int main(int argc, char **argv)
{
char *value;
blkid_cache cache;
blkid_init_debug(BLKID_DEBUG_ALL);
if (argc != 2 && argc != 3) {
fprintf(stderr, "Usage:\t%s tagname=value\n"
"\t%s tagname devname\n"
"Find which device holds a given token or\n"
"Find what the value of a tag is in a device\n",
argv[0], argv[0]);
exit(1);
}
if (blkid_get_cache(&cache, "/dev/null") < 0) {
fprintf(stderr, "Couldn't get blkid cache\n");
exit(1);
}
if (argv[2]) {
value = blkid_get_tag_value(cache, argv[1], argv[2]);
printf("%s has tag %s=%s\n", argv[2], argv[1],
value ? value : "<missing>");
} else {
value = blkid_get_devname(cache, argv[1], NULL);
printf("%s has tag %s\n", value ? value : "<none>", argv[1]);
}
blkid_put_cache(cache);
return value ? 0 : 1;
}
/**
* blkid_evaluate_tag:
* @token: token name (e.g "LABEL" or "UUID")
* @value: token data
* @cache: pointer to cache (or NULL when you don't want to re-use the cache)
*
* Returns: allocated string with a device name.
*/
char *blkid_evaluate_tag(const char *token, const char *value, blkid_cache *cache)
{
struct blkid_config *conf = NULL;
char *t = NULL, *v = NULL;
char *ret = NULL;
int i;
if (!token)
return NULL;
if (!cache || !*cache)
blkid_init_debug(0);
DBG(DEBUG_EVALUATE,
printf("evaluating %s%s%s\n", token, value ? "=" : "",
value ? value : ""));
if (!value) {
if (!strchr(token, '=')) {
ret = blkid_strdup(token);
goto out;
}
blkid_parse_tag_string(token, &t, &v);
if (!t || !v)
goto out;
token = t;
value = v;
}
conf = blkid_read_config(NULL);
if (!conf)
goto out;
for (i = 0; i < conf->nevals; i++) {
if (conf->eval[i] == BLKID_EVAL_UDEV)
ret = evaluate_by_udev(token, value, conf->uevent);
else if (conf->eval[i] == BLKID_EVAL_SCAN)
ret = evaluate_by_scan(token, value, cache, conf);
if (ret)
break;
}
DBG(DEBUG_EVALUATE,
printf("%s=%s evaluated as %s\n", token, value, ret));
out:
blkid_free_config(conf);
free(t);
free(v);
return ret;
}
int main(int argc, char** argv)
{
char *devname, *tmp;
char diskname[PATH_MAX];
int major, minor;
dev_t devno, disk_devno;
const char *errmsg = "Couldn't parse %s: %s\n";
blkid_init_debug(BLKID_DEBUG_ALL);
if ((argc != 2) && (argc != 3)) {
fprintf(stderr, "Usage:\t%s device_number\n\t%s major minor\n"
"Resolve a device number to a device name\n",
argv[0], argv[0]);
exit(1);
}
if (argc == 2) {
devno = strtoul(argv[1], &tmp, 0);
if (*tmp) {
fprintf(stderr, errmsg, "device number", argv[1]);
exit(1);
}
} else {
major = strtoul(argv[1], &tmp, 0);
if (*tmp) {
fprintf(stderr, errmsg, "major number", argv[1]);
exit(1);
}
minor = strtoul(argv[2], &tmp, 0);
if (*tmp) {
fprintf(stderr, errmsg, "minor number", argv[2]);
exit(1);
}
devno = makedev(major, minor);
}
printf("Looking for device 0x%04llx\n", (long long)devno);
devname = blkid_devno_to_devname(devno);
free(devname);
printf("Looking for whole-device for 0x%04llx\n", (long long)devno);
if (blkid_devno_to_wholedisk(devno, diskname,
sizeof(diskname), &disk_devno) == 0)
printf("found devno 0x%04llx as /dev/%s\n", (long long) disk_devno, diskname);
return 0;
}
int main(int argc, char**argv)
{
blkid_cache cache = NULL;
int ret;
blkid_init_debug(BLKID_DEBUG_ALL);
if (argc > 2) {
fprintf(stderr, "Usage: %s [filename]\n"
"Test parsing of the cache (filename)\n", argv[0]);
exit(1);
}
if ((ret = blkid_get_cache(&cache, argv[1])) < 0)
fprintf(stderr, "error %d reading cache file %s\n", ret,
argv[1] ? argv[1] : blkid_get_cache_filename(NULL));
blkid_put_cache(cache);
return ret;
}
int main(int argc, char *argv[])
{
blkid_cache cache = NULL;
char *res;
if (argc < 3) {
fprintf(stderr, "usage: %s <token> <value>\n", argv[0]);
return EXIT_FAILURE;
}
blkid_init_debug(0);
res = blkid_evaluate_tag(argv[1], argv[2], &cache);
if (res)
printf("%s\n", res);
if (cache)
blkid_put_cache(cache);
return res ? EXIT_SUCCESS : EXIT_FAILURE;
}
int main(int argc, char** argv)
{
char *devname, *tmp;
int major, minor;
dev_t devno;
const char *errmsg = "Couldn't parse %s: %s\n";
blkid_init_debug(DEBUG_ALL);
if ((argc != 2) && (argc != 3)) {
fprintf(stderr, "Usage:\t%s device_number\n\t%s major minor\n"
"Resolve a device number to a device name\n",
argv[0], argv[0]);
exit(1);
}
if (argc == 2) {
devno = strtoul(argv[1], &tmp, 0);
if (*tmp) {
fprintf(stderr, errmsg, "device number", argv[1]);
exit(1);
}
} else {
major = strtoul(argv[1], &tmp, 0);
if (*tmp) {
fprintf(stderr, errmsg, "major number", argv[1]);
exit(1);
}
minor = strtoul(argv[2], &tmp, 0);
if (*tmp) {
fprintf(stderr, errmsg, "minor number", argv[2]);
exit(1);
}
devno = makedev(major, minor);
}
printf("Looking for device 0x%04llx\n", (long long)devno);
devname = blkid_devno_to_devname(devno);
free(devname);
return 0;
}
