glibc/stdio-common/tempnam.c
Ulrich Drepper e5448d7ad2 Update.
2000-09-26  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/gethostid.c (sethostid): Use O_TRUNC to
	remove possible garbage at the end of the file.

	* stdio-common/tmpnam_r.c: Warn about insecure tmpnam_r.
	* stdio-common/tmpnam.c: Warn about insecure tmpnam.
	* stdio-common/tempnam.c: Warn about insecure tempnam.
	* misc/mktemp.c: Warn about insecure mktemp.
2000-09-26 07:18:57 +00:00

45 lines
1.7 KiB
C

/* Copyright (C) 1991,1993,1996-1999,2000 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 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 writable 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, __GT_NOCREATE))
return NULL;
return __strdup (buf);
}
link_warning (tempnam,
"the use of `tempnam' is dangerous, better use `mkstemp'")