/* Invoke open, but avoid some glitches. Copyright (C) 2005, 2006 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 2, 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* Written by Paul Eggert. */ #include <config.h> #include "fcntl-safer.h" #include <fcntl.h> #include <stdarg.h> #include "unistd-safer.h" int open_safer (char const *file, int flags, ...) { mode_t mode = 0; if (flags & O_CREAT) { va_list ap; va_start (ap, flags); /* Assume mode_t promotes to int if and only if it is smaller. This assumption isn't guaranteed by the C standard, but we don't know of any real-world counterexamples. */ mode = (sizeof (mode_t) < sizeof (int) ? va_arg (ap, int) : va_arg (ap, mode_t)); va_end (ap); } return fd_safer (open (file, flags, mode)); }