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/* Invoke openat, but avoid some glitches.
Copyright (C) 2005-2006, 2008-2020 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 Paul Eggert for open, ported by Eric Blake for openat. */
#include <config.h>
#include "fcntl-safer.h"
#include <fcntl.h>
#include <stdarg.h>
#include "unistd-safer.h"
int
openat_safer (int fd, char const *file, int flags, ...)
{
mode_t mode = 0;
if (flags & O_CREAT)
{
va_list ap;
va_start (ap, flags);
/* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
creates crashing code when 'mode_t' is smaller than 'int'. */
mode = va_arg (ap, PROMOTED_MODE_T);
va_end (ap);
}
return fd_safer (openat (fd, file, flags, mode));
}
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