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 tarball for details.
10 /* BB_AUDIT SUSv3 defects - none? */
11 /* BB_AUDIT GNU defects - unsupported long options. */
12 /* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
16 static struct bb_uidgid_t ugid = { -1, -1 };
18 static int (*chown_func)(const char *, uid_t, gid_t) = chown;
20 #define OPT_STR ("Rh" USE_DESKTOP("vcfLHP"))
22 #define OPT_RECURSE (option_mask32 & 1)
23 #define OPT_NODEREF (option_mask32 & 2)
24 #define OPT_VERBOSE (USE_DESKTOP(option_mask32 & 0x04) SKIP_DESKTOP(0))
25 #define OPT_CHANGED (USE_DESKTOP(option_mask32 & 0x08) SKIP_DESKTOP(0))
26 #define OPT_QUIET (USE_DESKTOP(option_mask32 & 0x10) SKIP_DESKTOP(0))
28 * -L traverse every symbolic link to a directory encountered
29 * -H if a command line argument is a symbolic link to a directory, traverse it
30 * -P do not traverse any symbolic links (default)
31 * We do not conform to the following:
32 * "Specifying more than one of -H, -L, and -P is not an error.
33 * The last option specified shall determine the behavior of the utility." */
35 #define BIT_TRAVERSE 0x20
36 #define OPT_TRAVERSE (USE_DESKTOP(option_mask32 & BIT_TRAVERSE) SKIP_DESKTOP(0))
38 #define BIT_TRAVERSE_TOP (0x20|0x40)
39 #define OPT_TRAVERSE_TOP (USE_DESKTOP(option_mask32 & BIT_TRAVERSE_TOP) SKIP_DESKTOP(0))
41 static int fileAction(const char *fileName, struct stat *statbuf,
42 void ATTRIBUTE_UNUSED *junk, int depth)
44 uid_t u = (ugid.uid == (uid_t)-1) ? statbuf->st_uid : ugid.uid;
45 gid_t g = (ugid.gid == (gid_t)-1) ? statbuf->st_gid : ugid.gid;
47 if (!chown_func(fileName, u, g)) {
49 || (OPT_CHANGED && (statbuf->st_uid != u || statbuf->st_gid != g))
51 printf("changed ownership of '%s' to %u:%u\n",
52 fileName, (unsigned)u, (unsigned)g);
57 bb_perror_msg("%s", fileName); /* A filename can have % in it... */
61 int chown_main(int argc, char **argv);
62 int chown_main(int argc, char **argv)
64 int retval = EXIT_SUCCESS;
66 opt_complementary = "-2";
67 getopt32(argc, argv, OPT_STR);
70 /* This matches coreutils behavior (almost - see below) */
72 /* || (OPT_RECURSE && !OPT_TRAVERSE_TOP): */
73 USE_DESKTOP( || (option_mask32 & (BIT_RECURSE|BIT_TRAVERSE_TOP)) == BIT_RECURSE)
78 parse_chown_usergroup_or_die(&ugid, argv[0]);
80 /* Ok, ready to do the deed now */
85 if (OPT_TRAVERSE_TOP) {
86 /* resolves symlink (even recursive) */
87 arg = xmalloc_realpath(arg);
92 if (!recursive_action(arg,
93 OPT_RECURSE, // recurse
94 OPT_TRAVERSE, // follow links if -L
96 fileAction, // file action
97 fileAction, // dir action
101 retval = EXIT_FAILURE;
104 if (OPT_TRAVERSE_TOP)
112 Testcase. Run in empty directory.
115 t1="/tmp/busybox chown"
128 ln -s ../up dir/linkup
129 ln -s ../dir2 dir/linkupdir2
138 (cd test1; ls -lnR) >out1
139 (cd test2; ls -lnR) >out2
140 echo "chown $1" >out.diff
141 if ! diff -u out1 out2 >>out.diff; then exit 1; fi
148 tst "$1 1:1 linkfile"
150 echo "If script produced 'out.diff' file, then at least one testcase failed"
151 # These match coreutils 6.8:
160 # Below: with "chown linkdir" coreutils 6.8 will chown linkdir _target_,
161 # we lchown _the link_. I believe we are "more correct".