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.
11 /* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
13 /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
18 //usage:#define cp_trivial_usage
19 //usage: "[OPTIONS] SOURCE... DEST"
20 //usage:#define cp_full_usage "\n\n"
21 //usage: "Copy SOURCE(s) to DEST\n"
22 //usage: "\n -a Same as -dpR"
24 //usage: "\n -c Preserve security context"
26 //usage: "\n -R,-r Recurse"
27 //usage: "\n -d,-P Preserve symlinks (default if -R)"
28 //usage: "\n -L Follow all symlinks"
29 //usage: "\n -H Follow symlinks on command line"
30 //usage: "\n -p Preserve file attributes if possible"
31 //usage: "\n -f Overwrite"
32 //usage: "\n -i Prompt before overwrite"
33 //usage: "\n -l,-s Create (sym)links"
36 #include "libcoreutils/coreutils.h"
38 /* This is a NOEXEC applet. Be very careful! */
40 int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
41 int cp_main(int argc, char **argv)
43 struct stat source_stat;
44 struct stat dest_stat;
52 OPT_a = 1 << (sizeof(FILEUTILS_CP_OPTSTR)-1),
53 OPT_r = 1 << (sizeof(FILEUTILS_CP_OPTSTR)),
54 OPT_P = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+1),
55 OPT_v = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2),
56 #if ENABLE_FEATURE_CP_LONG_OPTIONS
57 OPT_parents = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+3),
61 // Need at least two arguments
62 // Soft- and hardlinking doesn't mix
63 // -P and -d are the same (-P is POSIX, -d is GNU)
64 // -r and -R are the same
65 // -R (and therefore -r) turns on -d (coreutils does this)
67 opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR";
68 #if ENABLE_FEATURE_CP_LONG_OPTIONS
70 "archive\0" No_argument "a"
71 "force\0" No_argument "f"
72 "interactive\0" No_argument "i"
73 "link\0" No_argument "l"
74 "dereference\0" No_argument "L"
75 "no-dereference\0" No_argument "P"
76 "recursive\0" No_argument "R"
77 "symbolic-link\0" No_argument "s"
78 "verbose\0" No_argument "v"
79 "parents\0" No_argument "\xff"
82 flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPv");
83 /* Options of cp from GNU coreutils 6.10:
89 * -P, --no-dereference
93 * -H follow command-line symbolic links in SOURCE
94 * -d same as --no-dereference --preserve=links
95 * -p same as --preserve=mode,ownership,timestamps
96 * -c same as --preserve=context
98 * use full source file name under DIRECTORY
99 * NOT SUPPORTED IN BBOX:
101 * make a backup of each existing destination file
102 * -b like --backup but does not accept an argument
104 * copy contents of special files when recursive
105 * --preserve[=ATTR_LIST]
106 * preserve attributes (default: mode,ownership,timestamps),
107 * if possible additional attributes: security context,links,all
108 * --no-preserve=ATTR_LIST
109 * --remove-destination
110 * remove each existing destination file before attempting to open
112 * control creation of sparse files
113 * --strip-trailing-slashes
114 * remove any trailing slashes from each SOURCE argument
115 * -S, --suffix=SUFFIX
116 * override the usual backup suffix
117 * -t, --target-directory=DIRECTORY
118 * copy all SOURCE arguments into DIRECTORY
119 * -T, --no-target-directory
120 * treat DEST as a normal file
122 * copy only when the SOURCE file is newer than the destination
123 * file or when the destination file is missing
124 * -x, --one-file-system
125 * stay on this file system
126 * -Z, --context=CONTEXT
127 * (SELinux) set SELinux security context of copy to CONTEXT
131 /* Reverse this bit. If there is -d, bit is not set: */
132 flags ^= FILEUTILS_DEREFERENCE;
133 /* coreutils 6.9 compat:
134 * by default, "cp" derefs symlinks (creates regular dest files),
135 * but "cp -R" does not. We switch off deref if -r or -R (see above).
136 * However, "cp -RL" must still deref symlinks: */
137 if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */
138 flags |= FILEUTILS_DEREFERENCE;
141 if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
146 status = EXIT_SUCCESS;
147 last = argv[argc - 1];
148 /* If there are only two arguments and... */
150 s_flags = cp_mv_stat2(*argv, &source_stat,
151 (flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
154 d_flags = cp_mv_stat(last, &dest_stat);
158 #if ENABLE_FEATURE_CP_LONG_OPTIONS
159 if (flags & OPT_parents) {
160 if (!(d_flags & 2)) {
161 bb_error_msg_and_die("with --parents, the destination must be a directory");
166 /* ...if neither is a directory... */
167 if (!((s_flags | d_flags) & 2)
168 /* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */
169 || ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
171 /* Do a simple copy */
173 goto DO_COPY; /* NB: argc==2 -> *++argv==last */
178 #if ENABLE_FEATURE_CP_LONG_OPTIONS
179 if (flags & OPT_parents) {
182 dest = concat_path_file(last, *argv);
183 dest_dup = xstrdup(dest);
184 dest_dir = dirname(dest_dup);
185 if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) {
192 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
194 if (copy_file(*argv, dest, flags) < 0) {
195 status = EXIT_FAILURE;
197 if (*++argv == last) {
198 /* possibly leaking dest... */
201 /* don't move up: dest may be == last and not malloced! */
205 /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */