1 /* groups -- print the groups a user is in
2 Copyright (C) 1989-2010 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by James Youngman based on id.c and groups.sh,
18 which were written by Arnold Robbins and David MacKenzie. */
22 #include <sys/types.h>
29 #include "group-list.h"
31 /* The official name of this program (e.g., no `g' prefix). */
32 #define PROGRAM_NAME "groups"
35 proper_name ("David MacKenzie"), \
36 proper_name ("James Youngman")
39 static struct option const longopts[] =
41 {GETOPT_HELP_OPTION_DECL},
42 {GETOPT_VERSION_OPTION_DECL},
49 if (status != EXIT_SUCCESS)
50 fprintf (stderr, _("Try `%s --help' for more information.\n"),
54 printf (_("Usage: %s [OPTION]... [USERNAME]...\n"), program_name);
56 Print group memberships for each USERNAME or, if no USERNAME is specified, for\n\
57 the current process (which may differ if the groups database has changed).\n"),
59 fputs (HELP_OPTION_DESCRIPTION, stdout);
60 fputs (VERSION_OPTION_DESCRIPTION, stdout);
61 emit_ancillary_info ();
67 main (int argc, char **argv)
74 initialize_main (&argc, &argv);
75 set_program_name (argv[0]);
76 setlocale (LC_ALL, "");
77 bindtextdomain (PACKAGE, LOCALEDIR);
80 atexit (close_stdout);
82 /* Processing the arguments this way makes groups.c behave differently to
83 * groups.sh if one of the arguments is "--".
85 while ((optc = getopt_long (argc, argv, "", longopts, NULL)) != -1)
89 case_GETOPT_HELP_CHAR;
90 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
98 /* No arguments. Divulge the details of the current process. */
103 if (!print_group_list (NULL, ruid, rgid, egid, true))
109 /* At least one argument. Divulge the details of the specified users. */
110 while (optind < argc)
112 struct passwd *pwd = getpwnam (argv[optind]);
114 error (EXIT_FAILURE, 0, _("%s: No such user"), argv[optind]);
116 rgid = egid = pwd->pw_gid;
118 printf ("%s : ", argv[optind]);
119 if (!print_group_list (argv[optind++], ruid, rgid, egid, true))
125 exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);