GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/stdio/tempnam.c Lines: 0 30 0.0 %
Date: 2017-11-13 Branches: 0 28 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: tempnam.c,v 1.19 2015/08/31 02:53:57 guenther 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 <errno.h>
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#include <limits.h>
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#include <paths.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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__warn_references(tempnam,
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    "warning: tempnam() possibly used unsafely; consider using mkstemp()");
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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, len;
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	char *f, *name;
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	if (!(name = malloc(PATH_MAX)))
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		return(NULL);
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	if (!pfx)
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		pfx = "tmp.";
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	if (issetugid() == 0 && (f = getenv("TMPDIR")) && *f != '\0') {
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		len = snprintf(name, PATH_MAX, "%s%s%sXXXXXXXXXX", f,
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		    f[strlen(f) - 1] == '/' ? "" : "/", pfx);
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		if (len < 0 || len >= PATH_MAX) {
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			errno = ENAMETOOLONG;
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			goto fail;
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		}
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		if ((f = _mktemp(name)))
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			return(f);
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	}
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	if (dir != NULL) {
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		f = *dir ? (char *)dir : ".";
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		len = snprintf(name, PATH_MAX, "%s%s%sXXXXXXXXXX", f,
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		    f[strlen(f) - 1] == '/' ? "" : "/", pfx);
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		if (len < 0 || len >= PATH_MAX) {
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			errno = ENAMETOOLONG;
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			goto fail;
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		}
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		if ((f = _mktemp(name)))
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			return(f);
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	}
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	f = P_tmpdir;
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	len = snprintf(name, PATH_MAX, "%s%sXXXXXXXXX", f, pfx);
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	if (len < 0 || len >= PATH_MAX) {
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		errno = ENAMETOOLONG;
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		goto fail;
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	}
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	if ((f = _mktemp(name)))
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		return(f);
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	f = _PATH_TMP;
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	len = snprintf(name, PATH_MAX, "%s%sXXXXXXXXX", f, pfx);
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	if (len < 0 || len >= PATH_MAX) {
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		errno = ENAMETOOLONG;
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		goto fail;
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	}
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	if ((f = _mktemp(name)))
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		return(f);
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fail:
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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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}