Apply a patch from Brent Priddy <brent.priddy@adtran.com> to add
[oweals/busybox.git] / coreutils / id.c
1 /* vi: set sw=4 ts=4: */
2 /*
3  * Mini id implementation for busybox
4  *
5  * Copyright (C) 2000 by Randolph Chung <tausq@debian.org>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  *
21  */
22
23 #include "busybox.h"
24 #include <stdio.h>
25 #include <unistd.h>
26 #include <pwd.h>
27 #include <grp.h>
28 #include <getopt.h>
29 #include <sys/types.h>
30
31 extern int id_main(int argc, char **argv)
32 {
33         int no_user = 0, no_group = 0, print_real = 0;
34         int name_not_number = 0;
35         char user[9], group[9];
36         long gid;
37         long pwnam, grnam;
38         int opt;
39         
40         gid = 0;
41
42         while ((opt = getopt(argc, argv, "ugrn")) > 0) {
43                 switch (opt) {
44                         case 'u':
45                                 no_group++;
46                                 break;
47                         case 'g':
48                                 no_user++;
49                                 break;
50                         case 'r':
51                                 print_real++;
52                                 break;
53                         case 'n':
54                                 name_not_number++;
55                                 break;
56                         default:
57                                 usage(id_usage);
58                 }
59         }
60
61         if (no_user && no_group) usage(id_usage);
62
63         if (argv[optind] == NULL) {
64                 if (print_real) {
65                         my_getpwuid(user, getuid());
66                         my_getgrgid(group, getgid());
67                 } else {
68                         my_getpwuid(user, geteuid());
69                         my_getgrgid(group, getegid());
70                 }
71         } else {
72                 strncpy(user, argv[optind], 8);
73                 user[8] = '\0';
74             gid = my_getpwnamegid(user);
75                 my_getgrgid(group, gid);
76         }
77
78         pwnam=my_getpwnam(user);
79         grnam=my_getgrnam(group);
80         if (gid == -1 || pwnam==-1 || grnam==-1) {
81                 error_msg_and_die("%s: No such user\n", user);
82         }
83
84         if (no_group) {
85                 if(name_not_number && user)
86                         printf("%s\n",user);
87                 else
88                         printf("%ld\n", pwnam);
89         } else if (no_user) {
90                 if(name_not_number && group)
91                         printf("%s\n", group);
92                 else
93                         printf("%ld\n", grnam);
94         } else {
95                 printf("uid=%ld(%s) gid=%ld(%s)\n", pwnam, user, grnam, group);
96         }
97         return(0);
98 }
99
100
101 /* END CODE */