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

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• Hash : 2966d0d2
  Author :
  Date : 2009-12-08T06:13:05
  

  fchdir: fix logic bugs
  
  Configuring with ac_cv_func_fchdir=no on a system that has fchdir
  and where open handles directories, just to test out the replacement
  capabilities, uncovered an m4 test bug and a link failure on rpl_fstat.
  
  * m4/fchdir.m4 (gl_FUNC_FCHDIR): Fix logic bug.
  * tests/test-fchdir.c (main): Enhance test.
  * lib/fchdir.c (rpl_fstat): Always provide if fchdir replacement
  is in use.
  
  Signed-off-by: Eric Blake <ebb9@byu.net>
  

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• tests/test-fchdir.c

• /* Test changing to a directory named by a file descriptor.
     Copyright (C) 2009 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/>.  */
  
  /* Written by Eric Blake <ebb9@byu.net>, 2009.  */
  
  #include <config.h>
  
  #include <unistd.h>
  
  #include <errno.h>
  #include <fcntl.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "cloexec.h"
  
  #define ASSERT(expr) \
    do									     \
      {									     \
        if (!(expr))							     \
          {								     \
            fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
            fflush (stderr);						     \
            abort ();							     \
          }								     \
      }									     \
    while (0)
  
  int
  main (void)
  {
    char *cwd = getcwd (NULL, 0);
    int fd = open (".", O_RDONLY);
    int i;
  
    ASSERT (cwd);
    ASSERT (0 <= fd);
  
    /* Check for failure cases.  */
    {
      int bad_fd = open ("/dev/null", O_RDONLY);
      ASSERT (0 <= bad_fd);
      errno = 0;
      ASSERT (fchdir (bad_fd) == -1);
      ASSERT (errno == ENOTDIR);
      ASSERT (close (bad_fd) == 0);
      errno = 0;
      ASSERT (fchdir (-1) == -1);
      ASSERT (errno == EBADF);
    }
  
    /* Repeat test twice, once in '.' and once in '..'.  */
    for (i = 0; i < 2; i++)
      {
        ASSERT (chdir (".." + 1 - i) == 0);
        ASSERT (fchdir (fd) == 0);
        {
  	size_t len = strlen (cwd) + 1;
  	char *new_dir = malloc (len);
  	ASSERT (new_dir);
  	ASSERT (getcwd (new_dir, len) == new_dir);
  	ASSERT (strcmp (cwd, new_dir) == 0);
  	free (new_dir);
        }
  
        /* For second iteration, use a cloned fd, to ensure that dup
  	 remembers whether an fd was associated with a directory.  */
        if (!i)
  	{
  	  int new_fd = dup (fd);
  	  ASSERT (0 <= new_fd);
  	  ASSERT (close (fd) == 0);
  	  ASSERT (dup2 (new_fd, fd) == fd);
  	  ASSERT (close (new_fd) == 0);
  	  ASSERT (dup_cloexec (fd) == new_fd);
  	  ASSERT (dup2 (new_fd, fd) == fd);
  	  ASSERT (close (new_fd) == 0);
  	}
      }
  
    free (cwd);
    return 0;
  }
  

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