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 //applet:IF_CP(APPLET_NOEXEC(cp, cp, BB_DIR_BIN, BB_SUID_DROP, cp))
29 /* NOEXEC despite cases when it can be a "runner" (cp -r LARGE_DIR NEW_DIR) */
31 //kbuild:lib-$(CONFIG_CP) += cp.o
33 /* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
35 //usage:#define cp_trivial_usage
36 //usage: "[OPTIONS] SOURCE... DEST"
37 //usage:#define cp_full_usage "\n\n"
38 //usage: "Copy SOURCE(s) to DEST\n"
39 //usage: "\n -a Same as -dpR"
41 //usage: "\n -c Preserve security context"
43 //usage: "\n -R,-r Recurse"
44 //usage: "\n -d,-P Preserve symlinks (default if -R)"
45 //usage: "\n -L Follow all symlinks"
46 //usage: "\n -H Follow symlinks on command line"
47 //usage: "\n -p Preserve file attributes if possible"
48 //usage: "\n -f Overwrite"
49 //usage: "\n -i Prompt before overwrite"
50 //usage: "\n -l,-s Create (sym)links"
51 //usage: "\n -T Treat DEST as a normal file"
52 //usage: "\n -u Copy only newer files"
55 #include "libcoreutils/coreutils.h"
57 /* This is a NOEXEC applet. Be very careful! */
59 int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
60 int cp_main(int argc, char **argv)
62 struct stat source_stat;
63 struct stat dest_stat;
71 FILEUTILS_CP_OPTNUM = sizeof(FILEUTILS_CP_OPTSTR)-1,
72 #if ENABLE_FEATURE_CP_LONG_OPTIONS
73 /*OPT_rmdest = FILEUTILS_RMDEST = 1 << FILEUTILS_CP_OPTNUM */
74 OPT_parents = 1 << (FILEUTILS_CP_OPTNUM+1),
78 #if ENABLE_FEATURE_CP_LONG_OPTIONS
79 flags = getopt32long(argv, "^"
82 // Need at least two arguments
83 // Soft- and hardlinking doesn't mix
84 // -P and -d are the same (-P is POSIX, -d is GNU)
85 // -r and -R are the same
86 // -R (and therefore -r) turns on -d (coreutils does this)
88 "-2:l--s:s--l:Pd:rRd:Rd:apdR",
89 "archive\0" No_argument "a"
90 "force\0" No_argument "f"
91 "interactive\0" No_argument "i"
92 "link\0" No_argument "l"
93 "dereference\0" No_argument "L"
94 "no-dereference\0" No_argument "P"
95 "recursive\0" No_argument "R"
96 "symbolic-link\0" No_argument "s"
97 "no-target-directory\0" No_argument "T"
98 "verbose\0" No_argument "v"
99 "update\0" No_argument "u"
100 "remove-destination\0" No_argument "\xff"
101 "parents\0" No_argument "\xfe"
104 flags = getopt32(argv, FILEUTILS_CP_OPTSTR);
106 /* Options of cp from GNU coreutils 6.10:
112 * -P, --no-dereference
113 * -R, -r, --recursive
114 * -s, --symbolic-link
116 * -H follow command-line symbolic links in SOURCE
117 * -d same as --no-dereference --preserve=links
118 * -p same as --preserve=mode,ownership,timestamps
119 * -c same as --preserve=context
121 * copy only when the SOURCE file is newer than the destination
122 * file or when the destination file is missing
123 * --remove-destination
124 * remove each existing destination file before attempting to open
126 * use full source file name under DIRECTORY
127 * -T, --no-target-directory
128 * treat DEST as a normal file
129 * NOT SUPPORTED IN BBOX:
131 * make a backup of each existing destination file
132 * -b like --backup but does not accept an argument
134 * copy contents of special files when recursive
135 * --preserve[=ATTR_LIST]
136 * preserve attributes (default: mode,ownership,timestamps),
137 * if possible additional attributes: security context,links,all
138 * --no-preserve=ATTR_LIST
140 * control creation of sparse files
141 * --strip-trailing-slashes
142 * remove any trailing slashes from each SOURCE argument
143 * -S, --suffix=SUFFIX
144 * override the usual backup suffix
145 * -t, --target-directory=DIRECTORY
146 * copy all SOURCE arguments into DIRECTORY
147 * -x, --one-file-system
148 * stay on this file system
149 * -Z, --context=CONTEXT
150 * (SELinux) set SELinux security context of copy to CONTEXT
154 /* Reverse this bit. If there is -d, bit is not set: */
155 flags ^= FILEUTILS_DEREFERENCE;
156 /* coreutils 6.9 compat:
157 * by default, "cp" derefs symlinks (creates regular dest files),
158 * but "cp -R" does not. We switch off deref if -r or -R (see above).
159 * However, "cp -RL" must still deref symlinks: */
160 if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */
161 flags |= FILEUTILS_DEREFERENCE;
164 if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
169 status = EXIT_SUCCESS;
170 last = argv[argc - 1];
171 /* If there are only two arguments and... */
173 s_flags = cp_mv_stat2(*argv, &source_stat,
174 (flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
177 d_flags = cp_mv_stat(last, &dest_stat);
181 if (flags & FILEUTILS_NO_TARGET_DIR) { /* -T */
182 if (!(s_flags & 2) && (d_flags & 2))
183 /* cp -T NOTDIR DIR */
184 bb_error_msg_and_die("'%s' is a directory", last);
187 #if ENABLE_FEATURE_CP_LONG_OPTIONS
188 //bb_error_msg("flags:%x FILEUTILS_RMDEST:%x OPT_parents:%x",
189 // flags, FILEUTILS_RMDEST, OPT_parents);
190 if (flags & OPT_parents) {
191 if (!(d_flags & 2)) {
192 bb_error_msg_and_die("with --parents, the destination must be a directory");
195 if (flags & FILEUTILS_RMDEST) {
196 flags |= FILEUTILS_FORCE;
200 /* ...if neither is a directory... */
201 if (!((s_flags | d_flags) & 2)
202 /* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */
203 || ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
204 || (flags & FILEUTILS_NO_TARGET_DIR)
206 /* Do a simple copy */
208 goto DO_COPY; /* NB: argc==2 -> *++argv==last */
210 } else if (flags & FILEUTILS_NO_TARGET_DIR) {
211 bb_error_msg_and_die("too many arguments");
215 #if ENABLE_FEATURE_CP_LONG_OPTIONS
216 if (flags & OPT_parents) {
219 dest = concat_path_file(last, *argv);
220 dest_dup = xstrdup(dest);
221 dest_dir = dirname(dest_dup);
222 if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) {
229 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
231 if (copy_file(*argv, dest, flags) < 0) {
232 status = EXIT_FAILURE;
234 if (*++argv == last) {
235 /* possibly leaking dest... */
238 /* don't move up: dest may be == last and not malloced! */
242 /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */