1 /* groups -- print the groups a user is in
2 Copyright (C) 1989-2008 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. */
23 #include <sys/types.h>
30 #include "group-list.h"
32 /* The official name of this program (e.g., no `g' prefix). */
33 #define PROGRAM_NAME "groups"
36 proper_name ("David MacKenzie"), \
37 proper_name ("James Youngman")
40 static struct option const longopts[] =
42 {GETOPT_HELP_OPTION_DECL},
43 {GETOPT_VERSION_OPTION_DECL},
50 if (status != EXIT_SUCCESS)
51 fprintf (stderr, _("Try `%s --help' for more information.\n"),
55 printf (_("Usage: %s [OPTION]... [USERNAME]...\n"), program_name);
57 Print group memberships for each USERNAME or, if no USERNAME is specified, for\n\
58 the current process (which may differ if the groups database has changed).\n"),
60 fputs (HELP_OPTION_DESCRIPTION, stdout);
61 fputs (VERSION_OPTION_DESCRIPTION, stdout);
62 emit_bug_reporting_address ();
68 main (int argc, char **argv)
75 initialize_main (&argc, &argv);
76 set_program_name (argv[0]);
77 setlocale (LC_ALL, "");
78 bindtextdomain (PACKAGE, LOCALEDIR);
81 atexit (close_stdout);
83 /* Processing the arguments this way makes groups.c behave differently to
84 * groups.sh if one of the arguments is "--".
86 while ((optc = getopt_long (argc, argv, "", longopts, NULL)) != -1)
90 case_GETOPT_HELP_CHAR;
91 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
99 /* No arguments. Divulge the details of the current process. */
104 if (!print_group_list (NULL, ruid, rgid, egid, true))
110 /* At least one argument. Divulge the details of the specified users. */
111 while (optind < argc)
113 struct passwd *pwd = getpwnam (argv[optind]);
115 error (EXIT_FAILURE, 0, _("%s: No such user"), argv[optind]);
117 rgid = egid = pwd->pw_gid;
119 printf ("%s : ", argv[optind]);
120 if (!print_group_list (argv[optind++], ruid, rgid, egid, true))
126 exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);
131 * indent-tabs-mode: nil