filecli.c.texi

来自「一个C源代码分析器」· TEXI 代码 · 共 55 行

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

#define SERVER  "/tmp/serversocket"
#define CLIENT  "/tmp/mysocket"
#define MAXMSG  512
#define MESSAGE "Yow!!! Are we having fun yet?!?"

int
main (void)
@{
  extern int make_named_socket (const char *name);
  int sock;
  char message[MAXMSG];
  struct sockaddr_un name;
  size_t size;
  int nbytes;

  /* @r{Make the socket.} */
  sock = make_named_socket (CLIENT);

  /* @r{Initialize the server socket address.} */
  name.sun_family = AF_UNIX;
  strcpy (name.sun_path, SERVER);
  size = strlen (name.sun_path) + sizeof (name.sun_family);

  /* @r{Send the datagram.} */
  nbytes = sendto (sock, MESSAGE, strlen (MESSAGE) + 1, 0,
                   (struct sockaddr *) & name, size);
  if (nbytes < 0)
    @{
      perror ("sendto (client)");
      exit (EXIT_FAILURE);
    @}

  /* @r{Wait for a reply.} */
  nbytes = recvfrom (sock, message, MAXMSG, 0, NULL, 0);
  if (nbytes < 0)
    @{
      perror ("recfrom (client)");
      exit (EXIT_FAILURE);
    @}

  /* @r{Print a diagnostic message.} */
  fprintf (stderr, "Client: got message: %s\n", message);

  /* @r{Clean up.} */
  remove (CLIENT);
  close (sock);
@}