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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/* 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
*
*/
/* BB_AUDIT SUSv3 _NOT_ compliant -- option -G is not currently supported. */
/* Hacked by Tito Ragusa (C) 2004 to handle usernames of whatever length and to
* be more similar to GNU id.
*/
#include "busybox.h"
#include "pwd_.h"
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#ifdef CONFIG_SELINUX
#include <selinux/selinux.h> /* for is_selinux_enabled() */
#endif
#define PRINT_REAL 1
#define NAME_NOT_NUMBER 2
#define JUST_USER 4
#define JUST_GROUP 8
static short printf_full(unsigned int id, const char *arg, const char prefix)
{
const char *fmt = "%cid=%u";
short status=EXIT_FAILURE;
if(arg) {
fmt = "%cid=%u(%s)";
status=EXIT_SUCCESS;
}
bb_printf(fmt, prefix, id, arg);
return status;
}
extern int id_main(int argc, char **argv)
{
struct passwd *p;
uid_t uid;
gid_t gid;
unsigned long flags;
short status;
bb_opt_complementaly = "u~g:g~u";
flags = bb_getopt_ulflags(argc, argv, "rnug");
if ((flags & BB_GETOPT_ERROR)
/* Don't allow -n -r -nr */
|| (flags <= 3 && flags > 0)
/* Don't allow more than one username */
|| (argc > optind + 1))
bb_show_usage();
/* This values could be overwritten later */
uid = geteuid();
gid = getegid();
if (flags & PRINT_REAL) {
uid = getuid();
gid = getgid();
}
if(argv[optind]) {
p=getpwnam(argv[optind]);
/* my_getpwnam is needed because it exits on failure */
uid = my_getpwnam(argv[optind]);
gid = p->pw_gid;
/* in this case PRINT_REAL is the same */
}
if(flags & (JUST_GROUP | JUST_USER)) {
/* JUST_GROUP and JUST_USER are mutually exclusive */
if(flags & NAME_NOT_NUMBER) {
/* my_getpwuid and my_getgrgid exit on failure so puts cannot segfault */
puts((flags & JUST_USER) ? my_getpwuid(NULL, uid, -1 ) : my_getgrgid(NULL, gid, -1 ));
} else {
bb_printf("%u\n",(flags & JUST_USER) ? uid : gid);
}
/* exit */
bb_fflush_stdout_and_exit(EXIT_SUCCESS);
}
/* Print full info like GNU id */
/* my_getpwuid doesn't exit on failure here */
status=printf_full(uid, my_getpwuid(NULL, uid, 0), 'u');
putchar(' ');
/* my_getgrgid doesn't exit on failure here */
status|=printf_full(gid, my_getgrgid(NULL, gid, 0), 'g');
#ifdef CONFIG_SELINUX
if ( is_selinux_enabled() ) {
security_context_t mysid;
char context[80];
int len = sizeof(context);
getcon(&mysid);
context[0] = '\0';
if (mysid) {
len = strlen(mysid)+1;
safe_strncpy(context, mysid, len);
freecon(mysid);
}else{
safe_strncpy(context, "unknown",8);
}
bb_printf(" context=%s", context);
}
#endif
putchar('\n');
bb_fflush_stdout_and_exit(status);
}
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/
|
