* Reworked by (C) 2002 Vladimir Oleynik <dzo@simtreas.ru>
* to correctly parse '-rwxgoa'
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config CHMOD
+//config: bool "chmod (5.5 kb)"
+//config: default y
+//config: help
+//config: chmod is used to change the access permission of files.
+
+//applet:IF_CHMOD(APPLET_NOEXEC(chmod, chmod, BB_DIR_BIN, BB_SUID_DROP, chmod))
+
+//kbuild:lib-$(CONFIG_CHMOD) += chmod.o
/* BB_AUDIT SUSv3 compliant */
/* BB_AUDIT GNU defects - unsupported long options. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/chmod.html */
-#include "busybox.h"
+//usage:#define chmod_trivial_usage
+//usage: "[-R"IF_DESKTOP("cvf")"] MODE[,MODE]... FILE..."
+//usage:#define chmod_full_usage "\n\n"
+//usage: "Each MODE is one or more of the letters ugoa, one of the\n"
+//usage: "symbols +-= and one or more of the letters rwxst\n"
+//usage: "\n -R Recurse"
+//usage: IF_DESKTOP(
+//usage: "\n -c List changed files"
+//usage: "\n -v List all files"
+//usage: "\n -f Hide errors"
+//usage: )
+//usage:
+//usage:#define chmod_example_usage
+//usage: "$ ls -l /tmp/foo\n"
+//usage: "-rw-rw-r-- 1 root root 0 Apr 12 18:25 /tmp/foo\n"
+//usage: "$ chmod u+x /tmp/foo\n"
+//usage: "$ ls -l /tmp/foo\n"
+//usage: "-rwxrw-r-- 1 root root 0 Apr 12 18:25 /tmp/foo*\n"
+//usage: "$ chmod 444 /tmp/foo\n"
+//usage: "$ ls -l /tmp/foo\n"
+//usage: "-r--r--r-- 1 root root 0 Apr 12 18:25 /tmp/foo\n"
+
+#include "libbb.h"
+
+/* This is a NOEXEC applet. Be very careful! */
+
#define OPT_RECURSE (option_mask32 & 1)
-#define OPT_VERBOSE (USE_DESKTOP(option_mask32 & 2) SKIP_DESKTOP(0))
-#define OPT_CHANGED (USE_DESKTOP(option_mask32 & 4) SKIP_DESKTOP(0))
-#define OPT_QUIET (USE_DESKTOP(option_mask32 & 8) SKIP_DESKTOP(0))
-#define OPT_STR "R" USE_DESKTOP("vcf")
+#define OPT_VERBOSE (IF_DESKTOP(option_mask32 & 2) IF_NOT_DESKTOP(0))
+#define OPT_CHANGED (IF_DESKTOP(option_mask32 & 4) IF_NOT_DESKTOP(0))
+#define OPT_QUIET (IF_DESKTOP(option_mask32 & 8) IF_NOT_DESKTOP(0))
+#define OPT_STR "R" IF_DESKTOP("vcf")
/* coreutils:
* chmod never changes the permissions of symbolic links; the chmod
* symbolic links encountered during recursive directory traversals.
*/
-static int fileAction(const char *fileName, struct stat *statbuf, void* junk, int depth)
+static int FAST_FUNC fileAction(const char *fileName, struct stat *statbuf, void* param, int depth)
{
mode_t newmode;
if (S_ISLNK(statbuf->st_mode))
return TRUE;
}
- newmode = statbuf->st_mode;
- if (!bb_parse_mode((char *)junk, &newmode))
- bb_error_msg_and_die("invalid mode: %s", (char *)junk);
+ newmode = bb_parse_mode((char *)param, statbuf->st_mode);
+ if (newmode == (mode_t)-1)
+ bb_error_msg_and_die("invalid mode '%s'", (char *)param);
if (chmod(fileName, newmode) == 0) {
if (OPT_VERBOSE
}
err:
if (!OPT_QUIET)
- bb_perror_msg("%s", fileName);
+ bb_simple_perror_msg(fileName);
return FALSE;
}
-int chmod_main(int argc, char **argv)
+int chmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int chmod_main(int argc UNUSED_PARAM, char **argv)
{
int retval = EXIT_SUCCESS;
char *arg, **argp;
}
}
- /* Paerse options */
- opt_complementary = "-2";
- getopt32(argc, argv, ("-"OPT_STR) + 1); /* Reuse string */
+ /* Parse options */
+ getopt32(argv, "^" OPT_STR "\0" "-2");
argv += optind;
/* Restore option-like mode if needed */
smode = *argv++;
do {
if (!recursive_action(*argv,
- OPT_RECURSE, // recurse
- FALSE, // follow links: GNU doesn't
- FALSE, // depth first
- fileAction, // file action
- fileAction, // dir action
- smode, // user data
- 0) // depth
+ OPT_RECURSE, // recurse
+ fileAction, // file action
+ fileAction, // dir action
+ smode, // user data
+ 0) // depth
) {
retval = EXIT_FAILURE;
}
/*
Security: chmod is too important and too subtle.
This is a test script (busybox chmod versus coreutils).
-Run it in empty dir. Probably requires bash.
+Run it in empty directory.
#!/bin/sh
-function create() {
+t1="/tmp/busybox chmod"
+t2="/usr/bin/chmod"
+create() {
rm -rf $1; mkdir $1
(
cd $1 || exit 1
ln -s ../up dir/up
)
}
-function tst() {
+tst() {
(cd test1; $t1 $1)
(cd test2; $t2 $1)
(cd test1; ls -lR) >out1
(cd test2; ls -lR) >out2
echo "chmod $1" >out.diff
if ! diff -u out1 out2 >>out.diff; then exit 1; fi
- mv out.diff out1.diff
+ rm out.diff
}
-t1="/tmp/busybox chmod"
-t2="/usr/bin/chmod"
+echo "If script produced 'out.diff' file, then at least one testcase failed"
create test1; create test2
tst "a+w file"
tst "a-w dir"