Line data    Source code

       1             : /* Invoke open, but avoid some glitches.
       2             : 
       3             :    Copyright (C) 2005, 2006 Free Software Foundation, Inc.
       4             : 
       5             :    This program is free software: you can redistribute it and/or modify
       6             :    it under the terms of the GNU General Public License as published by
       7             :    the Free Software Foundation; either version 3 of the License, or
       8             :    (at your option) any later version.
       9             : 
      10             :    This program is distributed in the hope that it will be useful,
      11             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      12             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13             :    GNU General Public License for more details.
      14             : 
      15             :    You should have received a copy of the GNU General Public License
      16             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      17             : 
      18             : /* Written by Paul Eggert.  */
      19             : 
      20             : #include <config.h>
      21             : 
      22             : #include "fcntl-safer.h"
      23             : 
      24             : #include <fcntl.h>
      25             : #include <stdarg.h>
      26             : #include "unistd-safer.h"
      27             : 
      28             : int
      29      135640 : open_safer (char const *file, int flags, ...)
      30             : {
      31      135640 :   mode_t mode = 0;
      32             : 
      33      135640 :   if (flags & O_CREAT)
      34             :     {
      35             :       va_list ap;
      36        1095 :       va_start (ap, flags);
      37             : 
      38             :       /* Assume mode_t promotes to int if and only if it is smaller.
      39             :          This assumption isn't guaranteed by the C standard, but we
      40             :          don't know of any real-world counterexamples.  */
      41        1095 :       mode = (sizeof (mode_t) < sizeof (int)
      42             :               ? va_arg (ap, int)
      43             :               : va_arg (ap, mode_t));
      44             : 
      45        1095 :       va_end (ap);
      46             :     }
      47             : 
      48      135640 :   return fd_safer (open (file, flags, mode));
      49             : }