.dir_entries[1] = (char) 0;
+ break;
+
+ case 1440: /* 3.5", 2, 9, 80 - 720K */
+ bs.secs_track = CF_LE_W(9);
+ bs.heads = CF_LE_W(2);
+ bs.media = (char) 0xf9;
+ bs.cluster_size = (char) 2;
+ bs.dir_entries[0] = (char) 112;
+ bs.dir_entries[1] = (char) 0;
+ break;
+
+ case 2400: /* 5.25", 2, 15, 80 - 1200K */
+ bs.secs_track = CF_LE_W(15);
+ bs.heads = CF_LE_W(2);
+ bs.media = (char) 0xf9;
+ bs.cluster_size = (char)(atari_format ? 2 : 1);
+ bs.dir_entries[0] = (char) 224;
+ bs.dir_entries[1] = (char) 0;
+ break;
+
+ case 5760: /* 3.5", 2, 36, 80 - 2880K */
+ bs.secs_track = CF_LE_W(36);
+ bs.heads = CF_LE_W(2);
+ bs.media = (char) 0xf0;
+ bs.cluster_size = (char) 2;
+ bs.dir_entries[0] = (char) 224;
+ bs.dir_entries[1] = (char) 0;
+ break;
+
+ case 2880: /* 3.5", 2, 18, 80 - 1440K */
+ bs.secs_track = CF_LE_W(18);
+ bs.heads = CF_LE_W(2);
+ bs.media = (char) 0xf0;
+ bs.cluster_size = (char)(atari_format ? 2 : 1);
+ bs.dir_entries[0] = (char) 224;
+ bs.dir_entries[1] = (char) 0;
+ break;
+
+ default: /* Anything else: default hd setup */
+ printf("Loop device does not match a floppy size, using "
+ "default hd params\n");
+ bs.secs_track = CT_LE_W(32); /* these are fake values... */
+ bs.heads = CT_LE_W(64);
+ goto def_hd_params;
+ }
+ }
+ else
+ /* Must be a hard disk then! */
+ {
+ /* Can we get the drive geometry? (Note I'm not too sure about */
+ /* whether to use HDIO_GETGEO or HDIO_REQ) */
+ if (ioctl (dev, HDIO_GETGEO, &geometry) || geometry.sectors == 0 || geometry.heads == 0) {
+ printf ("unable to get drive geometry, using default 255/63\n");
+ bs.secs_track = CT_LE_W(63);
+ bs.heads = CT_LE_W(255);
+ }
+ else {
+ bs.secs_track = CT_LE_W(geometry.sectors); /* Set up the geometry information */
+ bs.heads = CT_LE_W(geometry.heads);
+ }
+ def_hd_params:
+ bs.media = (char) 0xf8; /* Set up the media descriptor for a hard drive */
+ bs.dir_entries[0] = (char) 0; /* Default to 512 entries */
+ bs.dir_entries[1] = (char) 2;
+ if (!size_fat && blocks*SECTORS_PER_BLOCK > 1064960) {
+ if (verbose) printf("Auto-selecting FAT32 for large filesystem\n");
+ size_fat = 32;
+ }
+ if (size_fat == 32) {
+ /* For FAT32, try to do the same as M$'s format command
+ * (see http://www.win.tue.nl/~aeb/linux/fs/fat/fatgen103.pdf p. 20):
+ * fs size <= 260M: 0.5k clusters
+ * fs size <= 8G: 4k clusters
+ * fs size <= 16G: 8k clusters
+ * fs size > 16G: 16k clusters
+ */
+ unsigned long sz_mb =
+ (blocks+(1<<(20-BLOCK_SIZE_BITS))-1) >> (20-BLOCK_SIZE_BITS);
+ bs.cluster_size = sz_mb > 16*1024 ? 32 :
+ sz_mb > 8*1024 ? 16 :
+ sz_mb > 260 ? 8 :
+ 1;
+ }
+ else {
+ /* FAT12 and FAT16: start at 4 sectors per cluster */
+ bs.cluster_size = (char) 4;
+ }
+ }
+}
+
+
+/* Create the filesystem data tables */
+
+static void
+setup_tables (void)
+{
+ unsigned num_sectors;
+ unsigned cluster_count = 0, fat_length;
+ unsigned fatdata; /* Sectors for FATs + data area */
+ struct tm *ctime;
+ struct msdos_volume_info *vi = (size_fat == 32 ? &bs.fat32.vi : &bs.oldfat.vi);
+
+ if (atari_format)
+ /* On Atari, the first few bytes of the boot sector are assigned
+ * differently: The jump code is only 2 bytes (and m68k machine code
+ * :-), then 6 bytes filler (ignored), then 3 byte serial number. */
+ memcpy( bs.system_id-1, "mkdosf", 6 );
+ else
+ strcpy (bs.system_id, "mkdosfs");
+ if (sectors_per_cluster)
+ bs.cluster_size = (char) sectors_per_cluster;
+ if (size_fat == 32)
+ {
+ /* Under FAT32, the root dir is in a cluster chain, and this is
+ * signalled by bs.dir_entries being 0. */
+ bs.dir_entries[0] = bs.dir_entries[1] = (char) 0;
+ root_dir_entries = 0;
+ }
+ else if (root_dir_entries)
+ {
+ /* Override default from establish_params() */
+ bs.dir_entries[0] = (char) (root_dir_entries & 0x00ff);
+ bs.dir_entries[1] = (char) ((root_dir_entries & 0xff00) >> 8);
+ }
+ else
+ root_dir_entries = bs.dir_entries[0] + (bs.dir_entries[1] << 8);
+
+ if (atari_format) {
+ bs.system_id[5] = (unsigned char) (volume_id & 0x000000ff);
+ bs.system_id[6] = (unsigned char) ((volume_id & 0x0000ff00) >> 8);
+ bs.system_id[7] = (unsigned char) ((volume_id & 0x00ff0000) >> 16);
+ }
+ else {
+ vi->volume_id[0] = (unsigned char) (volume_id & 0x000000ff);
+ vi->volume_id[1] = (unsigned char) ((volume_id & 0x0000ff00) >> 8);
+ vi->volume_id[2] = (unsigned char) ((volume_id & 0x00ff0000) >> 16);
+ vi->volume_id[3] = (unsigned char) (volume_id >> 24);
+ }
+
+ if (!atari_format) {
+ memcpy(vi->volume_label, volume_name, 11);
+
+ memcpy(bs.boot_jump, dummy_boot_jump, 3);
+ /* Patch in the correct offset to the boot code */
+ bs.boot_jump[1] = ((size_fat == 32 ?
+ (char *)&bs.fat32.boot_code :
+ (char *)&bs.oldfat.boot_code) -
+ (char *)&bs) - 2;
+
+ if (size_fat == 32) {
+ int offset = (char *)&bs.fat32.boot_code -
+ (char *)&bs + MESSAGE_OFFSET + 0x7c00;
+ if (dummy_boot_code[BOOTCODE_FAT32_SIZE-1])
+ printf ("Warning: message too long; truncated\n");
+ dummy_boot_code[BOOTCODE_FAT32_SIZE-1] = 0;
+ memcpy(bs.fat32.boot_code, dummy_boot_code, BOOTCODE_FAT32_SIZE);
+ bs.fat32.boot_code[MSG_OFFSET_OFFSET] = offset & 0xff;
+ bs.fat32.boot_code[MSG_OFFSET_OFFSET+1] = offset >> 8;
+ }
+ else {
+ memcpy(bs.oldfat.boot_code, dummy_boot_code, BOOTCODE_SIZE);
+ }
+ bs.boot_sign = CT_LE_W(BOOT_SIGN);
+ }
+ else {
+ memcpy(bs.boot_jump, dummy_boot_jump_m68k, 2);
+ }
+ if (verbose >= 2)
+ printf( "Boot jump code is %02x %02x\n",
+ bs.boot_jump[0], bs.boot_jump[1] );
+
+ if (!reserved_sectors)
+ reserved_sectors = (size_fat == 32) ? 32 : 1;
+ else {
+ if (size_fat == 32 && reserved_sectors < 2)
+ die("On FAT32 at least 2 reserved sectors are needed.");
+ }
+ bs.reserved = CT_LE_W(reserved_sectors);
+ if (verbose >= 2)
+ printf( "Using %d reserved sectors\n", reserved_sectors );
+ bs.fats = (char) nr_fats;
+ if (!atari_format || size_fat == 32)
+ bs.hidden = CT_LE_L(hidden_sectors);
+ else {
+ /* In Atari format, hidden is a 16 bit field */
+ __u16 hidden = CT_LE_W(hidden_sectors);
+ if (hidden_sectors & ~0xffff)
+ die("#hidden doesn't fit in 16bit field of Atari format\n");
+ memcpy( &bs.hidden, &hidden, 2 );
+ }
+
+ num_sectors = (long long)blocks*BLOCK_SIZE/sector_size;
+ if (!atari_format) {
+ unsigned fatlength12, fatlength16, fatlength32;
+ unsigned maxclust12, maxclust16, maxclust32;
+ unsigned clust12, clust16, clust32;
+ int maxclustsize;
+
+ fatdata = num_sectors - cdiv (root_dir_entries * 32, sector_size) -
+ reserved_sectors;
+
+ if (sectors_per_cluster)
+ bs.cluster_size = maxclustsize = sectors_per_cluster;
+ else
+ /* An initial guess for bs.cluster_size should already be set */
+ maxclustsize = 128;
+
+ if (verbose >= 2)
+ printf( "%d sectors for FAT+data, starting with %d sectors/cluster\n",
+ fatdata, bs.cluster_size );
+ do {
+ if (verbose >= 2)
+ printf( "Trying with %d sectors/cluster:\n", bs.cluster_size );
+
+ /* The factor 2 below avoids cut-off errors for nr_fats == 1.
+ * The "nr_fats*3" is for the reserved first two FAT entries */
+ clust12 = 2*((long long) fatdata *sector_size + nr_fats*3) /
+ (2*(int) bs.cluster_size * sector_size + nr_fats*3);
+ fatlength12 = cdiv (((clust12+2) * 3 + 1) >> 1, sector_size);
+ /* Need to recalculate number of clusters, since the unused parts of the
+ * FATS and data area together could make up space for an additional,
+ * not really present cluster. */
+ clust12 = (fatdata - nr_fats*fatlength12)/bs.cluster_size;
+ maxclust12 = (fatlength12 * 2 * sector_size) / 3;
+ if (maxclust12 > MAX_CLUST_12)
+ maxclust12 = MAX_CLUST_12;
+ if (verbose >= 2)
+ printf( "FAT12: #clu=%u, fatlen=%u, maxclu=%u, limit=%u\n",
+ clust12, fatlength12, maxclust12, MAX_CLUST_12 );
+ if (clust12 > maxclust12-2) {
+ clust12 = 0;
+ if (verbose >= 2)
+ printf( "FAT12: too much clusters\n" );
+ }
+
+ clust16 = ((long long) fatdata *sector_size + nr_fats*4) /
+ ((int) bs.cluster_size * sector_size + nr_fats*2);
+ fatlength16 = cdiv ((clust16+2) * 2, sector_size);
+ /* Need to recalculate number of clusters, since the unused parts of the
+ * FATS and data area together could make up space for an additional,
+ * not really present cluster. */
+ clust16 = (fatdata - nr_fats*fatlength16)/bs.cluster_size;
+ maxclust16 = (fatlength16 * sector_size) / 2;
+ if (maxclust16 > MAX_CLUST_16)
+ maxclust16 = MAX_CLUST_16;
+ if (verbose >= 2)
+ printf( "FAT16: #clu=%u, fatlen=%u, maxclu=%u, limit=%u\n",
+ clust16, fatlength16, maxclust16, MAX_CLUST_16 );
+ if (clust16 > maxclust16-2) {
+ if (verbose >= 2)
+ printf( "FAT16: too much clusters\n" );
+ clust16 = 0;
+ }
+ /* The < 4078 avoids that the filesystem will be misdetected as having a
+ * 12 bit FAT. */
+ if (clust16 < FAT12_THRESHOLD && !(size_fat_by_user && size_fat == 16)) {
+ if (verbose >= 2)
+ printf( clust16 < FAT12_THRESHOLD ?
+ "FAT16: would be misdetected as FAT12\n" :
+ "FAT16: too much clusters\n" );
+ clust16 = 0;
+ }
+
+ clust32 = ((long long) fatdata *sector_size + nr_fats*8) /
+ ((int) bs.cluster_size * sector_size + nr_fats*4);
+ fatlength32 = cdiv ((clust32+2) * 4, sector_size);
+ /* Need to recalculate number of clusters, since the unused parts of the
+ * FATS and data area together could make up space for an additional,
+ * not really present cluster. */
+ clust32 = (fatdata - nr_fats*fatlength32)/bs.cluster_size;
+ maxclust32 = (fatlength32 * sector_size) / 4;
+ if (maxclust32 > MAX_CLUST_32)
+ maxclust32 = MAX_CLUST_32;
+ if (clust32 && clust32 < MIN_CLUST_32 && !(size_fat_by_user && size_fat == 32)) {
+ clust32 = 0;
+ if (verbose >= 2)
+ printf( "FAT32: not enough clusters (%d)\n", MIN_CLUST_32);
+ }
+ if (verbose >= 2)
+ printf( "FAT32: #clu=%u, fatlen=%u, maxclu=%u, limit=%u\n",
+ clust32, fatlength32, maxclust32, MAX_CLUST_32 );
+ if (clust32 > maxclust32) {
+ clust32 = 0;
+ if (verbose >= 2)
+ printf( "FAT32: too much clusters\n" );
+ }
+
+ if ((clust12 && (size_fat == 0 || size_fat == 12)) ||
+ (clust16 && (size_fat == 0 || size_fat == 16)) ||
+ (clust32 && size_fat == 32))
+ break;
+
+ bs.cluster_size <<= 1;
+ } while (bs.cluster_size && bs.cluster_size <= maxclustsize);
+
+ /* Use the optimal FAT size if not specified;
+ * FAT32 is (not yet) choosen automatically */
+ if (!size_fat) {
+ size_fat = (clust16 > clust12) ? 16 : 12;
+ if (verbose >= 2)
+ printf( "Choosing %d bits for FAT\n", size_fat );
+ }
+
+ switch (size_fat) {
+ case 12:
+ cluster_count = clust12;
+ fat_length = fatlength12;
+ bs.fat_length = CT_LE_W(fatlength12);
+ memcpy(vi->fs_type, MSDOS_FAT12_SIGN, 8);
+ break;
+
+ case 16:
+ if (clust16 < FAT12_THRESHOLD) {
+ if (size_fat_by_user) {
+ fprintf( stderr, "WARNING: Not enough clusters for a "
+ "16 bit FAT! The filesystem will be\n"
+ "misinterpreted as having a 12 bit FAT without "
+ "mount option \"fat=16\".\n" );
+ }
+ else {
+ fprintf( stderr, "This filesystem has an unfortunate size. "
+ "A 12 bit FAT cannot provide\n"
+ "enough clusters, but a 16 bit FAT takes up a little "
+ "bit more space so that\n"
+ "the total number of clusters becomes less than the "
+ "threshold value for\n"
+ "distinction between 12 and 16 bit FATs.\n" );
+ die( "Make the file system a bit smaller manually." );
+ }
+ }
+ cluster_count = clust16;
+ fat_length = fatlength16;
+ bs.fat_length = CT_LE_W(fatlength16);
+ memcpy(vi->fs_type, MSDOS_FAT16_SIGN, 8);
+ break;
+
+ case 32:
+ if (clust32 < MIN_CLUST_32)
+ fprintf(stderr, "WARNING: Not enough clusters for a 32 bit FAT!\n");
+ cluster_count = clust32;
+ fat_length = fatlength32;
+ bs.fat_length = CT_LE_W(0);
+ bs.fat32.fat32_length = CT_LE_L(fatlength32);
+ memcpy(vi->fs_type, MSDOS_FAT32_SIGN, 8);
+ break;
+
+ default:
+ die("FAT not 12, 16 or 32 bits");
+ }
+ }
+ else {
+ unsigned clusters, maxclust;
+
+ /* GEMDOS always uses a 12 bit FAT on floppies, and always a 16 bit FAT on
+ * hard disks. So use 12 bit if the size of the file system suggests that
+ * this fs is for a floppy disk, if the user hasn't explicitly requested a
+ * size.
+ */
+ if (!size_fat)
+ size_fat = (num_sectors == 1440 || num_sectors == 2400 ||
+ num_sectors == 2880 || num_sectors == 5760) ? 12 : 16;
+ if (verbose >= 2)
+ printf( "Choosing %d bits for FAT\n", size_fat );
+
+ /* Atari format: cluster size should be 2, except explicitly requested by
+ * the user, since GEMDOS doesn't like other cluster sizes very much.
+ * Instead, tune the sector size for the FS to fit.
+ */
+ bs.cluster_size = sectors_per_cluster ? sectors_per_cluster : 2;
+ if (!sector_size_set) {
+ while( num_sectors > GEMDOS_MAX_SECTORS ) {
+ num_sectors >>= 1;
+ sector_size <<= 1;
+ }
+ }
+ if (verbose >= 2)
+ printf( "Sector size must be %d to have less than %d log. sectors\n",
+ sector_size, GEMDOS_MAX_SECTORS );
+
+ /* Check if there are enough FAT indices for how much clusters we have */
+ do {
+ fatdata = num_sectors - cdiv (root_dir_entries * 32, sector_size) -
+ reserved_sectors;
+ /* The factor 2 below avoids cut-off errors for nr_fats == 1 and
+ * size_fat == 12
+ * The "2*nr_fats*size_fat/8" is for the reserved first two FAT entries
+ */
+ clusters = (2*((long long)fatdata*sector_size - 2*nr_fats*size_fat/8)) /
+ (2*((int)bs.cluster_size*sector_size + nr_fats*size_fat/8));
+ fat_length = cdiv( (clusters+2)*size_fat/8, sector_size );
+ /* Need to recalculate number of clusters, since the unused parts of the
+ * FATS and data area together could make up space for an additional,
+ * not really present cluster. */
+ clusters = (fatdata - nr_fats*fat_length)/bs.cluster_size;
+ maxclust = (fat_length*sector_size*8)/size_fat;
+ if (verbose >= 2)
+ printf( "ss=%d: #clu=%d, fat_len=%d, maxclu=%d\n",
+ sector_size, clusters, fat_length, maxclust );
+
+ /* last 10 cluster numbers are special (except FAT32: 4 high bits rsvd);
+ * first two numbers are reserved */
+ if (maxclust <= (size_fat == 32 ? MAX_CLUST_32 : (1<<size_fat)-0x10) &&
+ clusters <= maxclust-2)
+ break;
+ if (verbose >= 2)
+ printf( clusters > maxclust-2 ?
+ "Too many clusters\n" : "FAT too big\n" );
+
+ /* need to increment sector_size once more to */
+ if (sector_size_set)
+ die( "With this sector size, the maximum number of FAT entries "
+ "would be exceeded." );
+ num_sectors >>= 1;
+ sector_size <<= 1;
+ } while( sector_size <= GEMDOS_MAX_SECTOR_SIZE );
+
+ if (sector_size > GEMDOS_MAX_SECTOR_SIZE)
+ die( "Would need a sector size > 16k, which GEMDOS can't work with");
+
+ cluster_count = clusters;
+ if (size_fat != 32)
+ bs.fat_length = CT_LE_W(fat_length);
+ else {
+ bs.fat_length = 0;
+ bs.fat32.fat32_length = CT_LE_L(fat_length);
+ }
+ }
+
+ bs.sector_size[0] = (char) (sector_size & 0x00ff);
+ bs.sector_size[1] = (char) ((sector_size & 0xff00) >> 8);
+
+ if (size_fat == 32)
+ {
+ /* set up additional FAT32 fields */
+ bs.fat32.flags = CT_LE_W(0);
+ bs.fat32.version[0] = 0;
+ bs.fat32.version[1] = 0;
+ bs.fat32.root_cluster = CT_LE_L(2);
+ bs.fat32.info_sector = CT_LE_W(1);
+ if (!backup_boot)
+ backup_boot = (reserved_sectors >= 7) ? 6 :
+ (reserved_sectors >= 2) ? reserved_sectors-1 : 0;
+ else
+ {
+ if (backup_boot == 1)
+ die("Backup boot sector must be after sector 1");
+ else if (backup_boot >= reserved_sectors)
+ die("Backup boot sector must be a reserved sector");
+ }
+ if (verbose >= 2)
+ printf( "Using sector %d as backup boot sector (0 = none)\n",
+ backup_boot );
+ bs.fat32.backup_boot = CT_LE_W(backup_boot);
+ memset( &bs.fat32.reserved2, 0, sizeof(bs.fat32.reserved2) );
+ }
+
+ if (atari_format) {
+ /* Just some consistency checks */
+ if (num_sectors >= GEMDOS_MAX_SECTORS)
+ die( "GEMDOS can't handle more than 65531 sectors" );
+ else if (num_sectors >= OLDGEMDOS_MAX_SECTORS)
+ printf( "Warning: More than 32765 sector need TOS 1.04 "
+ "or higher.\n" );
+ }
+ if (num_sectors >= 65536)
+ {
+ bs.sectors[0] = (char) 0;
+ bs.sectors[1] = (char) 0;
+ bs.total_sect = CT_LE_L(num_sectors);
+ }
+ else
+ {
+ bs.sectors[0] = (char) (num_sectors & 0x00ff);
+ bs.sectors[1] = (char) ((num_sectors & 0xff00) >> 8);
+ if (!atari_format)
+ bs.total_sect = CT_LE_L(0);
+ }
+
+ if (!atari_format)
+ vi->ext_boot_sign = MSDOS_EXT_SIGN;
+
+ if (!cluster_count)
+ {
+ if (sectors_per_cluster) /* If yes, die if we'd spec'd sectors per cluster */
+ die ("Too many clusters for file system - try more sectors per cluster");
+ else
+ die ("Attempting to create a too large file system");
+ }
+
+
+ /* The two following vars are in hard sectors, i.e. 512 byte sectors! */
+ start_data_sector = (reserved_sectors + nr_fats * fat_length) *
+ (sector_size/HARD_SECTOR_SIZE);
+ start_data_block = (start_data_sector + SECTORS_PER_BLOCK - 1) /
+ SECTORS_PER_BLOCK;
+
+ if (blocks < start_data_block + 32) /* Arbitrary undersize file system! */
+ die ("Too few blocks for viable file system");
+
+ if (verbose)
+ {
+ printf("%s has %d head%s and %d sector%s per track,\n",
+ device_name, CF_LE_W(bs.heads), (CF_LE_W(bs.heads) != 1) ? "s" : "",
+ CF_LE_W(bs.secs_track), (CF_LE_W(bs.secs_track) != 1) ? "s" : "");
+ printf("logical sector size is %d,\n",sector_size);
+ printf("using 0x%02x media descriptor, with %d sectors;\n",
+ (int) (bs.media), num_sectors);
+ printf("file system has %d %d-bit FAT%s and %d sector%s per cluster.\n",
+ (int) (bs.fats), size_fat, (bs.fats != 1) ? "s" : "",
+ (int) (bs.cluster_size), (bs.cluster_size != 1) ? "s" : "");
+ printf ("FAT size is %d sector%s, and provides %d cluster%s.\n",
+ fat_length, (fat_length != 1) ? "s" : "",
+ cluster_count, (cluster_count != 1) ? "s" : "");
+ if (size_fat != 32)
+ printf ("Root directory contains %d slots.\n",
+ (int) (bs.dir_entries[0]) + (int) (bs.dir_entries[1]) * 256);
+ printf ("Volume ID is %08lx, ", volume_id &
+ (atari_format ? 0x00ffffff : 0xffffffff));
+ if ( strcmp(volume_name, " ") )
+ printf("volume label %s.\n", volume_name);
+ else
+ printf("no volume label.\n");
+ }
+
+ /* Make the file allocation tables! */
+
+ if ((fat = (unsigned char *) malloc (fat_length * sector_size)) == NULL)
+ die ("unable to allocate space for FAT image in memory");
+
+ memset( fat, 0, fat_length * sector_size );
+
+ mark_FAT_cluster (0, 0xffffffff); /* Initial fat entries */
+ mark_FAT_cluster (1, 0xffffffff);
+ fat[0] = (unsigned char) bs.media; /* Put media type in first byte! */
+ if (size_fat == 32) {
+ /* Mark cluster 2 as EOF (used for root dir) */
+ mark_FAT_cluster (2, FAT_EOF);
+ }
+
+ /* Make the root directory entries */
+
+ size_root_dir = (size_fat == 32) ?
+ bs.cluster_size*sector_size :
+ (((int)bs.dir_entries[1]*256+(int)bs.dir_entries[0]) *
+ sizeof (struct msdos_dir_entry));
+ if ((root_dir = (struct msdos_dir_entry *) malloc (size_root_dir)) == NULL)
+ {
+ free (fat); /* Tidy up before we die! */
+ die ("unable to allocate space for root directory in memory");
+ }
+
+ memset(root_dir, 0, size_root_dir);
+ if ( memcmp(volume_name, " ", 11) )
+ {
+ struct msdos_dir_entry *de = &root_dir[0];
+ memcpy(de->name, volume_name, 11);
+ de->attr = ATTR_VOLUME;
+ ctime = localtime(&create_time);
+ de->time = CT_LE_W((unsigned short)((ctime->tm_sec >> 1) +
+ (ctime->tm_min << 5) + (ctime->tm_hour << 11)));
+ de->date = CT_LE_W((unsigned short)(ctime->tm_mday +
+ ((ctime->tm_mon+1) << 5) +
+ ((ctime->tm_year-80) << 9)));
+ de->ctime_ms = 0;
+ de->ctime = de->time;
+ de->cdate = de->date;
+ de->adate = de->date;
+ de->starthi = CT_LE_W(0);
+ de->start = CT_LE_W(0);
+ de->size = CT_LE_L(0);
+ }
+
+ if (size_fat == 32) {
+ /* For FAT32, create an info sector */
+ struct fat32_fsinfo *info;
+
+ if (!(info_sector = malloc( sector_size )))
+ die("Out of memory");
+ memset(info_sector, 0, sector_size);
+ /* fsinfo structure is at offset 0x1e0 in info sector by observation */
+ info = (struct fat32_fsinfo *)(info_sector + 0x1e0);
+
+ /* Info sector magic */
+ info_sector[0] = 'R';
+ info_sector[1] = 'R';
+ info_sector[2] = 'a';
+ info_sector[3] = 'A';
+
+ /* Magic for fsinfo structure */
+ info->signature = CT_LE_L(0x61417272);
+ /* We've allocated cluster 2 for the root dir. */
+ info->free_clusters = CT_LE_L(cluster_count - 1);
+ info->next_cluster = CT_LE_L(2);
+
+ /* Info sector also must have boot sign */
+ *(__u16 *)(info_sector + 0x1fe) = CT_LE_W(BOOT_SIGN);
+ }
+
+ if (!(blank_sector = malloc( sector_size )))
+ die( "Out of memory" );
+ memset(blank_sector, 0, sector_size);
+}
+
+
+/* Write the new filesystem's data tables to wherever they're going to end up! */
+
+#define error(str) \
+ do { \
+ free (fat); \
+ if (info_sector) free (info_sector); \
+ free (root_dir); \
+ die (str); \
+ } while(0)
+
+#define seekto(pos,errstr) \
+ do { \
+ loff_t __pos = (pos); \
+ if (llseek (dev, __pos, SEEK_SET) != __pos) \
+ error ("seek to " errstr " failed whilst writing tables"); \
+ } while(0)
+
+#define writebuf(buf,size,errstr) \
+ do { \
+ int __size = (size); \
+ if (write (dev, buf, __size) != __size) \
+ error ("failed whilst writing " errstr); \
+ } while(0)
+
+
+static void
+write_tables (void)
+{
+ int x;
+ int fat_length;
+
+ fat_length = (size_fat == 32) ?
+ CF_LE_L(bs.fat32.fat32_length) : CF_LE_W(bs.fat_length);
+
+ seekto( 0, "start of device" );
+ /* clear all reserved sectors */
+ for( x = 0; x < reserved_sectors; ++x )
+ writebuf( blank_sector, sector_size, "reserved sector" );
+ /* seek back to sector 0 and write the boot sector */
+ seekto( 0, "boot sector" );
+ writebuf( (char *) &bs, sizeof (struct msdos_boot_sector), "boot sector" );
+ /* on FAT32, write the info sector and backup boot sector */
+ if (size_fat == 32)
+ {
+ seekto( CF_LE_W(bs.fat32.info_sector)*sector_size, "info sector" );
+ writebuf( info_sector, 512, "info sector" );
+ if (backup_boot != 0)
+ {
+ seekto( backup_boot*sector_size, "backup boot sector" );
+ writebuf( (char *) &bs, sizeof (struct msdos_boot_sector),
+ "backup boot sector" );
+ }
+ }
+ /* seek to start of FATS and write them all */
+ seekto( reserved_sectors*sector_size, "first FAT" );
+ for (x = 1; x <= nr_fats; x++)
+ writebuf( fat, fat_length * sector_size, "FAT" );
+ /* Write the root directory directly after the last FAT. This is the root
+ * dir area on FAT12/16, and the first cluster on FAT32. */
+ writebuf( (char *) root_dir, size_root_dir, "root directory" );
+
+ if (blank_sector) free( blank_sector );
+ if (info_sector) free( info_sector );
+ free (root_dir); /* Free up the root directory space from setup_tables */
+ free (fat); /* Free up the fat table space reserved during setup_tables */
+}
+
+
+/* Report the command usage and return a failure error code */
+
+void
+usage (void)
+{
+ fatal_error("\
+Usage: mkdosfs [-A] [-c] [-C] [-v] [-I] [-l bad-block-file] [-b backup-boot-sector]\n\
+ [-m boot-msg-file] [-n volume-name] [-i volume-id]\n\
+ [-s sectors-per-cluster] [-S logical-sector-size] [-f number-of-FATs]\n\
+ [-h hidden-sectors] [-F fat-size] [-r root-dir-entries] [-R reserved-sectors]\n\
+ /dev/name [blocks]\n");
+}
+
+/*
+ * ++roman: On m68k, check if this is an Atari; if yes, turn on Atari variant
+ * of MS-DOS filesystem by default.
+ */
+static void check_atari( void )
+{
+#ifdef __mc68000__
+ FILE *f;
+ char line[128], *p;
+
+ if (!(f = fopen( "/proc/hardware", "r" ))) {
+ perror( "/proc/hardware" );
+ return;
+ }
+
+ while( fgets( line, sizeof(line), f ) ) {
+ if (strncmp( line, "Model:", 6 ) == 0) {
+ p = line + 6;
+ p += strspn( p, " \t" );
+ if (strncmp( p, "Atari ", 6 ) == 0)
+ atari_format = 1;
+ break;
+ }
+ }
+ fclose( f );
+#endif
+}
+
+/* The "main" entry point into the utility - we pick up the options and attempt to process them in some sort of sensible
+ way. In the event that some/all of the options are invalid we need to tell the user so that something can be done! */
+
+int
+main (int argc, char **argv)
+{
+ int c;
+ char *tmp;
+ char *listfile = NULL;
+ FILE *msgfile;
+ struct stat statbuf;
+ int i = 0, pos, ch;
+ int create = 0;
+ unsigned long long cblocks;
+ int min_sector_size;
+
+ if (argc && *argv) { /* What's the program name? */
+ char *p;
+ program_name = *argv;
+ if ((p = strrchr( program_name, '/' )))
+ program_name = p+1;
+ }
+
+ gettimeofday(&create_timeval, NULL);
+ create_time = create_timeval.tv_sec;
+ volume_id = (u_int32_t)( (create_timeval.tv_sec << 20) | create_timeval.tv_usec ); /* Default volume ID = creation time, fudged for more uniqueness */
+ check_atari();
+
+ printf ("%s " VERSION " (" VERSION_DATE ")\n",
+ program_name);
+
+ while ((c = getopt (argc, argv, "Ab:cCf:F:Ii:l:m:n:r:R:s:S:h:v")) != EOF)
+ /* Scan the command line for options */
+ switch (c)
+ {
+ case 'A': /* toggle Atari format */
+ atari_format = !atari_format;
+ break;
+
+ case 'b': /* b : location of backup boot sector */
+ backup_boot = (int) strtol (optarg, &tmp, 0);
+ if (*tmp || backup_boot < 2 || backup_boot > 0xffff)
+ {
+ printf ("Bad location for backup boot sector : %s\n", optarg);
+ usage ();
+ }
+ break;
+
+ case 'c': /* c : Check FS as we build it */
+ check = TRUE;
+ break;
+
+ case 'C': /* C : Create a new file */
+ create = TRUE;
+ break;
+
+ case 'f': /* f : Choose number of FATs */
+ nr_fats = (int) strtol (optarg, &tmp, 0);
+ if (*tmp || nr_fats < 1 || nr_fats > 4)
+ {
+ printf ("Bad number of FATs : %s\n", optarg);
+ usage ();
+ }
+ break;
+
+ case 'F': /* F : Choose FAT size */
+ size_fat = (int) strtol (optarg, &tmp, 0);
+ if (*tmp || (size_fat != 12 && size_fat != 16 && size_fat != 32))
+ {
+ printf ("Bad FAT type : %s\n", optarg);
+ usage ();
+ }
+ size_fat_by_user = 1;
+ break;
+
+ case 'h': /* h : number of hidden sectors */
+ hidden_sectors = (int) strtol (optarg, &tmp, 0);
+ if ( *tmp || hidden_sectors < 0 )
+ {
+ printf("Bad number of hidden sectors : %s\n", optarg);
+ usage ();
+ }
+ break;
+
+ case 'I':
+ ignore_full_disk = 1;
+ break;
+
+ case 'i': /* i : specify volume ID */
+ volume_id = strtoul(optarg, &tmp, 16);
+ if ( *tmp )
+ {
+ printf("Volume ID must be a hexadecimal number\n");
+ usage();
+ }
+ break;
+
+ case 'l': /* l : Bad block filename */
+ listfile = optarg;
+ break;
+
+ case 'm': /* m : Set boot message */
+ if ( strcmp(optarg, "-") )
+ {
+ msgfile = fopen(optarg, "r");
+ if ( !msgfile )
+ perror(optarg);
+ }
+ else
+ msgfile = stdin;
+
+ if ( msgfile )
+ {
+ /* The boot code ends at offset 448 and needs a null terminator */
+ i = MESSAGE_OFFSET;
+ pos = 0; /* We are at beginning of line */
+ do
+ {
+ ch = getc(msgfile);
+ switch (ch)
+ {
+ case '\r': /* Ignore CRs */
+ case '\0': /* and nulls */
+ break;
+
+ case '\n': /* LF -> CR+LF if necessary */
+ if ( pos ) /* If not at beginning of line */
+ {
+ dummy_boot_code[i++] = '\r';
+ pos = 0;
+ }
+ dummy_boot_code[i++] = '\n';
+ break;
+
+ case '\t': /* Expand tabs */
+ do
+ {
+ dummy_boot_code[i++] = ' ';
+ pos++;
+ }
+ while ( pos % 8 && i < BOOTCODE_SIZE-1 );
+ break;
+
+ case EOF:
+ dummy_boot_code[i++] = '\0'; /* Null terminator */
+ break;
+
+ default:
+ dummy_boot_code[i++] = ch; /* Store character */
+ pos++; /* Advance position */
+ break;
+ }
+ }
+ while ( ch != EOF && i < BOOTCODE_SIZE-1 );
+
+ /* Fill up with zeros */
+ while( i < BOOTCODE_SIZE-1 )
+ dummy_boot_code[i++] = '\0';
+ dummy_boot_code[BOOTCODE_SIZE-1] = '\0'; /* Just in case */
+
+ if ( ch != EOF )
+ printf ("Warning: message too long; truncated\n");
+
+ if ( msgfile != stdin )
+ fclose(msgfile);
+ }
+ break;
+
+ case 'n': /* n : Volume name */
+ sprintf(volume_name, "%-11.11s", optarg);
+ break;
+
+ case 'r': /* r : Root directory entries */
+ root_dir_entries = (int) strtol (optarg, &tmp, 0);
+ if (*tmp || root_dir_entries < 16 || root_dir_entries > 32768)
+ {
+ printf ("Bad number of root directory entries : %s\n", optarg);
+ usage ();
+ }
+ break;
+
+ case 'R': /* R : number of reserved sectors */
+ reserved_sectors = (int) strtol (optarg, &tmp, 0);
+ if (*tmp || reserved_sectors < 1 || reserved_sectors > 0xffff)
+ {
+ printf ("Bad number of reserved sectors : %s\n", optarg);
+ usage ();
+ }
+ break;
+
+ case 's': /* s : Sectors per cluster */
+ sectors_per_cluster = (int) strtol (optarg, &tmp, 0);
+ if (*tmp || (sectors_per_cluster != 1 && sectors_per_cluster != 2
+ && sectors_per_cluster != 4 && sectors_per_cluster != 8
+ && sectors_per_cluster != 16 && sectors_per_cluster != 32
+ && sectors_per_cluster != 64 && sectors_per_cluster != 128))
+ {
+ printf ("Bad number of sectors per cluster : %s\n", optarg);
+ usage ();
+ }
+ break;
+
+ case 'S': /* S : Sector size */
+ sector_size = (int) strtol (optarg, &tmp, 0);
+ if (*tmp || (sector_size != 512 && sector_size != 1024 &&
+ sector_size != 2048 && sector_size != 4096 &&
+ sector_size != 8192 && sector_size != 16384 &&
+ sector_size != 32768))
+ {
+ printf ("Bad logical sector size : %s\n", optarg);
+ usage ();
+ }
+ sector_size_set = 1;
+ break;
+
+ case 'v': /* v : Verbose execution */
+ ++verbose;
+ break;
+
+ default:
+ printf( "Unknown option: %c\n", c );
+ usage ();
+ }
+ if (optind < argc)
+ {
+ device_name = argv[optind]; /* Determine the number of blocks in the FS */
+
+ if (!device_name) {
+ printf("No device specified.\n");
+ usage();
+ }
+
+ if (!create)
+ cblocks = count_blocks (device_name); /* Have a look and see! */
+ }
+ if (optind == argc - 2) /* Either check the user specified number */
+ {
+ blocks = strtoull (argv[optind + 1], &tmp, 0);
+ if (!create && blocks != cblocks)
+ {
+ fprintf (stderr, "Warning: block count mismatch: ");
+ fprintf (stderr, "found %llu but assuming %llu.\n",cblocks,blocks);
+ }
+ }
+ else if (optind == argc - 1) /* Or use value found */
+ {
+ if (create)
+ die( "Need intended size with -C." );
+ blocks = cblocks;
+ tmp = "";
+ }
+ else
+ {
+ fprintf (stderr, "No device specified!\n");
+ usage ();
+ }
+ if (*tmp)
+ {
+ printf ("Bad block count : %s\n", argv[optind + 1]);
+ usage ();
+ }
+
+ if (check && listfile) /* Auto and specified bad block handling are mutually */
+ die ("-c and -l are incompatible"); /* exclusive of each other! */
+
+ if (!create) {
+ check_mount (device_name); /* Is the device already mounted? */
+ dev = open (device_name, O_EXCL|O_RDWR); /* Is it a suitable device to build the FS on? */
+ if (dev < 0)
+ die ("unable to open %s");
+ }
+ else {
+ off_t offset = blocks*BLOCK_SIZE - 1;
+ char null = 0;
+ /* create the file */
+ dev = open( device_name, O_EXCL|O_RDWR|O_CREAT|O_TRUNC, 0666 );
+ if (dev < 0)
+ die("unable to create %s");
+ /* seek to the intended end-1, and write one byte. this creates a
+ * sparse-as-possible file of appropriate size. */
+ if (llseek( dev, offset, SEEK_SET ) != offset)
+ die( "seek failed" );
+ if (write( dev, &null, 1 ) < 0)
+ die( "write failed" );
+ if (llseek( dev, 0, SEEK_SET ) != 0)
+ die( "seek failed" );
+ }
+
+ if (fstat (dev, &statbuf) < 0)
+ die ("unable to stat %s");
+ if (!S_ISBLK (statbuf.st_mode)) {
+ statbuf.st_rdev = 0;
+ check = 0;
+ }
+ else
+ /*
+ * Ignore any 'full' fixed disk devices, if -I is not given.
+ * On a MO-disk one doesn't need partitions. The filesytem can go
+ * directly to the whole disk. Under other OSes this is known as
+ * the 'superfloppy' format. As I don't know how to find out if
+ * this is a MO disk I introduce a -I (ignore) switch. -Joey
+ */
+ if (!ignore_full_disk && (
+ (statbuf.st_rdev & 0xff3f) == 0x0300 || /* hda, hdb */
+ (statbuf.st_rdev & 0xff0f) == 0x0800 || /* sd */
+ (statbuf.st_rdev & 0xff3f) == 0x0d00 || /* xd */
+ (statbuf.st_rdev & 0xff3f) == 0x1600 ) /* hdc, hdd */
+ )
+ die ("Device partition expected, not making filesystem on entire device '%s' (use -I to override)");
+
+ if (sector_size_set)
+ {
+ if (ioctl(dev, BLKSSZGET, &min_sector_size) >= 0)
+ if (sector_size < min_sector_size)
+ {
+ sector_size = min_sector_size;
+ fprintf(stderr, "Warning: sector size was set to %d (minimal for this device)\n", sector_size);
+ }
+ }
+ else
+ {
+ if (ioctl(dev, BLKSSZGET, &min_sector_size) >= 0)
+ {
+ sector_size = min_sector_size;
+ sector_size_set = 1;
+ }
+ }
+
+ if (sector_size > 4096)
+ fprintf(stderr,
+ "Warning: sector size is set to %d > 4096, such filesystem will not propably mount\n",
+ sector_size);
+
+ establish_params (statbuf.st_rdev,statbuf.st_size);
+ /* Establish the media parameters */
+
+ setup_tables (); /* Establish the file system tables */
+
+ if (check) /* Determine any bad block locations and mark them */
+ check_blocks ();
+ else if (listfile)
+ get_list_blocks (listfile);
+
+ write_tables (); /* Write the file system tables away! */
+
+ exit (0); /* Terminate with no errors! */
+}
+
+
+/* That's All Folks */
+/* Local Variables: */
+/* tab-width: 8 */
+/* End: */
diff --git a/src/version.h b/src/version.h
new file mode 100644
index 0000000..5a97926
--- /dev/null
+++ b/src/version.h
@@ -0,0 +1,28 @@
+/* version.h
+
+ Copyright (C) 1998-2005 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#ifndef _version_h
+#define _version_h
+
+#define VERSION "3.0.1"
+#define VERSION_DATE "23 Nov 2008"
+
+#endif /* _version_h */
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-08 14:08:22 +0000