Bug#1008507:

[Joshua Hudson]

/* reproduce glibc bug */

/*
 * I don't typically care what the return of pathconf(..., _PC_LINK_MAX)
 * is; I just care whether or not it's greater than 1 because I'm checking
 * whether the filesystem supports hard links or not.
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>

int main()
{
    char file[40];
    char dir[40];
    char commandbuf[120];
    sprintf(file, "/tmp/%u.img", getpid());
    sprintf(dir, "/tmp/%u.mnt", getpid());
    FILE *fimage = fopen(file, "wb");
    fseek(fimage, 1440 * 1024 - 1, SEEK_SET);
    fputc(0, fimage);
    fclose(fimage);
    mkdir(dir, 0);
    sprintf(commandbuf, "mkfs.fat /tmp/%u.img", getpid());
    if (system(commandbuf) != 0) {
        rmdir(dir);
        unlink(file);
        return 1;
    }

    sprintf(commandbuf, "mount -o loop -t msdos %s %s", file, dir);
    if (system(commandbuf) != 0) {
        rmdir(dir);
        unlink(file);
        return 1;
    }

    int r;
    printf("Testing pathconf(%s, _PC_LINK_MAX)...");
    r = pathconf(dir, _PC_LINK_MAX) != 1;
    printf(r ? "Failed\n" : "OK\n");
    sprintf(commandbuf, "umount %s", dir);
    system(commandbuf);
    rmdir(dir);
    unlink(file);
    return r;
}