1 /* vi: set sw=4 ts=4: */
3 * Mini chown implementation for busybox
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
10 /* BB_AUDIT SUSv3 defects - none? */
11 /* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
13 //usage:#define chown_trivial_usage
14 //usage: "[-RhLHP"IF_DESKTOP("cvf")"]... OWNER[<.|:>[GROUP]] FILE..."
15 //usage:#define chown_full_usage "\n\n"
16 //usage: "Change the owner and/or group of each FILE to OWNER and/or GROUP\n"
17 //usage: "\n -R Recurse"
18 //usage: "\n -h Affect symlinks instead of symlink targets"
20 //usage: "\n -L Traverse all symlinks to directories"
21 //usage: "\n -H Traverse symlinks on command line only"
22 //usage: "\n -P Don't traverse symlinks (default)"
23 //usage: "\n -c List changed files"
24 //usage: "\n -v List all files"
25 //usage: "\n -f Hide errors"
28 //usage:#define chown_example_usage
29 //usage: "$ ls -l /tmp/foo\n"
30 //usage: "-r--r--r-- 1 andersen andersen 0 Apr 12 18:25 /tmp/foo\n"
31 //usage: "$ chown root /tmp/foo\n"
32 //usage: "$ ls -l /tmp/foo\n"
33 //usage: "-r--r--r-- 1 root andersen 0 Apr 12 18:25 /tmp/foo\n"
34 //usage: "$ chown root.root /tmp/foo\n"
35 //usage: "ls -l /tmp/foo\n"
36 //usage: "-r--r--r-- 1 root root 0 Apr 12 18:25 /tmp/foo\n"
40 /* This is a NOEXEC applet. Be very careful! */
43 #define OPT_STR ("Rh" IF_DESKTOP("vcfLHP"))
45 #define OPT_RECURSE (opt & 1)
46 #define OPT_NODEREF (opt & 2)
47 #define OPT_VERBOSE (IF_DESKTOP(opt & 0x04) IF_NOT_DESKTOP(0))
48 #define OPT_CHANGED (IF_DESKTOP(opt & 0x08) IF_NOT_DESKTOP(0))
49 #define OPT_QUIET (IF_DESKTOP(opt & 0x10) IF_NOT_DESKTOP(0))
51 * -L traverse every symbolic link to a directory encountered
52 * -H if a command line argument is a symbolic link to a directory, traverse it
53 * -P do not traverse any symbolic links (default)
54 * We do not conform to the following:
55 * "Specifying more than one of -H, -L, and -P is not an error.
56 * The last option specified shall determine the behavior of the utility." */
58 #define BIT_TRAVERSE 0x20
59 #define OPT_TRAVERSE (IF_DESKTOP(opt & BIT_TRAVERSE) IF_NOT_DESKTOP(0))
61 #define BIT_TRAVERSE_TOP (0x20|0x40)
62 #define OPT_TRAVERSE_TOP (IF_DESKTOP(opt & BIT_TRAVERSE_TOP) IF_NOT_DESKTOP(0))
64 #if ENABLE_FEATURE_CHOWN_LONG_OPTIONS
65 static const char chown_longopts[] ALIGN1 =
66 "recursive\0" No_argument "R"
67 "dereference\0" No_argument "\xff"
68 "no-dereference\0" No_argument "h"
70 "changes\0" No_argument "c"
71 "silent\0" No_argument "f"
72 "quiet\0" No_argument "f"
73 "verbose\0" No_argument "v"
78 typedef int (*chown_fptr)(const char *, uid_t, gid_t);
81 struct bb_uidgid_t ugid;
82 chown_fptr chown_func;
85 static int FAST_FUNC fileAction(const char *fileName, struct stat *statbuf,
86 void *vparam, int depth UNUSED_PARAM)
88 #define param (*(struct param_t*)vparam)
89 #define opt option_mask32
90 uid_t u = (param.ugid.uid == (uid_t)-1L) ? statbuf->st_uid : param.ugid.uid;
91 gid_t g = (param.ugid.gid == (gid_t)-1L) ? statbuf->st_gid : param.ugid.gid;
93 if (param.chown_func(fileName, u, g) == 0) {
95 || (OPT_CHANGED && (statbuf->st_uid != u || statbuf->st_gid != g))
97 printf("changed ownership of '%s' to %u:%u\n",
98 fileName, (unsigned)u, (unsigned)g);
103 bb_simple_perror_msg(fileName);
109 int chown_main(int argc UNUSED_PARAM, char **argv)
111 int retval = EXIT_SUCCESS;
113 struct param_t param;
115 /* Just -1 might not work: uid_t may be unsigned long */
116 param.ugid.uid = -1L;
117 param.ugid.gid = -1L;
119 #if ENABLE_FEATURE_CHOWN_LONG_OPTIONS
120 applet_long_options = chown_longopts;
122 opt_complementary = "-2";
123 opt = getopt32(argv, OPT_STR);
126 /* This matches coreutils behavior (almost - see below) */
127 param.chown_func = chown;
129 /* || (OPT_RECURSE && !OPT_TRAVERSE_TOP): */
130 IF_DESKTOP( || (opt & (BIT_RECURSE|BIT_TRAVERSE_TOP)) == BIT_RECURSE)
132 param.chown_func = lchown;
135 flags = ACTION_DEPTHFIRST; /* match coreutils order */
137 flags |= ACTION_RECURSE;
138 if (OPT_TRAVERSE_TOP)
139 flags |= ACTION_FOLLOWLINKS_L0; /* -H/-L: follow links on depth 0 */
141 flags |= ACTION_FOLLOWLINKS; /* follow links if -L */
143 parse_chown_usergroup_or_die(¶m.ugid, argv[0]);
145 /* Ok, ready to do the deed now */
147 if (!recursive_action(*argv,
149 fileAction, /* file action */
150 fileAction, /* dir action */
151 ¶m, /* user data */
154 retval = EXIT_FAILURE;
162 Testcase. Run in empty directory.
165 t1="/tmp/busybox chown"
178 ln -s ../up dir/linkup
179 ln -s ../dir2 dir/linkupdir2
186 echo "[$1]" >>test1.out
187 echo "[$1]" >>test2.out
188 (cd test1; $t1 $1) >>test1.out 2>&1
189 (cd test2; $t2 $1) >>test2.out 2>&1
190 (cd test1; ls -lnR) >out1
191 (cd test2; ls -lnR) >out2
192 echo "chown $1" >out.diff
193 if ! diff -u out1 out2 >>out.diff; then exit 1; fi
200 tst "$1 1:1 linkfile"
202 echo "If script produced 'out.diff' file, then at least one testcase failed"
205 # These match coreutils 6.8:
216 # Fix `name' in coreutils output
217 sed 's/`/'"'"'/g' -i test2.out
218 # Compare us with coreutils output
219 diff -u test1.out test2.out