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/* tools/editdisklbl/editdisklbl.c
*
* Copyright 2008, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define __USE_LARGEFILE64
#define __USE_FILE_OFFSET64
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "diskconfig/diskconfig.h"
/* give us some room */
#define EXTRA_LBAS 100
static struct pf_map {
struct part_info *pinfo;
const char *filename;
} part_file_map[MAX_NUM_PARTS] = { {0, 0} };
static int
usage(void)
{
fprintf(stderr,
"\nusage: editdisklbl <options> part1=file1 [part2=file2,...]\n"
"Where options can be one of:\n"
"\t\t-l <layout conf> -- The image layout config file.\n"
"\t\t-i <image file> -- The image file to edit.\n"
"\t\t-t -- Test mode (optional)\n"
"\t\t-v -- Be verbose\n"
"\t\t-h -- This message (optional)\n"
);
return 1;
}
static int
parse_args(int argc, char *argv[], struct disk_info **dinfo, int *test,
int *verbose)
{
char *layout_conf = NULL;
char *img_file = NULL;
struct stat filestat;
int x;
int update_lba = 0;
while ((x = getopt (argc, argv, "vthl:i:")) != EOF) {
switch (x) {
case 'h':
return usage();
case 'l':
layout_conf = optarg;
break;
case 't':
*test = 1;
break;
case 'i':
img_file = optarg;
break;
case 'v':
*verbose = 1;
break;
default:
fprintf(stderr, "Unknown argument: %c\n", (char)optopt);
return usage();
}
}
if (!img_file || !layout_conf) {
fprintf(stderr, "Image filename and configuration file are required\n");
return usage();
}
/* we'll need to parse the command line later for partition-file
* mappings, so make sure there's at least something there */
if (optind >= argc) {
fprintf(stderr, "Must provide partition -> file mappings\n");
return usage();
}
if (stat(img_file, &filestat)) {
perror("Cannot stat image file");
return 1;
}
/* make sure we don't screw up and write to a block device on the host
* and wedge things. I just don't trust myself. */
if (!S_ISREG(filestat.st_mode)) {
fprintf(stderr, "This program should only be used on regular files.");
return 1;
}
/* load the disk layout file */
if (!(*dinfo = load_diskconfig(layout_conf, img_file))) {
fprintf(stderr, "Errors encountered while loading disk conf file %s",
layout_conf);
return 1;
}
if ((*dinfo)->num_lba == 0) {
(*dinfo)->num_lba = (*dinfo)->skip_lba + EXTRA_LBAS;
update_lba = 1;
}
/* parse the filename->partition mappings from the command line and patch
* up a loaded config file's partition table entries to have
* length == filesize */
x = 0;
while (optind < argc) {
char *pair = argv[optind++];
char *part_name;
struct part_info *pinfo;
struct stat tmp_stat;
if (x >= MAX_NUM_PARTS) {
fprintf(stderr, "Error: Too many partitions specified (%d)!\n", x);
return 1;
}
if (!(part_name = strsep(&pair, "=")) || !pair || !(*pair)) {
fprintf(stderr, "Error parsing partition mappings\n");
return usage();
}
if (!(pinfo = find_part(*dinfo, part_name))) {
fprintf(stderr, "Partition '%s' not found.\n", part_name);
return 1;
}
/* here pair points to the filename (after the '=') */
part_file_map[x].pinfo = pinfo;
part_file_map[x++].filename = pair;
if (stat(pair, &tmp_stat) < 0) {
fprintf(stderr, "Could not stat file: %s\n", pair);
return 1;
}
pinfo->len_kb = (uint32_t) ((tmp_stat.st_size + 1023) >> 10);
if (update_lba)
(*dinfo)->num_lba +=
((uint64_t)pinfo->len_kb * 1024) / (*dinfo)->sect_size;
printf("Updated %s length to be %uKB\n", pinfo->name, pinfo->len_kb);
}
return 0;
}
int
main(int argc, char *argv[])
{
struct disk_info *dinfo = NULL;
int test = 0;
int verbose = 0;
int cnt;
if (parse_args(argc, argv, &dinfo, &test, &verbose))
return 1;
if (verbose)
dump_disk_config(dinfo);
if (test)
printf("Test mode enabled. Actions will not be committed to disk!\n");
if (apply_disk_config(dinfo, test)) {
fprintf(stderr, "Could not apply disk configuration!\n");
return 1;
}
printf("Copying images to specified partition offsets\n");
/* now copy the images to their appropriate locations on disk */
for (cnt = 0; cnt < MAX_NUM_PARTS && part_file_map[cnt].pinfo; ++cnt) {
loff_t offs = part_file_map[cnt].pinfo->start_lba * dinfo->sect_size;
const char *dest_fn = dinfo->device;
if (write_raw_image(dest_fn, part_file_map[cnt].filename, offs, test)) {
fprintf(stderr, "Could not write images after editing label.\n");
return 1;
}
}
printf("File edit complete. Wrote %d images.\n", cnt);
return 0;
}
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