Commit | Line | Data |
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1f978f4c | 1 | /* |
4d2ae24a KB |
2 | * Copyright (c) 1988 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * David Hitz of Auspex Systems Inc. | |
7 | * | |
27c71911 | 8 | * %sccs.include.redist.c% |
4d2ae24a KB |
9 | */ |
10 | ||
11 | #ifndef lint | |
12 | char copyright[] = | |
13 | "@(#) Copyright (c) 1988 The Regents of the University of California.\n\ | |
14 | All rights reserved.\n"; | |
15 | #endif /* not lint */ | |
16 | ||
17 | #ifndef lint | |
1945b3da | 18 | static char sccsid[] = "@(#)cp.c 5.23 (Berkeley) %G%"; |
4d2ae24a KB |
19 | #endif /* not lint */ |
20 | ||
21 | /* | |
22 | * cp copies source files to target files. | |
ae5e5236 | 23 | * |
9f329525 | 24 | * The global PATH_T structures "to" and "from" always contain paths to the |
4d2ae24a KB |
25 | * current source and target files, respectively. Since cp does not change |
26 | * directories, these paths can be either absolute or dot-realative. | |
ae5e5236 KB |
27 | * |
28 | * The basic algorithm is to initialize "to" and "from", and then call the | |
29 | * recursive copy() function to do the actual work. If "from" is a file, | |
30 | * copy copies the data. If "from" is a directory, copy creates the | |
31 | * corresponding "to" directory, and calls itself recursively on all of | |
32 | * the entries in the "from" directory. | |
1f978f4c KM |
33 | */ |
34 | ||
4d2ae24a | 35 | #include <sys/param.h> |
84592a94 | 36 | #include <sys/stat.h> |
0908a03a | 37 | #include <sys/time.h> |
1945b3da KB |
38 | #include <dirent.h> |
39 | #include <fcntl.h> | |
4d2ae24a | 40 | #include <errno.h> |
1945b3da KB |
41 | #include <unistd.h> |
42 | #include <stdio.h> | |
335a3e32 | 43 | #include <stdlib.h> |
6ebcb998 | 44 | #include <string.h> |
be970122 | 45 | #include "cp.h" |
ae5e5236 | 46 | |
be970122 KB |
47 | PATH_T from = { from.p_path, "" }; |
48 | PATH_T to = { to.p_path, "" }; | |
a783899b | 49 | |
1a4aed3b KB |
50 | uid_t myuid; |
51 | int exit_val, myumask; | |
3c3c3fc0 | 52 | int iflag, pflag, orflag, rflag; |
d57b5e76 | 53 | int (*statfcn)(); |
be970122 | 54 | char *buf, *progname; |
1a4aed3b | 55 | |
84592a94 | 56 | main(argc, argv) |
4d2ae24a KB |
57 | int argc; |
58 | char **argv; | |
84592a94 | 59 | { |
4bf6a19a | 60 | extern int optind; |
4d2ae24a KB |
61 | struct stat to_stat; |
62 | register int c, r; | |
335a3e32 KB |
63 | int symfollow, lstat(), stat(); |
64 | char *old_to, *p; | |
d57b5e76 KB |
65 | |
66 | /* | |
be970122 KB |
67 | * The utility cp(1) is used by mv(1) -- except for usage statements, |
68 | * print the "called as" program name. | |
d57b5e76 | 69 | */ |
be970122 | 70 | progname = (p = rindex(*argv,'/')) ? ++p : *argv; |
4d2ae24a | 71 | |
335a3e32 | 72 | symfollow = 0; |
a783899b KB |
73 | while ((c = getopt(argc, argv, "Rfhipr")) != EOF) { |
74 | switch ((char)c) { | |
75 | case 'f': | |
335a3e32 | 76 | iflag = 0; |
a783899b | 77 | break; |
0493752e KB |
78 | case 'h': |
79 | symfollow = 1; | |
80 | break; | |
4d2ae24a | 81 | case 'i': |
335a3e32 | 82 | iflag = isatty(fileno(stdin)); |
4d2ae24a KB |
83 | break; |
84 | case 'p': | |
335a3e32 | 85 | pflag = 1; |
4d2ae24a | 86 | break; |
4d2ae24a | 87 | case 'R': |
335a3e32 | 88 | rflag = 1; |
4d2ae24a | 89 | break; |
3c3c3fc0 KB |
90 | case 'r': |
91 | orflag = 1; | |
92 | break; | |
4d2ae24a KB |
93 | case '?': |
94 | default: | |
95 | usage(); | |
96 | break; | |
97 | } | |
84592a94 | 98 | } |
0493752e KB |
99 | argc -= optind; |
100 | argv += optind; | |
ae5e5236 | 101 | |
4d2ae24a KB |
102 | if (argc < 2) |
103 | usage(); | |
ae5e5236 | 104 | |
3c3c3fc0 KB |
105 | if (rflag && orflag) { |
106 | (void)fprintf(stderr, | |
107 | "cp: the -R and -r options are mutually exclusive.\n"); | |
108 | exit(1); | |
109 | } | |
110 | ||
4d2ae24a KB |
111 | buf = (char *)malloc(MAXBSIZE); |
112 | if (!buf) { | |
be970122 | 113 | (void)fprintf(stderr, "%s: out of space.\n", progname); |
4d2ae24a | 114 | exit(1); |
ae5e5236 KB |
115 | } |
116 | ||
1a4aed3b KB |
117 | myuid = getuid(); |
118 | ||
119 | /* copy the umask for explicit mode setting */ | |
120 | myumask = umask(0); | |
121 | (void)umask(myumask); | |
122 | ||
24e5a125 | 123 | /* consume last argument first. */ |
4d2ae24a | 124 | if (!path_set(&to, argv[--argc])) |
be970122 | 125 | exit(1); |
ae5e5236 | 126 | |
335a3e32 | 127 | statfcn = symfollow || !rflag ? stat : lstat; |
a68fe064 | 128 | |
ae5e5236 | 129 | /* |
4d2ae24a KB |
130 | * Cp has two distinct cases: |
131 | * | |
be970122 KB |
132 | * % cp [-rip] source target |
133 | * % cp [-rip] source1 ... directory | |
4d2ae24a KB |
134 | * |
135 | * In both cases, source can be either a file or a directory. | |
136 | * | |
137 | * In (1), the target becomes a copy of the source. That is, if the | |
138 | * source is a file, the target will be a file, and likewise for | |
139 | * directories. | |
140 | * | |
141 | * In (2), the real target is not directory, but "directory/source". | |
ae5e5236 | 142 | */ |
ae5e5236 | 143 | |
4d2ae24a KB |
144 | r = stat(to.p_path, &to_stat); |
145 | if (r == -1 && errno != ENOENT) { | |
24e5a125 | 146 | error(to.p_path); |
4d2ae24a KB |
147 | exit(1); |
148 | } | |
be970122 | 149 | if (r == -1 || !S_ISDIR(to_stat.st_mode)) { |
4d2ae24a KB |
150 | /* |
151 | * Case (1). Target is not a directory. | |
152 | */ | |
153 | if (argc > 1) { | |
154 | usage(); | |
155 | exit(1); | |
156 | } | |
157 | if (!path_set(&from, *argv)) | |
be970122 | 158 | exit(1); |
4d2ae24a KB |
159 | copy(); |
160 | } | |
161 | else { | |
162 | /* | |
163 | * Case (2). Target is a directory. | |
164 | */ | |
24e5a125 | 165 | for (;; ++argv) { |
be970122 KB |
166 | if (!path_set(&from, *argv)) { |
167 | exit_val = 1; | |
4d2ae24a | 168 | continue; |
be970122 | 169 | } |
4d2ae24a | 170 | old_to = path_append(&to, path_basename(&from), -1); |
be970122 KB |
171 | if (!old_to) { |
172 | exit_val = 1; | |
4d2ae24a | 173 | continue; |
be970122 | 174 | } |
4d2ae24a | 175 | copy(); |
24e5a125 KB |
176 | if (!--argc) |
177 | break; | |
4d2ae24a KB |
178 | path_restore(&to, old_to); |
179 | } | |
ae5e5236 | 180 | } |
4d2ae24a | 181 | exit(exit_val); |
84592a94 BJ |
182 | } |
183 | ||
a783899b | 184 | /* copy file or directory at "from" to "to". */ |
ae5e5236 | 185 | copy() |
84592a94 | 186 | { |
4d2ae24a | 187 | struct stat from_stat, to_stat; |
24e5a125 | 188 | int dne, statval; |
ae5e5236 | 189 | |
a68fe064 | 190 | statval = statfcn(from.p_path, &from_stat); |
0493752e | 191 | if (statval == -1) { |
24e5a125 | 192 | error(from.p_path); |
4d2ae24a KB |
193 | return; |
194 | } | |
0493752e KB |
195 | |
196 | /* not an error, but need to remember it happened */ | |
4d2ae24a | 197 | if (stat(to.p_path, &to_stat) == -1) |
24e5a125 KB |
198 | dne = 1; |
199 | else { | |
200 | if (to_stat.st_dev == from_stat.st_dev && | |
201 | to_stat.st_ino == from_stat.st_ino) { | |
202 | (void)fprintf(stderr, | |
d57b5e76 | 203 | "%s: %s and %s are identical (not copied).\n", |
be970122 | 204 | progname, to.p_path, from.p_path); |
24e5a125 KB |
205 | exit_val = 1; |
206 | return; | |
207 | } | |
208 | dne = 0; | |
84592a94 | 209 | } |
ae5e5236 | 210 | |
be970122 | 211 | switch(from_stat.st_mode & S_IFMT) { |
a783899b | 212 | case S_IFLNK: |
24e5a125 | 213 | copy_link(!dne); |
0493752e | 214 | return; |
a783899b | 215 | case S_IFDIR: |
3c3c3fc0 | 216 | if (!rflag && !orflag) { |
4d2ae24a | 217 | (void)fprintf(stderr, |
d57b5e76 | 218 | "%s: %s is a directory (not copied).\n", |
be970122 | 219 | progname, from.p_path); |
4d2ae24a KB |
220 | exit_val = 1; |
221 | return; | |
222 | } | |
24e5a125 KB |
223 | if (dne) { |
224 | /* | |
225 | * If the directory doesn't exist, create the new | |
226 | * one with the from file mode plus owner RWX bits, | |
227 | * modified by the umask. Trade-off between being | |
228 | * able to write the directory (if from directory is | |
229 | * 555) and not causing a permissions race. If the | |
230 | * umask blocks owner writes cp fails. | |
231 | */ | |
232 | if (mkdir(to.p_path, from_stat.st_mode|S_IRWXU) < 0) { | |
233 | error(to.p_path); | |
4d2ae24a KB |
234 | return; |
235 | } | |
4d2ae24a | 236 | } |
be970122 | 237 | else if (!S_ISDIR(to_stat.st_mode) != S_IFDIR) { |
d57b5e76 | 238 | (void)fprintf(stderr, "%s: %s: not a directory.\n", |
be970122 | 239 | progname, to.p_path); |
4d2ae24a KB |
240 | return; |
241 | } | |
242 | copy_dir(); | |
24e5a125 | 243 | /* |
9ac69c84 KB |
244 | * If not -p and directory didn't exist, set it to be the |
245 | * same as the from directory, umodified by the umask; | |
246 | * arguably wrong, but it's been that way forever. | |
24e5a125 | 247 | */ |
335a3e32 | 248 | if (pflag) |
9ac69c84 KB |
249 | setfile(&from_stat, 0); |
250 | else if (dne) | |
24e5a125 | 251 | (void)chmod(to.p_path, from_stat.st_mode); |
3c3c3fc0 | 252 | return; |
a783899b KB |
253 | case S_IFCHR: |
254 | case S_IFBLK: | |
335a3e32 | 255 | if (rflag) { |
3c66b1ab | 256 | copy_special(&from_stat, !dne); |
a783899b KB |
257 | return; |
258 | } | |
3c3c3fc0 KB |
259 | break; |
260 | case S_IFIFO: | |
261 | if (rflag) { | |
262 | copy_fifo(&from_stat, !dne); | |
263 | return; | |
264 | } | |
265 | break; | |
5f89032b | 266 | } |
3c3c3fc0 | 267 | copy_file(&from_stat, dne); |
ae5e5236 KB |
268 | } |
269 | ||
1a4aed3b | 270 | copy_file(fs, dne) |
24e5a125 | 271 | struct stat *fs; |
1a4aed3b | 272 | int dne; |
ae5e5236 | 273 | { |
a783899b | 274 | register int from_fd, to_fd, rcount, wcount; |
1a4aed3b | 275 | struct stat to_stat; |
4d2ae24a | 276 | |
24e5a125 KB |
277 | if ((from_fd = open(from.p_path, O_RDONLY, 0)) == -1) { |
278 | error(from.p_path); | |
279 | return; | |
4d2ae24a KB |
280 | } |
281 | ||
282 | /* | |
1a4aed3b KB |
283 | * If the file exists and we're interactive, verify with the user. |
284 | * If the file DNE, set the mode to be the from file, minus setuid | |
285 | * bits, modified by the umask; arguably wrong, but it makes copying | |
286 | * executables work right and it's been that way forever. (The | |
287 | * other choice is 666 or'ed with the execute bits on the from file | |
288 | * modified by the umask.) | |
4d2ae24a | 289 | */ |
1a4aed3b | 290 | if (!dne) { |
335a3e32 | 291 | if (iflag) { |
1a4aed3b KB |
292 | int checkch, ch; |
293 | ||
294 | (void)fprintf(stderr, "overwrite %s? ", to.p_path); | |
295 | checkch = ch = getchar(); | |
296 | while (ch != '\n' && ch != EOF) | |
297 | ch = getchar(); | |
298 | if (checkch != 'y') { | |
299 | (void)close(from_fd); | |
300 | return; | |
301 | } | |
302 | } | |
303 | to_fd = open(to.p_path, O_WRONLY|O_TRUNC, 0); | |
304 | } else | |
305 | to_fd = open(to.p_path, O_WRONLY|O_CREAT|O_TRUNC, | |
306 | fs->st_mode & ~(S_ISUID|S_ISGID)); | |
ae5e5236 | 307 | |
4d2ae24a | 308 | if (to_fd == -1) { |
24e5a125 | 309 | error(to.p_path); |
4d2ae24a | 310 | (void)close(from_fd); |
24e5a125 | 311 | return; |
ae5e5236 KB |
312 | } |
313 | ||
4d2ae24a KB |
314 | while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) { |
315 | wcount = write(to_fd, buf, rcount); | |
316 | if (rcount != wcount || wcount == -1) { | |
24e5a125 | 317 | error(to.p_path); |
4d2ae24a KB |
318 | break; |
319 | } | |
ae5e5236 | 320 | } |
24e5a125 KB |
321 | if (rcount < 0) |
322 | error(from.p_path); | |
335a3e32 | 323 | if (pflag) |
24e5a125 | 324 | setfile(fs, to_fd); |
1a4aed3b | 325 | /* |
3c3c3fc0 KB |
326 | * If the source was setuid or setgid, lose the bits unless the |
327 | * copy is owned by the same user and group. | |
1a4aed3b | 328 | */ |
3c3c3fc0 KB |
329 | else if (fs->st_mode & (S_ISUID|S_ISGID) && fs->st_uid == myuid) |
330 | if (fstat(to_fd, &to_stat)) | |
331 | error(to.p_path); | |
332 | #define RETAINBITS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO) | |
333 | else if (fs->st_gid == to_stat.st_gid && fchmod(to_fd, | |
334 | fs->st_mode & RETAINBITS & ~myumask)) | |
1a4aed3b | 335 | error(to.p_path); |
4d2ae24a KB |
336 | (void)close(from_fd); |
337 | (void)close(to_fd); | |
4d2ae24a | 338 | } |
ae5e5236 | 339 | |
4d2ae24a KB |
340 | copy_dir() |
341 | { | |
342 | struct stat from_stat; | |
1945b3da | 343 | struct dirent *dp, **dir_list; |
24e5a125 KB |
344 | register int dir_cnt, i; |
345 | char *old_from, *old_to; | |
4d2ae24a KB |
346 | |
347 | dir_cnt = scandir(from.p_path, &dir_list, NULL, NULL); | |
348 | if (dir_cnt == -1) { | |
d57b5e76 | 349 | (void)fprintf(stderr, "%s: can't read directory %s.\n", |
be970122 | 350 | progname, from.p_path); |
4d2ae24a | 351 | exit_val = 1; |
ae5e5236 KB |
352 | } |
353 | ||
24e5a125 KB |
354 | /* |
355 | * Instead of handling directory entries in the order they appear | |
356 | * on disk, do non-directory files before directory files. | |
357 | * There are two reasons to do directories last. The first is | |
358 | * efficiency. Files tend to be in the same cylinder group as | |
359 | * their parent, whereas directories tend not to be. Copying files | |
360 | * all at once reduces seeking. Second, deeply nested tree's | |
361 | * could use up all the file descriptors if we didn't close one | |
362 | * directory before recursivly starting on the next. | |
363 | */ | |
364 | /* copy files */ | |
4d2ae24a KB |
365 | for (i = 0; i < dir_cnt; ++i) { |
366 | dp = dir_list[i]; | |
367 | if (dp->d_namlen <= 2 && dp->d_name[0] == '.' | |
24e5a125 KB |
368 | && (dp->d_name[1] == NULL || dp->d_name[1] == '.')) |
369 | goto done; | |
4d2ae24a | 370 | old_from = path_append(&from, dp->d_name, (int)dp->d_namlen); |
be970122 KB |
371 | if (!old_from) { |
372 | exit_val = 1; | |
24e5a125 | 373 | goto done; |
be970122 | 374 | } |
4d2ae24a | 375 | |
a68fe064 | 376 | if (statfcn(from.p_path, &from_stat) < 0) { |
24e5a125 KB |
377 | error(dp->d_name); |
378 | path_restore(&from, old_from); | |
379 | goto done; | |
380 | } | |
be970122 | 381 | if (S_ISDIR(from_stat.st_mode)) { |
4d2ae24a KB |
382 | path_restore(&from, old_from); |
383 | continue; | |
384 | } | |
24e5a125 KB |
385 | old_to = path_append(&to, dp->d_name, (int)dp->d_namlen); |
386 | if (old_to) { | |
4d2ae24a KB |
387 | copy(); |
388 | path_restore(&to, old_to); | |
be970122 KB |
389 | } else |
390 | exit_val = 1; | |
4d2ae24a | 391 | path_restore(&from, old_from); |
24e5a125 | 392 | done: dir_list[i] = NULL; |
335a3e32 | 393 | (void)free((void *)dp); |
5f89032b | 394 | } |
ae5e5236 | 395 | |
24e5a125 | 396 | /* copy directories */ |
4d2ae24a KB |
397 | for (i = 0; i < dir_cnt; ++i) { |
398 | dp = dir_list[i]; | |
399 | if (!dp) | |
400 | continue; | |
401 | old_from = path_append(&from, dp->d_name, (int) dp->d_namlen); | |
402 | if (!old_from) { | |
be970122 | 403 | exit_val = 1; |
335a3e32 | 404 | (void)free((void *)dp); |
4d2ae24a KB |
405 | continue; |
406 | } | |
407 | old_to = path_append(&to, dp->d_name, (int) dp->d_namlen); | |
408 | if (!old_to) { | |
be970122 | 409 | exit_val = 1; |
335a3e32 | 410 | (void)free((void *)dp); |
4d2ae24a KB |
411 | path_restore(&from, old_from); |
412 | continue; | |
413 | } | |
414 | copy(); | |
335a3e32 | 415 | free((void *)dp); |
4d2ae24a KB |
416 | path_restore(&from, old_from); |
417 | path_restore(&to, old_to); | |
5f89032b | 418 | } |
335a3e32 | 419 | free((void *)dir_list); |
5f89032b | 420 | } |
1a4b831f | 421 | |
0493752e KB |
422 | copy_link(exists) |
423 | int exists; | |
424 | { | |
14dc7750 | 425 | int len; |
0493752e KB |
426 | char link[MAXPATHLEN]; |
427 | ||
14dc7750 | 428 | if ((len = readlink(from.p_path, link, sizeof(link))) == -1) { |
24e5a125 | 429 | error(from.p_path); |
0493752e KB |
430 | return; |
431 | } | |
14dc7750 | 432 | link[len] = '\0'; |
0493752e | 433 | if (exists && unlink(to.p_path)) { |
24e5a125 | 434 | error(to.p_path); |
0493752e KB |
435 | return; |
436 | } | |
437 | if (symlink(link, to.p_path)) { | |
24e5a125 | 438 | error(link); |
0493752e KB |
439 | return; |
440 | } | |
441 | } | |
442 | ||
3c3c3fc0 KB |
443 | copy_fifo(from_stat, exists) |
444 | struct stat *from_stat; | |
445 | int exists; | |
446 | { | |
447 | if (exists && unlink(to.p_path)) { | |
448 | error(to.p_path); | |
449 | return; | |
450 | } | |
451 | if (mkfifo(to.p_path, from_stat->st_mode)) { | |
452 | error(to.p_path); | |
453 | return; | |
454 | } | |
455 | if (pflag) | |
456 | setfile(from_stat, 0); | |
457 | } | |
458 | ||
3c66b1ab KB |
459 | copy_special(from_stat, exists) |
460 | struct stat *from_stat; | |
461 | int exists; | |
a783899b | 462 | { |
3c66b1ab | 463 | if (exists && unlink(to.p_path)) { |
24e5a125 | 464 | error(to.p_path); |
a783899b KB |
465 | return; |
466 | } | |
467 | if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) { | |
24e5a125 | 468 | error(to.p_path); |
a783899b KB |
469 | return; |
470 | } | |
3c3c3fc0 KB |
471 | if (pflag) |
472 | setfile(from_stat, 0); | |
a783899b KB |
473 | } |
474 | ||
24e5a125 KB |
475 | setfile(fs, fd) |
476 | register struct stat *fs; | |
477 | int fd; | |
a783899b KB |
478 | { |
479 | static struct timeval tv[2]; | |
12c865aa | 480 | char path[100]; |
a783899b | 481 | |
3ca1480b KB |
482 | fs->st_mode &= S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO; |
483 | ||
a783899b KB |
484 | tv[0].tv_sec = fs->st_atime; |
485 | tv[1].tv_sec = fs->st_mtime; | |
12c865aa KB |
486 | if (utimes(to.p_path, tv)) { |
487 | (void)snprintf(path, sizeof(path), "utimes: %s", to.p_path); | |
488 | error(path); | |
489 | } | |
24e5a125 | 490 | /* |
c942f008 | 491 | * Changing the ownership probably won't succeed, unless we're root |
3ca1480b KB |
492 | * or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting |
493 | * the mode; current BSD behavior is to remove all setuid bits on | |
494 | * chown. If chown fails, lose setuid/setgid bits. | |
24e5a125 | 495 | */ |
3ca1480b KB |
496 | if (fd ? fchown(fd, fs->st_uid, fs->st_gid) : |
497 | chown(to.p_path, fs->st_uid, fs->st_gid)) { | |
12c865aa KB |
498 | if (errno != EPERM) { |
499 | (void)snprintf(path, sizeof(path), | |
500 | "chown: %s", to.p_path); | |
501 | error(path); | |
502 | } | |
3ca1480b | 503 | fs->st_mode &= ~(S_ISUID|S_ISGID); |
1a4aed3b | 504 | } |
12c865aa KB |
505 | if (fd ? fchmod(fd, fs->st_mode) : chmod(to.p_path, fs->st_mode)) { |
506 | (void)snprintf(path, sizeof(path), "chown: %s", to.p_path); | |
507 | error(path); | |
508 | } | |
1a4aed3b KB |
509 | } |
510 | ||
24e5a125 KB |
511 | error(s) |
512 | char *s; | |
0908a03a | 513 | { |
4d2ae24a | 514 | exit_val = 1; |
be970122 | 515 | (void)fprintf(stderr, "%s: %s: %s\n", progname, s, strerror(errno)); |
4d2ae24a | 516 | } |
1a4b831f | 517 | |
4d2ae24a KB |
518 | usage() |
519 | { | |
520 | (void)fprintf(stderr, | |
3c3c3fc0 | 521 | "usage: cp [-Rfhip] src target;\n or: cp [-Rfhip] src1 ... srcN directory\n"); |
4d2ae24a | 522 | exit(1); |
1a4b831f | 523 | } |