+/* vi: set sw=4 ts=4: */
/*
- * Mini chown/chgrp implementation for busybox
+ * Mini chown implementation for busybox
*
- * Copyright (C) 1998 by Erik Andersen <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
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include <stdio.h>
-#include <grp.h>
-#include <pwd.h>
-#include "internal.h"
+/* BB_AUDIT SUSv3 defects - none? */
+/* BB_AUDIT GNU defects - unsupported long options. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/chown.html */
+#include "busybox.h"
-static int uid=-1;
-static int gid=0;
-static int chownApp;
-static char* invocationName=NULL;
+#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 const char chgrp_usage[] = "[OPTION]... GROUP FILE...\n"
- "Change the group membership of each FILE to GROUP.\n"
- "\n\tOptions:\n" "\t-R\tchange files and directories recursively\n";
-static const char chown_usage[] = "[OPTION]... OWNER[.[GROUP] FILE...\n"
- "Change the owner and/or group of each FILE to OWNER and/or GROUP.\n"
- "\n\tOptions:\n" "\t-R\tchange files and directories recursively\n";
+static struct bb_uidgid_t ugid = { -1, -1 };
-
-
-static int fileAction(const char *fileName)
+static int fileAction(const char *fileName, struct stat *statbuf,
+ void *cf, int depth)
{
- struct stat statBuf;
- if ((stat(fileName, &statBuf) < 0) ||
- (chown(fileName,
- ((chownApp==TRUE)? uid: statBuf.st_uid),
- gid) < 0)) {
- perror(fileName);
- return( FALSE);
- }
- return( TRUE);
+ 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)
{
- struct group *grp;
- struct passwd *pwd;
- int recursiveFlag=FALSE;
- char *groupName;
-
-
- chownApp = (strcmp(*argv, "chown")==0)? TRUE : FALSE;
-
- if (argc < 2) {
- fprintf(stderr, "Usage: %s %s", *argv,
- (chownApp==TRUE)? chown_usage : chgrp_usage);
- exit( FALSE);
- }
- invocationName=*argv;
- argc--;
- argv++;
-
- /* Parse options */
- while (**argv == '-') {
- while (*++(*argv)) switch (**argv) {
- case 'R':
- recursiveFlag = TRUE;
- break;
- default:
- fprintf(stderr, "Unknown option: %c\n", **argv);
- exit( FALSE);
- }
- argc--;
- argv++;
- }
-
- /* Find the selected group */
- groupName = strchr(*argv, '.');
- if ( chownApp==TRUE && groupName )
- *groupName++ = '\0';
- else
- groupName = *argv;
- grp = getgrnam(groupName);
- if (grp == NULL) {
- fprintf(stderr, "%s: Unknown group name: %s\n", invocationName, groupName);
- exit( FALSE);
- }
- gid = grp->gr_gid;
-
- /* Find the selected user (if appropriate) */
- if (chownApp==TRUE) {
- pwd = getpwnam(*argv);
- if (pwd == NULL) {
- fprintf(stderr, "%s: Unknown user name: %s\n", invocationName, *argv);
- exit( FALSE);
+ 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;
}
- uid = pwd->pw_uid;
- }
-
- /* Ok, ready to do the deed now */
- if (argc <= 1) {
- fprintf(stderr, "%s: too few arguments", invocationName);
- exit( FALSE);
- }
- while (argc-- > 1) {
+
+ parse_chown_usergroup_or_die(&ugid, argv[0]);
+
+ /* Ok, ready to do the deed now */
argv++;
- recursiveAction( *argv, recursiveFlag, TRUE, fileAction, fileAction);
- }
- exit(TRUE);
+ 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"
+
+*/
projects / oweals / busybox.git / blobdiff