/* Copyright (C) 1991-2020 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #include <stdio.h> #include <string.h> /* Generate a unique temporary filename using up to five characters of PFX if it is not NULL. The directory to put this file in is searched for as follows: First the environment variable "TMPDIR" is checked. If it contains the name of a directory, that directory is used. If not and if DIR is not NULL, that value is checked. If that fails, P_tmpdir is tried and finally "/tmp". The storage for the filename is allocated by `malloc'. */ char * tempnam (const char *dir, const char *pfx) { char buf[FILENAME_MAX]; if (__path_search (buf, FILENAME_MAX, dir, pfx, 1)) return NULL; if (__gen_tempname (buf, 0, 0, __GT_NOCREATE)) return NULL; return __strdup (buf); } link_warning (tempnam, "the use of `tempnam' is dangerous, better use `mkstemp'")