Linux C编程：如何获取设备的分区信息？

这是获取分区的uuid的示例：Using libblkid to find UUID of a partition.

我将上面显示的代码和libblkid参考菜单中的示例结合起来并生成以下工作程序：

#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]);
   }

   // Get number of partitions
   blkid_partlist ls;
   int nparts,i;

   ls = blkid_probe_get_partitions(pr);
   nparts = blkid_partlist_numof_partitions(ls);
   printf("Number of partitions:%dn",nparts);

   if (nparts <= 0){
      printf("Please enter correct device name! e.g. "/dev/sdc"n");
      return;
   }

   // Get UUID,label and type
   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,"TYPE",&type,NULL);

      printf("Name=%s,UUID=%s,LABEL=%s,TYPE=%sn",dev_name,uuid,label,type);

   }

   blkid_free_probe(pr);

   return 0;
}

用法：

gcc -o getuuid getuuid.c -lblkid
sudo ./getuuid /dev/sdc
Number of partitions:1
Name=/dev/sdc1,UUID=754A-CE25,LABEL=KINGSTON,TYPE=vfat