Contents of /trunk/mkinitrd-magellan/busybox/coreutils/chown.c
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 5145 byte(s)
-updated to busybox-1.17.1
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 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */ |
12 | |
13 | #include "libbb.h" |
14 | |
15 | /* This is a NOEXEC applet. Be very careful! */ |
16 | |
17 | |
18 | #define OPT_STR ("Rh" IF_DESKTOP("vcfLHP")) |
19 | #define BIT_RECURSE 1 |
20 | #define OPT_RECURSE (opt & 1) |
21 | #define OPT_NODEREF (opt & 2) |
22 | #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 | /* POSIX options |
26 | * -L traverse every symbolic link to a directory encountered |
27 | * -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 | * 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 | #define OPT_TRAVERSE (IF_DESKTOP(opt & BIT_TRAVERSE) IF_NOT_DESKTOP(0)) |
35 | /* -H or -L */ |
36 | #define BIT_TRAVERSE_TOP (0x20|0x40) |
37 | #define OPT_TRAVERSE_TOP (IF_DESKTOP(opt & BIT_TRAVERSE_TOP) IF_NOT_DESKTOP(0)) |
38 | |
39 | #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 | 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 | { |
63 | #define param (*(struct param_t*)vparam) |
64 | #define opt option_mask32 |
65 | 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 | |
68 | if (param.chown_func(fileName, u, g) == 0) { |
69 | if (OPT_VERBOSE |
70 | || (OPT_CHANGED && (statbuf->st_uid != u || statbuf->st_gid != g)) |
71 | ) { |
72 | printf("changed ownership of '%s' to %u:%u\n", |
73 | fileName, (unsigned)u, (unsigned)g); |
74 | } |
75 | return TRUE; |
76 | } |
77 | if (!OPT_QUIET) |
78 | bb_simple_perror_msg(fileName); |
79 | return FALSE; |
80 | #undef opt |
81 | #undef param |
82 | } |
83 | |
84 | int chown_main(int argc UNUSED_PARAM, char **argv) |
85 | { |
86 | int retval = EXIT_SUCCESS; |
87 | int opt, flags; |
88 | struct param_t param; |
89 | |
90 | /* Just -1 might not work: uid_t may be unsigned long */ |
91 | param.ugid.uid = -1L; |
92 | param.ugid.gid = -1L; |
93 | |
94 | #if ENABLE_FEATURE_CHOWN_LONG_OPTIONS |
95 | applet_long_options = chown_longopts; |
96 | #endif |
97 | opt_complementary = "-2"; |
98 | opt = getopt32(argv, OPT_STR); |
99 | argv += optind; |
100 | |
101 | /* This matches coreutils behavior (almost - see below) */ |
102 | param.chown_func = chown; |
103 | if (OPT_NODEREF |
104 | /* || (OPT_RECURSE && !OPT_TRAVERSE_TOP): */ |
105 | IF_DESKTOP( || (opt & (BIT_RECURSE|BIT_TRAVERSE_TOP)) == BIT_RECURSE) |
106 | ) { |
107 | param.chown_func = lchown; |
108 | } |
109 | |
110 | 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 | |
118 | parse_chown_usergroup_or_die(¶m.ugid, argv[0]); |
119 | |
120 | /* Ok, ready to do the deed now */ |
121 | while (*++argv) { |
122 | if (!recursive_action(*argv, |
123 | flags, /* flags */ |
124 | fileAction, /* file action */ |
125 | fileAction, /* dir action */ |
126 | ¶m, /* user data */ |
127 | 0) /* depth */ |
128 | ) { |
129 | retval = EXIT_FAILURE; |
130 | } |
131 | } |
132 | |
133 | return retval; |
134 | } |
135 | |
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 | */ |