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
|
/* vi: set sw=4 ts=4: */
/*
* Mini chown implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
/* BB_AUDIT SUSv3 defects - unsupported options -H, -L, and -P. */
/* BB_AUDIT GNU defects - unsupported long options. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
#include "busybox.h"
static struct bb_uidgid_t ugid = { -1, -1 };
static int (*chown_func)(const char *, uid_t, gid_t) = chown;
#define OPT_STR ("Rh" USE_DESKTOP("vcfLHP"))
#define BIT_RECURSE 1
#define BIT_NODEREF 2
#define BIT_TRAVERSE 0x20
#define BIT_TRAVERSETOP (0x20|0x40)
#define OPT_RECURSE (option_mask32 & 1)
#define OPT_NODEREF (option_mask32 & 2)
#define OPT_VERBOSE (USE_DESKTOP(option_mask32 & 0x04) SKIP_DESKTOP(0))
#define OPT_CHANGED (USE_DESKTOP(option_mask32 & 0x08) SKIP_DESKTOP(0))
#define OPT_QUIET (USE_DESKTOP(option_mask32 & 0x10) SKIP_DESKTOP(0))
/* POSIX options
* -L traverse every symbolic link to a directory encountered
* -H if a command line argument is a symbolic link to a directory, traverse it
* -P do not traverse any symbolic links (default)
* We do not conform to the following:
* "Specifying more than one of -H, -L, and -P is not an error.
* The last option specified shall determine the behavior of the utility." */
/* -L */
#define OPT_TRAVERSE (USE_DESKTOP(option_mask32 & BIT_TRAVERSE) SKIP_DESKTOP(0))
/* -H or -L */
#define OPT_TRAVERSETOP (USE_DESKTOP(option_mask32 & BIT_TRAVERSETOP) SKIP_DESKTOP(0))
static int fileAction(const char *fileName, struct stat *statbuf,
void ATTRIBUTE_UNUSED *junk, int depth)
{
if (!chown_func(fileName,
(ugid.uid == (uid_t)-1) ? statbuf->st_uid : ugid.uid,
(ugid.gid == (gid_t)-1) ? statbuf->st_gid : ugid.gid)
) {
if (OPT_VERBOSE
|| (OPT_CHANGED && (statbuf->st_uid != ugid.uid || statbuf->st_gid != ugid.gid))
) {
printf("changed ownership of '%s' to %u:%u\n",
fileName, ugid.uid, ugid.gid);
}
return TRUE;
}
if (!OPT_QUIET)
bb_perror_msg("%s", fileName); /* A filename can have % in it... */
return FALSE;
}
int chown_main(int argc, char **argv);
int chown_main(int argc, char **argv)
{
int retval = EXIT_SUCCESS;
opt_complementary = "-2";
getopt32(argc, argv, OPT_STR);
argv += optind;
/* This matches coreutils behavior (almost - see below) */
if (OPT_NODEREF
/* || (OPT_RECURSE && !OPT_TRAVERSETOP): */
USE_DESKTOP( || (option_mask32 & (BIT_RECURSE|BIT_TRAVERSETOP)) == BIT_RECURSE)
) {
chown_func = lchown;
}
parse_chown_usergroup_or_die(&ugid, argv[0]);
/* Ok, ready to do the deed now */
argv++;
do {
char *arg = *argv;
if (OPT_TRAVERSETOP) {
/* resolves symlink (even recursive) */
arg = xmalloc_realpath(arg);
if (!arg)
continue;
}
if (!recursive_action(arg,
OPT_RECURSE, // recurse
OPT_TRAVERSE, // follow links if -L
FALSE, // depth first
fileAction, // file action
fileAction, // dir action
NULL, // user data
0) // depth
) {
retval = EXIT_FAILURE;
}
if (OPT_TRAVERSETOP)
free(arg);
} while (*++argv);
return retval;
}
/*
Testcase. Run in empty directory.
#!/bin/sh
t1="/tmp/busybox chown"
t2="/usr/bin/chown"
create() {
rm -rf $1; mkdir $1
(
cd $1 || exit 1
mkdir dir dir2
>up
>file
>dir/file
>dir2/file
ln -s dir linkdir
ln -s file linkfile
ln -s ../up dir/linkup
ln -s ../dir2 dir/linkupdir2
)
chown -R 0:0 $1
}
tst() {
create test1
create test2
(cd test1; $t1 $1)
(cd test2; $t2 $1)
(cd test1; ls -lnR) >out1
(cd test2; ls -lnR) >out2
echo "chown $1" >out.diff
if ! diff -u out1 out2 >>out.diff; then exit 1; fi
rm out.diff
}
tst_for_each() {
tst "$1 1:1 file"
tst "$1 1:1 dir"
tst "$1 1:1 linkdir"
tst "$1 1:1 linkfile"
}
echo "If script produced 'out.diff' file, then at least one testcase failed"
# These match coreutils 6.8:
tst_for_each ""
tst_for_each "-R"
tst_for_each "-RP"
tst_for_each "-RL"
tst_for_each "-RH"
tst_for_each "-h"
tst_for_each "-hR"
tst_for_each "-hRP"
# Below: with "chown linkdir" coreutils 6.8 will chown linkdir _target_,
# we lchown _the link_. I believe we are "more correct".
#tst_for_each "-hRL"
#tst_for_each "-hRH"
*/
|
