#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/un.h>
#include <sys/socket.h>

#define SV_SOCK_PATH "/tmp/waitall"

#define BUF_SIZE 10

#define BACKLOG 5

int
main ()
{
    struct sockaddr_un addr;
    int sfd, cfd;
    ssize_t nread;
    char buf[BUF_SIZE];

    if ((sfd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
      {
	perror ("socket");
	exit (1);
      }
    if (remove (SV_SOCK_PATH) < 0 && errno != ENOENT)
      {
	perror ("remove");
        exit (1);
      }

    memset (&addr, 0, sizeof (struct sockaddr_un));
    addr.sun_family = AF_UNIX;
    strncpy (addr.sun_path, SV_SOCK_PATH, sizeof (addr.sun_path) - 1);

    if (bind (sfd, (struct sockaddr *) &addr, sizeof (struct sockaddr_un)) < 0)
      {
	perror ("bind");
	exit (1);
      }

    if (listen (sfd, BACKLOG) < 0)
      {
        perror ("listen");
	exit (1);
      }

    while (1)
      {
        cfd = accept (sfd, NULL, NULL);
        if (cfd < 0)
	  {
            perror ("accept");
	    exit (1);
	  }

        /* Transfer data from connected socket to stdout until EOF. */
        while ((nread = recv (cfd, buf, BUF_SIZE, MSG_WAITALL)) > 0)
	  if (write (STDOUT_FILENO, buf, nread) != nread)
	    {
	      perror ("partial/failed write");
	      exit (1);
	    }

        if (nread < 0)
	  {
            perror ("read");
	    exit (1);
	  }

        if (close (cfd) < 0)
	  {
            perror ("close");
	    exit (1);
	  }
      }
}