1 /* vi: set sw=4 ts=4: */
3 * Mini cp implementation for busybox
5 * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
6 * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
8 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
10 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
15 //config: bool "cp (9.7 kb)"
18 //config: cp is used to copy files and directories.
20 //config:config FEATURE_CP_LONG_OPTIONS
21 //config: bool "Enable long options"
23 //config: depends on CP && LONG_OPTS
25 //config: Enable long options.
26 //config: Also add support for --parents option.
28 //config:config FEATURE_CP_REFLINK
29 //config: bool "Enable --reflink[=auto]"
31 //config: depends on FEATURE_CP_LONG_OPTIONS
33 //applet:IF_CP(APPLET_NOEXEC(cp, cp, BB_DIR_BIN, BB_SUID_DROP, cp))
34 /* NOEXEC despite cases when it can be a "runner" (cp -r LARGE_DIR NEW_DIR) */
36 //kbuild:lib-$(CONFIG_CP) += cp.o
38 /* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
40 //usage:#define cp_trivial_usage
41 //usage: "[OPTIONS] SOURCE... DEST"
42 //usage:#define cp_full_usage "\n\n"
43 //usage: "Copy SOURCE(s) to DEST\n"
44 //usage: "\n -a Same as -dpR"
46 //usage: "\n -c Preserve security context"
48 //usage: "\n -R,-r Recurse"
49 //usage: "\n -d,-P Preserve symlinks (default if -R)"
50 //usage: "\n -L Follow all symlinks"
51 //usage: "\n -H Follow symlinks on command line"
52 //usage: "\n -p Preserve file attributes if possible"
53 //usage: "\n -f Overwrite"
54 //usage: "\n -i Prompt before overwrite"
55 //usage: "\n -l,-s Create (sym)links"
56 //usage: "\n -T Treat DEST as a normal file"
57 //usage: "\n -u Copy only newer files"
60 #include "libcoreutils/coreutils.h"
62 /* This is a NOEXEC applet. Be very careful! */
64 int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
65 int cp_main(int argc, char **argv)
67 struct stat source_stat;
68 struct stat dest_stat;
76 FILEUTILS_CP_OPTNUM = sizeof(FILEUTILS_CP_OPTSTR)-1,
77 #if ENABLE_FEATURE_CP_LONG_OPTIONS
78 /*OPT_rmdest = FILEUTILS_RMDEST = 1 << FILEUTILS_CP_OPTNUM */
79 OPT_parents = 1 << (FILEUTILS_CP_OPTNUM+1),
80 OPT_reflink = 1 << (FILEUTILS_CP_OPTNUM+2),
84 #if ENABLE_FEATURE_CP_LONG_OPTIONS
85 # if ENABLE_FEATURE_CP_REFLINK
88 flags = getopt32long(argv, "^"
91 // Need at least two arguments
92 // Soft- and hardlinking doesn't mix
93 // -P and -d are the same (-P is POSIX, -d is GNU)
94 // -r and -R are the same
95 // -R (and therefore -r) turns on -d (coreutils does this)
97 "-2:l--s:s--l:Pd:rRd:Rd:apdR",
98 "archive\0" No_argument "a"
99 "force\0" No_argument "f"
100 "interactive\0" No_argument "i"
101 "link\0" No_argument "l"
102 "dereference\0" No_argument "L"
103 "no-dereference\0" No_argument "P"
104 "recursive\0" No_argument "R"
105 "symbolic-link\0" No_argument "s"
106 "no-target-directory\0" No_argument "T"
107 "verbose\0" No_argument "v"
108 "update\0" No_argument "u"
109 "remove-destination\0" No_argument "\xff"
110 "parents\0" No_argument "\xfe"
111 # if ENABLE_FEATURE_CP_REFLINK
112 "reflink\0" Optional_argument "\xfd"
116 # if ENABLE_FEATURE_CP_REFLINK
117 BUILD_BUG_ON((int)OPT_reflink != (int)FILEUTILS_REFLINK);
118 if (flags & FILEUTILS_REFLINK) {
120 flags |= FILEUTILS_REFLINK_ALWAYS;
121 else if (strcmp(reflink, "always") == 0)
122 flags |= FILEUTILS_REFLINK_ALWAYS;
123 else if (strcmp(reflink, "auto") != 0)
128 flags = getopt32(argv, "^"
131 "-2:l--s:s--l:Pd:rRd:Rd:apdR"
134 /* Options of cp from GNU coreutils 6.10:
140 * -P, --no-dereference
141 * -R, -r, --recursive
142 * -s, --symbolic-link
144 * -H follow command-line symbolic links in SOURCE
145 * -d same as --no-dereference --preserve=links
146 * -p same as --preserve=mode,ownership,timestamps
147 * -c same as --preserve=context
149 * copy only when the SOURCE file is newer than the destination
150 * file or when the destination file is missing
151 * --remove-destination
152 * remove each existing destination file before attempting to open
154 * use full source file name under DIRECTORY
155 * -T, --no-target-directory
156 * treat DEST as a normal file
157 * NOT SUPPORTED IN BBOX:
159 * make a backup of each existing destination file
160 * -b like --backup but does not accept an argument
162 * copy contents of special files when recursive
163 * --preserve[=ATTR_LIST]
164 * preserve attributes (default: mode,ownership,timestamps),
165 * if possible additional attributes: security context,links,all
166 * --no-preserve=ATTR_LIST
168 * control creation of sparse files
169 * --strip-trailing-slashes
170 * remove any trailing slashes from each SOURCE argument
171 * -S, --suffix=SUFFIX
172 * override the usual backup suffix
173 * -t, --target-directory=DIRECTORY
174 * copy all SOURCE arguments into DIRECTORY
175 * -x, --one-file-system
176 * stay on this file system
177 * -Z, --context=CONTEXT
178 * (SELinux) set SELinux security context of copy to CONTEXT
182 /* Reverse this bit. If there is -d, bit is not set: */
183 flags ^= FILEUTILS_DEREFERENCE;
184 /* coreutils 6.9 compat:
185 * by default, "cp" derefs symlinks (creates regular dest files),
186 * but "cp -R" does not. We switch off deref if -r or -R (see above).
187 * However, "cp -RL" must still deref symlinks: */
188 if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */
189 flags |= FILEUTILS_DEREFERENCE;
192 if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
197 status = EXIT_SUCCESS;
198 last = argv[argc - 1];
199 /* If there are only two arguments and... */
201 s_flags = cp_mv_stat2(*argv, &source_stat,
202 (flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
205 d_flags = cp_mv_stat(last, &dest_stat);
209 if (flags & FILEUTILS_NO_TARGET_DIR) { /* -T */
210 if (!(s_flags & 2) && (d_flags & 2))
211 /* cp -T NOTDIR DIR */
212 bb_error_msg_and_die("'%s' is a directory", last);
215 #if ENABLE_FEATURE_CP_LONG_OPTIONS
216 //bb_error_msg("flags:%x FILEUTILS_RMDEST:%x OPT_parents:%x",
217 // flags, FILEUTILS_RMDEST, OPT_parents);
218 if (flags & OPT_parents) {
219 if (!(d_flags & 2)) {
220 bb_error_msg_and_die("with --parents, the destination must be a directory");
223 if (flags & FILEUTILS_RMDEST) {
224 flags |= FILEUTILS_FORCE;
228 /* ...if neither is a directory... */
229 if (!((s_flags | d_flags) & 2)
230 /* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */
231 || ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
232 || (flags & FILEUTILS_NO_TARGET_DIR)
234 /* Do a simple copy */
236 goto DO_COPY; /* NB: argc==2 -> *++argv==last */
238 } else if (flags & FILEUTILS_NO_TARGET_DIR) {
239 bb_error_msg_and_die("too many arguments");
243 #if ENABLE_FEATURE_CP_LONG_OPTIONS
244 if (flags & OPT_parents) {
247 dest = concat_path_file(last, *argv);
248 dest_dup = xstrdup(dest);
249 dest_dir = dirname(dest_dup);
250 if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) {
257 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
259 if (copy_file(*argv, dest, flags) < 0) {
260 status = EXIT_FAILURE;
262 if (*++argv == last) {
263 /* possibly leaking dest... */
266 /* don't move up: dest may be == last and not malloced! */
270 /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */