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
|
/* groups -- print the groups a user is in
Copyright (C) 1989-2012 Free Software Foundation, Inc.
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 3 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, see <http://www.gnu.org/licenses/>. */
/* Written by James Youngman based on id.c and groups.sh,
which were written by Arnold Robbins and David MacKenzie. */
#include <config.h>
#include <stdio.h>
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
#include <getopt.h>
#include "system.h"
#include "error.h"
#include "group-list.h"
/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "groups"
#define AUTHORS \
proper_name ("David MacKenzie"), \
proper_name ("James Youngman")
static struct option const longopts[] =
{
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{NULL, 0, NULL, 0}
};
void
usage (int status)
{
if (status != EXIT_SUCCESS)
emit_try_help ();
else
{
printf (_("Usage: %s [OPTION]... [USERNAME]...\n"), program_name);
fputs (_("\
Print group memberships for each USERNAME or, if no USERNAME is specified, for\
\n\
the current process (which may differ if the groups database has changed).\n"),
stdout);
fputs (HELP_OPTION_DESCRIPTION, stdout);
fputs (VERSION_OPTION_DESCRIPTION, stdout);
emit_ancillary_info ();
}
exit (status);
}
int
main (int argc, char **argv)
{
int optc;
bool ok = true;
gid_t rgid, egid;
uid_t ruid;
initialize_main (&argc, &argv);
set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
atexit (close_stdout);
/* Processing the arguments this way makes groups.c behave differently to
* groups.sh if one of the arguments is "--".
*/
while ((optc = getopt_long (argc, argv, "", longopts, NULL)) != -1)
{
switch (optc)
{
case_GETOPT_HELP_CHAR;
case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
default:
usage (EXIT_FAILURE);
}
}
if (optind == argc)
{
/* No arguments. Divulge the details of the current process. */
uid_t NO_UID = -1;
gid_t NO_GID = -1;
errno = 0;
ruid = getuid ();
if (ruid == NO_UID && errno)
error (EXIT_FAILURE, errno, _("cannot get real UID"));
errno = 0;
egid = getegid ();
if (egid == NO_GID && errno)
error (EXIT_FAILURE, errno, _("cannot get effective GID"));
errno = 0;
rgid = getgid ();
if (rgid == NO_GID && errno)
error (EXIT_FAILURE, errno, _("cannot get real GID"));
if (!print_group_list (NULL, ruid, rgid, egid, true))
ok = false;
putchar ('\n');
}
else
{
/* At least one argument. Divulge the details of the specified users. */
while (optind < argc)
{
struct passwd *pwd = getpwnam (argv[optind]);
if (pwd == NULL)
error (EXIT_FAILURE, 0, _("%s: no such user"), argv[optind]);
ruid = pwd->pw_uid;
rgid = egid = pwd->pw_gid;
printf ("%s : ", argv[optind]);
if (!print_group_list (argv[optind++], ruid, rgid, egid, true))
ok = false;
putchar ('\n');
}
}
exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);
}
|
