d50de4775151087f263c753f5a7e7e7b7e62f396
[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 <sys/types.h>
28
29 extern int id_main(int argc, char **argv)
30 {
31         int no_user = 0, no_group = 0, print_real = 0;
32         int name_not_number = 0;
33         char user[9], group[9];
34         long gid;
35         long pwnam, grnam;
36         int opt;
37         
38         gid = 0;
39
40         while ((opt = getopt(argc, argv, "ugrn")) > 0) {
41                 switch (opt) {
42                         case 'u':
43                                 no_group++;
44                                 break;
45                         case 'g':
46                                 no_user++;
47                                 break;
48                         case 'r':
49                                 print_real++;
50                                 break;
51                         case 'n':
52                                 name_not_number++;
53                                 break;
54                         default:
55                                 usage(id_usage);
56                 }
57         }
58
59         if (no_user && no_group) usage(id_usage);
60
61         if (argv[optind] == NULL) {
62                 if (print_real) {
63                         my_getpwuid(user, getuid());
64                         my_getgrgid(group, getgid());
65                 } else {
66                         my_getpwuid(user, geteuid());
67                         my_getgrgid(group, getegid());
68                 }
69         } else {
70                 strncpy(user, argv[optind], 8);
71                 user[8] = '\0';
72             gid = my_getpwnamegid(user);
73                 my_getgrgid(group, gid);
74         }
75
76         pwnam=my_getpwnam(user);
77         grnam=my_getgrnam(group);
78         if (gid == -1 || pwnam==-1 || grnam==-1) {
79                 error_msg_and_die("%s: No such user\n", user);
80         }
81
82         if (no_group) {
83                 if(name_not_number && user)
84                         printf("%s\n",user);
85                 else
86                         printf("%ld\n", pwnam);
87         } else if (no_user) {
88                 if(name_not_number && group)
89                         printf("%s\n", group);
90                 else
91                         printf("%ld\n", grnam);
92         } else {
93                 printf("uid=%ld(%s) gid=%ld(%s)\n", pwnam, user, grnam, group);
94         }
95         return(0);
96 }
97
98
99 /* END CODE */