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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 * $FreeBSD$
21 */
22
23 /*
24 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27
28 #pragma ident "@(#)chg_usr_exec.c 1.3 07/05/25 SMI"
29
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <unistd.h>
33 #include <string.h>
34 #include <errno.h>
35 #include <pwd.h>
36
37 int
main(int argc,char * argv[])38 main(int argc, char *argv[])
39 {
40 char *plogin = NULL;
41 char cmds[BUFSIZ] = { 0 };
42 char sep[] = " ";
43 struct passwd *ppw = NULL;
44 int i, len;
45
46 if (argc < 3 || strlen(argv[1]) == 0) {
47 (void) printf("\tUsage: %s <login> <commands> ...\n", argv[0]);
48 return (1);
49 }
50
51 plogin = argv[1];
52 len = 0;
53 for (i = 2; i < argc; i++) {
54 (void) snprintf(cmds+len, sizeof (cmds)-len,
55 "%s%s", argv[i], sep);
56 len += strlen(argv[i]) + strlen(sep);
57 }
58
59 if ((ppw = getpwnam(plogin)) == NULL) {
60 perror("getpwnam");
61 return (errno);
62 }
63 if (setgid(ppw->pw_gid) != 0) {
64 perror("setgid");
65 return (errno);
66 }
67 if (setuid(ppw->pw_uid) != 0) {
68 perror("setuid");
69 return (errno);
70 }
71
72 if (execl("/bin/sh", "sh", "-c", cmds, (char *)0) != 0) {
73 perror("execl");
74 return (errno);
75 }
76
77 return (0);
78 }
79