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 2, or (at your option)
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 along
15 with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
25 /* If the fchdir replacement is used, open() is defined in fchdir.c. */
26 #ifndef FCHDIR_REPLACEMENT
30 # include <sys/types.h>
31 # include <sys/stat.h>
34 open (const char *filename, int flags, ...)
43 va_start (arg, flags);
45 /* If mode_t is narrower than int, use the promoted type (int),
46 not mode_t. Use sizeof to guess whether mode_t is narrower;
47 we don't know of any practical counterexamples. */
48 mode = (sizeof (mode_t) < sizeof (int)
50 : va_arg (arg, mode_t));
55 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
56 if (strcmp (filename, "/dev/null") == 0)
60 return open (filename, flags, mode);