Annotation of /tags/mkinitrd-6_3_1/busybox/coreutils/chown.c
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/coreutils/chown.c
File MIME type: text/plain
File size: 5145 byte(s)
Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
Original Path: trunk/mkinitrd-magellan/busybox/coreutils/chown.c
File MIME type: text/plain
File size: 5145 byte(s)
-updated to busybox-1.17.1
1 | niro | 532 | /* 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 | niro | 816 | /* BB_AUDIT SUSv3 defects - none? */ |
11 | niro | 532 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */ |
12 | |||
13 | niro | 816 | #include "libbb.h" |
14 | niro | 532 | |
15 | niro | 816 | /* This is a NOEXEC applet. Be very careful! */ |
16 | niro | 532 | |
17 | |||
18 | niro | 984 | #define OPT_STR ("Rh" IF_DESKTOP("vcfLHP")) |
19 | niro | 816 | #define BIT_RECURSE 1 |
20 | #define OPT_RECURSE (opt & 1) | ||
21 | #define OPT_NODEREF (opt & 2) | ||
22 | niro | 984 | #define OPT_VERBOSE (IF_DESKTOP(opt & 0x04) IF_NOT_DESKTOP(0)) |
23 | #define OPT_CHANGED (IF_DESKTOP(opt & 0x08) IF_NOT_DESKTOP(0)) | ||
24 | #define OPT_QUIET (IF_DESKTOP(opt & 0x10) IF_NOT_DESKTOP(0)) | ||
25 | niro | 816 | /* POSIX options |
26 | * -L traverse every symbolic link to a directory encountered | ||
27 | niro | 532 | * -H if a command line argument is a symbolic link to a directory, traverse it |
28 | * -P do not traverse any symbolic links (default) | ||
29 | niro | 816 | * We do not conform to the following: |
30 | * "Specifying more than one of -H, -L, and -P is not an error. | ||
31 | * The last option specified shall determine the behavior of the utility." */ | ||
32 | /* -L */ | ||
33 | #define BIT_TRAVERSE 0x20 | ||
34 | niro | 984 | #define OPT_TRAVERSE (IF_DESKTOP(opt & BIT_TRAVERSE) IF_NOT_DESKTOP(0)) |
35 | niro | 816 | /* -H or -L */ |
36 | #define BIT_TRAVERSE_TOP (0x20|0x40) | ||
37 | niro | 984 | #define OPT_TRAVERSE_TOP (IF_DESKTOP(opt & BIT_TRAVERSE_TOP) IF_NOT_DESKTOP(0)) |
38 | niro | 532 | |
39 | niro | 984 | #if ENABLE_FEATURE_CHOWN_LONG_OPTIONS |
40 | static const char chown_longopts[] ALIGN1 = | ||
41 | "recursive\0" No_argument "R" | ||
42 | "dereference\0" No_argument "\xff" | ||
43 | "no-dereference\0" No_argument "h" | ||
44 | # if ENABLE_DESKTOP | ||
45 | "changes\0" No_argument "c" | ||
46 | "silent\0" No_argument "f" | ||
47 | "quiet\0" No_argument "f" | ||
48 | "verbose\0" No_argument "v" | ||
49 | # endif | ||
50 | ; | ||
51 | #endif | ||
52 | |||
53 | niro | 816 | typedef int (*chown_fptr)(const char *, uid_t, gid_t); |
54 | |||
55 | struct param_t { | ||
56 | struct bb_uidgid_t ugid; | ||
57 | chown_fptr chown_func; | ||
58 | }; | ||
59 | |||
60 | static int FAST_FUNC fileAction(const char *fileName, struct stat *statbuf, | ||
61 | void *vparam, int depth UNUSED_PARAM) | ||
62 | niro | 532 | { |
63 | niro | 816 | #define param (*(struct param_t*)vparam) |
64 | #define opt option_mask32 | ||
65 | niro | 1123 | uid_t u = (param.ugid.uid == (uid_t)-1L) ? statbuf->st_uid : param.ugid.uid; |
66 | gid_t g = (param.ugid.gid == (gid_t)-1L) ? statbuf->st_gid : param.ugid.gid; | ||
67 | niro | 532 | |
68 | niro | 816 | if (param.chown_func(fileName, u, g) == 0) { |
69 | niro | 532 | if (OPT_VERBOSE |
70 | niro | 816 | || (OPT_CHANGED && (statbuf->st_uid != u || statbuf->st_gid != g)) |
71 | niro | 532 | ) { |
72 | printf("changed ownership of '%s' to %u:%u\n", | ||
73 | niro | 816 | fileName, (unsigned)u, (unsigned)g); |
74 | niro | 532 | } |
75 | return TRUE; | ||
76 | } | ||
77 | if (!OPT_QUIET) | ||
78 | niro | 1123 | bb_simple_perror_msg(fileName); |
79 | niro | 532 | return FALSE; |
80 | niro | 816 | #undef opt |
81 | #undef param | ||
82 | niro | 532 | } |
83 | |||
84 | niro | 816 | int chown_main(int argc UNUSED_PARAM, char **argv) |
85 | niro | 532 | { |
86 | int retval = EXIT_SUCCESS; | ||
87 | niro | 816 | int opt, flags; |
88 | struct param_t param; | ||
89 | niro | 532 | |
90 | niro | 1123 | /* Just -1 might not work: uid_t may be unsigned long */ |
91 | param.ugid.uid = -1L; | ||
92 | param.ugid.gid = -1L; | ||
93 | niro | 816 | |
94 | niro | 984 | #if ENABLE_FEATURE_CHOWN_LONG_OPTIONS |
95 | applet_long_options = chown_longopts; | ||
96 | #endif | ||
97 | niro | 532 | opt_complementary = "-2"; |
98 | niro | 816 | opt = getopt32(argv, OPT_STR); |
99 | niro | 532 | argv += optind; |
100 | |||
101 | niro | 816 | /* This matches coreutils behavior (almost - see below) */ |
102 | niro | 984 | param.chown_func = chown; |
103 | niro | 816 | if (OPT_NODEREF |
104 | /* || (OPT_RECURSE && !OPT_TRAVERSE_TOP): */ | ||
105 | niro | 984 | IF_DESKTOP( || (opt & (BIT_RECURSE|BIT_TRAVERSE_TOP)) == BIT_RECURSE) |
106 | niro | 816 | ) { |
107 | param.chown_func = lchown; | ||
108 | } | ||
109 | niro | 532 | |
110 | niro | 816 | flags = ACTION_DEPTHFIRST; /* match coreutils order */ |
111 | if (OPT_RECURSE) | ||
112 | flags |= ACTION_RECURSE; | ||
113 | if (OPT_TRAVERSE_TOP) | ||
114 | flags |= ACTION_FOLLOWLINKS_L0; /* -H/-L: follow links on depth 0 */ | ||
115 | if (OPT_TRAVERSE) | ||
116 | flags |= ACTION_FOLLOWLINKS; /* follow links if -L */ | ||
117 | niro | 532 | |
118 | niro | 816 | parse_chown_usergroup_or_die(¶m.ugid, argv[0]); |
119 | niro | 532 | |
120 | /* Ok, ready to do the deed now */ | ||
121 | niro | 984 | while (*++argv) { |
122 | niro | 532 | if (!recursive_action(*argv, |
123 | niro | 816 | flags, /* flags */ |
124 | fileAction, /* file action */ | ||
125 | fileAction, /* dir action */ | ||
126 | ¶m, /* user data */ | ||
127 | 0) /* depth */ | ||
128 | niro | 532 | ) { |
129 | retval = EXIT_FAILURE; | ||
130 | } | ||
131 | niro | 984 | } |
132 | niro | 532 | |
133 | return retval; | ||
134 | } | ||
135 | niro | 816 | |
136 | /* | ||
137 | Testcase. Run in empty directory. | ||
138 | |||
139 | #!/bin/sh | ||
140 | t1="/tmp/busybox chown" | ||
141 | t2="/usr/bin/chown" | ||
142 | create() { | ||
143 | rm -rf $1; mkdir $1 | ||
144 | ( | ||
145 | cd $1 || exit 1 | ||
146 | mkdir dir dir2 | ||
147 | >up | ||
148 | >file | ||
149 | >dir/file | ||
150 | >dir2/file | ||
151 | ln -s dir linkdir | ||
152 | ln -s file linkfile | ||
153 | ln -s ../up dir/linkup | ||
154 | ln -s ../dir2 dir/linkupdir2 | ||
155 | ) | ||
156 | chown -R 0:0 $1 | ||
157 | } | ||
158 | tst() { | ||
159 | create test1 | ||
160 | create test2 | ||
161 | echo "[$1]" >>test1.out | ||
162 | echo "[$1]" >>test2.out | ||
163 | (cd test1; $t1 $1) >>test1.out 2>&1 | ||
164 | (cd test2; $t2 $1) >>test2.out 2>&1 | ||
165 | (cd test1; ls -lnR) >out1 | ||
166 | (cd test2; ls -lnR) >out2 | ||
167 | echo "chown $1" >out.diff | ||
168 | if ! diff -u out1 out2 >>out.diff; then exit 1; fi | ||
169 | rm out.diff | ||
170 | } | ||
171 | tst_for_each() { | ||
172 | tst "$1 1:1 file" | ||
173 | tst "$1 1:1 dir" | ||
174 | tst "$1 1:1 linkdir" | ||
175 | tst "$1 1:1 linkfile" | ||
176 | } | ||
177 | echo "If script produced 'out.diff' file, then at least one testcase failed" | ||
178 | >test1.out | ||
179 | >test2.out | ||
180 | # These match coreutils 6.8: | ||
181 | tst_for_each "-v" | ||
182 | tst_for_each "-vR" | ||
183 | tst_for_each "-vRP" | ||
184 | tst_for_each "-vRL" | ||
185 | tst_for_each "-vRH" | ||
186 | tst_for_each "-vh" | ||
187 | tst_for_each "-vhR" | ||
188 | tst_for_each "-vhRP" | ||
189 | tst_for_each "-vhRL" | ||
190 | tst_for_each "-vhRH" | ||
191 | # Fix `name' in coreutils output | ||
192 | sed 's/`/'"'"'/g' -i test2.out | ||
193 | # Compare us with coreutils output | ||
194 | diff -u test1.out test2.out | ||
195 | |||
196 | */ |