50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* Copyright (C) 1991, 1993, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <stdio.h>
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#include <string.h>
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/* Generate a unique filename in P_tmpdir.
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This function is *not* thread safe! */
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char *
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tmpnam (char *s)
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{
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/* By using two buffers we manage to be thread safe in the case
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where S != NULL. */
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static char buf[L_tmpnam];
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char tmpbuf[L_tmpnam];
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char *result;
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/* In the following call we use the buffer pointed to by S if
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non-NULL although we don't know the size. But we limit the size
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to FILENAME_MAX characters in any case. */
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result = __stdio_gen_tempname (s ?: tmpbuf, L_tmpnam, (const char *) NULL,
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(const char *) NULL, 0,
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(size_t *) NULL, (FILE **) NULL);
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if (result != NULL && s == NULL)
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{
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memcpy (buf, result, L_tmpnam);
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result = buf;
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}
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return result;
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}
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