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/* Copyright 1999-2003,2007,2009 Alain Knaff.
* This file is part of mtools.
*
* Mtools 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.
*
* Mtools 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 Mtools. If not, see <http://www.gnu.org/licenses/>.
*
* mcat.c
* Same thing as cat /dev/fd0 or cat file >/dev/fd0
* Something, that isn't possible with floppyd anymore.
*/
#include "sysincludes.h"
#include "msdos.h"
#include "mtools.h"
#include "mainloop.h"
#include "open_image.h"
static void usage(void) NORETURN;
static void usage(void)
{
fprintf(stderr, "Mtools version %s, dated %s\n",
mversion, mdate);
fprintf(stderr, "Usage: mcat [-V] [-w] device\n");
fprintf(stderr, " -w write on device else read\n");
exit(1);
}
#ifdef __CYGWIN__
#define BUF_SIZE 512u
#else
#define BUF_SIZE 16000u
#endif
static size_t bufLen(size_t blocksize, mt_off_t totalSize, mt_off_t address)
{
if(totalSize == 0)
return blocksize;
if((mt_off_t) blocksize > totalSize - address)
return (size_t) (totalSize - address);
return blocksize;
}
void mcat(int argc, char **argv, int type UNUSEDP) NORETURN;
void mcat(int argc, char **argv, int type UNUSEDP)
{
struct device *dev;
struct device out_dev;
char drive, name[EXPAND_BUF];
char errmsg[200];
Stream_t *Stream;
char buf[BUF_SIZE];
mt_off_t address = 0;
mt_off_t maxSize = 0;
char mode = O_RDONLY;
int c;
noPrivileges = 1;
if (argc < 2) {
usage();
}
while ((c = getopt(argc,argv, "wi:"))!= EOF) {
switch (c) {
case 'w':
mode = O_WRONLY;
break;
case 'i':
set_cmd_line_image(optarg);
break;
default:
usage();
}
}
if (argc - optind > 1)
usage();
if(argc - optind == 1) {
if(!argv[optind][0] || argv[optind][1] != ':')
usage();
drive = ch_toupper(argv[argc -1][0]);
} else {
drive = get_default_drive();
}
/* check out a drive whose letter and parameters match */
sprintf(errmsg, "Drive '%c:' not supported", drive);
Stream = NULL;
for (dev=devices; dev->name; dev++) {
FREE(&Stream);
if (dev->drive != drive)
continue;
out_dev = *dev;
expand(dev->name,name);
#ifdef USING_NEW_VOLD
strcpy(name, getVoldName(dev, name));
#endif
Stream = OpenImage(&out_dev, dev, name, mode,
errmsg, ALWAYS_GET_GEOMETRY, mode, &maxSize,
NULL, NULL);
if( !Stream)
continue;
break;
}
/* print error msg if needed */
if ( dev->drive == 0 )
goto exit_1;
if (mode == O_WRONLY) {
size_t len;
mt_off_t size=0;
if(chs_to_totsectors(&out_dev, errmsg) < 0 ||
check_if_sectors_fit(out_dev.tot_sectors,
maxSize, 512, errmsg))
goto exit_1;
size = 512 * (mt_off_t) out_dev.tot_sectors;
while ((len = fread(buf, 1,
bufLen(BUF_SIZE, size, address),
stdin)) > 0) {
ssize_t r = PWRITES(Stream, buf, address, len);
fprintf(stderr, "Wrote to %d\n", (int) address);
if(r < 0)
break;
address += len;
}
} else {
ssize_t len;
while ((len = PREADS(Stream, buf, address, BUF_SIZE)) > 0) {
fwrite(buf, 1, (size_t) len, stdout);
address += (size_t) len;
}
}
FREE(&Stream);
exit(0);
exit_1:
FREE(&Stream);
fprintf(stderr,"%s\n",errmsg);
exit(1);
}
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