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 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 #pragma ident "%Z%%M% %I% %E% SMI"
41
42 /*
43 * groups - show group memberships
44 */
45 /* LINTLIBRARY PROTOLIB1 */
46
47 #include <grp.h>
48 #include <pwd.h>
49 #include <stdio.h>
50 #include <unistd.h>
51 #include <stdlib.h>
52
53 extern struct group *getgrgid();
54 extern struct passwd *getpwnam();
55 extern int _getgroupsbymember(const char *, gid_t[], int, int);
56
57 static void showgroups();
58
59 static int ngroups_max;
60
61 int
main(int argc,char * argv[])62 main(int argc, char *argv[])
63 {
64 int xval = 0;
65 struct passwd *pw;
66
67 ngroups_max = sysconf(_SC_NGROUPS_MAX);
68
69 if (ngroups_max < 0) {
70 (void) fprintf(stderr,
71 "groups: could not get configuration info\n");
72 exit(1);
73 }
74
75 if (ngroups_max == 0)
76 exit(0);
77
78 if (argc == 1) {
79
80 if ((pw = getpwuid(getuid())) == NULL) {
81 (void) fprintf(stderr, "groups: No passwd entry\n");
82 xval = 1;
83 } else
84 showgroups(pw);
85
86 } else while (*++argv) {
87
88 if ((pw = getpwnam(*argv)) == NULL) {
89 (void) fprintf(stderr,
90 "groups: %s : No such user\n", *argv);
91 xval = 1;
92 } else {
93 if (argc > 2)
94 (void) printf("%s : ", *argv);
95 showgroups(pw);
96 }
97 }
98
99 return (xval);
100
101 }
102
103 static void
showgroups(struct passwd * pw)104 showgroups(struct passwd *pw)
105 {
106 struct group *gr;
107 static gid_t *groups = NULL;
108 int ngroups;
109 int i;
110
111 if (groups == NULL) {
112 if ((groups = (gid_t *)calloc((uint_t)ngroups_max,
113 sizeof (gid_t))) == 0) {
114 (void) fprintf(stderr,
115 "allocation of %d bytes failed\n",
116 ngroups_max * sizeof (gid_t));
117 exit(1);
118 }
119 }
120 groups[0] = pw->pw_gid;
121
122 ngroups = _getgroupsbymember(pw->pw_name, groups, ngroups_max, 1);
123
124 if (gr = getgrgid(groups[0]))
125 (void) printf("%s", gr->gr_name);
126 else
127 (void) printf("%d", (int)pw->pw_gid);
128
129 for (i = 1; i < ngroups; i++) {
130 if ((gr = getgrgid(groups[i])))
131 (void) printf(" %s", gr->gr_name);
132 else
133 (void) printf(" %d", (int)groups[i]);
134 }
135
136 (void) printf("\n");
137 }
138