028aace8e1
these are inherently unsafe interfaces. Do not allow TMPDIR to override path for setuid/setgid programs.
97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#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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#endif
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static const char rcsid[] =
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"$Id: tempnam.c,v 1.5 1997/02/22 15:02:37 peter Exp $";
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#endif /* LIBC_SCCS and not lint */
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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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__warn_references(tempnam,
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"warning: tempnam() possibly used unsafely; consider using mkstemp()");
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extern char *_mktemp __P((char *));
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char *
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tempnam(dir, pfx)
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const char *dir, *pfx;
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{
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int sverrno;
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char *f, *name;
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if (!(name = malloc(MAXPATHLEN)))
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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"))) {
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(void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f,
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*(f + strlen(f) - 1) == '/'? "": "/", pfx);
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if ((f = _mktemp(name)))
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return(f);
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}
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if ((f = (char *)dir)) {
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(void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXX", f,
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*(f + strlen(f) - 1) == '/'? "": "/", pfx);
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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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(void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx);
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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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(void)snprintf(name, MAXPATHLEN, "%s%sXXXXXX", f, pfx);
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if ((f = mktemp(name)))
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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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