cp.c@ 229

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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
17	* 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)
27	* 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	*/
32
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: src/bin/cp/cp.c,v 1.50 2004/04/06 20:06:44 markm Exp $");
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 "cp_extern.h"
76
77	#ifndef S_IFWHT
78	#define S_IFWHT 0
79	#define S_ISWHT(s) 0
80	#define undelete(s) (-1)
81	#endif
82
83	#ifndef S_ISTXT
84	#ifdef S_ISVTX
85	#define S_ISTXT S_ISVTX
86	#else
87	#define S_ISTXT 0
88	#endif
89	#endif /* !S_ISTXT */
90
91
92	#define STRIP_TRAILING_SLASH(p) { \
93	while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \
94	*--(p).p_end = 0; \
95	}
96
97	/* have wrappers for globals in cp_extern! */
98
99	const char *cp_argv0;
100	static char emptystring[] = "";
101
102	PATH_T to = { to.p_path, emptystring, "" };
103
104	int fflag, iflag, nflag, pflag, vflag;
105	int Rflag, rflag;
106	volatile sig_atomic_t info;
107
108	enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
109
110	static int copy(char *[], enum op, int);
111	static int mastercmp(const FTSENT * const , const FTSENT const *);
112	#ifdef SIGINFO
113	static void siginfo(int __unused);
114	#endif
115
116	int
117	kmk_builtin_cp(int argc, char *argv[])
118	{
119	struct stat to_stat, tmp_stat;
120	enum op type;
121	int Hflag, Lflag, Pflag, ch, fts_options, r, have_trailing_slash;
122	char *target;
123
124	argv0 = argv[0];
125	to.p_end = to.p_path;
126	to.target_end = emptystring;
127	memset(to.p_path, 0, sizeof(to.p_path));
128	fflag = iflag = nflag = pflag = vflag = Rflag = rflag = 0;
129	info = 0;
130	opterr = 1;
131	optarg = NULL;
132	optopt = 0;
133	optind = 0; /* init */
134
135	Hflag = Lflag = Pflag = 0;
136	while ((ch = getopt(argc, argv, "HLPRfinprv")) != -1)
137	switch (ch) {
138	case 'H':
139	Hflag = 1;
140	Lflag = Pflag = 0;
141	break;
142	case 'L':
143	Lflag = 1;
144	Hflag = Pflag = 0;
145	break;
146	case 'P':
147	Pflag = 1;
148	Hflag = Lflag = 0;
149	break;
150	case 'R':
151	Rflag = 1;
152	break;
153	case 'f':
154	fflag = 1;
155	iflag = nflag = 0;
156	break;
157	case 'i':
158	iflag = 1;
159	fflag = nflag = 0;
160	break;
161	case 'n':
162	nflag = 1;
163	fflag = iflag = 0;
164	break;
165	case 'p':
166	pflag = 1;
167	break;
168	case 'r':
169	rflag = 1;
170	break;
171	case 'v':
172	vflag = 1;
173	break;
174	default:
175	usage();
176	break;
177	}
178	argc -= optind;
179	argv += optind;
180
181	if (argc < 2)
182	usage();
183
184	fts_options = FTS_NOCHDIR \| FTS_PHYSICAL;
185	if (rflag) {
186	if (Rflag) {
187	fprintf(stderr,
188	"%s: the -R and -r options may not be specified together.\n", argv0);
189	return 1;
190	}
191	if (Hflag \|\| Lflag \|\| Pflag) {
192	fprintf(stderr, "%s: the -H, -L, and -P options may not be specified with the -r option.\n", argv0);
193	return 1;
194	}
195	fts_options &= ~FTS_PHYSICAL;
196	fts_options \|= FTS_LOGICAL;
197	}
198	if (Rflag) {
199	if (Hflag)
200	fts_options \|= FTS_COMFOLLOW;
201	if (Lflag) {
202	fts_options &= ~FTS_PHYSICAL;
203	fts_options \|= FTS_LOGICAL;
204	}
205	} else {
206	fts_options &= ~FTS_PHYSICAL;
207	fts_options \|= FTS_LOGICAL \| FTS_COMFOLLOW;
208	}
209	#ifdef SIGINFO
210	(void)signal(SIGINFO, siginfo);
211	#endif
212
213	/* Save the target base in "to". */
214	target = argv[--argc];
215	if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path)) {
216	fprintf(stderr, "%s: %s: name too long\n", argv0, target);
217	return 1;
218	}
219	to.p_end = to.p_path + strlen(to.p_path);
220	if (to.p_path == to.p_end) {
221	*to.p_end++ = '.';
222	*to.p_end = 0;
223	}
224	have_trailing_slash = (to.p_end[-1] == '/');
225	if (have_trailing_slash)
226	STRIP_TRAILING_SLASH(to);
227	to.target_end = to.p_end;
228
229	/* Set end of argument list for fts(3). */
230	argv[argc] = NULL;
231
232	/*
233	* Cp has two distinct cases:
234	*
235	* cp [-R] source target
236	* cp [-R] source1 ... sourceN directory
237	*
238	* In both cases, source can be either a file or a directory.
239	*
240	* In (1), the target becomes a copy of the source. That is, if the
241	* source is a file, the target will be a file, and likewise for
242	* directories.
243	*
244	* In (2), the real target is not directory, but "directory/source".
245	*/
246	r = stat(to.p_path, &to_stat);
247	if (r == -1 && errno != ENOENT) {
248	fprintf(stderr, "%s: %s: %s\n", argv0, to.p_path, strerror(errno));
249	}
250	if (r == -1 \|\| !S_ISDIR(to_stat.st_mode)) {
251	/*
252	* Case (1). Target is not a directory.
253	*/
254	if (argc > 1) {
255	usage();
256	return 1;
257	}
258	/*
259	* Need to detect the case:
260	* cp -R dir foo
261	* Where dir is a directory and foo does not exist, where
262	* we want pathname concatenations turned on but not for
263	* the initial mkdir().
264	*/
265	if (r == -1) {
266	if (rflag \|\| (Rflag && (Lflag \|\| Hflag)))
267	stat(*argv, &tmp_stat);
268	else
269	lstat(*argv, &tmp_stat);
270
271	if (S_ISDIR(tmp_stat.st_mode) && (Rflag \|\| rflag))
272	type = DIR_TO_DNE;
273	else
274	type = FILE_TO_FILE;
275	} else
276	type = FILE_TO_FILE;
277
278	if (have_trailing_slash && type == FILE_TO_FILE) {
279	if (r == -1)
280	fprintf(stderr, "%s: directory %s does not exist\n", argv0,
281	to.p_path);
282	else
283	fprintf(stderr, "%s: %s is not a directory\n", argv0, to.p_path);
284	return 1;
285	}
286	} else
287	/*
288	* Case (2). Target is a directory.
289	*/
290	type = FILE_TO_DIR;
291
292	return copy(argv, type, fts_options);
293	}
294
295	static int
296	copy(char *argv[], enum op type, int fts_options)
297	{
298	struct stat to_stat;
299	FTS *ftsp;
300	FTSENT *curr;
301	int base = 0, dne, badcp, rval;
302	size_t nlen;
303	char p, target_mid;
304	mode_t mask, mode;
305
306	/*
307	* Keep an inverted copy of the umask, for use in correcting
308	* permissions on created directories when not using -p.
309	*/
310	mask = ~umask(0777);
311	umask(~mask);
312
313	if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL) {
314	fprintf(stderr, "%s: fts_open: %s\n", argv0, strerror(errno));
315	return 1;
316	}
317	for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
318	switch (curr->fts_info) {
319	case FTS_NS:
320	case FTS_DNR:
321	case FTS_ERR:
322	fprintf(stderr, "%s: %s: %s\n",
323	argv0, curr->fts_path, strerror(curr->fts_errno));
324	badcp = rval = 1;
325	continue;
326	case FTS_DC: /* Warn, continue. */
327	fprintf(stderr, "%s: %s: directory causes a cycle\n", argv0, curr->fts_path);
328	badcp = rval = 1;
329	continue;
330	default:
331	;
332	}
333
334	/*
335	* If we are in case (2) or (3) above, we need to append the
336	* source name to the target name.
337	*/
338	if (type != FILE_TO_FILE) {
339	/*
340	* Need to remember the roots of traversals to create
341	* correct pathnames. If there's a directory being
342	* copied to a non-existent directory, e.g.
343	* cp -R a/dir noexist
344	* the resulting path name should be noexist/foo, not
345	* noexist/dir/foo (where foo is a file in dir), which
346	* is the case where the target exists.
347	*
348	* Also, check for "..". This is for correct path
349	* concatenation for paths ending in "..", e.g.
350	* cp -R .. /tmp
351	* Paths ending in ".." are changed to ".". This is
352	* tricky, but seems the easiest way to fix the problem.
353	*
354	* XXX
355	* Since the first level MUST be FTS_ROOTLEVEL, base
356	* is always initialized.
357	*/
358	if (curr->fts_level == FTS_ROOTLEVEL) {
359	if (type != DIR_TO_DNE) {
360	p = strrchr(curr->fts_path, '/');
361	base = (p == NULL) ? 0 :
362	(int)(p - curr->fts_path + 1);
363
364	if (!strcmp(&curr->fts_path[base],
365	".."))
366	base += 1;
367	} else
368	base = curr->fts_pathlen;
369	}
370
371	p = &curr->fts_path[base];
372	nlen = curr->fts_pathlen - base;
373	target_mid = to.target_end;
374	if (*p != '/' && target_mid[-1] != '/')
375	*target_mid++ = '/';
376	*target_mid = 0;
377	if (target_mid - to.p_path + nlen >= PATH_MAX) {
378	fprintf(stderr, "%s: %s%s: name too long (not copied)\n", argv0,
379	to.p_path, p);
380	badcp = rval = 1;
381	continue;
382	}
383	(void)strncat(target_mid, p, nlen);
384	to.p_end = target_mid + nlen;
385	*to.p_end = 0;
386	STRIP_TRAILING_SLASH(to);
387	}
388
389	if (curr->fts_info == FTS_DP) {
390	/*
391	* We are nearly finished with this directory. If we
392	* didn't actually copy it, or otherwise don't need to
393	* change its attributes, then we are done.
394	*/
395	if (!curr->fts_number)
396	continue;
397	/*
398	* If -p is in effect, set all the attributes.
399	* Otherwise, set the correct permissions, limited
400	* by the umask. Optimise by avoiding a chmod()
401	* if possible (which is usually the case if we
402	* made the directory). Note that mkdir() does not
403	* honour setuid, setgid and sticky bits, but we
404	* normally want to preserve them on directories.
405	*/
406	if (pflag) {
407	if (setfile(curr->fts_statp, -1))
408	rval = 1;
409	} else {
410	mode = curr->fts_statp->st_mode;
411	if ((mode & (S_ISUID \| S_ISGID \| S_ISTXT)) \|\|
412	((mode \| S_IRWXU) & mask) != (mode & mask))
413	if (chmod(to.p_path, mode & mask) != 0){
414	fprintf(stderr, "%s: chmod: %s: %s\n", argv0, to.p_path, strerror(errno));
415	rval = 1;
416	}
417	}
418	continue;
419	}
420
421	/* Not an error but need to remember it happened */
422	if (stat(to.p_path, &to_stat) == -1)
423	dne = 1;
424	else {
425	if (to_stat.st_dev == curr->fts_statp->st_dev &&
426	to_stat.st_ino == curr->fts_statp->st_ino) {
427	fprintf(stderr, "%s: %s and %s are identical (not copied).\n",
428	argv0, to.p_path, curr->fts_path);
429	badcp = rval = 1;
430	if (S_ISDIR(curr->fts_statp->st_mode))
431	(void)fts_set(ftsp, curr, FTS_SKIP);
432	continue;
433	}
434	if (!S_ISDIR(curr->fts_statp->st_mode) &&
435	S_ISDIR(to_stat.st_mode)) {
436	fprintf(stderr,
437	"%s: cannot overwrite directory %s with "
438	"non-directory %s\n",
439	argv0, to.p_path, curr->fts_path);
440	badcp = rval = 1;
441	continue;
442	}
443	dne = 0;
444	}
445
446	switch (curr->fts_statp->st_mode & S_IFMT) {
447	case S_IFLNK:
448	/* Catch special case of a non-dangling symlink */
449	if ((fts_options & FTS_LOGICAL) \|\|
450	((fts_options & FTS_COMFOLLOW) &&
451	curr->fts_level == 0)) {
452	if (copy_file(curr, dne))
453	badcp = rval = 1;
454	} else {
455	if (copy_link(curr, !dne))
456	badcp = rval = 1;
457	}
458	break;
459	case S_IFDIR:
460	if (!Rflag && !rflag) {
461	fprintf(stderr, "%s: %s is a directory (not copied).\n",
462	argv0, curr->fts_path);
463	(void)fts_set(ftsp, curr, FTS_SKIP);
464	badcp = rval = 1;
465	break;
466	}
467	/*
468	* If the directory doesn't exist, create the new
469	* one with the from file mode plus owner RWX bits,
470	* modified by the umask. Trade-off between being
471	* able to write the directory (if from directory is
472	* 555) and not causing a permissions race. If the
473	* umask blocks owner writes, we fail..
474	*/
475	if (dne) {
476	if (mkdir(to.p_path,
477	curr->fts_statp->st_mode \| S_IRWXU) < 0) {
478	fprintf(stderr, "%s: %s: %s\n", argv0, to.p_path, strerror(errno));
479	return 1;
480	}
481	} else if (!S_ISDIR(to_stat.st_mode)) {
482	errno = ENOTDIR;
483	fprintf(stderr, "%s: %s: %s\n", argv0, to.p_path, strerror(errno));
484	}
485	/*
486	* Arrange to correct directory attributes later
487	* (in the post-order phase) if this is a new
488	* directory, or if the -p flag is in effect.
489	*/
490	curr->fts_number = pflag \|\| dne;
491	break;
492	case S_IFBLK:
493	case S_IFCHR:
494	if (Rflag) {
495	if (copy_special(curr->fts_statp, !dne))
496	badcp = rval = 1;
497	} else {
498	if (copy_file(curr, dne))
499	badcp = rval = 1;
500	}
501	break;
502	case S_IFIFO:
503	if (Rflag) {
504	if (copy_fifo(curr->fts_statp, !dne))
505	badcp = rval = 1;
506	} else {
507	if (copy_file(curr, dne))
508	badcp = rval = 1;
509	}
510	break;
511	default:
512	if (copy_file(curr, dne))
513	badcp = rval = 1;
514	break;
515	}
516	if (vflag && !badcp)
517	(void)printf("%s -> %s\n", curr->fts_path, to.p_path);
518	}
519	if (errno) {
520	fprintf(stderr, "%s: fts_read: %s\n", argv0, strerror(errno));
521	}
522	return (rval);
523	}
524
525	/*
526	* mastercmp --
527	* The comparison function for the copy order. The order is to copy
528	* non-directory files before directory files. The reason for this
529	* is because files tend to be in the same cylinder group as their
530	* parent directory, whereas directories tend not to be. Copying the
531	* files first reduces seeking.
532	*/
533	static int
534	mastercmp(const FTSENT * const a, const FTSENT const *b)
535	{
536	int a_info, b_info;
537
538	a_info = (*a)->fts_info;
539	if (a_info == FTS_ERR \|\| a_info == FTS_NS \|\| a_info == FTS_DNR)
540	return (0);
541	b_info = (*b)->fts_info;
542	if (b_info == FTS_ERR \|\| b_info == FTS_NS \|\| b_info == FTS_DNR)
543	return (0);
544	if (a_info == FTS_D)
545	return (-1);
546	if (b_info == FTS_D)
547	return (1);
548	return (0);
549	}
550
551	#ifdef SIGINFO
552	static void
553	siginfo(int sig __unused)
554	{
555
556	info = 1;
557	}
558	#endif

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source: kBuild/trunk/src/gmake/kmkbuiltin/cp.c@ 229

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