sock_un.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stddef.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "error.h"

#define UNIX_DOMAIN_SOCK_NAME "foo.socket"

int main(void)
{
    int fd, size;
    struct sockaddr_un un;

    un.sun_family = AF_UNIX;
    strcpy(un.sun_path, UNIX_DOMAIN_SOCK_NAME);

    if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
        err_sys("socket");

    size = offsetof(struct sockaddr_un, sun_path) + strlen(un.sun_path);
    if (bind(fd, (struct sockaddr*)&un, size) < 0)
        err_sys("bind");
        
    unlink(UNIX_DOMAIN_SOCK_NAME);
    return EXIT_SUCCESS;
}