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

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• Hash : 87555a59
  Author :
  Date : 2025-05-28T10:40:21
  

  open, openat: handle O_DIRECTORY on special files
  
  On deficient platforms where we must check for directories
  ourselves when opening files, check before opening as well as after.
  This prevents a hang when trying to open a special file like a
  fifo in a context where a directory is required.  Although there
  is still a race so we could still hang in a perverse situation,
  it’s the best we can do and it is better than hanging in the
  more-common case.
  * lib/open.c (lstatif): New static function.
  (open) [REPLACE_FCHDIR]: Also inspect O_CREAT.
  * lib/open.c (open), lib/openat.c (rpl_openat):
  When checking for directories, also do this before opening.
  Also, respect O_NOFOLLOW when checking for directories.
  * lib/openat.c: Remove a few more unnecessary differences from open.c.
  * modules/open (Depends-on): Depend on lstat.
  * modules/openat (Depends-on): Add fstatat.
  * modules/open-tests, modules/openat-tests:
  (configure.ac) Check for alarm decl.
  * tests/test-open.c, tests/test-openat.c:
  Include sys/stat.h, for mkfifo.
  [HAVE_DECL_ALARM]: Include signal.h, for alarm.
  * tests/test-open.h (test_open): Fail if test takes too long
  because we tried to open a fifo.  Test opening /dev/null,
  /dev/tty and a fifo, with a trailing "/" and with O_DIRECTORY.
  

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• tests/test-open.c

• /* Test of opening a file descriptor.
     Copyright (C) 2007-2025 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 <https://www.gnu.org/licenses/>.  */
  
  /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  
  #include <config.h>
  
  #include <fcntl.h>
  
  #include "signature.h"
  SIGNATURE_CHECK (open, int, (char const *, int, ...));
  
  #include <errno.h>
  #include <stdio.h>
  #include <sys/stat.h>
  #include <unistd.h>
  
  #if HAVE_DECL_ALARM
  # include <signal.h>
  #endif
  
  #include "macros.h"
  
  #define BASE "test-open.t"
  
  #include "test-open.h"
  
  int
  main (void)
  {
    int result = test_open (open, true);
    return (result ? result : test_exit_status);
  }
  

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