blob: de2e512be3b5ee510624b368a1f060615854055a
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 | |
11 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/cp.html */ |
12 | |
13 | /* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org) |
14 | * |
15 | * Size reduction. |
16 | */ |
17 | |
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" |
23 | //usage: IF_SELINUX( |
24 | //usage: "\n -c Preserve security context" |
25 | //usage: ) |
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" |
34 | |
35 | #include "libbb.h" |
36 | #include "libcoreutils/coreutils.h" |
37 | |
38 | /* This is a NOEXEC applet. Be very careful! */ |
39 | |
40 | int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
41 | int cp_main(int argc, char **argv) |
42 | { |
43 | struct stat source_stat; |
44 | struct stat dest_stat; |
45 | const char *last; |
46 | const char *dest; |
47 | int s_flags; |
48 | int d_flags; |
49 | int flags; |
50 | int status; |
51 | enum { |
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), |
58 | #endif |
59 | }; |
60 | |
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) |
66 | // -a = -pdR |
67 | opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR"; |
68 | #if ENABLE_FEATURE_CP_LONG_OPTIONS |
69 | applet_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" |
80 | ; |
81 | #endif |
82 | // -v (--verbose) is ignored |
83 | flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPv"); |
84 | /* Options of cp from GNU coreutils 6.10: |
85 | * -a, --archive |
86 | * -f, --force |
87 | * -i, --interactive |
88 | * -l, --link |
89 | * -L, --dereference |
90 | * -P, --no-dereference |
91 | * -R, -r, --recursive |
92 | * -s, --symbolic-link |
93 | * -v, --verbose |
94 | * -H follow command-line symbolic links in SOURCE |
95 | * -d same as --no-dereference --preserve=links |
96 | * -p same as --preserve=mode,ownership,timestamps |
97 | * -c same as --preserve=context |
98 | * --parents |
99 | * use full source file name under DIRECTORY |
100 | * NOT SUPPORTED IN BBOX: |
101 | * --backup[=CONTROL] |
102 | * make a backup of each existing destination file |
103 | * -b like --backup but does not accept an argument |
104 | * --copy-contents |
105 | * copy contents of special files when recursive |
106 | * --preserve[=ATTR_LIST] |
107 | * preserve attributes (default: mode,ownership,timestamps), |
108 | * if possible additional attributes: security context,links,all |
109 | * --no-preserve=ATTR_LIST |
110 | * --remove-destination |
111 | * remove each existing destination file before attempting to open |
112 | * --sparse=WHEN |
113 | * control creation of sparse files |
114 | * --strip-trailing-slashes |
115 | * remove any trailing slashes from each SOURCE argument |
116 | * -S, --suffix=SUFFIX |
117 | * override the usual backup suffix |
118 | * -t, --target-directory=DIRECTORY |
119 | * copy all SOURCE arguments into DIRECTORY |
120 | * -T, --no-target-directory |
121 | * treat DEST as a normal file |
122 | * -u, --update |
123 | * copy only when the SOURCE file is newer than the destination |
124 | * file or when the destination file is missing |
125 | * -x, --one-file-system |
126 | * stay on this file system |
127 | * -Z, --context=CONTEXT |
128 | * (SELinux) set SELinux security context of copy to CONTEXT |
129 | */ |
130 | argc -= optind; |
131 | argv += optind; |
132 | /* Reverse this bit. If there is -d, bit is not set: */ |
133 | flags ^= FILEUTILS_DEREFERENCE; |
134 | /* coreutils 6.9 compat: |
135 | * by default, "cp" derefs symlinks (creates regular dest files), |
136 | * but "cp -R" does not. We switch off deref if -r or -R (see above). |
137 | * However, "cp -RL" must still deref symlinks: */ |
138 | if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */ |
139 | flags |= FILEUTILS_DEREFERENCE; |
140 | |
141 | #if ENABLE_SELINUX |
142 | if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) { |
143 | selinux_or_die(); |
144 | } |
145 | #endif |
146 | |
147 | status = EXIT_SUCCESS; |
148 | last = argv[argc - 1]; |
149 | /* If there are only two arguments and... */ |
150 | if (argc == 2) { |
151 | s_flags = cp_mv_stat2(*argv, &source_stat, |
152 | (flags & FILEUTILS_DEREFERENCE) ? stat : lstat); |
153 | if (s_flags < 0) |
154 | return EXIT_FAILURE; |
155 | d_flags = cp_mv_stat(last, &dest_stat); |
156 | if (d_flags < 0) |
157 | return EXIT_FAILURE; |
158 | |
159 | #if ENABLE_FEATURE_CP_LONG_OPTIONS |
160 | if (flags & OPT_parents) { |
161 | if (!(d_flags & 2)) { |
162 | bb_error_msg_and_die("with --parents, the destination must be a directory"); |
163 | } |
164 | } |
165 | #endif |
166 | |
167 | /* ...if neither is a directory... */ |
168 | if (!((s_flags | d_flags) & 2) |
169 | /* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */ |
170 | || ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags) |
171 | ) { |
172 | /* Do a simple copy */ |
173 | dest = last; |
174 | goto DO_COPY; /* NB: argc==2 -> *++argv==last */ |
175 | } |
176 | } |
177 | |
178 | while (1) { |
179 | #if ENABLE_FEATURE_CP_LONG_OPTIONS |
180 | if (flags & OPT_parents) { |
181 | char *dest_dup; |
182 | char *dest_dir; |
183 | dest = concat_path_file(last, *argv); |
184 | dest_dup = xstrdup(dest); |
185 | dest_dir = dirname(dest_dup); |
186 | if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) { |
187 | return EXIT_FAILURE; |
188 | } |
189 | free(dest_dup); |
190 | goto DO_COPY; |
191 | } |
192 | #endif |
193 | dest = concat_path_file(last, bb_get_last_path_component_strip(*argv)); |
194 | DO_COPY: |
195 | if (copy_file(*argv, dest, flags) < 0) { |
196 | status = EXIT_FAILURE; |
197 | } |
198 | if (*++argv == last) { |
199 | /* possibly leaking dest... */ |
200 | break; |
201 | } |
202 | /* don't move up: dest may be == last and not malloced! */ |
203 | free((void*)dest); |
204 | } |
205 | |
206 | /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */ |
207 | return status; |
208 | } |
209 |