Contents of /trunk/mkinitrd-magellan/busybox/coreutils/cp.c
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Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
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Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
File MIME type: text/plain
File size: 5632 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
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 GPL v2 or later, see file LICENSE in this tarball for details. |
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 | #include "libbb.h" |
19 | #include "libcoreutils/coreutils.h" |
20 | |
21 | /* This is a NOEXEC applet. Be very careful! */ |
22 | |
23 | int cp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
24 | int cp_main(int argc, char **argv) |
25 | { |
26 | struct stat source_stat; |
27 | struct stat dest_stat; |
28 | const char *last; |
29 | const char *dest; |
30 | int s_flags; |
31 | int d_flags; |
32 | int flags; |
33 | int status; |
34 | enum { |
35 | OPT_a = 1 << (sizeof(FILEUTILS_CP_OPTSTR)-1), |
36 | OPT_r = 1 << (sizeof(FILEUTILS_CP_OPTSTR)), |
37 | OPT_P = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+1), |
38 | OPT_v = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+2), |
39 | #if ENABLE_FEATURE_CP_LONG_OPTIONS |
40 | OPT_parents = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+3), |
41 | #endif |
42 | }; |
43 | |
44 | // Need at least two arguments |
45 | // Soft- and hardlinking doesn't mix |
46 | // -P and -d are the same (-P is POSIX, -d is GNU) |
47 | // -r and -R are the same |
48 | // -R (and therefore -r) turns on -d (coreutils does this) |
49 | // -a = -pdR |
50 | opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR"; |
51 | #if ENABLE_FEATURE_CP_LONG_OPTIONS |
52 | applet_long_options = |
53 | "archive\0" No_argument "a" |
54 | "force\0" No_argument "f" |
55 | "interactive\0" No_argument "i" |
56 | "link\0" No_argument "l" |
57 | "dereference\0" No_argument "L" |
58 | "no-dereference\0" No_argument "P" |
59 | "recursive\0" No_argument "R" |
60 | "symbolic-link\0" No_argument "s" |
61 | "verbose\0" No_argument "v" |
62 | "parents\0" No_argument "\xff" |
63 | ; |
64 | #endif |
65 | // -v (--verbose) is ignored |
66 | flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPv"); |
67 | /* Options of cp from GNU coreutils 6.10: |
68 | * -a, --archive |
69 | * -f, --force |
70 | * -i, --interactive |
71 | * -l, --link |
72 | * -L, --dereference |
73 | * -P, --no-dereference |
74 | * -R, -r, --recursive |
75 | * -s, --symbolic-link |
76 | * -v, --verbose |
77 | * -H follow command-line symbolic links in SOURCE |
78 | * -d same as --no-dereference --preserve=links |
79 | * -p same as --preserve=mode,ownership,timestamps |
80 | * -c same as --preserve=context |
81 | * --parents |
82 | * use full source file name under DIRECTORY |
83 | * NOT SUPPORTED IN BBOX: |
84 | * --backup[=CONTROL] |
85 | * make a backup of each existing destination file |
86 | * -b like --backup but does not accept an argument |
87 | * --copy-contents |
88 | * copy contents of special files when recursive |
89 | * --preserve[=ATTR_LIST] |
90 | * preserve attributes (default: mode,ownership,timestamps), |
91 | * if possible additional attributes: security context,links,all |
92 | * --no-preserve=ATTR_LIST |
93 | * --remove-destination |
94 | * remove each existing destination file before attempting to open |
95 | * --sparse=WHEN |
96 | * control creation of sparse files |
97 | * --strip-trailing-slashes |
98 | * remove any trailing slashes from each SOURCE argument |
99 | * -S, --suffix=SUFFIX |
100 | * override the usual backup suffix |
101 | * -t, --target-directory=DIRECTORY |
102 | * copy all SOURCE arguments into DIRECTORY |
103 | * -T, --no-target-directory |
104 | * treat DEST as a normal file |
105 | * -u, --update |
106 | * copy only when the SOURCE file is newer than the destination |
107 | * file or when the destination file is missing |
108 | * -x, --one-file-system |
109 | * stay on this file system |
110 | * -Z, --context=CONTEXT |
111 | * (SELinux) set SELinux security context of copy to CONTEXT |
112 | */ |
113 | argc -= optind; |
114 | argv += optind; |
115 | /* Reverse this bit. If there is -d, bit is not set: */ |
116 | flags ^= FILEUTILS_DEREFERENCE; |
117 | /* coreutils 6.9 compat: |
118 | * by default, "cp" derefs symlinks (creates regular dest files), |
119 | * but "cp -R" does not. We switch off deref if -r or -R (see above). |
120 | * However, "cp -RL" must still deref symlinks: */ |
121 | if (flags & FILEUTILS_DEREF_SOFTLINK) /* -L */ |
122 | flags |= FILEUTILS_DEREFERENCE; |
123 | |
124 | #if ENABLE_SELINUX |
125 | if (flags & FILEUTILS_PRESERVE_SECURITY_CONTEXT) { |
126 | selinux_or_die(); |
127 | } |
128 | #endif |
129 | |
130 | status = EXIT_SUCCESS; |
131 | last = argv[argc - 1]; |
132 | /* If there are only two arguments and... */ |
133 | if (argc == 2) { |
134 | s_flags = cp_mv_stat2(*argv, &source_stat, |
135 | (flags & FILEUTILS_DEREFERENCE) ? stat : lstat); |
136 | if (s_flags < 0) |
137 | return EXIT_FAILURE; |
138 | d_flags = cp_mv_stat(last, &dest_stat); |
139 | if (d_flags < 0) |
140 | return EXIT_FAILURE; |
141 | |
142 | #if ENABLE_FEATURE_CP_LONG_OPTIONS |
143 | if (flags & OPT_parents) { |
144 | if (!(d_flags & 2)) { |
145 | bb_error_msg_and_die("with --parents, the destination must be a directory"); |
146 | } |
147 | } |
148 | #endif |
149 | |
150 | /* ...if neither is a directory... */ |
151 | if (!((s_flags | d_flags) & 2) |
152 | /* ...or: recursing, the 1st is a directory, and the 2nd doesn't exist... */ |
153 | || ((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags) |
154 | ) { |
155 | /* Do a simple copy */ |
156 | dest = last; |
157 | goto DO_COPY; /* NB: argc==2 -> *++argv==last */ |
158 | } |
159 | } |
160 | |
161 | while (1) { |
162 | #if ENABLE_FEATURE_CP_LONG_OPTIONS |
163 | if (flags & OPT_parents) { |
164 | char *dest_dup; |
165 | char *dest_dir; |
166 | dest = concat_path_file(last, *argv); |
167 | dest_dup = xstrdup(dest); |
168 | dest_dir = dirname(dest_dup); |
169 | if (bb_make_directory(dest_dir, -1, FILEUTILS_RECUR)) { |
170 | return EXIT_FAILURE; |
171 | } |
172 | free(dest_dup); |
173 | goto DO_COPY; |
174 | } |
175 | #endif |
176 | dest = concat_path_file(last, bb_get_last_path_component_strip(*argv)); |
177 | DO_COPY: |
178 | if (copy_file(*argv, dest, flags) < 0) { |
179 | status = EXIT_FAILURE; |
180 | } |
181 | if (*++argv == last) { |
182 | /* possibly leaking dest... */ |
183 | break; |
184 | } |
185 | /* don't move up: dest may be == last and not malloced! */ |
186 | free((void*)dest); |
187 | } |
188 | |
189 | /* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */ |
190 | return status; |
191 | } |