e91ac758570e7b3e4ef9ef042611507bb65d068e
[oweals/busybox.git] / 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 <getopt.h>
27 #include <string.h>
28 #include <sys/types.h>
29
30 extern int id_main(int argc, char **argv)
31 {
32         int no_user = 0, no_group = 0, print_real = 0;
33         int name_not_number = 0;
34         char user[9], group[9];
35         long gid;
36         long pwnam, grnam;
37         int opt;
38         
39         gid = 0;
40
41         while ((opt = getopt(argc, argv, "ugrn")) > 0) {
42                 switch (opt) {
43                         case 'u':
44                                 no_group++;
45                                 break;
46                         case 'g':
47                                 no_user++;
48                                 break;
49                         case 'r':
50                                 print_real++;
51                                 break;
52                         case 'n':
53                                 name_not_number++;
54                                 break;
55                         default:
56                                 usage(id_usage);
57                 }
58         }
59
60         if (no_user && no_group) usage(id_usage);
61
62         if (argv[optind] == NULL) {
63                 if (print_real) {
64                         my_getpwuid(user, getuid());
65                         my_getgrgid(group, getgid());
66                 } else {
67                         my_getpwuid(user, geteuid());
68                         my_getgrgid(group, getegid());
69                 }
70         } else {
71                 strncpy(user, argv[optind], 8);
72                 user[8] = '\0';
73             gid = my_getpwnamegid(user);
74                 my_getgrgid(group, gid);
75         }
76
77         pwnam=my_getpwnam(user);
78         grnam=my_getgrnam(group);
79         if (gid == -1 || pwnam==-1 || grnam==-1) {
80                 error_msg_and_die("%s: No such user\n", user);
81         }
82
83         if (no_group) {
84                 if(name_not_number && user)
85                         printf("%s\n",user);
86                 else
87                         printf("%ld\n", pwnam);
88         } else if (no_user) {
89                 if(name_not_number && group)
90                         printf("%s\n", group);
91                 else
92                         printf("%ld\n", grnam);
93         } else {
94                 printf("uid=%ld(%s) gid=%ld(%s)\n", pwnam, user, grnam, group);
95         }
96         return(0);
97 }
98
99
100 /* END CODE */