devname.c

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <blkid/blkid.h> /* Linux, requires libblkid-dev on Debian/Ubuntu */

/* Small program to print the device name that a file resides on.
   Uses stat to get the device id then devname or blkid_devno_to_devname
   to convert the dev id to a device name */
int main(int argc, char **argv)
{
    struct stat s;
    char *name;
    
    if(argc < 1) {
        printf("Usage: %s file\n", argv[0]);
        return EXIT_FAILURE; 
    }
    
    
    
    if(lstat(argv[1], &s) != 0) {
        printf("Unable to stat %s\n", argv[1]);
        return EXIT_FAILURE;
    }
    
    /* BSD */
    /*name = devname(s.st_dev, S_IFBLK);*/
    name = blkid_devno_to_devname(s.st_dev);
    if(name == NULL) {
        printf("Unable to get devname\n");
        return EXIT_FAILURE;
    }
    
    printf("%s\n", name);
    
    return EXIT_SUCCESS;
}

/* Compile on Linux: gcc -o devname -Wall -lblkid dev.c
       Mac OS X/BSD: gcc -o devname -Wall dev.c */