mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 15:20:10 +00:00
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* Copyright (C) 1991, 1993, 1996 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., 675 Mass Ave,
|
|
Cambridge, MA 02139, 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);
|
|
|
|
if (result != NULL && s == NULL)
|
|
{
|
|
memcpy (buf, result, L_tmpnam);
|
|
result = buf;
|
|
}
|
|
|
|
return result;
|
|
}
|