int main(int argc, char *argv[])
{
struct image_t img_1, img_2;
int diff;
image_read(argv[1], &img_1);
if(argv[2][0] == '1')
image_lsbr_rndcode(&img_1, 0.01);
image_clone(&img_1, &img_2);
image_plusone(&img_2);
image_offset(&img_1);
image_offset(&img_2);
image_write("image_ideal.bmp", &img_1);
image_write("image_plusone.bmp", &img_2);
return 0;
}
int loop_bind(FILE *image_fp, char **loop_dev, int autoclear) {
struct loop_info64 lo64 = {0};
int i;
message(DEBUG, "Called loop_bind(image_fp, **{loop_dev)\n");
if ( autoclear > 0 ) {
lo64.lo_flags = LO_FLAGS_AUTOCLEAR;
}
lo64.lo_offset = image_offset(image_fp);
for( i=0; i < MAX_LOOP_DEVS; i++ ) {
char *test_loopdev = strjoin("/dev/loop", int2str(i));
FILE *loop_fp;
if ( is_blk(test_loopdev) < 0 ) {
message(VERBOSE, "Creating loop device: %s\n", test_loopdev);
if ( mknod(test_loopdev, S_IFBLK | 0644, makedev(7, i)) < 0 ) {
message(ERROR, "Could not create %s: %s\n", test_loopdev, strerror(errno));
ABORT(255);
}
}
if ( ( loop_fp = fopen(test_loopdev, "r+") ) == NULL ) { // Flawfinder: ignore (not user modifyable)
message(VERBOSE, "Could not open loop device %s: %s\n", test_loopdev, strerror(errno));
continue;
}
message(VERBOSE2, "Attempting to associate image pointer to loop device\n");
if ( ioctl(fileno(loop_fp), LOOP_SET_FD, fileno(image_fp)) < 0 ) {
if ( errno == 16 ) {
message(VERBOSE3, "Loop device is in use: %s\n", test_loopdev);
fclose(loop_fp);
continue;
} else {
message(WARNING, "Could not associate image to loop %s: %s\n", test_loopdev, strerror(errno));
fclose(loop_fp);
continue;
}
}
message(VERBOSE, "Found valid loop device: %s\n", test_loopdev);
message(VERBOSE2, "Setting loop device flags\n");
if ( ioctl(fileno(loop_fp), LOOP_SET_STATUS64, &lo64) < 0 ) {
fprintf(stderr, "ERROR: Failed to set loop flags on loop device: %s\n", strerror(errno));
(void)ioctl(fileno(loop_fp), LOOP_CLR_FD, 0);
(void)loop_free(*loop_dev);
ABORT(255);
}
*loop_dev = strdup(test_loopdev);
message(VERBOSE, "Using loop device: %s\n", *loop_dev);
message(DEBUG, "Returning loop_bind(image_fp) = 0\n");
return(0);
}
message(ERROR, "No valid loop devices available\n");
ABORT(255);
return(-1);
}