kc3-lang/gnulib/tests/test-open.h

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• Hash : 70a72e0f
  Author :
  Date : 2011-04-08T10:15:54
  

  nonblocking: provide O_NONBLOCK for mingw
  
  Mingw is the only known platform that lacks O_NONBLOCK (possibly
  via the alternate spelling O_NDELAY).  But mingw also lacks any
  files where open() needs to enforce non-blocking behavior, and
  lacks openat(), so it is relatively simple to provide a non-zero
  flag.  A future patches will make use of O_NONBLOCK for pipe2.
  
  * modules/nonblocking (Depends-on): Add open.
  (configure.ac): Set new witness macro.
  * m4/fcntl_h.m4 (gl_FCNTL_H_DEFAULTS): Provide default for it.
  * modules/fcntl-h (Makefile.am): Substitute it.
  * lib/fcntl.in.h (O_NONBLOCK): Guarantee non-zero definition when
  nonblocking module is in use.
  * lib/nonblocking.c: Adjust portability test.
  * lib/open.c (open): Don't let native open see gnulib flag.
  * tests/test-fcntl-h.c (main): Enhance test.
  * tests/test-open.h (test_open): Likewise.
  * doc/posix-headers/fcntl.texi (fcntl.h): Document the replacement.
  
  Signed-off-by: Eric Blake <eblake@redhat.com>
  

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• tests/test-open.h

• /* Test of opening a file descriptor.
     Copyright (C) 2007-2011 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/>.  */
  
  /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  
  /* This file is designed to test both open(n,buf[,mode]) and
     openat(AT_FDCWD,n,buf[,mode]).  FUNC is the function to test.
     Assumes that BASE and ASSERT are already defined, and that
     appropriate headers are already included.  If PRINT, warn before
     skipping symlink tests with status 77.  */
  
  static int
  test_open (int (*func) (char const *, int, ...), bool print)
  {
    int fd;
    /* Remove anything from prior partial run.  */
    unlink (BASE "file");
  
    /* Cannot create directory.  */
    errno = 0;
    ASSERT (func ("nonexist.ent/", O_CREAT | O_RDONLY, 0600) == -1);
    ASSERT (errno == ENOTDIR || errno == EISDIR || errno == ENOENT
            || errno == EINVAL);
  
    /* Create a regular file.  */
    fd = func (BASE "file", O_CREAT | O_RDONLY, 0600);
    ASSERT (0 <= fd);
    ASSERT (close (fd) == 0);
  
    /* Trailing slash handling.  */
    errno = 0;
    ASSERT (func (BASE "file/", O_RDONLY) == -1);
    ASSERT (errno == ENOTDIR || errno == EISDIR || errno == EINVAL);
  
    /* Directories cannot be opened for writing.  */
    errno = 0;
    ASSERT (func (".", O_WRONLY) == -1);
    ASSERT (errno == EISDIR || errno == EACCES);
  
    /* /dev/null must exist, and be writable.  */
    fd = func ("/dev/null", O_RDONLY);
    ASSERT (0 <= fd);
    {
      char c;
      ASSERT (read (fd, &c, 1) == 0);
    }
    ASSERT (close (fd) == 0);
    fd = func ("/dev/null", O_WRONLY);
    ASSERT (0 <= fd);
    ASSERT (write (fd, "c", 1) == 1);
    ASSERT (close (fd) == 0);
  
    /* Although O_NONBLOCK on regular files can be ignored, it must not
       cause a failure.  */
    fd = func (BASE "file", O_NONBLOCK | O_RDONLY);
    ASSERT (0 <= fd);
    ASSERT (close (fd) == 0);
  
    /* Symlink handling, where supported.  */
    if (symlink (BASE "file", BASE "link") != 0)
      {
        ASSERT (unlink (BASE "file") == 0);
        if (print)
          fputs ("skipping test: symlinks not supported on this file system\n",
                 stderr);
        return 77;
      }
    errno = 0;
    ASSERT (func (BASE "link/", O_RDONLY) == -1);
    ASSERT (errno == ENOTDIR);
    fd = func (BASE "link", O_RDONLY);
    ASSERT (0 <= fd);
    ASSERT (close (fd) == 0);
  
    /* Cleanup.  */
    ASSERT (unlink (BASE "file") == 0);
    ASSERT (unlink (BASE "link") == 0);
  
    return 0;
  }
  

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