/*
* Mini cp implementation for busybox
*
- *
* Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
+ * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
*
- * 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 GPL v2 or later, see file LICENSE in this tarball for details.
+ */
+
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
+
+/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
+ * Size reduction.
*/
-#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 "libbb.h"
+#include "libcoreutils/coreutils.h"
-#include "busybox.h"
+/* This is a NOEXEC applet. Be very careful! */
-extern int cp_main(int argc, char **argv)
+
+int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int cp_main(int argc, char **argv)
{
+ struct stat source_stat;
+ struct stat dest_stat;
+ const char *last;
+ const char *dest;
+ int s_flags;
+ int d_flags;
+ int flags;
int status = 0;
- int opt;
- int flags = FILEUTILS_DEREFERENCE;
- int i;
+ enum {
+ OPT_a = 1 << (sizeof(FILEUTILS_CP_OPTSTR)-1),
+ OPT_r = 1 << (sizeof(FILEUTILS_CP_OPTSTR)),
+ OPT_P = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+1),
+ OPT_H = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2),
+ };
- while ((opt = getopt(argc, argv, "adfipR")) != -1)
- switch (opt) {
- case 'a':
- flags |= FILEUTILS_PRESERVE_STATUS | FILEUTILS_RECUR;
- /* fallthrough */
- case 'd':
- flags &= ~FILEUTILS_DEREFERENCE;
- break;
- case 'f':
- flags |= FILEUTILS_FORCE;
- break;
- case 'i':
- flags |= FILEUTILS_INTERACTIVE;
- break;
- case 'p':
- flags |= FILEUTILS_PRESERVE_STATUS;
- break;
- case 'R':
- flags |= FILEUTILS_RECUR;
- break;
- default:
- show_usage();
- }
-
- if (optind + 2 > argc)
- show_usage();
+ // 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
+ opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR:HL";
+ // -v (--verbose) is ignored
+ flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPHv");
+ /* 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
+ * NOT SUPPORTED IN BBOX:
+ * long options are not supported (even those above).
+ * --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
+ * --parents
+ * use full source file name under DIRECTORY
+ * --remove-destination
+ * remove each existing destination file before attempting to open
+ * --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
+ * -T, --no-target-directory
+ * treat DEST as a normal file
+ * -u, --update
+ * copy only when the SOURCE file is newer than the destination
+ * file or when the destination file is missing
+ * -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;
+ flags ^= FILEUTILS_DEREFERENCE; /* the sense of this flag was reversed */
+ /* 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;
+ /* The behavior of -H is *almost* like -L, but not quite, so let's
+ * just ignore it too for fun. TODO.
+ if (flags & OPT_H) ... // deref command-line params only
+ */
- /* If there are only two arguments and... */
- if (optind + 2 == argc) {
- struct stat source_stat;
- struct stat dest_stat;
- int source_exists = 1;
- int dest_exists = 1;
+#if ENABLE_SELINUX
+ if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
+ selinux_or_die();
+ }
+#endif
- if ((!(flags & FILEUTILS_DEREFERENCE) &&
- lstat(argv[optind], &source_stat) < 0) ||
- ((flags & FILEUTILS_DEREFERENCE) &&
- stat(argv[optind], &source_stat))) {
- if (errno != ENOENT)
- perror_msg_and_die("unable to stat `%s'", argv[optind]);
- source_exists = 0;
- }
+ last = argv[argc - 1];
+ /* If there are only two arguments and... */
+ if (argc == 2) {
+ s_flags = cp_mv_stat2(*argv, &source_stat,
+ (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 (stat(argv[optind + 1], &dest_stat) < 0) {
- if (errno != ENOENT)
- perror_msg_and_die("unable to stat `%s'", argv[optind + 1]);
- dest_exists = 0;
- }
-
/* ...if neither is a directory or... */
- if (((!source_exists || !S_ISDIR(source_stat.st_mode)) &&
- (!dest_exists || !S_ISDIR(dest_stat.st_mode))) ||
- /* ...recursing, the first is a directory, and the
- * second doesn't exist, then... */
- ((flags & FILEUTILS_RECUR) && S_ISDIR(source_stat.st_mode) &&
- !dest_exists)) {
+ 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)
+ ) {
/* ...do a simple copy. */
- if (copy_file(argv[optind], argv[optind + 1], flags) < 0)
- status = 1;
- return status;
+ dest = last;
+ goto DO_COPY; /* NB: argc==2 -> *++argv==last */
}
}
- for (i = optind; i < argc - 1; i++) {
- char *dest = concat_path_file(argv[argc - 1],
- get_last_path_component(argv[i]));
- if (copy_file(argv[i], dest, flags) < 0)
+ while (1) {
+ dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
+ DO_COPY:
+ if (copy_file(*argv, dest, flags) < 0) {
status = 1;
- free(dest);
+ }
+ if (*++argv == last) {
+ /* possibly leaking dest... */
+ break;
+ }
+ free((void*)dest);
}
+ /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */
return status;
}
projects / oweals / busybox.git / blobdiff