1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini cp implementation for busybox 4 * 5 * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu> 6 * SELinux support by Yuichi Nakamura <ynakam@hitachisoft.jp> 7 * 8 * Licensed under GPLv2 or later, see file LICENSE in this source tree. 9 */ 10/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) 11 * 12 * Size reduction. 13 */ 14//config:config CP 15//config: bool "cp (9.7 kb)" 16//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 21//config: bool "Enable long options" 22//config: default y 23//config: depends on CP && LONG_OPTS 24//config: help 25//config: Enable long options. 26//config: Also add support for --parents option. 27 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) */ 30 31//kbuild:lib-$(CONFIG_CP) += cp.o 32 33/* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */ 34 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" 40//usage: IF_SELINUX( 41//usage: "\n -c Preserve security context" 42//usage: ) 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" 53 54#include "libbb.h" 55#include "libcoreutils/coreutils.h" 56 57/* This is a NOEXEC applet. Be very careful! */ 58 59int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 60int cp_main(int argc, char **argv) 61{ 62 struct stat source_stat; 63 struct stat dest_stat; 64 const char *last; 65 const char *dest; 66 int s_flags; 67 int d_flags; 68 int flags; 69 int status; 70 enum { 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), 75#endif 76 }; 77 78#if ENABLE_FEATURE_CP_LONG_OPTIONS 79 flags = getopt32long(argv, "^" 80 FILEUTILS_CP_OPTSTR 81 "\0" 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) 87 // -a = -pdR 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" 102 ); 103#else 104 flags = getopt32(argv, "^" 105 FILEUTILS_CP_OPTSTR 106 "\0" 107 "-2:l--s:s--l:Pd:rRd:Rd:apdR" 108 ); 109#endif 110 /* Options of cp from GNU coreutils 6.10: 111 * -a, --archive 112 * -f, --force 113 * -i, --interactive 114 * -l, --link 115 * -L, --dereference 116 * -P, --no-dereference 117 * -R, -r, --recursive 118 * -s, --symbolic-link 119 * -v, --verbose 120 * -H follow command-line symbolic links in SOURCE 121 * -d same as --no-dereference --preserve=links 122 * -p same as --preserve=mode,ownership,timestamps 123 * -c same as --preserve=context 124 * -u, --update 125 * copy only when the SOURCE file is newer than the destination 126 * file or when the destination file is missing 127 * --remove-destination 128 * remove each existing destination file before attempting to open 129 * --parents 130 * use full source file name under DIRECTORY 131 * -T, --no-target-directory 132 * treat DEST as a normal file 133 * NOT SUPPORTED IN BBOX: 134 * --backup[=CONTROL] 135 * make a backup of each existing destination file 136 * -b like --backup but does not accept an argument 137 * --copy-contents 138 * copy contents of special files when recursive 139 * --preserve[=ATTR_LIST] 140 * preserve attributes (default: mode,ownership,timestamps), 141 * if possible additional attributes: security context,links,all 142 * --no-preserve=ATTR_LIST 143 * --sparse=WHEN 144 * control creation of sparse files 145 * --strip-trailing-slashes 146 * remove any trailing slashes from each SOURCE argument 147 * -S, --suffix=SUFFIX 148 * override the usual backup suffix 149 * -t, --target-directory=DIRECTORY 150 * copy all SOURCE arguments into DIRECTORY 151 * -x, --one-file-system 152 * stay on this file system 153 * -Z, --context=CONTEXT 154 * (SELinux) set SELinux security context of copy to CONTEXT 155 */ 156 argc -= optind; 157 argv += optind; 158 /* Reverse this bit. If there is -d, bit is not set: */ 159 flags ^= FILEUTILS_DEREFERENCE; 160 /* coreutils 6.9 compat: 161 * by default, "cp" derefs symlinks (creates regular dest files), 162 * but "cp -R" does not. We switch off deref if -r or -R (see above). 163 * However, "cp -RL" must still deref symlinks: */ 164 if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */ 165 flags |= FILEUTILS_DEREFERENCE; 166 167#if ENABLE_SELINUX 168 if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) { 169 selinux_or_die(); 170 } 171#endif 172 173 status = EXIT_SUCCESS; 174 last = argv[argc - 1]; 175 /* If there are only two arguments and... */ 176 if (argc == 2) { 177 s_flags = cp_mv_stat2(*argv, &source_stat, 178 (flags & FILEUTILS_DEREFERENCE) ? stat : lstat); 179 if (s_flags < 0) 180 return EXIT_FAILURE; 181 d_flags = cp_mv_stat(last, &dest_stat); 182 if (d_flags < 0) 183 return EXIT_FAILURE; 184 185 if (flags & FILEUTILS_NO_TARGET_DIR) { /* -T */ 186 if (!(s_flags & 2) && (d_flags & 2)) 187 /* cp -T NOTDIR DIR */ 188 bb_error_msg_and_die("'%s' is a directory", last); 189 } 190 191#if ENABLE_FEATURE_CP_LONG_OPTIONS 192 //bb_error_msg("flags:%x FILEUTILS_RMDEST:%x OPT_parents:%x", 193 // flags, FILEUTILS_RMDEST, OPT_parents); 194 if (flags & OPT_parents) { 195 if (!(d_flags & 2)) { 196 bb_error_msg_and_die("with --parents, the destination must be a directory"); 197 } 198 } 199 if (flags & FILEUTILS_RMDEST) { 200 flags |= FILEUTILS_FORCE; 201 } 202#endif 203 204 /* ...if neither is a directory... */ 205 if (!((s_flags | d_flags) & 2) 206 /* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */ 207 || ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags) 208 || (flags & FILEUTILS_NO_TARGET_DIR) 209 ) { 210 /* Do a simple copy */ 211 dest = last; 212 goto DO_COPY; /* NB: argc==2 -> *++argv==last */ 213 } 214 } else if (flags & FILEUTILS_NO_TARGET_DIR) { 215 bb_error_msg_and_die("too many arguments"); 216 } 217 218 while (1) { 219#if ENABLE_FEATURE_CP_LONG_OPTIONS 220 if (flags & OPT_parents) { 221 char *dest_dup; 222 char *dest_dir; 223 dest = concat_path_file(last, *argv); 224 dest_dup = xstrdup(dest); 225 dest_dir = dirname(dest_dup); 226 if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) { 227 return EXIT_FAILURE; 228 } 229 free(dest_dup); 230 goto DO_COPY; 231 } 232#endif 233 dest = concat_path_file(last, bb_get_last_path_component_strip(*argv)); 234 DO_COPY: 235 if (copy_file(*argv, dest, flags) < 0) { 236 status = EXIT_FAILURE; 237 } 238 if (*++argv == last) { 239 /* possibly leaking dest... */ 240 break; 241 } 242 /* don't move up: dest may be == last and not malloced! */ 243 free((void*)dest); 244 } 245 246 /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */ 247 return status; 248} 249