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))
30 //kbuild:lib-$(CONFIG_CP) += cp.o
32 /* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
34 //usage:#define cp_trivial_usage
35 //usage: "[OPTIONS] SOURCE... DEST"
36 //usage:#define cp_full_usage "\n\n"
37 //usage: "Copy SOURCE(s) to DEST\n"
38 //usage: "\n -a Same as -dpR"
40 //usage: "\n -c Preserve security context"
42 //usage: "\n -R,-r Recurse"
43 //usage: "\n -d,-P Preserve symlinks (default if -R)"
44 //usage: "\n -L Follow all symlinks"
45 //usage: "\n -H Follow symlinks on command line"
46 //usage: "\n -p Preserve file attributes if possible"
47 //usage: "\n -f Overwrite"
48 //usage: "\n -i Prompt before overwrite"
49 //usage: "\n -l,-s Create (sym)links"
50 //usage: "\n -u Copy only newer files"
53 #include "libcoreutils/coreutils.h"
55 /* This is a NOEXEC applet. Be very careful! */
57 int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
58 int cp_main(int argc, char **argv)
60 struct stat source_stat;
61 struct stat dest_stat;
69 FILEUTILS_CP_OPTNUM = sizeof(FILEUTILS_CP_OPTSTR)-1,
70 #if ENABLE_FEATURE_CP_LONG_OPTIONS
71 /*OPT_rmdest = FILEUTILS_RMDEST = 1 << FILEUTILS_CP_OPTNUM */
72 OPT_parents = 1 << (FILEUTILS_CP_OPTNUM+1),
76 // Need at least two arguments
77 // Soft- and hardlinking doesn't mix
78 // -P and -d are the same (-P is POSIX, -d is GNU)
79 // -r and -R are the same
80 // -R (and therefore -r) turns on -d (coreutils does this)
82 opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR";
83 #if ENABLE_FEATURE_CP_LONG_OPTIONS
84 flags = getopt32long(argv, FILEUTILS_CP_OPTSTR,
85 "archive\0" No_argument "a"
86 "force\0" No_argument "f"
87 "interactive\0" No_argument "i"
88 "link\0" No_argument "l"
89 "dereference\0" No_argument "L"
90 "no-dereference\0" No_argument "P"
91 "recursive\0" No_argument "R"
92 "symbolic-link\0" No_argument "s"
93 "verbose\0" No_argument "v"
94 "update\0" No_argument "u"
95 "remove-destination\0" No_argument "\xff"
96 "parents\0" No_argument "\xfe"
99 flags = getopt32(argv, FILEUTILS_CP_OPTSTR);
101 /* Options of cp from GNU coreutils 6.10:
107 * -P, --no-dereference
108 * -R, -r, --recursive
109 * -s, --symbolic-link
111 * -H follow command-line symbolic links in SOURCE
112 * -d same as --no-dereference --preserve=links
113 * -p same as --preserve=mode,ownership,timestamps
114 * -c same as --preserve=context
116 * copy only when the SOURCE file is newer than the destination
117 * file or when the destination file is missing
118 * --remove-destination
119 * remove each existing destination file before attempting to open
121 * use full source file name under DIRECTORY
122 * NOT SUPPORTED IN BBOX:
124 * make a backup of each existing destination file
125 * -b like --backup but does not accept an argument
127 * copy contents of special files when recursive
128 * --preserve[=ATTR_LIST]
129 * preserve attributes (default: mode,ownership,timestamps),
130 * if possible additional attributes: security context,links,all
131 * --no-preserve=ATTR_LIST
133 * control creation of sparse files
134 * --strip-trailing-slashes
135 * remove any trailing slashes from each SOURCE argument
136 * -S, --suffix=SUFFIX
137 * override the usual backup suffix
138 * -t, --target-directory=DIRECTORY
139 * copy all SOURCE arguments into DIRECTORY
140 * -T, --no-target-directory
141 * treat DEST as a normal file
142 * -x, --one-file-system
143 * stay on this file system
144 * -Z, --context=CONTEXT
145 * (SELinux) set SELinux security context of copy to CONTEXT
149 /* Reverse this bit. If there is -d, bit is not set: */
150 flags ^= FILEUTILS_DEREFERENCE;
151 /* coreutils 6.9 compat:
152 * by default, "cp" derefs symlinks (creates regular dest files),
153 * but "cp -R" does not. We switch off deref if -r or -R (see above).
154 * However, "cp -RL" must still deref symlinks: */
155 if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */
156 flags |= FILEUTILS_DEREFERENCE;
159 if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
164 status = EXIT_SUCCESS;
165 last = argv[argc - 1];
166 /* If there are only two arguments and... */
168 s_flags = cp_mv_stat2(*argv, &source_stat,
169 (flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
172 d_flags = cp_mv_stat(last, &dest_stat);
176 #if ENABLE_FEATURE_CP_LONG_OPTIONS
177 //bb_error_msg("flags:%x FILEUTILS_RMDEST:%x OPT_parents:%x",
178 // flags, FILEUTILS_RMDEST, OPT_parents);
179 if (flags & OPT_parents) {
180 if (!(d_flags & 2)) {
181 bb_error_msg_and_die("with --parents, the destination must be a directory");
184 if (flags & FILEUTILS_RMDEST) {
185 flags |= FILEUTILS_FORCE;
189 /* ...if neither is a directory... */
190 if (!((s_flags | d_flags) & 2)
191 /* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */
192 || ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
194 /* Do a simple copy */
196 goto DO_COPY; /* NB: argc==2 -> *++argv==last */
201 #if ENABLE_FEATURE_CP_LONG_OPTIONS
202 if (flags & OPT_parents) {
205 dest = concat_path_file(last, *argv);
206 dest_dup = xstrdup(dest);
207 dest_dir = dirname(dest_dup);
208 if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) {
215 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
217 if (copy_file(*argv, dest, flags) < 0) {
218 status = EXIT_FAILURE;
220 if (*++argv == last) {
221 /* possibly leaking dest... */
224 /* don't move up: dest may be == last and not malloced! */
228 /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */