| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini id implementation for busybox |
| * |
| * |
| * Copyright (C) 2000 by Randolph Chung <tausq@debian.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include "internal.h" |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <pwd.h> |
| #include <grp.h> |
| #include <sys/types.h> |
| |
| static const char id_usage[] = |
| "id [OPTIONS]... [USERNAME]\n" |
| #ifndef BB_FEATURE_TRIVIAL_HELP |
| "\nPrint information for USERNAME or the current user\n\n" |
| "Options:\n" |
| "\t-g\tprints only the group ID\n" |
| "\t-u\tprints only the user ID\n" |
| "\t-r\tprints the real user ID instead of the effective ID (with -ug)\n\n" |
| #endif |
| ; |
| |
| extern int id_main(int argc, char **argv) |
| { |
| int no_user = 0, no_group = 0, print_real = 0; |
| char *cp, *user, *group; |
| unsigned long gid; |
| |
| cp = user = group = NULL; |
| |
| argc--; argv++; |
| |
| while (argc > 0) { |
| cp = *argv; |
| if (*cp == '-') { |
| switch (*++cp) { |
| case 'u': no_group = 1; break; |
| case 'g': no_user = 1; break; |
| case 'r': print_real = 1; break; |
| default: usage(id_usage); |
| } |
| } else { |
| user = cp; |
| } |
| argc--; argv++; |
| } |
| |
| if (no_user && no_group) usage(id_usage); |
| |
| if (user == NULL) { |
| user = xmalloc(9); |
| group = xmalloc(9); |
| if (print_real) { |
| my_getpwuid(user, getuid()); |
| my_getgrgid(group, getgid()); |
| } else { |
| my_getpwuid(user, geteuid()); |
| my_getgrgid(group, getegid()); |
| } |
| } else { |
| group = xmalloc(9); |
| gid = my_getpwnamegid(user); |
| my_getgrgid(group, gid); |
| } |
| |
| if (no_group) printf("%lu\n", my_getpwnam(user)); |
| else if (no_user) printf("%lu\n", my_getgrnam(group)); |
| else |
| printf("uid=%lu(%s) gid=%lu(%s)\n", |
| my_getpwnam(user), user, my_getgrnam(group), group); |
| |
| |
| exit(0); |
| } |
| |
| |
| /* END CODE */ |