73 lines
2.7 KiB
C
73 lines
2.7 KiB
C
/* $NetBSD: secure_path.c,v 1.2 2003/01/06 20:30:30 wiz Exp $ */
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/*-
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* Copyright (c) 1995,1997 Berkeley Software Design, Inc. 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 Berkeley Software Design,
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* Inc.
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* 4. The name of Berkeley Software Design, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN, INC. ``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 BERKELEY SOFTWARE DESIGN, INC. 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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* BSDI login_cap.c,v 2.13 1998/02/07 03:17:05 prb Exp
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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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__RCSID("$NetBSD: secure_path.c,v 1.2 2003/01/06 20:30:30 wiz Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <assert.h>
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#include <syslog.h>
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#include <util.h>
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int
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secure_path(const char *path)
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{
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struct stat sb;
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_DIAGASSERT(path != NULL);
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/*
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* If not a regular file, or is owned/writable by someone
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* other than root, quit.
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*/
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if (lstat(path, &sb) < 0)
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/* syslog(LOG_ERR, "cannot stat %s: %m", path) */;
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else if (!S_ISREG(sb.st_mode))
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syslog(LOG_ERR, "%s: not a regular file", path);
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else if (sb.st_uid != 0)
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syslog(LOG_ERR, "%s: not owned by root", path);
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else if ((sb.st_mode & (S_IWGRP | S_IWOTH)) != 0)
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syslog(LOG_ERR, "%s: writable by non-root", path);
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else
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return (0);
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return (-1);
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}
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