| /* vi: set sw=4 ts=4: */ |
| /* |
| * 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 GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| |
| /* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */ |
| |
| /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) |
| * |
| * Size reduction. |
| */ |
| |
| #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; |
| struct stat dest_stat; |
| const char *last; |
| const char *dest; |
| int s_flags; |
| int d_flags; |
| int flags; |
| int status; |
| 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_v = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2), |
| #if ENABLE_FEATURE_CP_LONG_OPTIONS |
| OPT_parents = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+3), |
| #endif |
| }; |
| |
| // 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"; |
| #if ENABLE_FEATURE_CP_LONG_OPTIONS |
| applet_long_options = |
| "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" |
| "verbose\0" No_argument "v" |
| "parents\0" No_argument "\xff" |
| ; |
| #endif |
| // -v (--verbose) is ignored |
| flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPv"); |
| /* 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 |
| * --parents |
| * use full source file name under DIRECTORY |
| * 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 |
| * --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; |
| /* 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; |
| |
| #if ENABLE_SELINUX |
| if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) { |
| selinux_or_die(); |
| } |
| #endif |
| |
| status = EXIT_SUCCESS; |
| 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 ENABLE_FEATURE_CP_LONG_OPTIONS |
| if (flags & OPT_parents) { |
| if (!(d_flags & 2)) { |
| bb_error_msg_and_die("with --parents, the destination must be a directory"); |
| } |
| } |
| #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) |
| ) { |
| /* Do a simple copy */ |
| dest = last; |
| goto DO_COPY; /* NB: argc==2 -> *++argv==last */ |
| } |
| } |
| |
| 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 = EXIT_FAILURE; |
| } |
| if (*++argv == last) { |
| /* possibly leaking dest... */ |
| break; |
| } |
| /* don't move up: dest may be == last and not malloced! */ |
| free((void*)dest); |
| } |
| |
| /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */ |
| return status; |
| } |