kc3-lang/gnulib/tests/test-passfd.c

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• Hash : 06d76f63
  Author :
  Date : 2011-04-21T07:16:20
  

  passfd: allow compilation on mingw
  
  The passfd module now skips on mingw, rather than failing to compile.
  
  It may be nice to add a sendmsg and recvmsg module in the future,
  but for now passfd is the only client that cares.
  
  * modules/sys_socket (Depends-on): Add sys_uio.
  * lib/sys_socket.in.h [!@HAVE_SYS_SOCKET_H@]: Use it for struct
  iovec and a minimal struct msghdr.
  * tests/test-sys_socket.c (main): Enhance test.
  * m4/afunix.m4 (gl_SOCKET_AFUNIX): Detect recvmsg/sendmsg.
  * lib/passfd.c (include): Drop <sys/uio.h>; <sys/sockets.h> is
  guaranteed to provide what we need.
  (sendmsg, recvmsg): Declare fallbacks if we lack sendmsg.
  * modules/passfd-tests (Depends-on): Add sys_wait.
  * tests/test-passfd.c (main): Skip test on mingw, for now.
  * doc/posix-headers/sys_socket.texi (sys/socket.h): Document the
  partial 'struct msghdr' implementation.
  
  Signed-off-by: Eric Blake <eblake@redhat.com>
  

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• tests/test-passfd.c

• /* Test of passing file descriptors.
     Copyright (C) 2011 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  #include "passfd.h"
  
  #include <errno.h>
  #include <fcntl.h>
  #include <signal.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <unistd.h>
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <sys/stat.h>
  #include <sys/wait.h>
  
  #include "macros.h"
  
  int
  main ()
  {
  #if HAVE_SOCKETPAIR
    int pair[2];
    int ret;
    pid_t pid;
    int status;
    int fdnull;
    int fd;
    struct stat st;
  
  # if HAVE_DECL_ALARM
    /* Avoid hanging on failure.  */
    signal (SIGALRM, SIG_DFL);
    alarm (5);
  # endif
  
    fdnull = open ("/dev/null", O_RDWR);
    if (fdnull < 0)
      {
        perror ("Could not open /dev/null");
        return 1;
      }
  
    ret = socketpair (AF_UNIX, SOCK_STREAM, 0, pair);
    if (ret < 0)
      {
        perror ("socket pair failed");
        return 2;
      }
  
    pid = fork ();
    if (pid == -1)
      {
        perror ("fork");
        return 3;
      }
    if (pid == 0)
      {
        ret = sendfd (pair[1], fdnull);
        if (ret == -1)
          {
            perror ("sendfd");
            return 64;
          }
        return 0;
      }
    /* father */
    else
      {
        fd = recvfd (pair[0], 0);
        if (fd == -1)
          {
            perror ("recvfd");
            return 16;
          }
        ret = waitpid (pid, &status, 0);
        if (ret == -1)
          {
            perror ("waitpid");
            return 17;
          }
        ASSERT (ret == pid);
  
        if (!WIFEXITED (status))
          {
            fprintf (stderr, "Child does not normally exit\n");
            return 65;
          }
        ret = WEXITSTATUS (status);
        if (ret != 0)
          {
            fprintf (stderr, "Send fd fail\n");
            return ret;
          }
  
        /* try to stat new fd */
        ret = fstat (fd, &st);
        if (ret < 0)
          {
            perror ("fstat");
            return 80;
          }
        return 0;
      }
  #else
    errno = 0;
    ASSERT(sendfd (0, 0) == -1);
    ASSERT(errno == ENOSYS);
  
    errno = 0;
    ASSERT(recvfd (0, 0) == -1);
    ASSERT(errno == ENOSYS);
  
    fputs ("skipping test: socketpair not supported on this system\n",
           stderr);
    return 77;
  #endif
  }
  

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