The answer of Akash Rawal is pretty close. A good way is to use libblkid.
This is an example of getting a uuid section: Using libblkid to find the UUID of a section .
I combined the above code and examples in the libblkid help menu and generated the working program below:
#include <stdio.h>
#include <string.h>
#include <err.h>
#include <blkid/blkid.h>
int main (int argc, char *argv[]) {
blkid_probe pr = blkid_new_probe_from_filename(argv[1]);
if (!pr) {
err(1, "Failed to open %s", argv[1]);
}
blkid_partlist ls;
int nparts, i;
ls = blkid_probe_get_partitions(pr);
nparts = blkid_partlist_numof_partitions(ls);
printf("Number of partitions:%d\n", nparts);
if (nparts <= 0){
printf("Please enter correct device name! e.g. \"/dev/sdc\"\n");
return;
}
const char *uuid;
const char *label;
const char *type;
for (i = 0; i < nparts; i++) {
char dev_name[20];
sprintf(dev_name, "%s%d", argv[1], (i+1));
pr = blkid_new_probe_from_filename(dev_name);
blkid_do_probe(pr);
blkid_probe_lookup_value(pr, "UUID", &uuid, NULL);
blkid_probe_lookup_value(pr, "LABEL", &label, NULL);
blkid_probe_lookup_value(pr, "TYPE", &type, NULL);
printf("Name=%s, UUID=%s, LABEL=%s, TYPE=%s\n", dev_name, uuid, label, type);
}
blkid_free_probe(pr);
return 0;
}
Using:
gcc -o getuuid getuuid.c -lblkid
sudo ./getuuid /dev/sdc
Number of partitions:1
Name=/dev/sdc1, UUID=754A-CE25, LABEL=KINGSTON, TYPE=vfat