inetcli.c.texi

来自「一个C源代码分析器」· TEXI 代码 · 共 60 行

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

#define PORT            5555
#define MESSAGE         "Yow!!! Are we having fun yet?!?"
#define SERVERHOST      "churchy.gnu.ai.mit.edu"

void 
write_to_server (int filedes)
@{
  int nbytes;

  nbytes = write (filedes, MESSAGE, strlen (MESSAGE) + 1);
  if (nbytes < 0)
    @{
      perror ("write");
      exit (EXIT_FAILURE);
    @}
@}


int
main (void)
@{
  extern void init_sockaddr (struct sockaddr_in *name,
                             const char *hostname,
                             unsigned short int port);
  int sock;
  struct sockaddr_in servername;

  /* @r{Create the socket.} */
  sock = socket (PF_INET, SOCK_STREAM, 0);
  if (sock < 0)
    @{
      perror ("socket (client)");
      exit (EXIT_FAILURE);
    @}

  /* @r{Connect to the server.} */
  init_sockaddr (&servername, SERVERHOST, PORT);
  if (0 > connect (sock,
                   (struct sockaddr *) &servername,
                   sizeof (servername)))
    @{
      perror ("connect (client)");
      exit (EXIT_FAILURE);
    @}

  /* @r{Send data to the server.} */
  write_to_server (sock);
  close (sock);
  exit (EXIT_SUCCESS);
@}