1 /* Open a descriptor to a file.
2 Copyright (C) 2007 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
24 /* If the fchdir replacement is used, open() is defined in fchdir.c. */
25 #ifndef FCHDIR_REPLACEMENT
29 # include <sys/types.h>
30 # include <sys/stat.h>
33 open (const char *filename, int flags, ...)
42 va_start (arg, flags);
44 /* If mode_t is narrower than int, use the promoted type (int),
45 not mode_t. Use sizeof to guess whether mode_t is narrower;
46 we don't know of any practical counterexamples. */
47 mode = (sizeof (mode_t) < sizeof (int)
49 : va_arg (arg, mode_t));
54 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
55 if (strcmp (filename, "/dev/null") == 0)
59 return open (filename, flags, mode);