1 /* vi: set sw=4 ts=4: */
3 * Mini id implementation for busybox
6 * Copyright (C) 2000 by Randolph Chung <tausq@debian.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include <sys/types.h>
31 static const char id_usage[] =
32 "id [OPTIONS]... [USERNAME]\n"
33 #ifndef BB_FEATURE_TRIVIAL_HELP
34 "\nPrint information for USERNAME or the current user\n\n"
36 "\t-g\tprints only the group ID\n"
37 "\t-u\tprints only the user ID\n"
38 "\t-r\tprints the real user ID instead of the effective ID (with -ug)\n\n"
42 extern int id_main(int argc, char **argv)
44 int no_user = 0, no_group = 0, print_real = 0;
45 char *cp, *user, *group;
48 cp = user = group = NULL;
56 case 'u': no_group = 1; break;
57 case 'g': no_user = 1; break;
58 case 'r': print_real = 1; break;
59 default: usage(id_usage);
67 if (no_user && no_group) usage(id_usage);
73 my_getpwuid(user, getuid());
74 my_getgrgid(group, getgid());
76 my_getpwuid(user, geteuid());
77 my_getgrgid(group, getegid());
81 gid = my_getpwnamegid(user);
82 my_getgrgid(group, gid);
85 if (no_group) printf("%u\n", my_getpwnam(user));
86 else if (no_user) printf("%u\n", my_getgrnam(group));
88 printf("uid=%u(%s) gid=%u(%s)\n",
89 my_getpwnam(user), user, my_getgrnam(group), group);