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/*
* img_cat
* The Sleuth Kit
*
* Brian Carrier [carrier <at> sleuthkit [dot] org]
* Copyright (c) 2006-2011 Brian Carrier, Basis Technology. All rights reserved
*
* This software is distributed under the Common Public License 1.0
*/
#include "tsk/tsk_tools_i.h"
#include <errno.h>
#ifdef TSK_WIN32
#include <fcntl.h>
#endif
static TSK_TCHAR *progname;
static void
usage()
{
TFPRINTF(stderr,
_TSK_T
("usage: %s [-vV] [-i imgtype] [-b dev_sector_size] [-s start_sector] [-e stop_sector] image\n"),
progname);
tsk_fprintf(stderr,
"\t-i imgtype: The format of the image file (use 'i list' for supported types)\n");
tsk_fprintf(stderr,
"\t-b dev_sector_size: The size (in bytes) of the device sectors\n");
tsk_fprintf(stderr,
"\t-s start_sector: The sector number to start at\n");
tsk_fprintf(stderr,
"\t-e stop_sector: The sector number to stop at\n");
tsk_fprintf(stderr, "\t-v: verbose output to stderr\n");
tsk_fprintf(stderr, "\t-V: Print version\n");
exit(1);
}
int
main(int argc, char **argv1)
{
TSK_IMG_INFO *img;
TSK_IMG_TYPE_ENUM imgtype = TSK_IMG_TYPE_DETECT;
int ch;
TSK_OFF_T start_sector = 0;
TSK_OFF_T end_sector = 0;
ssize_t cnt;
TSK_TCHAR **argv;
unsigned int ssize = 0;
TSK_TCHAR *cp;
#ifdef TSK_WIN32
// On Windows, get the wide arguments (mingw doesn't support wmain)
argv = CommandLineToArgvW(GetCommandLineW(), &argc);
if (argv == NULL) {
fprintf(stderr, "Error getting wide arguments\n");
exit(1);
}
#else
argv = (TSK_TCHAR **) argv1;
#endif
progname = argv[0];
while ((ch = GETOPT(argc, argv, _TSK_T("b:i:vVs:e:"))) > 0) {
switch (ch) {
case _TSK_T('?'):
default:
TFPRINTF(stderr, _TSK_T("Invalid argument: %s\n"),
argv[OPTIND]);
usage();
case _TSK_T('b'):
ssize = (unsigned int) TSTRTOUL(OPTARG, &cp, 0);
if (*cp || *cp == *OPTARG || ssize < 1) {
TFPRINTF(stderr,
_TSK_T
("invalid argument: sector size must be positive: %s\n"),
OPTARG);
usage();
}
break;
case _TSK_T('i'):
if (TSTRCMP(OPTARG, _TSK_T("list")) == 0) {
tsk_img_type_print(stderr);
exit(1);
}
imgtype = tsk_img_type_toid(OPTARG);
if (imgtype == TSK_IMG_TYPE_UNSUPP) {
TFPRINTF(stderr, _TSK_T("Unsupported image type: %s\n"),
OPTARG);
usage();
}
break;
case _TSK_T('s'):
start_sector = TSTRTOUL(OPTARG, &cp, 0);
if (*cp || *cp == *OPTARG || start_sector < 1) {
TFPRINTF(stderr,
_TSK_T
("invalid argument: start sector must be positive: %s\n"),
OPTARG);
usage();
}
break;
case _TSK_T('e'):
end_sector = TSTRTOUL(OPTARG, &cp, 0);
if (*cp || *cp == *OPTARG || end_sector < 1) {
TFPRINTF(stderr,
_TSK_T
("invalid argument: end sector must be positive: %s\n"),
OPTARG);
usage();
}
break;
case _TSK_T('v'):
tsk_verbose++;
break;
case _TSK_T('V'):
tsk_version_print(stdout);
exit(0);
}
}
/* We need at least one more argument */
if (OPTIND >= argc) {
tsk_fprintf(stderr, "Missing image name\n");
usage();
}
if ((img =
tsk_img_open(argc - OPTIND, &argv[OPTIND], imgtype,
ssize)) == NULL) {
tsk_error_print(stderr);
exit(1);
}
#ifdef TSK_WIN32
if (-1 == _setmode(_fileno(stdout), _O_BINARY)) {
fprintf(stderr,
"error setting stdout to binary: %s", strerror(errno));
exit(1);
}
#endif
TSK_OFF_T start_byte = 0;
if (start_sector)
start_byte = start_sector * img->sector_size;
TSK_OFF_T end_byte = 0;
if (end_sector)
end_byte = (end_sector + 1) * img->sector_size;
else
end_byte = img->size;
for (TSK_OFF_T done = start_byte; done < end_byte; done += cnt) {
char buf[16 * 1024];
size_t len;
if (done + (TSK_OFF_T) sizeof(buf) > end_byte) {
len = (size_t) (end_byte - done);
}
else {
len = sizeof(buf);
}
cnt = tsk_img_read(img, done, buf, len);
if (cnt != (ssize_t) len) {
if (cnt >= 0) {
tsk_fprintf(stderr,
"img_cat: Error reading image file at offset: %"
PRIdOFF ", len: %" PRIu64 ", return: %" PRId64 "\n",
done, len, cnt);
}
else {
tsk_error_print(stderr);
}
tsk_img_close(img);
exit(1);
}
if (fwrite(buf, cnt, 1, stdout) != 1) {
fprintf(stderr,
"img_cat: Error writing to stdout: %s", strerror(errno));
tsk_img_close(img);
exit(1);
}
}
tsk_img_close(img);
exit(0);
}
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