1 | /* vi: set sw=4 ts=4: */
|
---|
2 | /*
|
---|
3 | * Mini chown implementation for busybox
|
---|
4 | *
|
---|
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
|
---|
6 | *
|
---|
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
8 | */
|
---|
9 |
|
---|
10 | /* BB_AUDIT SUSv3 defects - none? */
|
---|
11 | /* BB_AUDIT GNU defects - unsupported long options. */
|
---|
12 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
|
---|
13 |
|
---|
14 | #include "libbb.h"
|
---|
15 |
|
---|
16 | /* This is a NOEXEC applet. Be very careful! */
|
---|
17 |
|
---|
18 |
|
---|
19 | #define OPT_STR ("Rh" USE_DESKTOP("vcfLHP"))
|
---|
20 | #define BIT_RECURSE 1
|
---|
21 | #define OPT_RECURSE (option_mask32 & 1)
|
---|
22 | #define OPT_NODEREF (option_mask32 & 2)
|
---|
23 | #define OPT_VERBOSE (USE_DESKTOP(option_mask32 & 0x04) SKIP_DESKTOP(0))
|
---|
24 | #define OPT_CHANGED (USE_DESKTOP(option_mask32 & 0x08) SKIP_DESKTOP(0))
|
---|
25 | #define OPT_QUIET (USE_DESKTOP(option_mask32 & 0x10) SKIP_DESKTOP(0))
|
---|
26 | /* POSIX options
|
---|
27 | * -L traverse every symbolic link to a directory encountered
|
---|
28 | * -H if a command line argument is a symbolic link to a directory, traverse it
|
---|
29 | * -P do not traverse any symbolic links (default)
|
---|
30 | * We do not conform to the following:
|
---|
31 | * "Specifying more than one of -H, -L, and -P is not an error.
|
---|
32 | * The last option specified shall determine the behavior of the utility." */
|
---|
33 | /* -L */
|
---|
34 | #define BIT_TRAVERSE 0x20
|
---|
35 | #define OPT_TRAVERSE (USE_DESKTOP(option_mask32 & BIT_TRAVERSE) SKIP_DESKTOP(0))
|
---|
36 | /* -H or -L */
|
---|
37 | #define BIT_TRAVERSE_TOP (0x20|0x40)
|
---|
38 | #define OPT_TRAVERSE_TOP (USE_DESKTOP(option_mask32 & BIT_TRAVERSE_TOP) SKIP_DESKTOP(0))
|
---|
39 |
|
---|
40 | typedef int (*chown_fptr)(const char *, uid_t, gid_t);
|
---|
41 |
|
---|
42 | static struct bb_uidgid_t ugid = { -1, -1 };
|
---|
43 |
|
---|
44 | static int fileAction(const char *fileName, struct stat *statbuf,
|
---|
45 | void *cf, int depth)
|
---|
46 | {
|
---|
47 | uid_t u = (ugid.uid == (uid_t)-1) ? statbuf->st_uid : ugid.uid;
|
---|
48 | gid_t g = (ugid.gid == (gid_t)-1) ? statbuf->st_gid : ugid.gid;
|
---|
49 |
|
---|
50 | if (!((chown_fptr)cf)(fileName, u, g)) {
|
---|
51 | if (OPT_VERBOSE
|
---|
52 | || (OPT_CHANGED && (statbuf->st_uid != u || statbuf->st_gid != g))
|
---|
53 | ) {
|
---|
54 | printf("changed ownership of '%s' to %u:%u\n",
|
---|
55 | fileName, (unsigned)u, (unsigned)g);
|
---|
56 | }
|
---|
57 | return TRUE;
|
---|
58 | }
|
---|
59 | if (!OPT_QUIET)
|
---|
60 | bb_perror_msg("%s", fileName); /* A filename can have % in it... */
|
---|
61 | return FALSE;
|
---|
62 | }
|
---|
63 |
|
---|
64 | int chown_main(int argc, char **argv);
|
---|
65 | int chown_main(int argc, char **argv)
|
---|
66 | {
|
---|
67 | int retval = EXIT_SUCCESS;
|
---|
68 | int flags;
|
---|
69 | chown_fptr chown_func;
|
---|
70 |
|
---|
71 | opt_complementary = "-2";
|
---|
72 | getopt32(argv, OPT_STR);
|
---|
73 | argv += optind;
|
---|
74 |
|
---|
75 | /* This matches coreutils behavior (almost - see below) */
|
---|
76 | chown_func = chown;
|
---|
77 | if (OPT_NODEREF
|
---|
78 | /* || (OPT_RECURSE && !OPT_TRAVERSE_TOP): */
|
---|
79 | USE_DESKTOP( || (option_mask32 & (BIT_RECURSE|BIT_TRAVERSE_TOP)) == BIT_RECURSE)
|
---|
80 | ) {
|
---|
81 | chown_func = lchown;
|
---|
82 | }
|
---|
83 |
|
---|
84 | flags = ACTION_DEPTHFIRST; /* match coreutils order */
|
---|
85 | if (OPT_RECURSE)
|
---|
86 | flags |= ACTION_RECURSE;
|
---|
87 | if (OPT_TRAVERSE_TOP)
|
---|
88 | flags |= ACTION_FOLLOWLINKS_L0; /* -H/-L: follow links on depth 0 */
|
---|
89 | if (OPT_TRAVERSE)
|
---|
90 | flags |= ACTION_FOLLOWLINKS; /* follow links if -L */
|
---|
91 |
|
---|
92 | parse_chown_usergroup_or_die(&ugid, argv[0]);
|
---|
93 |
|
---|
94 | /* Ok, ready to do the deed now */
|
---|
95 | argv++;
|
---|
96 | do {
|
---|
97 | if (!recursive_action(*argv,
|
---|
98 | flags, /* flags */
|
---|
99 | fileAction, /* file action */
|
---|
100 | fileAction, /* dir action */
|
---|
101 | chown_func, /* user data */
|
---|
102 | 0) /* depth */
|
---|
103 | ) {
|
---|
104 | retval = EXIT_FAILURE;
|
---|
105 | }
|
---|
106 | } while (*++argv);
|
---|
107 |
|
---|
108 | return retval;
|
---|
109 | }
|
---|
110 |
|
---|
111 | /*
|
---|
112 | Testcase. Run in empty directory.
|
---|
113 |
|
---|
114 | #!/bin/sh
|
---|
115 | t1="/tmp/busybox chown"
|
---|
116 | t2="/usr/bin/chown"
|
---|
117 | create() {
|
---|
118 | rm -rf $1; mkdir $1
|
---|
119 | (
|
---|
120 | cd $1 || exit 1
|
---|
121 | mkdir dir dir2
|
---|
122 | >up
|
---|
123 | >file
|
---|
124 | >dir/file
|
---|
125 | >dir2/file
|
---|
126 | ln -s dir linkdir
|
---|
127 | ln -s file linkfile
|
---|
128 | ln -s ../up dir/linkup
|
---|
129 | ln -s ../dir2 dir/linkupdir2
|
---|
130 | )
|
---|
131 | chown -R 0:0 $1
|
---|
132 | }
|
---|
133 | tst() {
|
---|
134 | create test1
|
---|
135 | create test2
|
---|
136 | echo "[$1]" >>test1.out
|
---|
137 | echo "[$1]" >>test2.out
|
---|
138 | (cd test1; $t1 $1) >>test1.out 2>&1
|
---|
139 | (cd test2; $t2 $1) >>test2.out 2>&1
|
---|
140 | (cd test1; ls -lnR) >out1
|
---|
141 | (cd test2; ls -lnR) >out2
|
---|
142 | echo "chown $1" >out.diff
|
---|
143 | if ! diff -u out1 out2 >>out.diff; then exit 1; fi
|
---|
144 | rm out.diff
|
---|
145 | }
|
---|
146 | tst_for_each() {
|
---|
147 | tst "$1 1:1 file"
|
---|
148 | tst "$1 1:1 dir"
|
---|
149 | tst "$1 1:1 linkdir"
|
---|
150 | tst "$1 1:1 linkfile"
|
---|
151 | }
|
---|
152 | echo "If script produced 'out.diff' file, then at least one testcase failed"
|
---|
153 | >test1.out
|
---|
154 | >test2.out
|
---|
155 | # These match coreutils 6.8:
|
---|
156 | tst_for_each "-v"
|
---|
157 | tst_for_each "-vR"
|
---|
158 | tst_for_each "-vRP"
|
---|
159 | tst_for_each "-vRL"
|
---|
160 | tst_for_each "-vRH"
|
---|
161 | tst_for_each "-vh"
|
---|
162 | tst_for_each "-vhR"
|
---|
163 | tst_for_each "-vhRP"
|
---|
164 | tst_for_each "-vhRL"
|
---|
165 | tst_for_each "-vhRH"
|
---|
166 | # Fix `name' in coreutils output
|
---|
167 | sed 's/`/'"'"'/g' -i test2.out
|
---|
168 | # Compare us with coreutils output
|
---|
169 | diff -u test1.out test2.out
|
---|
170 |
|
---|
171 | */
|
---|