103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
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/* $NetBSD: tempnam.c,v 1.21 2009/10/25 20:44:13 christos Exp $ */
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/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)tempnam.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: tempnam.c,v 1.21 2009/10/25 20:44:13 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/param.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <paths.h>
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#include "reentrant.h"
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#include "local.h"
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__warn_references(tempnam,
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"warning: tempnam() possibly used unsafely, use mkstemp() or mkdtemp()")
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static const char *
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trailsl(const char *f)
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{
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const char *s = f;
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while (*s)
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s++;
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return (f != s && s[-1] == '/') ? "" : "/";
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}
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static char *
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gentemp(char *name, size_t len, const char *tmp, const char *pfx)
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{
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(void)snprintf(name, len, "%s%s%sXXXXXXXXXX", tmp, trailsl(tmp), pfx);
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return _mktemp(name);
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}
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char *
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tempnam(const char *dir, const char *pfx)
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{
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int sverrno;
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char *name, *f;
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const char *tmp;
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if (!(name = malloc((size_t)MAXPATHLEN)))
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return NULL;
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if (!pfx)
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pfx = "tmp.";
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if ((tmp = getenv("TMPDIR")) != NULL &&
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(f = gentemp(name, (size_t)MAXPATHLEN, tmp, pfx)) != NULL)
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return f;
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if (dir != NULL &&
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(f = gentemp(name, (size_t)MAXPATHLEN, dir, pfx)) != NULL)
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return f;
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if ((f = gentemp(name, (size_t)MAXPATHLEN, P_tmpdir, pfx)) != NULL)
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return f;
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if ((f = gentemp(name, (size_t)MAXPATHLEN, _PATH_TMP, pfx)) != NULL)
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return f;
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sverrno = errno;
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free(name);
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errno = sverrno;
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return(NULL);
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}
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