/* Copyright (C) 1991, 1993, 1996, 1997 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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <stdio.h> #include <string.h> /* Generate a unique filename in P_tmpdir. This function is *not* thread safe! */ char * tmpnam (char *s) { /* By using two buffers we manage to be thread safe in the case where S != NULL. */ static char buf[L_tmpnam]; char tmpbuf[L_tmpnam]; char *result; /* In the following call we use the buffer pointed to by S if non-NULL although we don't know the size. But we limit the size to FILENAME_MAX characters in any case. */ result = __stdio_gen_tempname (s ?: tmpbuf, L_tmpnam, (const char *) NULL, (const char *) NULL, 0, (size_t *) NULL, (FILE **) NULL, 0); if (result != NULL && s == NULL) { memcpy (buf, result, L_tmpnam); result = buf; } return result; }