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 /* This is a NOEXEC applet. Be very careful! */
19 #define OPT_STR ("Rh" USE_DESKTOP("vcfLHP"))
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))
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." */
34 #define BIT_TRAVERSE 0x20
35 #define OPT_TRAVERSE (USE_DESKTOP(option_mask32 & BIT_TRAVERSE) SKIP_DESKTOP(0))
37 #define BIT_TRAVERSE_TOP (0x20|0x40)
38 #define OPT_TRAVERSE_TOP (USE_DESKTOP(option_mask32 & BIT_TRAVERSE_TOP) SKIP_DESKTOP(0))
40 typedef int (*chown_fptr)(const char *, uid_t, gid_t);
42 static struct bb_uidgid_t ugid = { -1, -1 };
44 static int fileAction(const char *fileName, struct stat *statbuf,
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;
50 if (!((chown_fptr)cf)(fileName, u, g)) {
52 || (OPT_CHANGED && (statbuf->st_uid != u || statbuf->st_gid != g))
54 printf("changed ownership of '%s' to %u:%u\n",
55 fileName, (unsigned)u, (unsigned)g);
60 bb_perror_msg("%s", fileName); /* A filename can have % in it... */
64 int chown_main(int argc, char **argv);
65 int chown_main(int argc, char **argv)
67 int retval = EXIT_SUCCESS;
68 chown_fptr chown_func;
70 opt_complementary = "-2";
71 getopt32(argc, argv, OPT_STR);
74 /* This matches coreutils behavior (almost - see below) */
77 /* || (OPT_RECURSE && !OPT_TRAVERSE_TOP): */
78 USE_DESKTOP( || (option_mask32 & (BIT_RECURSE|BIT_TRAVERSE_TOP)) == BIT_RECURSE)
83 parse_chown_usergroup_or_die(&ugid, argv[0]);
85 /* Ok, ready to do the deed now */
90 if (OPT_TRAVERSE_TOP) {
91 /* resolves symlink (even recursive) */
92 arg = xmalloc_realpath(arg);
97 if (!recursive_action(arg,
98 (OPT_RECURSE ? ACTION_RECURSE : 0) | /* recurse */
99 (OPT_TRAVERSE ? ACTION_FOLLOWLINKS : 0),/* follow links if -L */
100 fileAction, /* file action */
101 fileAction, /* dir action */
102 chown_func, /* user data */
105 retval = EXIT_FAILURE;
108 if (OPT_TRAVERSE_TOP)
116 Testcase. Run in empty directory.
119 t1="/tmp/busybox chown"
132 ln -s ../up dir/linkup
133 ln -s ../dir2 dir/linkupdir2
142 (cd test1; ls -lnR) >out1
143 (cd test2; ls -lnR) >out2
144 echo "chown $1" >out.diff
145 if ! diff -u out1 out2 >>out.diff; then exit 1; fi
152 tst "$1 1:1 linkfile"
154 echo "If script produced 'out.diff' file, then at least one testcase failed"
155 # These match coreutils 6.8:
164 # Below: with "chown linkdir" coreutils 6.8 will chown linkdir _target_,
165 # we lchown _the link_. I believe we are "more correct".