Attachment 87547 Details for Bug 69492 – test_SO_REUSEADDR_AF_UNIX.c

test_SO_REUSEADDR_AF_UNIX.c

test_SO_REUSEADDR_AF_UNIX.c (text/x-csrc), 2.26 KB, created by Svante Signell on 2013-10-13 10:19:22 UTC

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Creator: Svante Signell

Created: 2013-10-13 10:19:22 UTC

Size: 2.26 KB

patch

obsolete

>#include <sys/types.h>
>#include <sys/socket.h>
>#include <sys/un.h>
>#include <sys/stat.h>
>#include <unistd.h>
>#include <stdlib.h>
>#include <stdio.h>
>#include <string.h>
>#include <errno.h>
>
>int main()
>{
>  int fd;
>  struct sockaddr_un addr;
>  size_t slen = sizeof (addr);
>
>  /* Create the socket node
>   * ----------------------
>   * Note `SO_REUSEADDR` does not work with `AF_UNIX` sockets,
>   * so we will have to unlink the socket node if it already exists,
>   * before we bind. For safety, we won't unlink an already existing node
>   * which is not a socket node. 
>   */
>
>  fd = socket(AF_UNIX, SOCK_STREAM, 0);
>
>  if (fd < 0)
>    {
>      fprintf (stderr, "socket() failed: %s\n", strerror (errno));
>      exit (1);
>    }
>  fprintf (stdout, "fd=%d\n", fd);
>
>  int reuseaddr = 1;
>  setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr, sizeof(reuseaddr));
> 
>  memset (&addr, '\0', sizeof (addr));
>  addr.sun_family = AF_UNIX;
>  strcpy (addr.sun_path, "/tmp/test_socket");
>  char *path = addr.sun_path;
>  fprintf (stdout, "addr.sun_path=%s\n", addr.sun_path);
>  fprintf (stdout, "socket path=%s\n", path);
>
>#if 0
>  struct stat st;
>  int status = stat (path, &st);
>  if (status == 0) {
>    /* A file already exists. Check if this file is a socket node.
>     *   * If yes: unlink it.
>     *   * If no: treat it as an error condition.
>     */
>    if ((st.st_mode & S_IFMT) == S_IFSOCK) {
>      status = unlink (path);
>      if (status != 0) {
>	perror ("Error unlinking the socket node");
>	exit (1);
>      }
>    }
>    else {
>      /* We won't unlink to create a socket in place of who-know-what.
>       * Note: don't use `perror` here, as `status == 0` (this is an
>       * error we've defined, not an error returned by a system-call).
>       */
>      fprintf (stderr, "The path already exists and is not a socket node.\n");
>      exit (1);
>    }
>  }
>  else {
>    if (errno == ENOENT) {
>      /* No file of the same path: do nothing. */
>    }
>    else {
>      perror ("Error stating the socket node path");
>      exit (1);
>    }
>  }
>#endif
>
>  /* â¦ invoke `bind` here, which will create the socket node â¦ */
>  if (bind (fd, (struct sockaddr*) &addr, slen) < 0)
>    {
>       fprintf (stderr, "bind() failed: %s\n",
>                strerror (errno));
>       exit (1);
>    }
>  fprintf(stdout,"Success\n");
>  return 0;
>}
>

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Attachments on bug 69492: 86021 | 86076 | 86077 | 87546 | 87547 | 87548 | 88478

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