* Mini cp implementation for busybox
*
* Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
+ * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
*
- * Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-
-/* BB_AUDIT SUSv3 defects - unsupported options -H, -L, and -P. */
-/* BB_AUDIT GNU defects - only extension options supported are -a and -d. */
-/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
-
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Size reduction.
*/
+//config:config CP
+//config: bool "cp (9.7 kb)"
+//config: default y
+//config: help
+//config: cp is used to copy files and directories.
+//config:
+//config:config FEATURE_CP_LONG_OPTIONS
+//config: bool "Enable long options"
+//config: default y
+//config: depends on CP && LONG_OPTS
+//config: help
+//config: Enable long options.
+//config: Also add support for --parents option.
+//config:
+//config:config FEATURE_CP_REFLINK
+//config: bool "Enable --reflink[=auto]"
+//config: default y
+//config: depends on FEATURE_CP_LONG_OPTIONS
+
+//applet:IF_CP(APPLET_NOEXEC(cp, cp, BB_DIR_BIN, BB_SUID_DROP, cp))
+/* NOEXEC despite cases when it can be a "runner" (cp -r LARGE_DIR NEW_DIR) */
+
+//kbuild:lib-$(CONFIG_CP) += cp.o
+
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
+
+//usage:#define cp_trivial_usage
+//usage: "[OPTIONS] SOURCE... DEST"
+//usage:#define cp_full_usage "\n\n"
+//usage: "Copy SOURCE(s) to DEST\n"
+//usage: "\n -a Same as -dpR"
+//usage: IF_SELINUX(
+//usage: "\n -c Preserve security context"
+//usage: )
+//usage: "\n -R,-r Recurse"
+//usage: "\n -d,-P Preserve symlinks (default if -R)"
+//usage: "\n -L Follow all symlinks"
+//usage: "\n -H Follow symlinks on command line"
+//usage: "\n -p Preserve file attributes if possible"
+//usage: "\n -f Overwrite"
+//usage: "\n -i Prompt before overwrite"
+//usage: "\n -l,-s Create (sym)links"
+//usage: "\n -T Treat DEST as a normal file"
+//usage: "\n -u Copy only newer files"
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <utime.h>
-#include <errno.h>
-#include <dirent.h>
-#include <stdlib.h>
-#include <assert.h>
-#include "busybox.h"
+#include "libbb.h"
#include "libcoreutils/coreutils.h"
+/* This is a NOEXEC applet. Be very careful! */
+
+int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int cp_main(int argc, char **argv)
{
struct stat source_stat;
int s_flags;
int d_flags;
int flags;
- int status = 0;
+ int status;
+ enum {
+ FILEUTILS_CP_OPTNUM = sizeof(FILEUTILS_CP_OPTSTR)-1,
+#if ENABLE_FEATURE_CP_LONG_OPTIONS
+ /*OPT_rmdest = FILEUTILS_RMDEST = 1 << FILEUTILS_CP_OPTNUM */
+ OPT_parents = 1 << (FILEUTILS_CP_OPTNUM+1),
+ OPT_reflink = 1 << (FILEUTILS_CP_OPTNUM+2),
+#endif
+ };
- flags = getopt32(argc, argv, "pdRfiarPHL");
-
- if (flags & 32) {
- flags |= (FILEUTILS_PRESERVE_STATUS | FILEUTILS_RECUR | FILEUTILS_DEREFERENCE);
- }
- if (flags & 64) {
- /* Make -r a synonym for -R,
- * -r was marked as obsolete in SUSv3, but is included for compatibility
- */
- flags |= FILEUTILS_RECUR;
+#if ENABLE_FEATURE_CP_LONG_OPTIONS
+# if ENABLE_FEATURE_CP_REFLINK
+ char *reflink = NULL;
+# endif
+ flags = getopt32long(argv, "^"
+ FILEUTILS_CP_OPTSTR
+ "\0"
+ // Need at least two arguments
+ // Soft- and hardlinking doesn't mix
+ // -P and -d are the same (-P is POSIX, -d is GNU)
+ // -r and -R are the same
+ // -R (and therefore -r) turns on -d (coreutils does this)
+ // -a = -pdR
+ "-2:l--s:s--l:Pd:rRd:Rd:apdR",
+ "archive\0" No_argument "a"
+ "force\0" No_argument "f"
+ "interactive\0" No_argument "i"
+ "link\0" No_argument "l"
+ "dereference\0" No_argument "L"
+ "no-dereference\0" No_argument "P"
+ "recursive\0" No_argument "R"
+ "symbolic-link\0" No_argument "s"
+ "no-target-directory\0" No_argument "T"
+ "verbose\0" No_argument "v"
+ "update\0" No_argument "u"
+ "remove-destination\0" No_argument "\xff"
+ "parents\0" No_argument "\xfe"
+# if ENABLE_FEATURE_CP_REFLINK
+ "reflink\0" Optional_argument "\xfd"
+ , &reflink
+# endif
+ );
+# if ENABLE_FEATURE_CP_REFLINK
+ BUILD_BUG_ON((int)OPT_reflink != (int)FILEUTILS_REFLINK);
+ if (flags & FILEUTILS_REFLINK) {
+ if (!reflink)
+ flags |= FILEUTILS_REFLINK_ALWAYS;
+ else if (strcmp(reflink, "always") == 0)
+ flags |= FILEUTILS_REFLINK_ALWAYS;
+ else if (strcmp(reflink, "auto") != 0)
+ bb_show_usage();
}
- if (flags & 128) {
- /* Make -P a synonym for -d,
- * -d is the GNU option while -P is the POSIX 2003 option
- */
+# endif
+#else
+ flags = getopt32(argv, "^"
+ FILEUTILS_CP_OPTSTR
+ "\0"
+ "-2:l--s:s--l:Pd:rRd:Rd:apdR"
+ );
+#endif
+ /* Options of cp from GNU coreutils 6.10:
+ * -a, --archive
+ * -f, --force
+ * -i, --interactive
+ * -l, --link
+ * -L, --dereference
+ * -P, --no-dereference
+ * -R, -r, --recursive
+ * -s, --symbolic-link
+ * -v, --verbose
+ * -H follow command-line symbolic links in SOURCE
+ * -d same as --no-dereference --preserve=links
+ * -p same as --preserve=mode,ownership,timestamps
+ * -c same as --preserve=context
+ * -u, --update
+ * copy only when the SOURCE file is newer than the destination
+ * file or when the destination file is missing
+ * --remove-destination
+ * remove each existing destination file before attempting to open
+ * --parents
+ * use full source file name under DIRECTORY
+ * -T, --no-target-directory
+ * treat DEST as a normal file
+ * NOT SUPPORTED IN BBOX:
+ * --backup[=CONTROL]
+ * make a backup of each existing destination file
+ * -b like --backup but does not accept an argument
+ * --copy-contents
+ * copy contents of special files when recursive
+ * --preserve[=ATTR_LIST]
+ * preserve attributes (default: mode,ownership,timestamps),
+ * if possible additional attributes: security context,links,all
+ * --no-preserve=ATTR_LIST
+ * --sparse=WHEN
+ * control creation of sparse files
+ * --strip-trailing-slashes
+ * remove any trailing slashes from each SOURCE argument
+ * -S, --suffix=SUFFIX
+ * override the usual backup suffix
+ * -t, --target-directory=DIRECTORY
+ * copy all SOURCE arguments into DIRECTORY
+ * -x, --one-file-system
+ * stay on this file system
+ * -Z, --context=CONTEXT
+ * (SELinux) set SELinux security context of copy to CONTEXT
+ */
+ argc -= optind;
+ argv += optind;
+ /* Reverse this bit. If there is -d, bit is not set: */
+ flags ^= FILEUTILS_DEREFERENCE;
+ /* coreutils 6.9 compat:
+ * by default, "cp" derefs symlinks (creates regular dest files),
+ * but "cp -R" does not. We switch off deref if -r or -R (see above).
+ * However, "cp -RL" must still deref symlinks: */
+ if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */
flags |= FILEUTILS_DEREFERENCE;
- }
- /* Default behavior of cp is to dereference, so we don't have to do
- * anything special when we are given -L.
- * The behavior of -H is *almost* like -L, but not quite, so let's
- * just ignore it too for fun.
- if (flags & 256 || flags & 512) {
- ;
- }
- */
-
- flags ^= FILEUTILS_DEREFERENCE; /* The sense of this flag was reversed. */
- if (optind + 2 > argc) {
- bb_show_usage();
+#if ENABLE_SELINUX
+ if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
+ selinux_or_die();
}
+#endif
+ status = EXIT_SUCCESS;
last = argv[argc - 1];
- argv += optind;
-
/* If there are only two arguments and... */
- if (optind + 2 == argc) {
+ if (argc == 2) {
s_flags = cp_mv_stat2(*argv, &source_stat,
- (flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
- if ((s_flags < 0) || ((d_flags = cp_mv_stat(last, &dest_stat)) < 0)) {
- exit(EXIT_FAILURE);
+ (flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
+ if (s_flags < 0)
+ return EXIT_FAILURE;
+ d_flags = cp_mv_stat(last, &dest_stat);
+ if (d_flags < 0)
+ return EXIT_FAILURE;
+
+ if (flags & FILEUTILS_NO_TARGET_DIR) { /* -T */
+ if (!(s_flags & 2) && (d_flags & 2))
+ /* cp -T NOTDIR DIR */
+ bb_error_msg_and_die("'%s' is a directory", last);
}
- /* ...if neither is a directory or... */
- if ( !((s_flags | d_flags) & 2) ||
- /* ...recursing, the 1st is a directory, and the 2nd doesn't exist... */
- /* ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags) */
- /* Simplify the above since FILEUTILS_RECUR >> 1 == 2. */
- ((((flags & FILEUTILS_RECUR) >> 1) & s_flags) && !d_flags)
+
+#if ENABLE_FEATURE_CP_LONG_OPTIONS
+ //bb_error_msg("flags:%x FILEUTILS_RMDEST:%x OPT_parents:%x",
+ // flags, FILEUTILS_RMDEST, OPT_parents);
+ if (flags & OPT_parents) {
+ if (!(d_flags & 2)) {
+ bb_error_msg_and_die("with --parents, the destination must be a directory");
+ }
+ }
+ if (flags & FILEUTILS_RMDEST) {
+ flags |= FILEUTILS_FORCE;
+ }
+#endif
+
+ /* ...if neither is a directory... */
+ if (!((s_flags | d_flags) & 2)
+ /* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */
+ || ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
+ || (flags & FILEUTILS_NO_TARGET_DIR)
) {
- /* ...do a simple copy. */
+ /* Do a simple copy */
dest = last;
- goto DO_COPY; /* Note: optind+2==argc implies argv[1]==last below. */
+ goto DO_COPY; /* NB: argc==2 -> *++argv==last */
}
+ } else if (flags & FILEUTILS_NO_TARGET_DIR) {
+ bb_error_msg_and_die("too many arguments");
}
- do {
- dest = concat_path_file(last, bb_get_last_path_component(*argv));
- DO_COPY:
+ while (1) {
+#if ENABLE_FEATURE_CP_LONG_OPTIONS
+ if (flags & OPT_parents) {
+ char *dest_dup;
+ char *dest_dir;
+ dest = concat_path_file(last, *argv);
+ dest_dup = xstrdup(dest);
+ dest_dir = dirname(dest_dup);
+ if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) {
+ return EXIT_FAILURE;
+ }
+ free(dest_dup);
+ goto DO_COPY;
+ }
+#endif
+ dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
+ DO_COPY:
if (copy_file(*argv, dest, flags) < 0) {
- status = 1;
+ status = EXIT_FAILURE;
}
if (*++argv == last) {
+ /* possibly leaking dest... */
break;
}
- free((void *) dest);
- } while (1);
+ /* don't move up: dest may be == last and not malloced! */
+ free((void*)dest);
+ }
- exit(status);
+ /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */
+ return status;
}
projects / oweals / busybox.git / blobdiff