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

int main()
{
   int pipe_fd, send_size;
   struct sockaddr_un pipe_addr;
   socklen_t pipe_addrlen;
   char buf[100];

   /* creating test unix domain socket pipe */
   pipe_fd = socket(AF_UNIX, SOCK_DGRAM, 0);

   /* SOCK_DGRAM require this to bind */
   bzero((char *)&pipe_addr, sizeof(pipe_addr));

   /* fill in pipe_addr structire */
   pipe_addr.sun_family = AF_UNIX;
   strncpy(pipe_addr.sun_path, "pipe.100", 10);
   pipe_addrlen = sizeof(pipe_addr.sun_family) + strlen(pipe_addr.sun_path) + 1;

   /* unlink old socket file */
   unlink(pipe_addr.sun_path);

   /* bind socket to special file named pipe.100 in current directory */
   bind(pipe_fd, (struct sockaddr *)&pipe_addr, pipe_addrlen);

   /* now we can try to send packet to pipe */
   send_size = sendto(pipe_fd, buf, 100, 0, (struct sockaddr *)&pipe_addr, pipe_addrlen);
   
   if (send_size < 0)
   {
      printf("Can't send packet to pipe...\n");
      printf("Problem: %s\n", strerror(errno));
   }
}