| 1 |
/*- |
| 2 |
* Copyright (c) 1988, 1993, 1994 |
| 3 |
* The Regents of the University of California. All rights reserved. |
| 4 |
* |
| 5 |
* This code is derived from software contributed to Berkeley by |
| 6 |
* David Hitz of Auspex Systems Inc. |
| 7 |
* |
| 8 |
* Redistribution and use in source and binary forms, with or without |
| 9 |
* modification, are permitted provided that the following conditions |
| 10 |
* are met: |
| 11 |
* 1. Redistributions of source code must retain the above copyright |
| 12 |
* notice, this list of conditions and the following disclaimer. |
| 13 |
* 2. Redistributions in binary form must reproduce the above copyright |
| 14 |
* notice, this list of conditions and the following disclaimer in the |
| 15 |
* documentation and/or other materials provided with the distribution. |
| 16 |
* 4. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
| 18 |
* without specific prior written permission. |
| 19 |
* |
| 20 |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 |
* SUCH DAMAGE. |
| 31 |
*/ |
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|
| 33 |
#if 0 |
| 34 |
#ifndef lint |
| 35 |
static char const copyright[] = |
| 36 |
"@(#) Copyright (c) 1988, 1993, 1994\n\ |
| 37 |
The Regents of the University of California. All rights reserved.\n"; |
| 38 |
#endif /* not lint */ |
| 39 |
|
| 40 |
#ifndef lint |
| 41 |
static char sccsid[] = "@(#)cp.c 8.2 (Berkeley) 4/1/94"; |
| 42 |
#endif /* not lint */ |
| 43 |
#endif |
| 44 |
#include <sys/cdefs.h> |
| 45 |
__FBSDID("$FreeBSD: release/10.0.0/bin/cp/cp.c 245535 2013-01-17 04:20:31Z eadler $"); |
| 46 |
|
| 47 |
/* |
| 48 |
* Cp copies source files to target files. |
| 49 |
* |
| 50 |
* The global PATH_T structure "to" always contains the path to the |
| 51 |
* current target file. Since fts(3) does not change directories, |
| 52 |
* this path can be either absolute or dot-relative. |
| 53 |
* |
| 54 |
* The basic algorithm is to initialize "to" and use fts(3) to traverse |
| 55 |
* the file hierarchy rooted in the argument list. A trivial case is the |
| 56 |
* case of 'cp file1 file2'. The more interesting case is the case of |
| 57 |
* 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the |
| 58 |
* path (relative to the root of the traversal) is appended to dir (stored |
| 59 |
* in "to") to form the final target path. |
| 60 |
*/ |
| 61 |
|
| 62 |
#include <sys/types.h> |
| 63 |
#include <sys/stat.h> |
| 64 |
|
| 65 |
#include <err.h> |
| 66 |
#include <errno.h> |
| 67 |
#include <fts.h> |
| 68 |
#include <limits.h> |
| 69 |
#include <signal.h> |
| 70 |
#include <stdio.h> |
| 71 |
#include <stdlib.h> |
| 72 |
#include <string.h> |
| 73 |
#include <unistd.h> |
| 74 |
|
| 75 |
#include "extern.h" |
| 76 |
|
| 77 |
#define STRIP_TRAILING_SLASH(p) { \ |
| 78 |
while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \ |
| 79 |
*--(p).p_end = 0; \ |
| 80 |
} |
| 81 |
|
| 82 |
static char emptystring[] = ""; |
| 83 |
|
| 84 |
PATH_T to = { to.p_path, emptystring, "" }; |
| 85 |
|
| 86 |
int fflag, iflag, lflag, nflag, pflag, vflag; |
| 87 |
static int Rflag, rflag; |
| 88 |
volatile sig_atomic_t info; |
| 89 |
|
| 90 |
enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE }; |
| 91 |
|
| 92 |
static int copy(char *[], enum op, int); |
| 93 |
static int mastercmp(const FTSENT * const *, const FTSENT * const *); |
| 94 |
static void siginfo(int __unused); |
| 95 |
|
| 96 |
int |
| 97 |
main(int argc, char *argv[]) |
| 98 |
{ |
| 99 |
struct stat to_stat, tmp_stat; |
| 100 |
enum op type; |
| 101 |
int Hflag, Lflag, ch, fts_options, r, have_trailing_slash; |
| 102 |
char *target; |
| 103 |
|
| 104 |
fts_options = FTS_NOCHDIR | FTS_PHYSICAL; |
| 105 |
Hflag = Lflag = 0; |
| 106 |
while ((ch = getopt(argc, argv, "HLPRafilnprvx")) != -1) |
| 107 |
switch (ch) { |
| 108 |
case 'H': |
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Hflag = 1; |
| 110 |
Lflag = 0; |
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break; |
| 112 |
case 'L': |
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Lflag = 1; |
| 114 |
Hflag = 0; |
| 115 |
break; |
| 116 |
case 'P': |
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Hflag = Lflag = 0; |
| 118 |
break; |
| 119 |
case 'R': |
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Rflag = 1; |
| 121 |
break; |
| 122 |
case 'a': |
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pflag = 1; |
| 124 |
Rflag = 1; |
| 125 |
Hflag = Lflag = 0; |
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break; |
| 127 |
case 'f': |
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fflag = 1; |
| 129 |
iflag = nflag = 0; |
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break; |
| 131 |
case 'i': |
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iflag = 1; |
| 133 |
fflag = nflag = 0; |
| 134 |
break; |
| 135 |
case 'l': |
| 136 |
lflag = 1; |
| 137 |
break; |
| 138 |
case 'n': |
| 139 |
nflag = 1; |
| 140 |
fflag = iflag = 0; |
| 141 |
break; |
| 142 |
case 'p': |
| 143 |
pflag = 1; |
| 144 |
break; |
| 145 |
case 'r': |
| 146 |
rflag = Lflag = 1; |
| 147 |
Hflag = 0; |
| 148 |
break; |
| 149 |
case 'v': |
| 150 |
vflag = 1; |
| 151 |
break; |
| 152 |
case 'x': |
| 153 |
fts_options |= FTS_XDEV; |
| 154 |
break; |
| 155 |
default: |
| 156 |
usage(); |
| 157 |
break; |
| 158 |
} |
| 159 |
argc -= optind; |
| 160 |
argv += optind; |
| 161 |
|
| 162 |
if (argc < 2) |
| 163 |
usage(); |
| 164 |
|
| 165 |
if (Rflag && rflag) |
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errx(1, "the -R and -r options may not be specified together"); |
| 167 |
if (rflag) |
| 168 |
Rflag = 1; |
| 169 |
if (Rflag) { |
| 170 |
if (Hflag) |
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fts_options |= FTS_COMFOLLOW; |
| 172 |
if (Lflag) { |
| 173 |
fts_options &= ~FTS_PHYSICAL; |
| 174 |
fts_options |= FTS_LOGICAL; |
| 175 |
} |
| 176 |
} else { |
| 177 |
fts_options &= ~FTS_PHYSICAL; |
| 178 |
fts_options |= FTS_LOGICAL | FTS_COMFOLLOW; |
| 179 |
} |
| 180 |
(void)signal(SIGINFO, siginfo); |
| 181 |
|
| 182 |
/* Save the target base in "to". */ |
| 183 |
target = argv[--argc]; |
| 184 |
if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path)) |
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errx(1, "%s: name too long", target); |
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to.p_end = to.p_path + strlen(to.p_path); |
| 187 |
if (to.p_path == to.p_end) { |
| 188 |
*to.p_end++ = '.'; |
| 189 |
*to.p_end = 0; |
| 190 |
} |
| 191 |
have_trailing_slash = (to.p_end[-1] == '/'); |
| 192 |
if (have_trailing_slash) |
| 193 |
STRIP_TRAILING_SLASH(to); |
| 194 |
to.target_end = to.p_end; |
| 195 |
|
| 196 |
/* Set end of argument list for fts(3). */ |
| 197 |
argv[argc] = NULL; |
| 198 |
|
| 199 |
/* |
| 200 |
* Cp has two distinct cases: |
| 201 |
* |
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* cp [-R] source target |
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* cp [-R] source1 ... sourceN directory |
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* |
| 205 |
* In both cases, source can be either a file or a directory. |
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* |
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* In (1), the target becomes a copy of the source. That is, if the |
| 208 |
* source is a file, the target will be a file, and likewise for |
| 209 |
* directories. |
| 210 |
* |
| 211 |
* In (2), the real target is not directory, but "directory/source". |
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*/ |
| 213 |
r = stat(to.p_path, &to_stat); |
| 214 |
if (r == -1 && errno != ENOENT) |
| 215 |
err(1, "%s", to.p_path); |
| 216 |
if (r == -1 || !S_ISDIR(to_stat.st_mode)) { |
| 217 |
/* |
| 218 |
* Case (1). Target is not a directory. |
| 219 |
*/ |
| 220 |
if (argc > 1) |
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errx(1, "%s is not a directory", to.p_path); |
| 222 |
|
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/* |
| 224 |
* Need to detect the case: |
| 225 |
* cp -R dir foo |
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* Where dir is a directory and foo does not exist, where |
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* we want pathname concatenations turned on but not for |
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* the initial mkdir(). |
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*/ |
| 230 |
if (r == -1) { |
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if (Rflag && (Lflag || Hflag)) |
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stat(*argv, &tmp_stat); |
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else |
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lstat(*argv, &tmp_stat); |
| 235 |
|
| 236 |
if (S_ISDIR(tmp_stat.st_mode) && Rflag) |
| 237 |
type = DIR_TO_DNE; |
| 238 |
else |
| 239 |
type = FILE_TO_FILE; |
| 240 |
} else |
| 241 |
type = FILE_TO_FILE; |
| 242 |
|
| 243 |
if (have_trailing_slash && type == FILE_TO_FILE) { |
| 244 |
if (r == -1) |
| 245 |
errx(1, "directory %s does not exist", |
| 246 |
to.p_path); |
| 247 |
else |
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errx(1, "%s is not a directory", to.p_path); |
| 249 |
} |
| 250 |
} else |
| 251 |
/* |
| 252 |
* Case (2). Target is a directory. |
| 253 |
*/ |
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type = FILE_TO_DIR; |
| 255 |
|
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exit (copy(argv, type, fts_options)); |
| 257 |
} |
| 258 |
|
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static int |
| 260 |
copy(char *argv[], enum op type, int fts_options) |
| 261 |
{ |
| 262 |
struct stat to_stat; |
| 263 |
FTS *ftsp; |
| 264 |
FTSENT *curr; |
| 265 |
int base = 0, dne, badcp, rval; |
| 266 |
size_t nlen; |
| 267 |
char *p, *target_mid; |
| 268 |
mode_t mask, mode; |
| 269 |
|
| 270 |
/* |
| 271 |
* Keep an inverted copy of the umask, for use in correcting |
| 272 |
* permissions on created directories when not using -p. |
| 273 |
*/ |
| 274 |
mask = ~umask(0777); |
| 275 |
umask(~mask); |
| 276 |
|
| 277 |
if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL) |
| 278 |
err(1, "fts_open"); |
| 279 |
for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) { |
| 280 |
switch (curr->fts_info) { |
| 281 |
case FTS_NS: |
| 282 |
case FTS_DNR: |
| 283 |
case FTS_ERR: |
| 284 |
warnx("%s: %s", |
| 285 |
curr->fts_path, strerror(curr->fts_errno)); |
| 286 |
badcp = rval = 1; |
| 287 |
continue; |
| 288 |
case FTS_DC: /* Warn, continue. */ |
| 289 |
warnx("%s: directory causes a cycle", curr->fts_path); |
| 290 |
badcp = rval = 1; |
| 291 |
continue; |
| 292 |
default: |
| 293 |
; |
| 294 |
} |
| 295 |
|
| 296 |
/* |
| 297 |
* If we are in case (2) or (3) above, we need to append the |
| 298 |
* source name to the target name. |
| 299 |
*/ |
| 300 |
if (type != FILE_TO_FILE) { |
| 301 |
/* |
| 302 |
* Need to remember the roots of traversals to create |
| 303 |
* correct pathnames. If there's a directory being |
| 304 |
* copied to a non-existent directory, e.g. |
| 305 |
* cp -R a/dir noexist |
| 306 |
* the resulting path name should be noexist/foo, not |
| 307 |
* noexist/dir/foo (where foo is a file in dir), which |
| 308 |
* is the case where the target exists. |
| 309 |
* |
| 310 |
* Also, check for "..". This is for correct path |
| 311 |
* concatenation for paths ending in "..", e.g. |
| 312 |
* cp -R .. /tmp |
| 313 |
* Paths ending in ".." are changed to ".". This is |
| 314 |
* tricky, but seems the easiest way to fix the problem. |
| 315 |
* |
| 316 |
* XXX |
| 317 |
* Since the first level MUST be FTS_ROOTLEVEL, base |
| 318 |
* is always initialized. |
| 319 |
*/ |
| 320 |
if (curr->fts_level == FTS_ROOTLEVEL) { |
| 321 |
if (type != DIR_TO_DNE) { |
| 322 |
p = strrchr(curr->fts_path, '/'); |
| 323 |
base = (p == NULL) ? 0 : |
| 324 |
(int)(p - curr->fts_path + 1); |
| 325 |
|
| 326 |
if (!strcmp(&curr->fts_path[base], |
| 327 |
"..")) |
| 328 |
base += 1; |
| 329 |
} else |
| 330 |
base = curr->fts_pathlen; |
| 331 |
} |
| 332 |
|
| 333 |
p = &curr->fts_path[base]; |
| 334 |
nlen = curr->fts_pathlen - base; |
| 335 |
target_mid = to.target_end; |
| 336 |
if (*p != '/' && target_mid[-1] != '/') |
| 337 |
*target_mid++ = '/'; |
| 338 |
*target_mid = 0; |
| 339 |
if (target_mid - to.p_path + nlen >= PATH_MAX) { |
| 340 |
warnx("%s%s: name too long (not copied)", |
| 341 |
to.p_path, p); |
| 342 |
badcp = rval = 1; |
| 343 |
continue; |
| 344 |
} |
| 345 |
(void)strncat(target_mid, p, nlen); |
| 346 |
to.p_end = target_mid + nlen; |
| 347 |
*to.p_end = 0; |
| 348 |
STRIP_TRAILING_SLASH(to); |
| 349 |
} |
| 350 |
|
| 351 |
if (curr->fts_info == FTS_DP) { |
| 352 |
/* |
| 353 |
* We are nearly finished with this directory. If we |
| 354 |
* didn't actually copy it, or otherwise don't need to |
| 355 |
* change its attributes, then we are done. |
| 356 |
*/ |
| 357 |
if (!curr->fts_number) |
| 358 |
continue; |
| 359 |
/* |
| 360 |
* If -p is in effect, set all the attributes. |
| 361 |
* Otherwise, set the correct permissions, limited |
| 362 |
* by the umask. Optimise by avoiding a chmod() |
| 363 |
* if possible (which is usually the case if we |
| 364 |
* made the directory). Note that mkdir() does not |
| 365 |
* honour setuid, setgid and sticky bits, but we |
| 366 |
* normally want to preserve them on directories. |
| 367 |
*/ |
| 368 |
if (pflag) { |
| 369 |
if (setfile(curr->fts_statp, -1)) |
| 370 |
rval = 1; |
| 371 |
if (preserve_dir_acls(curr->fts_statp, |
| 372 |
curr->fts_accpath, to.p_path) != 0) |
| 373 |
rval = 1; |
| 374 |
} else { |
| 375 |
mode = curr->fts_statp->st_mode; |
| 376 |
if ((mode & (S_ISUID | S_ISGID | S_ISTXT)) || |
| 377 |
((mode | S_IRWXU) & mask) != (mode & mask)) |
| 378 |
if (chmod(to.p_path, mode & mask) != 0){ |
| 379 |
warn("chmod: %s", to.p_path); |
| 380 |
rval = 1; |
| 381 |
} |
| 382 |
} |
| 383 |
continue; |
| 384 |
} |
| 385 |
|
| 386 |
/* Not an error but need to remember it happened */ |
| 387 |
if (stat(to.p_path, &to_stat) == -1) |
| 388 |
dne = 1; |
| 389 |
else { |
| 390 |
if (to_stat.st_dev == curr->fts_statp->st_dev && |
| 391 |
to_stat.st_ino == curr->fts_statp->st_ino) { |
| 392 |
warnx("%s and %s are identical (not copied).", |
| 393 |
to.p_path, curr->fts_path); |
| 394 |
badcp = rval = 1; |
| 395 |
if (S_ISDIR(curr->fts_statp->st_mode)) |
| 396 |
(void)fts_set(ftsp, curr, FTS_SKIP); |
| 397 |
continue; |
| 398 |
} |
| 399 |
if (!S_ISDIR(curr->fts_statp->st_mode) && |
| 400 |
S_ISDIR(to_stat.st_mode)) { |
| 401 |
warnx("cannot overwrite directory %s with " |
| 402 |
"non-directory %s", |
| 403 |
to.p_path, curr->fts_path); |
| 404 |
badcp = rval = 1; |
| 405 |
continue; |
| 406 |
} |
| 407 |
dne = 0; |
| 408 |
} |
| 409 |
|
| 410 |
switch (curr->fts_statp->st_mode & S_IFMT) { |
| 411 |
case S_IFLNK: |
| 412 |
/* Catch special case of a non-dangling symlink */ |
| 413 |
if ((fts_options & FTS_LOGICAL) || |
| 414 |
((fts_options & FTS_COMFOLLOW) && |
| 415 |
curr->fts_level == 0)) { |
| 416 |
if (copy_file(curr, dne)) |
| 417 |
badcp = rval = 1; |
| 418 |
} else { |
| 419 |
if (copy_link(curr, !dne)) |
| 420 |
badcp = rval = 1; |
| 421 |
} |
| 422 |
break; |
| 423 |
case S_IFDIR: |
| 424 |
if (!Rflag) { |
| 425 |
warnx("%s is a directory (not copied).", |
| 426 |
curr->fts_path); |
| 427 |
(void)fts_set(ftsp, curr, FTS_SKIP); |
| 428 |
badcp = rval = 1; |
| 429 |
break; |
| 430 |
} |
| 431 |
/* |
| 432 |
* If the directory doesn't exist, create the new |
| 433 |
* one with the from file mode plus owner RWX bits, |
| 434 |
* modified by the umask. Trade-off between being |
| 435 |
* able to write the directory (if from directory is |
| 436 |
* 555) and not causing a permissions race. If the |
| 437 |
* umask blocks owner writes, we fail.. |
| 438 |
*/ |
| 439 |
if (dne) { |
| 440 |
if (mkdir(to.p_path, |
| 441 |
curr->fts_statp->st_mode | S_IRWXU) < 0) |
| 442 |
err(1, "%s", to.p_path); |
| 443 |
} else if (!S_ISDIR(to_stat.st_mode)) { |
| 444 |
errno = ENOTDIR; |
| 445 |
err(1, "%s", to.p_path); |
| 446 |
} |
| 447 |
/* |
| 448 |
* Arrange to correct directory attributes later |
| 449 |
* (in the post-order phase) if this is a new |
| 450 |
* directory, or if the -p flag is in effect. |
| 451 |
*/ |
| 452 |
curr->fts_number = pflag || dne; |
| 453 |
break; |
| 454 |
case S_IFBLK: |
| 455 |
case S_IFCHR: |
| 456 |
if (Rflag) { |
| 457 |
if (copy_special(curr->fts_statp, !dne)) |
| 458 |
badcp = rval = 1; |
| 459 |
} else { |
| 460 |
if (copy_file(curr, dne)) |
| 461 |
badcp = rval = 1; |
| 462 |
} |
| 463 |
break; |
| 464 |
case S_IFSOCK: |
| 465 |
warnx("%s is a socket (not copied).", |
| 466 |
curr->fts_path); |
| 467 |
break; |
| 468 |
case S_IFIFO: |
| 469 |
if (Rflag) { |
| 470 |
if (copy_fifo(curr->fts_statp, !dne)) |
| 471 |
badcp = rval = 1; |
| 472 |
} else { |
| 473 |
if (copy_file(curr, dne)) |
| 474 |
badcp = rval = 1; |
| 475 |
} |
| 476 |
break; |
| 477 |
default: |
| 478 |
if (copy_file(curr, dne)) |
| 479 |
badcp = rval = 1; |
| 480 |
break; |
| 481 |
} |
| 482 |
if (vflag && !badcp) |
| 483 |
(void)printf("%s -> %s\n", curr->fts_path, to.p_path); |
| 484 |
} |
| 485 |
if (errno) |
| 486 |
err(1, "fts_read"); |
| 487 |
fts_close(ftsp); |
| 488 |
return (rval); |
| 489 |
} |
| 490 |
|
| 491 |
/* |
| 492 |
* mastercmp -- |
| 493 |
* The comparison function for the copy order. The order is to copy |
| 494 |
* non-directory files before directory files. The reason for this |
| 495 |
* is because files tend to be in the same cylinder group as their |
| 496 |
* parent directory, whereas directories tend not to be. Copying the |
| 497 |
* files first reduces seeking. |
| 498 |
*/ |
| 499 |
static int |
| 500 |
mastercmp(const FTSENT * const *a, const FTSENT * const *b) |
| 501 |
{ |
| 502 |
int a_info, b_info; |
| 503 |
|
| 504 |
a_info = (*a)->fts_info; |
| 505 |
if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR) |
| 506 |
return (0); |
| 507 |
b_info = (*b)->fts_info; |
| 508 |
if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR) |
| 509 |
return (0); |
| 510 |
if (a_info == FTS_D) |
| 511 |
return (-1); |
| 512 |
if (b_info == FTS_D) |
| 513 |
return (1); |
| 514 |
return (0); |
| 515 |
} |
| 516 |
|
| 517 |
static void |
| 518 |
siginfo(int sig __unused) |
| 519 |
{ |
| 520 |
|
| 521 |
info = 1; |
| 522 |
} |
