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 */
21 /*
22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
27 /* All Rights Reserved */
28
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <stdio.h>
32 #include <unistd.h>
33 #include <userdefs.h>
34
35 #define GRPTMP "/etc/gtmp"
36 #define GRPBUFSIZ 5120
37
38 int
add_group(group,gid)39 add_group(group, gid)
40 char *group; /* name of group to add */
41 gid_t gid; /* gid of group to add */
42 {
43 FILE *etcgrp; /* /etc/group file */
44 FILE *etctmp; /* temp file */
45 int o_mask; /* old umask value */
46 int newdone = 0; /* set true when new entry done */
47 struct stat sb; /* stat buf to copy modes */
48 char buf[GRPBUFSIZ];
49
50 if ((etcgrp = fopen(GROUP, "r")) == NULL) {
51 return (EX_UPDATE);
52 }
53
54 if (fstat(fileno(etcgrp), &sb) < 0) {
55 /* If we can't get mode, take a default */
56 sb.st_mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH;
57 }
58
59 o_mask = umask(077);
60 etctmp = fopen(GRPTMP, "w+");
61 (void) umask(o_mask);
62
63 if (etctmp == NULL) {
64 fclose(etcgrp);
65 return (EX_UPDATE);
66 }
67
68 if (fchmod(fileno(etctmp), sb.st_mode) != 0 ||
69 fchown(fileno(etctmp), sb.st_uid, sb.st_gid) != 0 ||
70 lockf(fileno(etctmp), F_LOCK, 0) != 0) {
71 fclose(etcgrp);
72 fclose(etctmp);
73 unlink(GRPTMP);
74 return (EX_UPDATE);
75 }
76
77 while (fgets(buf, GRPBUFSIZ, etcgrp) != NULL) {
78 /* Check for NameService reference */
79 if (!newdone && (buf[0] == '+' || buf[0] == '-')) {
80 (void) fprintf(etctmp, "%s::%u:\n", group, gid);
81 newdone = 1;
82 }
83
84 fputs(buf, etctmp);
85 }
86
87
88 (void) fclose(etcgrp);
89
90 if (!newdone) {
91 (void) fprintf(etctmp, "%s::%u:\n", group, gid);
92 }
93
94 if (rename(GRPTMP, GROUP) < 0) {
95 fclose(etctmp);
96 unlink(GRPTMP);
97 return (EX_UPDATE);
98 }
99
100 (void) fclose(etctmp);
101
102
103 return (EX_SUCCESS);
104 }
105