OFF_T get_file_size(char *device) {
OFF_T size = 0;
fd_t fd;
#ifdef WINDOWS
SetLastError(0);
fd = CreateFile(device,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
0,
NULL);
#else
fd = open(device, 0);
#endif
if (INVALID_FD(fd)) {
return size;
}
size = SeekEnd(fd);
size /= BLK_SIZE;
CLOSE(fd);
return size;
}
int do_dump(child_args_t * args)
{
ssize_t NumBytes = 0;
OFF_T TargetLBA, TotalBytes = 0;
char *buff;
fd_t fd;
if ((buff = (char *)ALLOC(args->htrsiz * BLK_SIZE)) == NULL) {
fprintf(stderr, "Can't allocate buffer\n");
return (-1);
}
memset(buff, 0, args->htrsiz * BLK_SIZE);
fd = Open(args->device, args->flags | CLD_FLG_R);
if (INVALID_FD(fd)) {
pMsg(ERR, args, "could not open %s.\n", args->device);
pMsg(ERR, args, "%s: Error = %u\n", args->device,
GETLASTERROR());
return (-1);
}
TargetLBA = Seek(fd, args->start_lba * BLK_SIZE);
if (TargetLBA != (args->start_lba * (OFF_T) BLK_SIZE)) {
pMsg(ERR, args, "Could not seek to start position.\n");
CLOSE(fd);
return (-1);
}
do {
NumBytes = Read(fd, buff, args->htrsiz * BLK_SIZE);
if ((NumBytes > args->htrsiz * BLK_SIZE) || (NumBytes < 0)) {
pMsg(ERR, args, "Failure reading %s\n", args->device);
pMsg(ERR, args, "Last Error was %lu\n", GETLASTERROR());
break;
}
dump_data(stdout, buff, NumBytes, 16, 0, FMT_STR);
TotalBytes += (OFF_T) NumBytes;
} while ((TotalBytes < (args->htrsiz * BLK_SIZE)) && (NumBytes > 0));
FREE(buff);
CLOSE(fd);
return 0;
}
