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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/* id.c - print real and effective user and group IDs
*
* Copyright 2012 Sony Network Entertainment, Inc.
*
* by Tim Bird <tim.bird@am.sony.com>
*
* See http://opengroup.org/onlinepubs/9699919799/utilities/id.html
USE_ID(NEWTOY(id, ">1"USE_ID_Z("Z")"nGgru[!"USE_ID_Z("Z")"Ggu]", TOYFLAG_USR|TOYFLAG_BIN))
USE_GROUPS(NEWTOY(groups, NULL, TOYFLAG_USR|TOYFLAG_BIN))
USE_LOGNAME(NEWTOY(logname, ">0", TOYFLAG_USR|TOYFLAG_BIN))
USE_WHOAMI(OLDTOY(whoami, logname, TOYFLAG_USR|TOYFLAG_BIN))
config ID
bool "id"
default y
help
usage: id [-nGgru] [USER...]
Print user and group ID.
-n Print names instead of numeric IDs (to be used with -Ggu)
-G Show only the group IDs
-g Show only the effective group ID
-r Show real ID instead of effective ID
-u Show only the effective user ID
config ID_Z
bool
default y
depends on ID && !TOYBOX_LSM_NONE
help
usage: id [-Z]
-Z Show only security context
config GROUPS
bool "groups"
default y
help
usage: groups [user]
Print the groups a user is in.
config LOGNAME
bool "logname"
default y
help
usage: logname
Print the current user name.
config WHOAMI
bool "whoami"
default y
help
usage: whoami
Print the current user name.
*/
#define FOR_id
#define FORCE_FLAGS
#include "toys.h"
GLOBALS(
int is_groups;
)
static void s_or_u(char *s, unsigned u, int done)
{
if (toys.optflags&FLAG_n) printf("%s", s);
else printf("%u", u);
if (done) {
xputc('\n');
xexit();
}
}
static void showid(char *header, unsigned u, char *s)
{
printf("%s%u(%s)", header, u, s);
}
static void do_id(char *username)
{
int flags, i, ngroups;
struct passwd *pw;
struct group *grp;
uid_t uid = getuid(), euid = geteuid();
gid_t gid = getgid(), egid = getegid(), *groups;
flags = toys.optflags;
// check if a username is given
if (username) {
pw = xgetpwnam(username);
uid = euid = pw->pw_uid;
gid = egid = pw->pw_gid;
if (TT.is_groups) printf("%s : ", pw->pw_name);
}
i = flags & FLAG_r;
pw = xgetpwuid(i ? uid : euid);
if (toys.optflags&FLAG_u) s_or_u(pw->pw_name, pw->pw_uid, 1);
grp = xgetgrgid(i ? gid : egid);
if (flags & FLAG_g) s_or_u(grp->gr_name, grp->gr_gid, 1);
if (!(toys.optflags&(FLAG_G|FLAG_g|FLAG_Z))) {
showid("uid=", pw->pw_uid, pw->pw_name);
showid(" gid=", grp->gr_gid, grp->gr_name);
if (!i) {
if (uid != euid) {
pw = xgetpwuid(euid);
showid(" euid=", pw->pw_uid, pw->pw_name);
}
if (gid != egid) {
grp = xgetgrgid(egid);
showid(" egid=", grp->gr_gid, grp->gr_name);
}
}
showid(" groups=", grp->gr_gid, grp->gr_name);
}
if (!(toys.optflags&FLAG_Z)) {
groups = (gid_t *)toybuf;
i = sizeof(toybuf)/sizeof(gid_t);
ngroups = username ? getgrouplist(username, gid, groups, &i)
: getgroups(i, groups);
if (ngroups<0) perror_exit(0);
int show_separator = !(toys.optflags&FLAG_G);
for (i = 0; i<ngroups; i++) {
if (show_separator) xputc((toys.optflags&FLAG_G) ? ' ' : ',');
show_separator = 1;
if (!(grp = getgrgid(groups[i]))) perror_msg(0);
else if (toys.optflags&FLAG_G) s_or_u(grp->gr_name, grp->gr_gid, 0);
else if (grp->gr_gid != egid) showid("", grp->gr_gid, grp->gr_name);
else show_separator = 0; // Because we didn't show anything this time.
}
if (toys.optflags&FLAG_G) {
xputc('\n');
xexit();
}
}
if (!CFG_TOYBOX_LSM_NONE) {
if (lsm_enabled()) {
char *context = lsm_context();
printf(" context=%s"+!!(toys.optflags&FLAG_Z), context);
if (CFG_TOYBOX_FREE) free(context);
} else if (toys.optflags&FLAG_Z) error_exit("%s disabled", lsm_name());
}
xputc('\n');
}
void id_main(void)
{
if (toys.optc) while(*toys.optargs) do_id(*toys.optargs++);
else do_id(NULL);
}
void groups_main(void)
{
TT.is_groups = 1;
toys.optflags = FLAG_G|FLAG_n;
id_main();
}
void logname_main(void)
{
toys.optflags = FLAG_u|FLAG_n;
id_main();
}
|
