manual/examples/filecli.c

   1 #include <stdio.h>
   2 #include <errno.h>
   3 #include <unistd.h>
   4 #include <stdlib.h>
   5 #include <sys/socket.h>
   6 #include <sys/un.h>
   7
   8 #define SERVER  "/tmp/serversocket"
   9 #define CLIENT  "/tmp/mysocket"
  10 #define MAXMSG  512
  11 #define MESSAGE "Yow!!! Are we having fun yet?!?"
  12
  13 int
  14 main (void)
  15 {
  16   extern int make_named_socket (const char *name);
  17   int sock;
  18   char message[MAXMSG];
  19   struct sockaddr_un name;
  20   size_t size;
  21   int nbytes;
  22
  23   /* Make the socket. */
  24   sock = make_named_socket (CLIENT);
  25
  26   /* Initialize the server socket address. */
  27   name.sun_family = AF_LOCAL;
  28   strcpy (name.sun_path, SERVER);
  29   size = strlen (name.sun_path) + sizeof (name.sun_family);
  30
  31   /* Send the datagram. */
  32   nbytes = sendto (sock, MESSAGE, strlen (MESSAGE) + 1, 0,
  33                    (struct sockaddr *) & name, size);
  34   if (nbytes < 0)
  35     {
  36       perror ("sendto (client)");
  37       exit (EXIT_FAILURE);
  38     }
  39
  40   /* Wait for a reply. */
  41   nbytes = recvfrom (sock, message, MAXMSG, 0, NULL, 0);
  42   if (nbytes < 0)
  43     {
  44       perror ("recfrom (client)");
  45       exit (EXIT_FAILURE);
  46     }
  47
  48   /* Print a diagnostic message. */
  49   fprintf (stderr, "Client: got message: %s\n", message);
  50
  51   /* Clean up. */
  52   remove (CLIENT);
  53   close (sock);
  54 }