1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* 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"
"\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;
gid_t 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("%u\n", my_getpwnam(user));
else if (no_user) printf("%u\n", my_getgrnam(group));
else
printf("uid=%u(%s) gid=%u(%s)\n",
my_getpwnam(user), user, my_getgrnam(group), group);
exit(0);
}
/* END CODE */
|
