cp.c@ 557

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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	#include <sys/cdefs.h>
44	__FBSDID("$FreeBSD: src/bin/cp/cp.c,v 1.50 2004/04/06 20:06:44 markm Exp $");
45	#endif
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	#ifndef _MSC_VER
68	#include <fts.h>
69	#endif
70	#include <limits.h>
71	#include <signal.h>
72	#include <stdio.h>
73	#include <stdlib.h>
74	#include <string.h>
75	#ifndef _MSC_VER
76	#include <unistd.h>
77	#else
78	#include "mscfakes.h"
79	#include "ftsfake.h"
80	#endif
81
82	#include "cp_extern.h"
83
84	#ifndef S_IFWHT
85	#define S_IFWHT 0
86	#define S_ISWHT(s) 0
87	#define undelete(s) (-1)
88	#endif
89
90	#ifndef S_ISTXT
91	#ifdef S_ISVTX
92	#define S_ISTXT S_ISVTX
93	#else
94	#define S_ISTXT 0
95	#endif
96	#endif /* !S_ISTXT */
97
98
99	#define STRIP_TRAILING_SLASH(p) { \
100	while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \
101	*--(p).p_end = 0; \
102	}
103
104	/* have wrappers for globals in cp_extern! */
105
106	const char *cp_argv0;
107	static char emptystring[] = "";
108
109	PATH_T to = { to.p_path, emptystring, "" };
110
111	int fflag, iflag, nflag, pflag, vflag;
112	static int Rflag, rflag;
113	volatile sig_atomic_t info;
114
115	enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
116
117	static int copy(char *[], enum op, int);
118	static int mastercmp(const FTSENT * const , const FTSENT const *);
119	#ifdef SIGINFO
120	static void siginfo(int __unused);
121	#endif
122
123	int
124	kmk_builtin_cp(int argc, char *argv[])
125	{
126	struct stat to_stat, tmp_stat;
127	enum op type;
128	int Hflag, Lflag, Pflag, ch, fts_options, r, have_trailing_slash;
129	char *target;
130
131	/* init globals */
132	cp_argv0 = argv[0];
133	to.p_end = to.p_path;
134	to.target_end = emptystring;
135	memset(to.p_path, 0, sizeof(to.p_path));
136	fflag = iflag = nflag = pflag = vflag = Rflag = rflag = 0;
137	info = 0;
138
139	/* reset getopt and set progname. */
140	g_progname = argv[0];
141	opterr = 1;
142	optarg = NULL;
143	optopt = 0;
144	#if defined(__FreeBSD__) \|\| defined(__EMX__) \|\| defined(__APPLE__)
145	optreset = 1;
146	optind = 1;
147	#else
148	optind = 0; /* init */
149	#endif
150
151	Hflag = Lflag = Pflag = 0;
152	while ((ch = getopt(argc, argv, "HLPRfinprv")) != -1)
153	switch (ch) {
154	case 'H':
155	Hflag = 1;
156	Lflag = Pflag = 0;
157	break;
158	case 'L':
159	Lflag = 1;
160	Hflag = Pflag = 0;
161	break;
162	case 'P':
163	Pflag = 1;
164	Hflag = Lflag = 0;
165	break;
166	case 'R':
167	#ifdef DO_CP_TREE
168	Rflag = 1;
169	break;
170	#else
171	return errx(1, "recursive copy is not implemented!");
172	#endif
173	case 'f':
174	fflag = 1;
175	iflag = nflag = 0;
176	break;
177	case 'i':
178	iflag = 1;
179	fflag = nflag = 0;
180	break;
181	case 'n':
182	nflag = 1;
183	fflag = iflag = 0;
184	break;
185	case 'p':
186	pflag = 1;
187	break;
188	case 'r':
189	#ifdef DO_CP_TREE
190	rflag = 1;
191	break;
192	#else
193	return errx(1, "recursive copy is not implemented!");
194	#endif
195	case 'v':
196	vflag = 1;
197	break;
198	default:
199	return usage();
200	}
201	argc -= optind;
202	argv += optind;
203
204	if (argc < 2)
205	return usage();
206
207	fts_options = FTS_NOCHDIR \| FTS_PHYSICAL;
208	if (rflag) {
209	if (Rflag)
210	return errx(1,
211	"the -R and -r options may not be specified together.");
212	if (Hflag \|\| Lflag \|\| Pflag)
213	errx(1,
214	"the -H, -L, and -P options may not be specified with the -r option.");
215	#ifdef DO_CP_TREE
216	fts_options &= ~FTS_PHYSICAL;
217	fts_options \|= FTS_LOGICAL;
218	#endif
219	}
220	#ifdef DO_CP_TREE
221	if (Rflag) {
222	if (Hflag)
223	fts_options \|= FTS_COMFOLLOW;
224	if (Lflag) {
225	fts_options &= ~FTS_PHYSICAL;
226	fts_options \|= FTS_LOGICAL;
227	}
228	} else
229	#endif
230	{
231	fts_options &= ~FTS_PHYSICAL;
232	fts_options \|= FTS_LOGICAL \| FTS_COMFOLLOW;
233	}
234	#ifdef SIGINFO
235	(void)signal(SIGINFO, siginfo);
236	#endif
237
238	/* Save the target base in "to". */
239	target = argv[--argc];
240	if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
241	return errx(1, "%s: name too long", target);
242	to.p_end = to.p_path + strlen(to.p_path);
243	if (to.p_path == to.p_end) {
244	*to.p_end++ = '.';
245	*to.p_end = 0;
246	}
247	have_trailing_slash = (to.p_end[-1] == '/');
248	if (have_trailing_slash)
249	STRIP_TRAILING_SLASH(to);
250	to.target_end = to.p_end;
251
252	/* Set end of argument list for fts(3). */
253	argv[argc] = NULL;
254
255	/*
256	* Cp has two distinct cases:
257	*
258	* cp [-R] source target
259	* cp [-R] source1 ... sourceN directory
260	*
261	* In both cases, source can be either a file or a directory.
262	*
263	* In (1), the target becomes a copy of the source. That is, if the
264	* source is a file, the target will be a file, and likewise for
265	* directories.
266	*
267	* In (2), the real target is not directory, but "directory/source".
268	*/
269	r = stat(to.p_path, &to_stat);
270	if (r == -1 && errno != ENOENT)
271	return err(1, "%s", to.p_path);
272	if (r == -1 \|\| !S_ISDIR(to_stat.st_mode)) {
273	/*
274	* Case (1). Target is not a directory.
275	*/
276	if (argc > 1)
277	return usage();
278	/*
279	* Need to detect the case:
280	* cp -R dir foo
281	* Where dir is a directory and foo does not exist, where
282	* we want pathname concatenations turned on but not for
283	* the initial mkdir().
284	*/
285	if (r == -1) {
286	if (rflag \|\| (Rflag && (Lflag \|\| Hflag)))
287	stat(*argv, &tmp_stat);
288	else
289	lstat(*argv, &tmp_stat);
290
291	if (S_ISDIR(tmp_stat.st_mode) && (Rflag \|\| rflag))
292	type = DIR_TO_DNE;
293	else
294	type = FILE_TO_FILE;
295	} else
296	type = FILE_TO_FILE;
297
298	if (have_trailing_slash && type == FILE_TO_FILE) {
299	if (r == -1)
300	return errx(1, "directory %s does not exist",
301	to.p_path);
302	else
303	return errx(1, "%s is not a directory", to.p_path);
304	}
305	} else
306	/*
307	* Case (2). Target is a directory.
308	*/
309	type = FILE_TO_DIR;
310
311	return copy(argv, type, fts_options);
312	}
313
314	static int
315	copy(char *argv[], enum op type, int fts_options)
316	{
317	struct stat to_stat;
318	FTS *ftsp;
319	FTSENT *curr;
320	int base = 0, dne, badcp, rval;
321	size_t nlen;
322	char p, target_mid;
323	mode_t mask, mode;
324
325	/*
326	* Keep an inverted copy of the umask, for use in correcting
327	* permissions on created directories when not using -p.
328	*/
329	mask = ~umask(0777);
330	umask(~mask);
331
332	if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL)
333	return err(1, "fts_open");
334	for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
335	switch (curr->fts_info) {
336	case FTS_NS:
337	case FTS_DNR:
338	case FTS_ERR:
339	warnx("%s: %s",
340	curr->fts_path, strerror(curr->fts_errno));
341	badcp = rval = 1;
342	continue;
343	case FTS_DC: /* Warn, continue. */
344	warnx("%s: directory causes a cycle", curr->fts_path);
345	badcp = rval = 1;
346	continue;
347	default:
348	;
349	}
350
351	/*
352	* If we are in case (2) or (3) above, we need to append the
353	* source name to the target name.
354	*/
355	if (type != FILE_TO_FILE) {
356	/*
357	* Need to remember the roots of traversals to create
358	* correct pathnames. If there's a directory being
359	* copied to a non-existent directory, e.g.
360	* cp -R a/dir noexist
361	* the resulting path name should be noexist/foo, not
362	* noexist/dir/foo (where foo is a file in dir), which
363	* is the case where the target exists.
364	*
365	* Also, check for "..". This is for correct path
366	* concatenation for paths ending in "..", e.g.
367	* cp -R .. /tmp
368	* Paths ending in ".." are changed to ".". This is
369	* tricky, but seems the easiest way to fix the problem.
370	*
371	* XXX
372	* Since the first level MUST be FTS_ROOTLEVEL, base
373	* is always initialized.
374	*/
375	if (curr->fts_level == FTS_ROOTLEVEL) {
376	if (type != DIR_TO_DNE) {
377	p = strrchr(curr->fts_path, '/');
378	base = (p == NULL) ? 0 :
379	(int)(p - curr->fts_path + 1);
380
381	if (!strcmp(&curr->fts_path[base],
382	".."))
383	base += 1;
384	} else
385	base = curr->fts_pathlen;
386	}
387
388	p = &curr->fts_path[base];
389	nlen = curr->fts_pathlen - base;
390	target_mid = to.target_end;
391	if (*p != '/' && target_mid[-1] != '/')
392	*target_mid++ = '/';
393	*target_mid = 0;
394	if (target_mid - to.p_path + nlen >= PATH_MAX) {
395	warnx("%s%s: name too long (not copied)",
396	to.p_path, p);
397	badcp = rval = 1;
398	continue;
399	}
400	(void)strncat(target_mid, p, nlen);
401	to.p_end = target_mid + nlen;
402	*to.p_end = 0;
403	STRIP_TRAILING_SLASH(to);
404	}
405
406	if (curr->fts_info == FTS_DP) {
407	/*
408	* We are nearly finished with this directory. If we
409	* didn't actually copy it, or otherwise don't need to
410	* change its attributes, then we are done.
411	*/
412	if (!curr->fts_number)
413	continue;
414	/*
415	* If -p is in effect, set all the attributes.
416	* Otherwise, set the correct permissions, limited
417	* by the umask. Optimise by avoiding a chmod()
418	* if possible (which is usually the case if we
419	* made the directory). Note that mkdir() does not
420	* honour setuid, setgid and sticky bits, but we
421	* normally want to preserve them on directories.
422	*/
423	if (pflag) {
424	if (setfile(curr->fts_statp, -1))
425	rval = 1;
426	} else {
427	mode = curr->fts_statp->st_mode;
428	if ((mode & (S_ISUID \| S_ISGID \| S_ISTXT)) \|\|
429	((mode \| S_IRWXU) & mask) != (mode & mask))
430	if (chmod(to.p_path, mode & mask) != 0){
431	warn("chmod: %s", to.p_path);
432	rval = 1;
433	}
434	}
435	continue;
436	}
437
438	/* Not an error but need to remember it happened */
439	if (stat(to.p_path, &to_stat) == -1)
440	dne = 1;
441	else {
442	if (to_stat.st_dev == curr->fts_statp->st_dev &&
443	to_stat.st_dev != 0 &&
444	to_stat.st_ino == curr->fts_statp->st_ino &&
445	to_stat.st_ino != 0) {
446	warnx("%s and %s are identical (not copied).",
447	to.p_path, curr->fts_path);
448	badcp = rval = 1;
449	if (S_ISDIR(curr->fts_statp->st_mode))
450	(void)fts_set(ftsp, curr, FTS_SKIP);
451	continue;
452	}
453	if (!S_ISDIR(curr->fts_statp->st_mode) &&
454	S_ISDIR(to_stat.st_mode)) {
455	warnx("cannot overwrite directory %s with "
456	"non-directory %s",
457	to.p_path, curr->fts_path);
458	badcp = rval = 1;
459	continue;
460	}
461	dne = 0;
462	}
463
464	switch (curr->fts_statp->st_mode & S_IFMT) {
465	#ifdef S_IFLNK
466	case S_IFLNK:
467	/* Catch special case of a non-dangling symlink */
468	if ((fts_options & FTS_LOGICAL) \|\|
469	((fts_options & FTS_COMFOLLOW) &&
470	curr->fts_level == 0)) {
471	if (copy_file(curr, dne))
472	badcp = rval = 1;
473	} else {
474	if (copy_link(curr, !dne))
475	badcp = rval = 1;
476	}
477	break;
478	#endif
479	case S_IFDIR:
480	if (!Rflag && !rflag) {
481	warnx("%s is a directory (not copied).",
482	curr->fts_path);
483	(void)fts_set(ftsp, curr, FTS_SKIP);
484	badcp = rval = 1;
485	break;
486	}
487	/*
488	* If the directory doesn't exist, create the new
489	* one with the from file mode plus owner RWX bits,
490	* modified by the umask. Trade-off between being
491	* able to write the directory (if from directory is
492	* 555) and not causing a permissions race. If the
493	* umask blocks owner writes, we fail..
494	*/
495	if (dne) {
496	if (mkdir(to.p_path,
497	curr->fts_statp->st_mode \| S_IRWXU) < 0)
498	return err(1, "%s", to.p_path);
499	} else if (!S_ISDIR(to_stat.st_mode)) {
500	errno = ENOTDIR;
501	return err(1, "%s", to.p_path);
502	}
503	/*
504	* Arrange to correct directory attributes later
505	* (in the post-order phase) if this is a new
506	* directory, or if the -p flag is in effect.
507	*/
508	curr->fts_number = pflag \|\| dne;
509	break;
510	#ifdef S_IFBLK
511	case S_IFBLK:
512	#endif
513	case S_IFCHR:
514	if (Rflag) {
515	if (copy_special(curr->fts_statp, !dne))
516	badcp = rval = 1;
517	} else {
518	if (copy_file(curr, dne))
519	badcp = rval = 1;
520	}
521	break;
522	#ifdef S_IFIFO
523	case S_IFIFO:
524	#endif
525	if (Rflag) {
526	if (copy_fifo(curr->fts_statp, !dne))
527	badcp = rval = 1;
528	} else {
529	if (copy_file(curr, dne))
530	badcp = rval = 1;
531	}
532	break;
533	default:
534	if (copy_file(curr, dne))
535	badcp = rval = 1;
536	break;
537	}
538	if (vflag && !badcp)
539	(void)printf("%s -> %s\n", curr->fts_path, to.p_path);
540	}
541	if (errno)
542	return err(1, "fts_read");
543	return (rval);
544	}
545
546	/*
547	* mastercmp --
548	* The comparison function for the copy order. The order is to copy
549	* non-directory files before directory files. The reason for this
550	* is because files tend to be in the same cylinder group as their
551	* parent directory, whereas directories tend not to be. Copying the
552	* files first reduces seeking.
553	*/
554	static int
555	mastercmp(const FTSENT * const a, const FTSENT const *b)
556	{
557	int a_info, b_info;
558
559	a_info = (*a)->fts_info;
560	if (a_info == FTS_ERR \|\| a_info == FTS_NS \|\| a_info == FTS_DNR)
561	return (0);
562	b_info = (*b)->fts_info;
563	if (b_info == FTS_ERR \|\| b_info == FTS_NS \|\| b_info == FTS_DNR)
564	return (0);
565	if (a_info == FTS_D)
566	return (-1);
567	if (b_info == FTS_D)
568	return (1);
569	return (0);
570	}
571
572	#ifdef SIGINFO
573	static void
574	siginfo(int sig __unused)
575	{
576
577	info = 1;
578	}
579	#endif

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source: kBuild/trunk/src/gmake/kmkbuiltin/cp.c@ 557

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