blob: 726859c5f1a1122e5d98fe0e3bad880606855bf5 [file] [log] [blame]
Matt Kraai91b28552001-04-23 18:53:07 +00001/* vi: set sw=4 ts=4: */
2/*
3 * Mini cp implementation for busybox
4 *
Matt Kraai91b28552001-04-23 18:53:07 +00005 * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
Denis Vlasenko49622d72007-03-10 16:58:49 +00006 * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp>
Matt Kraai91b28552001-04-23 18:53:07 +00007 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +02008 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
Matt Kraai91b28552001-04-23 18:53:07 +00009 */
Manuel Novoa III cad53642003-03-19 09:13:01 +000010/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
11 *
12 * Size reduction.
13 */
Denys Vlasenkoaf3f4202016-11-23 14:46:56 +010014//config:config CP
Denys Vlasenko4eed2c62017-07-18 22:01:24 +020015//config: bool "cp (9.7 kb)"
Denys Vlasenkoaf3f4202016-11-23 14:46:56 +010016//config: default y
17//config: help
18//config: cp is used to copy files and directories.
19//config:
20//config:config FEATURE_CP_LONG_OPTIONS
Denys Vlasenkof5604222017-01-10 14:58:54 +010021//config: bool "Enable long options"
Denys Vlasenkoaf3f4202016-11-23 14:46:56 +010022//config: default y
23//config: depends on CP && LONG_OPTS
24//config: help
Denys Vlasenkof5604222017-01-10 14:58:54 +010025//config: Enable long options.
Denys Vlasenkoaf3f4202016-11-23 14:46:56 +010026//config: Also add support for --parents option.
27
28//applet:IF_CP(APPLET_NOEXEC(cp, cp, BB_DIR_BIN, BB_SUID_DROP, cp))
29
30//kbuild:lib-$(CONFIG_CP) += cp.o
31
32/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */
Manuel Novoa III cad53642003-03-19 09:13:01 +000033
Pere Orga34425382011-03-31 14:43:25 +020034//usage:#define cp_trivial_usage
Denys Vlasenkob3439d42012-03-05 10:09:18 +010035//usage: "[OPTIONS] SOURCE... DEST"
Pere Orga34425382011-03-31 14:43:25 +020036//usage:#define cp_full_usage "\n\n"
Denys Vlasenkob3439d42012-03-05 10:09:18 +010037//usage: "Copy SOURCE(s) to DEST\n"
Pere Orga34425382011-03-31 14:43:25 +020038//usage: "\n -a Same as -dpR"
39//usage: IF_SELINUX(
40//usage: "\n -c Preserve security context"
41//usage: )
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"
Denys Vlasenko877dedb2016-05-27 00:46:38 +020050//usage: "\n -u Copy only newer files"
Pere Orga34425382011-03-31 14:43:25 +020051
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000052#include "libbb.h"
Manuel Novoa III cad53642003-03-19 09:13:01 +000053#include "libcoreutils/coreutils.h"
54
Denis Vlasenko99912ca2007-04-10 15:43:37 +000055/* This is a NOEXEC applet. Be very careful! */
56
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +000057int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Rob Landleydfba7412006-03-06 20:47:33 +000058int cp_main(int argc, char **argv)
Matt Kraai91b28552001-04-23 18:53:07 +000059{
Manuel Novoa III cad53642003-03-19 09:13:01 +000060 struct stat source_stat;
61 struct stat dest_stat;
62 const char *last;
63 const char *dest;
64 int s_flags;
65 int d_flags;
66 int flags;
Denys Vlasenko48f11612009-09-26 14:31:04 +020067 int status;
Denis Vlasenkof24e1f42006-10-21 23:40:20 +000068 enum {
Denys Vlasenko877dedb2016-05-27 00:46:38 +020069 FILEUTILS_CP_OPTNUM = sizeof(FILEUTILS_CP_OPTSTR)-1,
Denys Vlasenko48f11612009-09-26 14:31:04 +020070#if ENABLE_FEATURE_CP_LONG_OPTIONS
Denys Vlasenko877dedb2016-05-27 00:46:38 +020071 /*OPT_rmdest = FILEUTILS_RMDEST = 1 << FILEUTILS_CP_OPTNUM */
72 OPT_parents = 1 << (FILEUTILS_CP_OPTNUM+1),
Denys Vlasenko48f11612009-09-26 14:31:04 +020073#endif
Denis Vlasenkof24e1f42006-10-21 23:40:20 +000074 };
Matt Kraai91b28552001-04-23 18:53:07 +000075
Denis Vlasenko6666ac42007-08-24 21:46:24 +000076 // Need at least two arguments
Denis Vlasenkoc0431ed2008-04-27 22:06:24 +000077 // Soft- and hardlinking doesn't mix
Denis Vlasenkof24e1f42006-10-21 23:40:20 +000078 // -P and -d are the same (-P is POSIX, -d is GNU)
79 // -r and -R are the same
Denis Vlasenko80f647c2008-04-11 10:54:37 +000080 // -R (and therefore -r) turns on -d (coreutils does this)
Denis Vlasenkof24e1f42006-10-21 23:40:20 +000081 // -a = -pdR
Denys Vlasenkoa40f0622010-01-15 22:05:07 +010082 opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR";
Denys Vlasenko48f11612009-09-26 14:31:04 +020083#if ENABLE_FEATURE_CP_LONG_OPTIONS
84 applet_long_options =
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"
Denys Vlasenko877dedb2016-05-27 00:46:38 +020094 "update\0" No_argument "u"
95 "remove-destination\0" No_argument "\xff"
96 "parents\0" No_argument "\xfe"
Denys Vlasenko48f11612009-09-26 14:31:04 +020097 ;
98#endif
Denys Vlasenko877dedb2016-05-27 00:46:38 +020099 flags = getopt32(argv, FILEUTILS_CP_OPTSTR);
Denis Vlasenko0b281032009-03-20 14:04:00 +0000100 /* Options of cp from GNU coreutils 6.10:
101 * -a, --archive
102 * -f, --force
103 * -i, --interactive
104 * -l, --link
105 * -L, --dereference
106 * -P, --no-dereference
107 * -R, -r, --recursive
108 * -s, --symbolic-link
109 * -v, --verbose
110 * -H follow command-line symbolic links in SOURCE
111 * -d same as --no-dereference --preserve=links
112 * -p same as --preserve=mode,ownership,timestamps
113 * -c same as --preserve=context
Denys Vlasenko877dedb2016-05-27 00:46:38 +0200114 * -u, --update
115 * copy only when the SOURCE file is newer than the destination
116 * file or when the destination file is missing
117 * --remove-destination
118 * remove each existing destination file before attempting to open
Denys Vlasenko48f11612009-09-26 14:31:04 +0200119 * --parents
120 * use full source file name under DIRECTORY
Denis Vlasenko0b281032009-03-20 14:04:00 +0000121 * NOT SUPPORTED IN BBOX:
Denis Vlasenko0b281032009-03-20 14:04:00 +0000122 * --backup[=CONTROL]
123 * make a backup of each existing destination file
124 * -b like --backup but does not accept an argument
125 * --copy-contents
126 * copy contents of special files when recursive
127 * --preserve[=ATTR_LIST]
128 * preserve attributes (default: mode,ownership,timestamps),
129 * if possible additional attributes: security context,links,all
130 * --no-preserve=ATTR_LIST
Denis Vlasenko0b281032009-03-20 14:04:00 +0000131 * --sparse=WHEN
132 * control creation of sparse files
133 * --strip-trailing-slashes
134 * remove any trailing slashes from each SOURCE argument
135 * -S, --suffix=SUFFIX
136 * override the usual backup suffix
137 * -t, --target-directory=DIRECTORY
138 * copy all SOURCE arguments into DIRECTORY
139 * -T, --no-target-directory
140 * treat DEST as a normal file
Denis Vlasenko0b281032009-03-20 14:04:00 +0000141 * -x, --one-file-system
142 * stay on this file system
143 * -Z, --context=CONTEXT
144 * (SELinux) set SELinux security context of copy to CONTEXT
145 */
Denis Vlasenko6666ac42007-08-24 21:46:24 +0000146 argc -= optind;
147 argv += optind;
Denys Vlasenkoa40f0622010-01-15 22:05:07 +0100148 /* Reverse this bit. If there is -d, bit is not set: */
149 flags ^= FILEUTILS_DEREFERENCE;
Denis Vlasenkoc0431ed2008-04-27 22:06:24 +0000150 /* coreutils 6.9 compat:
151 * by default, "cp" derefs symlinks (creates regular dest files),
152 * but "cp -R" does not. We switch off deref if -r or -R (see above).
153 * However, "cp -RL" must still deref symlinks: */
154 if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */
155 flags |= FILEUTILS_DEREFERENCE;
Manuel Novoa III cad53642003-03-19 09:13:01 +0000156
Denis Vlasenkoc86e0522007-03-20 11:30:28 +0000157#if ENABLE_SELINUX
Denis Vlasenko49622d72007-03-10 16:58:49 +0000158 if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) {
159 selinux_or_die();
160 }
161#endif
162
Denys Vlasenko48f11612009-09-26 14:31:04 +0200163 status = EXIT_SUCCESS;
Manuel Novoa III cad53642003-03-19 09:13:01 +0000164 last = argv[argc - 1];
Matt Kraai91b28552001-04-23 18:53:07 +0000165 /* If there are only two arguments and... */
Denis Vlasenko6666ac42007-08-24 21:46:24 +0000166 if (argc == 2) {
Manuel Novoa III cad53642003-03-19 09:13:01 +0000167 s_flags = cp_mv_stat2(*argv, &source_stat,
Denys Vlasenko48f11612009-09-26 14:31:04 +0200168 (flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
Denis Vlasenkof24e1f42006-10-21 23:40:20 +0000169 if (s_flags < 0)
170 return EXIT_FAILURE;
171 d_flags = cp_mv_stat(last, &dest_stat);
172 if (d_flags < 0)
173 return EXIT_FAILURE;
174
Denys Vlasenko48f11612009-09-26 14:31:04 +0200175#if ENABLE_FEATURE_CP_LONG_OPTIONS
Denys Vlasenko877dedb2016-05-27 00:46:38 +0200176 //bb_error_msg("flags:%x FILEUTILS_RMDEST:%x OPT_parents:%x",
177 // flags, FILEUTILS_RMDEST, OPT_parents);
Denys Vlasenko48f11612009-09-26 14:31:04 +0200178 if (flags & OPT_parents) {
179 if (!(d_flags & 2)) {
180 bb_error_msg_and_die("with --parents, the destination must be a directory");
181 }
182 }
Denys Vlasenko877dedb2016-05-27 00:46:38 +0200183 if (flags & FILEUTILS_RMDEST) {
184 flags |= FILEUTILS_FORCE;
185 }
Denys Vlasenko48f11612009-09-26 14:31:04 +0200186#endif
187
188 /* ...if neither is a directory... */
189 if (!((s_flags | d_flags) & 2)
190 /* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */
191 || ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000192 ) {
Denys Vlasenko48f11612009-09-26 14:31:04 +0200193 /* Do a simple copy */
Denis Vlasenko6666ac42007-08-24 21:46:24 +0000194 dest = last;
195 goto DO_COPY; /* NB: argc==2 -> *++argv==last */
Matt Kraai91b28552001-04-23 18:53:07 +0000196 }
197 }
198
Denis Vlasenko6666ac42007-08-24 21:46:24 +0000199 while (1) {
Denys Vlasenko48f11612009-09-26 14:31:04 +0200200#if ENABLE_FEATURE_CP_LONG_OPTIONS
201 if (flags & OPT_parents) {
202 char *dest_dup;
203 char *dest_dir;
204 dest = concat_path_file(last, *argv);
205 dest_dup = xstrdup(dest);
206 dest_dir = dirname(dest_dup);
207 if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) {
208 return EXIT_FAILURE;
209 }
210 free(dest_dup);
211 goto DO_COPY;
212 }
213#endif
Denis Vlasenko818322b2007-09-24 18:27:04 +0000214 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv));
Denis Vlasenkof24e1f42006-10-21 23:40:20 +0000215 DO_COPY:
Manuel Novoa III cad53642003-03-19 09:13:01 +0000216 if (copy_file(*argv, dest, flags) < 0) {
Denys Vlasenko48f11612009-09-26 14:31:04 +0200217 status = EXIT_FAILURE;
Denis Vlasenko6666ac42007-08-24 21:46:24 +0000218 }
Denys Vlasenko48f11612009-09-26 14:31:04 +0200219 if (*++argv == last) {
Denys Vlasenkod5fddcd2009-10-08 01:32:44 +0200220 /* possibly leaking dest... */
Denys Vlasenko48f11612009-09-26 14:31:04 +0200221 break;
222 }
Denys Vlasenkod5fddcd2009-10-08 01:32:44 +0200223 /* don't move up: dest may be == last and not malloced! */
224 free((void*)dest);
Denis Vlasenko6666ac42007-08-24 21:46:24 +0000225 }
Matt Kraai91b28552001-04-23 18:53:07 +0000226
Denis Vlasenko6666ac42007-08-24 21:46:24 +0000227 /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */
Denis Vlasenkof24e1f42006-10-21 23:40:20 +0000228 return status;
Matt Kraai91b28552001-04-23 18:53:07 +0000229}