summaryrefslogtreecommitdiff
path: root/libc/stdio/tmpnam.c
diff options
context:
space:
mode:
Diffstat (limited to 'libc/stdio/tmpnam.c')
-rw-r--r--libc/stdio/tmpnam.c83
1 files changed, 33 insertions, 50 deletions
diff --git a/libc/stdio/tmpnam.c b/libc/stdio/tmpnam.c
index 3a3ef67ca..296f67f27 100644
--- a/libc/stdio/tmpnam.c
+++ b/libc/stdio/tmpnam.c
@@ -1,68 +1,51 @@
-/* vi: set sw=4 ts=4: */
-/*
- * tmpnam for uClibc
- *
- * Copyright (C) 2000 by David Whedon <dwhedon@gordian.com>
- *
- * This program 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.
- *
- * 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 Library General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Modified by Erik Andersen <anderse@debian.org> to be reentrant for
- * the case when S != NULL...
- */
+/* Copyright (C) 1991, 1993, 1996, 1997, 1998 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>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
+extern int __path_search (char *tmpl, size_t tmpl_len, const char *dir, const char *pfx,
+ int try_tmpdir);
+extern int __gen_tempname (char *tmpl, int openit);
static char tmpnam_buffer[L_tmpnam];
+/* Generate a unique filename in P_tmpdir.
-/* Generate a unique filename in /tmp */
+ This function is *not* thread safe when S == NULL! */
char * tmpnam (char *s)
{
- int num __attribute__ ((unused)); /* UNINITIALIZED, so we get whatever crap
- happens to be in memory, producing (in theory)
- pseudo-random tmpname results... */
- int n2;
- char buf[L_tmpnam], *ptr;
- struct stat statbuf;
- unsigned char l, i;
-
- ptr=s ? s : buf;
-
- l = snprintf(ptr, L_tmpnam, "%s/tmp.", P_tmpdir);
+ /* By using two buffers we manage to be thread safe in the case
+ where S != NULL. */
+ char tmpbuf[L_tmpnam];
-again:
- n2 = num;
- for (i = l ; i < l + 6; i++) {
- ptr[i] = '0' + n2 % 10;
- n2 /= 10;
- }
+ /* 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 L_tmpnam characters in any case. */
+ if (__path_search (s ? : tmpbuf, L_tmpnam, NULL, NULL, 0))
+ return NULL;
- if (stat (ptr, &statbuf) == 0){
- num++;
- goto again;
- }
+ if (__gen_tempname (s ? : tmpbuf, 0))
+ return NULL;
if (s == NULL)
- return (char *) memcpy (tmpnam_buffer, ptr, L_tmpnam);
+ return (char *) memcpy (tmpnam_buffer, tmpbuf, L_tmpnam);
- return ptr;
+ return s;
}