1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23 /*
24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27
28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
29 /* All Rights Reserved */
30
31 #include "mt.h"
32 #include "uucp.h"
33
34 /* copy str into data space -- caller should report errors. */
35
36 static char *
strsave(const char * str)37 strsave(const char *str)
38 {
39 char *rval;
40
41 rval = malloc(strlen(str) + 1);
42 if (rval != 0)
43 (void) strcpy(rval, str);
44 return (rval);
45 }
46
47 /*
48 * Determine if the effective user id has the appropriate permission
49 * on a file. Modeled after access(2).
50 * amode:
51 * 00 just checks for file existence.
52 * 04 checks read permission.
53 * 02 checks write permission.
54 * 01 checks execute/search permission.
55 * other bits are ignored quietly.
56 */
57
58 static int
eaccess(char * path,mode_t amode)59 eaccess(char *path, mode_t amode)
60 {
61 struct stat s;
62 uid_t euid;
63
64 if (stat(path, &s) == -1)
65 return (-1); /* can't stat file */
66 amode &= 07;
67
68 if ((euid = geteuid()) == 0) /* root can do all */
69 return (0);
70 if (euid == s.st_uid)
71 s.st_mode >>= 6; /* use owner bits */
72 else if (getegid() == s.st_gid)
73 s.st_mode >>= 3; /* use group bits */
74
75 if ((amode & s.st_mode) == amode)
76 return (0); /* access permitted */
77 errno = EACCES;
78 return (-1);
79 }
80