xref: /illumos-gate/usr/src/cmd/bnu/strsave.c (revision 7c478bd9)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23*7c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
24*7c478bd9Sstevel@tonic-gate 
25*7c478bd9Sstevel@tonic-gate 
26*7c478bd9Sstevel@tonic-gate #ident	"%Z%%M%	%I%	%E% SMI"	/* from SVR4 bnu:strsave.c 1.5 */
27*7c478bd9Sstevel@tonic-gate 
28*7c478bd9Sstevel@tonic-gate #include "uucp.h"
29*7c478bd9Sstevel@tonic-gate 
30*7c478bd9Sstevel@tonic-gate /* #include <errno.h> */
31*7c478bd9Sstevel@tonic-gate /* #include <malloc.h> */
32*7c478bd9Sstevel@tonic-gate /* #include <string.h> */
33*7c478bd9Sstevel@tonic-gate /* #include <sys/types.h> */
34*7c478bd9Sstevel@tonic-gate /* #include <sys/stat.h> */
35*7c478bd9Sstevel@tonic-gate 
36*7c478bd9Sstevel@tonic-gate /* copy str into data space -- caller should report errors. */
37*7c478bd9Sstevel@tonic-gate 
38*7c478bd9Sstevel@tonic-gate GLOBAL char *
strsave(str)39*7c478bd9Sstevel@tonic-gate strsave(str)
40*7c478bd9Sstevel@tonic-gate register char *str;
41*7c478bd9Sstevel@tonic-gate {
42*7c478bd9Sstevel@tonic-gate 	register char *rval;
43*7c478bd9Sstevel@tonic-gate 
44*7c478bd9Sstevel@tonic-gate 	rval = (char *)malloc(strlen(str) + 1);
45*7c478bd9Sstevel@tonic-gate 	if (rval != 0)
46*7c478bd9Sstevel@tonic-gate 		strcpy(rval, str);
47*7c478bd9Sstevel@tonic-gate 	return(rval);
48*7c478bd9Sstevel@tonic-gate }
49*7c478bd9Sstevel@tonic-gate 
50*7c478bd9Sstevel@tonic-gate /*	Determine if the effective user id has the appropriate permission
51*7c478bd9Sstevel@tonic-gate 	on a file.  Modeled after access(2).
52*7c478bd9Sstevel@tonic-gate 	amode:
53*7c478bd9Sstevel@tonic-gate 		00	just checks for file existence.
54*7c478bd9Sstevel@tonic-gate 		04	checks read permission.
55*7c478bd9Sstevel@tonic-gate 		02	checks write permission.
56*7c478bd9Sstevel@tonic-gate 		01	checks execute/search permission.
57*7c478bd9Sstevel@tonic-gate 		other bits are ignored quietly.
58*7c478bd9Sstevel@tonic-gate */
59*7c478bd9Sstevel@tonic-gate 
60*7c478bd9Sstevel@tonic-gate GLOBAL int
eaccess(path,amode)61*7c478bd9Sstevel@tonic-gate eaccess( path, amode )
62*7c478bd9Sstevel@tonic-gate char		*path;
63*7c478bd9Sstevel@tonic-gate register mode_t	amode;
64*7c478bd9Sstevel@tonic-gate {
65*7c478bd9Sstevel@tonic-gate 	struct stat	s;
66*7c478bd9Sstevel@tonic-gate 	uid_t euid;
67*7c478bd9Sstevel@tonic-gate 
68*7c478bd9Sstevel@tonic-gate 	if( stat( path, &s ) == -1 )
69*7c478bd9Sstevel@tonic-gate 		return(-1);		/* can't stat file */
70*7c478bd9Sstevel@tonic-gate 	amode &= 07;
71*7c478bd9Sstevel@tonic-gate 
72*7c478bd9Sstevel@tonic-gate 	if( (euid = geteuid()) == 0 )
73*7c478bd9Sstevel@tonic-gate 	    return(0);			/* root can do all */
74*7c478bd9Sstevel@tonic-gate 	if( euid == s.st_uid )
75*7c478bd9Sstevel@tonic-gate 	    s.st_mode >>= 6;		/* use owner bits */
76*7c478bd9Sstevel@tonic-gate 	else if( getegid() == s.st_gid )
77*7c478bd9Sstevel@tonic-gate 	    s.st_mode >>= 3;		/* use group bits */
78*7c478bd9Sstevel@tonic-gate 
79*7c478bd9Sstevel@tonic-gate 	if( (amode & s.st_mode) == amode )
80*7c478bd9Sstevel@tonic-gate 		return(0);		/* access permitted */
81*7c478bd9Sstevel@tonic-gate 	errno = EACCES;
82*7c478bd9Sstevel@tonic-gate 	return(-1);
83*7c478bd9Sstevel@tonic-gate }
84