xref: /illumos-gate/usr/src/lib/libnsl/dial/strsave.c (revision 1da57d55)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate  * with the License.
87c478bd9Sstevel@tonic-gate  *
97c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate  * and limitations under the License.
137c478bd9Sstevel@tonic-gate  *
147c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate  *
207c478bd9Sstevel@tonic-gate  * CDDL HEADER END
217c478bd9Sstevel@tonic-gate  */
2261961e0fSrobinson 
2361961e0fSrobinson /*
24*e8031f0aSraf  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
2561961e0fSrobinson  * Use is subject to license terms.
2661961e0fSrobinson  */
2761961e0fSrobinson 
287c478bd9Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
297c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
307c478bd9Sstevel@tonic-gate 
31*e8031f0aSraf #include "mt.h"
327c478bd9Sstevel@tonic-gate #include "uucp.h"
337c478bd9Sstevel@tonic-gate 
347c478bd9Sstevel@tonic-gate /* copy str into data space -- caller should report errors. */
357c478bd9Sstevel@tonic-gate 
3661961e0fSrobinson static char *
strsave(const char * str)3761961e0fSrobinson strsave(const char *str)
387c478bd9Sstevel@tonic-gate {
3961961e0fSrobinson 	char *rval;
407c478bd9Sstevel@tonic-gate 
417c478bd9Sstevel@tonic-gate 	rval = malloc(strlen(str) + 1);
427c478bd9Sstevel@tonic-gate 	if (rval != 0)
4361961e0fSrobinson 		(void) strcpy(rval, str);
447c478bd9Sstevel@tonic-gate 	return (rval);
457c478bd9Sstevel@tonic-gate }
467c478bd9Sstevel@tonic-gate 
4761961e0fSrobinson /*
4861961e0fSrobinson  * Determine if the effective user id has the appropriate permission
4961961e0fSrobinson  *	on a file.  Modeled after access(2).
5061961e0fSrobinson  *	amode:
5161961e0fSrobinson  *		00	just checks for file existence.
5261961e0fSrobinson  *		04	checks read permission.
5361961e0fSrobinson  *		02	checks write permission.
5461961e0fSrobinson  *		01	checks execute/search permission.
5561961e0fSrobinson  *		other bits are ignored quietly.
5661961e0fSrobinson  */
577c478bd9Sstevel@tonic-gate 
5861961e0fSrobinson static int
eaccess(char * path,mode_t amode)5961961e0fSrobinson eaccess(char *path, mode_t amode)
607c478bd9Sstevel@tonic-gate {
617c478bd9Sstevel@tonic-gate 	struct stat	s;
627c478bd9Sstevel@tonic-gate 	uid_t euid;
637c478bd9Sstevel@tonic-gate 
64*e8031f0aSraf 	if (stat(path, &s) == -1)
657c478bd9Sstevel@tonic-gate 		return (-1);		/* can't stat file */
667c478bd9Sstevel@tonic-gate 	amode &= 07;
677c478bd9Sstevel@tonic-gate 
6861961e0fSrobinson 	if ((euid = geteuid()) == 0)		/* root can do all */
6961961e0fSrobinson 		return (0);
707c478bd9Sstevel@tonic-gate 	if (euid == s.st_uid)
717c478bd9Sstevel@tonic-gate 	    s.st_mode >>= 6;		/* use owner bits */
727c478bd9Sstevel@tonic-gate 	else if (getegid() == s.st_gid)
737c478bd9Sstevel@tonic-gate 	    s.st_mode >>= 3;		/* use group bits */
747c478bd9Sstevel@tonic-gate 
7561961e0fSrobinson 	if ((amode & s.st_mode) == amode)
767c478bd9Sstevel@tonic-gate 		return (0);		/* access permitted */
777c478bd9Sstevel@tonic-gate 	errno = EACCES;
787c478bd9Sstevel@tonic-gate 	return (-1);
797c478bd9Sstevel@tonic-gate }
80