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 /*
41 * groups - show group memberships
42 */
43 /* LINTLIBRARY PROTOLIB1 */
44
45 #include <grp.h>
46 #include <pwd.h>
47 #include <stdio.h>
48 #include <unistd.h>
49 #include <stdlib.h>
50
51 extern struct group *getgrgid();
52 extern struct passwd *getpwnam();
53 extern int _getgroupsbymember(const char *, gid_t[], int, int);
54
55 static void showgroups();
56
57 static int ngroups_max;
58
59 int
main(int argc,char * argv[])60 main(int argc, char *argv[])
61 {
62 int xval = 0;
63 struct passwd *pw;
64
65 ngroups_max = sysconf(_SC_NGROUPS_MAX);
66
67 if (ngroups_max < 0) {
68 (void) fprintf(stderr,
69 "groups: could not get configuration info\n");
70 exit(1);
71 }
72
73 if (ngroups_max == 0)
74 exit(0);
75
76 if (argc == 1) {
77
78 if ((pw = getpwuid(getuid())) == NULL) {
79 (void) fprintf(stderr, "groups: No passwd entry\n");
80 xval = 1;
81 } else
82 showgroups(pw);
83
84 } else while (*++argv) {
85
86 if ((pw = getpwnam(*argv)) == NULL) {
87 (void) fprintf(stderr,
88 "groups: %s : No such user\n", *argv);
89 xval = 1;
90 } else {
91 if (argc > 2)
92 (void) printf("%s : ", *argv);
93 showgroups(pw);
94 }
95 }
96
97 return (xval);
98
99 }
100
101 static void
showgroups(struct passwd * pw)102 showgroups(struct passwd *pw)
103 {
104 struct group *gr;
105 static gid_t *groups = NULL;
106 int ngroups;
107 int i;
108
109 if (groups == NULL) {
110 if ((groups = (gid_t *)calloc((uint_t)ngroups_max,
111 sizeof (gid_t))) == 0) {
112 (void) fprintf(stderr,
113 "allocation of %d bytes failed\n",
114 ngroups_max * sizeof (gid_t));
115 exit(1);
116 }
117 }
118 groups[0] = pw->pw_gid;
119
120 ngroups = _getgroupsbymember(pw->pw_name, groups, ngroups_max, 1);
121
122 if (gr = getgrgid(groups[0]))
123 (void) printf("%s", gr->gr_name);
124 else
125 (void) printf("%d", (int)pw->pw_gid);
126
127 for (i = 1; i < ngroups; i++) {
128 if ((gr = getgrgid(groups[i])))
129 (void) printf(" %s", gr->gr_name);
130 else
131 (void) printf(" %d", (int)groups[i]);
132 }
133
134 (void) printf("\n");
135 }
136