1 /*
2 * Copyright (c) 1980 Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #ifndef lint
35 char copyright[] =
36 "@(#) Copyright (c) 1980 Regents of the University of California.\n\
37 All rights reserved.\n";
38 #endif /* not lint */
39
40 #ifndef lint
41 static char sccsid[] = "@(#)groups.c 5.4 (Berkeley) 6/1/90";
42 #endif /* not lint */
43
44 /*
45 * groups
46 */
47
48 #include <sys/param.h>
49 #include <grp.h>
50 #include <pwd.h>
51 #include <stdio.h>
52
main(argc,argv)53 main(argc, argv)
54 int argc;
55 char *argv[];
56 {
57 int ngroups, i;
58 char *sep = "";
59 struct group *gr;
60 int *groups;
61
62 if (argc > 1)
63 showgroups(argv[1]);
64
65 ngroups = getgroups(0, 0);
66 groups = (int *) malloc(ngroups * sizeof(int));
67 ngroups = getgroups(ngroups, groups);
68 for (i = 1; i < ngroups; i++) {
69 gr = getgrgid(groups[i]);
70 if (gr == NULL)
71 printf("%s%d", sep, groups[i]);
72 else
73 printf("%s%s", sep, gr->gr_name);
74 sep = " ";
75 }
76 printf("\n");
77 exit(0);
78 }
79
showgroups(user)80 showgroups(user)
81 register char *user;
82 {
83 register struct group *gr;
84 register struct passwd *pw;
85 register char **cp;
86 char *sep = "";
87
88 if ((pw = getpwnam(user)) == NULL) {
89 fprintf(stderr, "groups: no such user.\n");
90 exit(1);
91 }
92 while (gr = getgrent()) {
93 if (pw->pw_gid == gr->gr_gid) {
94 printf("%s%s", sep, gr->gr_name);
95 sep = " ";
96 continue;
97 }
98 for (cp = gr->gr_mem; cp && *cp; cp++)
99 if (strcmp(*cp, user) == 0) {
100 printf("%s%s", sep, gr->gr_name);
101 sep = " ";
102 break;
103 }
104 }
105 printf("\n");
106 exit(0);
107 }
108