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/* vi: set sw=4 ts=4: */
/*
* Mini chown implementation for busybox
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
/* BB_AUDIT SUSv3 defects - none? */
/* BB_AUDIT GNU defects - unsupported long options. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
#include "libbb.h"
/* This is a NOEXEC applet. Be very careful! */
#define OPT_STR ("Rh" USE_DESKTOP("vcfLHP"))
#define BIT_RECURSE 1
#define OPT_RECURSE (option_mask32 & 1)
#define OPT_NODEREF (option_mask32 & 2)
#define OPT_VERBOSE (USE_DESKTOP(option_mask32 & 0x04) SKIP_DESKTOP(0))
#define OPT_CHANGED (USE_DESKTOP(option_mask32 & 0x08) SKIP_DESKTOP(0))
#define OPT_QUIET (USE_DESKTOP(option_mask32 & 0x10) SKIP_DESKTOP(0))
/* POSIX options
* -L traverse every symbolic link to a directory encountered
* -H if a command line argument is a symbolic link to a directory, traverse it
* -P do not traverse any symbolic links (default)
* We do not conform to the following:
* "Specifying more than one of -H, -L, and -P is not an error.
* The last option specified shall determine the behavior of the utility." */
/* -L */
#define BIT_TRAVERSE 0x20
#define OPT_TRAVERSE (USE_DESKTOP(option_mask32 & BIT_TRAVERSE) SKIP_DESKTOP(0))
/* -H or -L */
#define BIT_TRAVERSE_TOP (0x20|0x40)
#define OPT_TRAVERSE_TOP (USE_DESKTOP(option_mask32 & BIT_TRAVERSE_TOP) SKIP_DESKTOP(0))
typedef int (*chown_fptr)(const char *, uid_t, gid_t);
static struct bb_uidgid_t ugid = { -1, -1 };
static int fileAction(const char *fileName, struct stat *statbuf,
void *cf, int depth)
{
uid_t u = (ugid.uid == (uid_t)-1) ? statbuf->st_uid : ugid.uid;
gid_t g = (ugid.gid == (gid_t)-1) ? statbuf->st_gid : ugid.gid;
if (!((chown_fptr)cf)(fileName, u, g)) {
if (OPT_VERBOSE
|| (OPT_CHANGED && (statbuf->st_uid != u || statbuf->st_gid != g))
) {
printf("changed ownership of '%s' to %u:%u\n",
fileName, (unsigned)u, (unsigned)g);
}
return TRUE;
}
if (!OPT_QUIET)
bb_perror_msg("%s", fileName); /* A filename can have % in it... */
return FALSE;
}
int chown_main(int argc, char **argv);
int chown_main(int argc, char **argv)
{
int retval = EXIT_SUCCESS;
chown_fptr chown_func;
opt_complementary = "-2";
getopt32(argc, argv, OPT_STR);
argv += optind;
/* This matches coreutils behavior (almost - see below) */
chown_func = chown;
if (OPT_NODEREF
/* || (OPT_RECURSE && !OPT_TRAVERSE_TOP): */
USE_DESKTOP( || (option_mask32 & (BIT_RECURSE|BIT_TRAVERSE_TOP)) == BIT_RECURSE)
) {
chown_func = lchown;
}
parse_chown_usergroup_or_die(&ugid, argv[0]);
/* Ok, ready to do the deed now */
argv++;
do {
char *arg = *argv;
if (OPT_TRAVERSE_TOP) {
/* resolves symlink (even recursive) */
arg = xmalloc_realpath(arg);
if (!arg)
continue;
}
if (!recursive_action(arg,
(OPT_RECURSE ? ACTION_RECURSE : 0) | /* recurse */
(OPT_TRAVERSE ? ACTION_FOLLOWLINKS : 0),/* follow links if -L */
fileAction, /* file action */
fileAction, /* dir action */
chown_func, /* user data */
0) /* depth */
) {
retval = EXIT_FAILURE;
}
if (OPT_TRAVERSE_TOP)
free(arg);
} while (*++argv);
return retval;
}
/*
Testcase. Run in empty directory.
#!/bin/sh
t1="/tmp/busybox chown"
t2="/usr/bin/chown"
create() {
rm -rf $1; mkdir $1
(
cd $1 || exit 1
mkdir dir dir2
>up
>file
>dir/file
>dir2/file
ln -s dir linkdir
ln -s file linkfile
ln -s ../up dir/linkup
ln -s ../dir2 dir/linkupdir2
)
chown -R 0:0 $1
}
tst() {
create test1
create test2
(cd test1; $t1 $1)
(cd test2; $t2 $1)
(cd test1; ls -lnR) >out1
(cd test2; ls -lnR) >out2
echo "chown $1" >out.diff
if ! diff -u out1 out2 >>out.diff; then exit 1; fi
rm out.diff
}
tst_for_each() {
tst "$1 1:1 file"
tst "$1 1:1 dir"
tst "$1 1:1 linkdir"
tst "$1 1:1 linkfile"
}
echo "If script produced 'out.diff' file, then at least one testcase failed"
# These match coreutils 6.8:
tst_for_each ""
tst_for_each "-R"
tst_for_each "-RP"
tst_for_each "-RL"
tst_for_each "-RH"
tst_for_each "-h"
tst_for_each "-hR"
tst_for_each "-hRP"
# Below: with "chown linkdir" coreutils 6.8 will chown linkdir _target_,
# we lchown _the link_. I believe we are "more correct".
#tst_for_each "-hRL"
#tst_for_each "-hRH"
*/
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