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/* Open a descriptor to a file.
Copyright (C) 2007 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. */
#include <config.h>
/* Specification. */
#include <fcntl.h>
/* If the fchdir replacement is used, open() is defined in fchdir.c. */
#ifndef FCHDIR_REPLACEMENT
# include <stdarg.h>
# include <string.h>
# include <sys/types.h>
# include <sys/stat.h>
int
open (const char *filename, int flags, ...)
# undef open
{
mode_t mode;
mode = 0;
if (flags & O_CREAT)
{
va_list arg;
va_start (arg, flags);
/* If mode_t is narrower than int, use the promoted type (int),
not mode_t. Use sizeof to guess whether mode_t is narrower;
we don't know of any practical counterexamples. */
mode = (sizeof (mode_t) < sizeof (int)
? va_arg (arg, int)
: va_arg (arg, mode_t));
va_end (arg);
}
# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
if (strcmp (filename, "/dev/null") == 0)
filename = "NUL";
# endif
return open (filename, flags, mode);
}
#endif
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