/* vi: set sw=4 ts=4: */
/*
- * Mini chown/chmod/chgrp implementation for busybox
+ * Mini chown implementation for busybox
*
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Copyright (C) 1999,2000,2001 by Lineo, inc.
- * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config CHOWN
+//config: bool "chown (7.2 kb)"
+//config: default y
+//config: help
+//config: chown is used to change the user and/or group ownership
+//config: of files.
+//config:
+//config:config FEATURE_CHOWN_LONG_OPTIONS
+//config: bool "Enable long options"
+//config: default y
+//config: depends on CHOWN && LONG_OPTS
+
+//applet:IF_CHOWN(APPLET_NOEXEC(chown, chown, BB_DIR_BIN, BB_SUID_DROP, chown))
+
+//kbuild:lib-$(CONFIG_CHOWN) += chown.o
+
+/* BB_AUDIT SUSv3 defects - none? */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include "busybox.h"
+//usage:#define chown_trivial_usage
+//usage: "[-Rh"IF_DESKTOP("LHPcvf")"]... USER[:[GRP]] FILE..."
+//usage:#define chown_full_usage "\n\n"
+//usage: "Change the owner and/or group of each FILE to USER and/or GRP\n"
+//usage: "\n -R Recurse"
+//usage: "\n -h Affect symlinks instead of symlink targets"
+//usage: IF_DESKTOP(
+//usage: "\n -L Traverse all symlinks to directories"
+//usage: "\n -H Traverse symlinks on command line only"
+//usage: "\n -P Don't traverse symlinks (default)"
+//usage: "\n -c List changed files"
+//usage: "\n -v List all files"
+//usage: "\n -f Hide errors"
+//usage: )
+//usage:
+//usage:#define chown_example_usage
+//usage: "$ ls -l /tmp/foo\n"
+//usage: "-r--r--r-- 1 andersen andersen 0 Apr 12 18:25 /tmp/foo\n"
+//usage: "$ chown root /tmp/foo\n"
+//usage: "$ ls -l /tmp/foo\n"
+//usage: "-r--r--r-- 1 root andersen 0 Apr 12 18:25 /tmp/foo\n"
+//usage: "$ chown root.root /tmp/foo\n"
+//usage: "ls -l /tmp/foo\n"
+//usage: "-r--r--r-- 1 root root 0 Apr 12 18:25 /tmp/foo\n"
-/* Don't use lchown for libc5 or glibc older then 2.1.x */
-#if (__GLIBC__ < 2) && (__GLIBC_MINOR__ < 1)
-#define lchown chown
+#include "libbb.h"
+
+/* This is a NOEXEC applet. Be very careful! */
+
+
+#define OPT_STR "Rh" IF_DESKTOP("vcfLHP")
+#define BIT_RECURSE 1
+#define OPT_RECURSE (opt & 1)
+#define OPT_NODEREF (opt & 2)
+#define OPT_VERBOSE (IF_DESKTOP(opt & 0x04) IF_NOT_DESKTOP(0))
+#define OPT_CHANGED (IF_DESKTOP(opt & 0x08) IF_NOT_DESKTOP(0))
+#define OPT_QUIET (IF_DESKTOP(opt & 0x10) IF_NOT_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 (IF_DESKTOP(opt & BIT_TRAVERSE) IF_NOT_DESKTOP(0))
+/* -H or -L */
+#define BIT_TRAVERSE_TOP (0x20|0x40)
+#define OPT_TRAVERSE_TOP (IF_DESKTOP(opt & BIT_TRAVERSE_TOP) IF_NOT_DESKTOP(0))
+
+#if ENABLE_FEATURE_CHOWN_LONG_OPTIONS
+static const char chown_longopts[] ALIGN1 =
+ "recursive\0" No_argument "R"
+ "dereference\0" No_argument "\xff"
+ "no-dereference\0" No_argument "h"
+# if ENABLE_DESKTOP
+ "changes\0" No_argument "c"
+ "silent\0" No_argument "f"
+ "quiet\0" No_argument "f"
+ "verbose\0" No_argument "v"
+# endif
+ ;
#endif
-static long uid = -1;
-static long gid = -1;
+typedef int (*chown_fptr)(const char *, uid_t, gid_t);
-static int fileAction(const char *fileName, struct stat *statbuf, void* junk)
+struct param_t {
+ struct bb_uidgid_t ugid;
+ chown_fptr chown_func;
+};
+
+static int FAST_FUNC fileAction(const char *fileName, struct stat *statbuf,
+ void *vparam, int depth UNUSED_PARAM)
{
- if (lchown(fileName, uid, (gid == -1) ? statbuf->st_gid : gid) == 0) {
- return (TRUE);
+#define param (*(struct param_t*)vparam)
+#define opt option_mask32
+ uid_t u = (param.ugid.uid == (uid_t)-1L) ? statbuf->st_uid : param.ugid.uid;
+ gid_t g = (param.ugid.gid == (gid_t)-1L) ? statbuf->st_gid : param.ugid.gid;
+
+ if (param.chown_func(fileName, u, g) == 0) {
+ 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;
}
- perror(fileName);
- return (FALSE);
+ if (!OPT_QUIET)
+ bb_simple_perror_msg(fileName);
+ return FALSE;
+#undef opt
+#undef param
}
-int chown_main(int argc, char **argv)
+int chown_main(int argc UNUSED_PARAM, char **argv)
{
- int opt;
- int recursiveFlag = FALSE;
- char *groupName=NULL;
- char *p=NULL;
-
- /* do normal option parsing */
- while ((opt = getopt(argc, argv, "R")) > 0) {
- switch (opt) {
- case 'R':
- recursiveFlag = TRUE;
- default:
- show_usage();
- }
- }
+ int retval = EXIT_SUCCESS;
+ int opt, flags;
+ struct param_t param;
- if (argc > optind && argc > 2 && argv[optind]) {
- /* First, check if there is a group name here */
- groupName = strchr(argv[optind], '.');
- if (groupName == NULL)
- groupName = strchr(argv[optind], ':');
- if (groupName) {
- *groupName++ = '\0';
- gid = strtoul(groupName, &p, 10);
- if (groupName == p)
- gid = my_getgrnam(groupName);
- } else {
- gid = -1;
- }
- /* Now check for the username */
- uid = strtoul(argv[optind], &p, 10); /* Is is numeric? */
- if (argv[optind] == p) {
- uid = my_getpwnam(argv[optind]);
- }
- } else {
- error_msg_and_die(too_few_args);
+#if ENABLE_FEATURE_CHOWN_LONG_OPTIONS
+ opt = getopt32long(argv, "^" OPT_STR "\0" "-2", chown_longopts);
+#else
+ opt = getopt32(argv, "^" OPT_STR "\0" "-2");
+#endif
+ argv += optind;
+
+ /* This matches coreutils behavior (almost - see below) */
+ param.chown_func = chown;
+ if (OPT_NODEREF
+ /* || (OPT_RECURSE && !OPT_TRAVERSE_TOP): */
+ IF_DESKTOP( || (opt & (BIT_RECURSE|BIT_TRAVERSE_TOP)) == BIT_RECURSE)
+ ) {
+ param.chown_func = lchown;
}
+ flags = ACTION_DEPTHFIRST; /* match coreutils order */
+ if (OPT_RECURSE)
+ flags |= ACTION_RECURSE;
+ if (OPT_TRAVERSE_TOP)
+ flags |= ACTION_FOLLOWLINKS_L0; /* -H/-L: follow links on depth 0 */
+ if (OPT_TRAVERSE)
+ flags |= ACTION_FOLLOWLINKS; /* follow links if -L */
+
+ parse_chown_usergroup_or_die(¶m.ugid, argv[0]);
+
/* Ok, ready to do the deed now */
- while (optind++ < argc) {
- if (recursive_action (argv[optind], recursiveFlag, FALSE, FALSE,
- fileAction, fileAction, NULL) == FALSE) {
- return EXIT_FAILURE;
+ while (*++argv) {
+ if (!recursive_action(*argv,
+ flags, /* flags */
+ fileAction, /* file action */
+ fileAction, /* dir action */
+ ¶m, /* user data */
+ 0) /* depth */
+ ) {
+ retval = EXIT_FAILURE;
}
}
- return EXIT_SUCCESS;
+ return retval;
}
/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
+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
+ echo "[$1]" >>test1.out
+ echo "[$1]" >>test2.out
+ (cd test1; $t1 $1) >>test1.out 2>&1
+ (cd test2; $t2 $1) >>test2.out 2>&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"
+>test1.out
+>test2.out
+# These match coreutils 6.8:
+tst_for_each "-v"
+tst_for_each "-vR"
+tst_for_each "-vRP"
+tst_for_each "-vRL"
+tst_for_each "-vRH"
+tst_for_each "-vh"
+tst_for_each "-vhR"
+tst_for_each "-vhRP"
+tst_for_each "-vhRL"
+tst_for_each "-vhRH"
+# Fix `name' in coreutils output
+sed 's/`/'"'"'/g' -i test2.out
+# Compare us with coreutils output
+diff -u test1.out test2.out
+
*/