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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/* chown -- change user and group ownership of files
Copyright (C) 89, 90, 91, 1995-2001 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 2, 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. */
/*
| user
| unchanged explicit
-------------|-------------------------+-------------------------|
g unchanged | --- | chown u |
r |-------------------------+-------------------------|
o explicit | chgrp g or chown .g | chown u.g |
u |-------------------------+-------------------------|
p from passwd| --- | chown u. |
|-------------------------+-------------------------|
Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
#include <config.h>
#include <stdio.h>
#include <sys/types.h>
#include <getopt.h>
#include "system.h"
#include "error.h"
#include "lchown.h"
#include "quote.h"
#include "savedir.h"
#include "chown-core.h"
/* The official name of this program (e.g., no `g' prefix). */
#define PROGRAM_NAME "chown"
#define AUTHORS "David MacKenzie"
#ifndef _POSIX_VERSION
struct passwd *getpwnam ();
struct group *getgrnam ();
struct group *getgrgid ();
#endif
#if ! HAVE_ENDPWENT
# define endpwent() ((void) 0)
#endif
char *parse_user_spec ();
void strip_trailing_slashes ();
/* The name the program was run with. */
char *program_name;
/* The argument to the --reference option. Use the owner and group IDs
of this file. This file must exist. */
static char *reference_file;
/* For long options that have no equivalent short option, use a
non-character as a pseudo short option, starting with CHAR_MAX + 1. */
enum
{
REFERENCE_FILE_OPTION = CHAR_MAX + 1,
DEREFERENCE_OPTION,
FROM_OPTION
};
static struct option const long_options[] =
{
{"recursive", no_argument, 0, 'R'},
{"changes", no_argument, 0, 'c'},
{"dereference", no_argument, 0, DEREFERENCE_OPTION},
{"from", required_argument, 0, FROM_OPTION},
{"no-dereference", no_argument, 0, 'h'},
{"quiet", no_argument, 0, 'f'},
{"silent", no_argument, 0, 'f'},
{"reference", required_argument, 0, REFERENCE_FILE_OPTION},
{"verbose", no_argument, 0, 'v'},
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{0, 0, 0, 0}
};
void
usage (int status)
{
if (status != 0)
fprintf (stderr, _("Try `%s --help' for more information.\n"),
program_name);
else
{
printf (_("\
Usage: %s [OPTION]... OWNER[:[GROUP]] FILE...\n\
or: %s [OPTION]... :GROUP FILE...\n\
or: %s [OPTION]... --reference=RFILE FILE...\n\
"),
program_name, program_name, program_name);
printf (_("\
Change the owner and/or group of each FILE to OWNER and/or GROUP.\n\
\n\
-c, --changes like verbose but report only when a change is made\n\
--dereference affect the referent of each symbolic link, rather\n\
than the symbolic link itself\n\
-h, --no-dereference affect symbolic links instead of any referenced file\n\
(available only on systems that can change the\n\
ownership of a symlink)\n\
--from=CURRENT_OWNER:CURRENT_GROUP\n\
change the owner and/or group of each file only if\n\
its current owner and/or group match those specified\n\
here. Either may be omitted, in which case a match\n\
is not required for the omitted attribute.\n\
-f, --silent, --quiet suppress most error messages\n\
--reference=RFILE use RFILE's owner and group rather than\n\
the specified OWNER:GROUP values\n\
-R, --recursive operate on files and directories recursively\n\
-v, --verbose output a diagnostic for every file processed\n\
--help display this help and exit\n\
--version output version information and exit\n\
\n\
"));
printf (_("\
Owner is unchanged if missing. Group is unchanged if missing, but changed\n\
to login group if implied by a `:'. OWNER and GROUP may be numeric as well\n\
as symbolic.\n\
"));
puts (_("\nReport bugs to <bug-fileutils@gnu.org>."));
}
exit (status);
}
int
main (int argc, char **argv)
{
uid_t uid = (uid_t) -1; /* New uid; -1 if not to be changed. */
gid_t gid = (uid_t) -1; /* New gid; -1 if not to be changed. */
uid_t old_uid = (uid_t) -1; /* Old uid; -1 if unrestricted. */
gid_t old_gid = (uid_t) -1; /* Old gid; -1 if unrestricted. */
struct Chown_option chopt;
int errors = 0;
int optc;
program_name = argv[0];
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
atexit (close_stdout);
chopt_init (&chopt);
while ((optc = getopt_long (argc, argv, "Rcfhv", long_options, NULL)) != -1)
{
switch (optc)
{
case 0:
break;
case REFERENCE_FILE_OPTION:
reference_file = optarg;
break;
case DEREFERENCE_OPTION:
chopt.dereference = DEREF_ALWAYS;
break;
case FROM_OPTION:
{
char *u_dummy, *g_dummy;
const char *e = parse_user_spec (argv[optind],
&old_uid, &old_gid,
&u_dummy, &g_dummy);
if (e)
error (1, 0, "%s: %s", quote (argv[optind]), e);
break;
}
case 'R':
chopt.recurse = 1;
break;
case 'c':
chopt.verbosity = V_changes_only;
break;
case 'f':
chopt.force_silent = 1;
break;
case 'h':
chopt.dereference = DEREF_NEVER;
break;
case 'v':
chopt.verbosity = V_high;
break;
case_GETOPT_HELP_CHAR;
case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
default:
usage (1);
}
}
if (argc - optind + (reference_file ? 1 : 0) <= 1)
{
error (0, 0, _("too few arguments"));
usage (1);
}
if (reference_file)
{
struct stat ref_stats;
if (stat (reference_file, &ref_stats))
error (1, errno, _("getting attributes of %s"), quote (reference_file));
uid = ref_stats.st_uid;
gid = ref_stats.st_gid;
chopt.user_name = uid_to_name (ref_stats.st_uid);
chopt.group_name = gid_to_name (ref_stats.st_gid);
}
else
{
const char *e = parse_user_spec (argv[optind], &uid, &gid,
&chopt.user_name, &chopt.group_name);
if (e)
error (1, 0, "%s: %s", quote (argv[optind]), e);
/* FIXME: set it to the empty string? */
if (chopt.user_name == NULL)
chopt.user_name = "";
optind++;
}
for (; optind < argc; ++optind)
{
strip_trailing_slashes (argv[optind]);
errors |= change_file_owner (1, argv[optind], uid, gid,
old_uid, old_gid, &chopt);
}
chopt_free (&chopt);
exit (errors);
}
|
