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source: rtems/cpukit/libmisc/shell/main_cp.c @ 308bb9b

4.115

Last change on this file since 308bb9b was 308bb9b, checked in by Joel Sherrill <joel.sherrill@…>, on 10/12/14 at 21:09:20
shell/main_cp.c: Delete unused -rtems_shell_cp_exit()
Property mode set to `100644`
File size: 14.8 KB

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1	/* $NetBSD: cp.c,v 1.39 2005/10/24 12:59:07 kleink Exp $ */
2
3	/*
4	* Copyright (c) 1988, 1993, 1994
5	* The Regents of the University of California. All rights reserved.
6	*
7	* This code is derived from software contributed to Berkeley by
8	* David Hitz of Auspex Systems Inc.
9	*
10	* Redistribution and use in source and binary forms, with or without
11	* modification, are permitted provided that the following conditions
12	* are met:
13	* 1. Redistributions of source code must retain the above copyright
14	* notice, this list of conditions and the following disclaimer.
15	* 2. Redistributions in binary form must reproduce the above copyright
16	* notice, this list of conditions and the following disclaimer in the
17	* documentation and/or other materials provided with the distribution.
18	* 3. Neither the name of the University nor the names of its contributors
19	* may be used to endorse or promote products derived from this software
20	* without specific prior written permission.
21	*
22	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32	* SUCH DAMAGE.
33	*/
34
35	#ifdef HAVE_CONFIG_H
36	#include "config.h"
37	#endif
38
39	#if 0
40	#ifndef lint
41	__COPYRIGHT(
42	"@(#) Copyright (c) 1988, 1993, 1994\n\
43	The Regents of the University of California. All rights reserved.\n");
44	#endif /* not lint */
45
46	#ifndef lint
47	#if 0
48	static char sccsid[] = "@(#)cp.c 8.5 (Berkeley) 4/29/95";
49	#else
50	__RCSID("$NetBSD: cp.c,v 1.39 2005/10/24 12:59:07 kleink Exp $");
51	#endif
52	#endif /* not lint */
53	#endif
54	/*
55	* Cp copies source files to target files.
56	*
57	* The global PATH_T structure "to" always contains the path to the
58	* current target file. Since fts(3) does not change directories,
59	* this path can be either absolute or dot-relative.
60	*
61	* The basic algorithm is to initialize "to" and use fts(3) to traverse
62	* the file hierarchy rooted in the argument list. A trivial case is the
63	* case of 'cp file1 file2'. The more interesting case is the case of
64	* 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the
65	* path (relative to the root of the traversal) is appended to dir (stored
66	* in "to") to form the final target path.
67	*/
68
69	#include <rtems.h>
70	#include <rtems/shell.h>
71	#include <rtems/shellconfig.h>
72	#define __need_getopt_newlib
73	#include <getopt.h>
74
75	#include <sys/param.h>
76	#include <sys/stat.h>
77
78	#include <err.h>
79	#include <errno.h>
80	#include <fts.h>
81	#include <limits.h>
82	#include <signal.h>
83	#include <stdio.h>
84	#include <stdlib.h>
85	#include <string.h>
86	#include <unistd.h>
87
88	#include "internal.h"
89
90	#include "extern-cp.h"
91
92	#define S_ISTXT 0
93
94	#define STRIP_TRAILING_SLASH(p) { \
95	while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \
96	*--(p).p_end = 0; \
97	}
98
99	enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE };
100
101	static int Rflag, rflag;
102
103	static int main_cp(rtems_shell_cp_globals* cp_globals, int, char *[]);
104	static int copy(rtems_shell_cp_globals* cp_globals, char *[], enum op, int);
105	static int mastercmp(const FTSENT , const FTSENT );
106
107	int
108	rtems_shell_main_cp(int argc, char *argv[])
109	{
110	rtems_shell_cp_globals cp_globals;
111	memset (&cp_globals, 0, sizeof (cp_globals));
112	Rflag = rflag = 0;
113	if (setjmp (cp_globals.exit_jmp) == 0)
114	return main_cp (&cp_globals, argc, argv);
115	return 1;
116	}
117
118	int
119	main_cp(rtems_shell_cp_globals* cp_globals, int argc, char *argv[])
120	{
121	struct stat to_stat, tmp_stat;
122	enum op type;
123	int Hflag, Lflag, Pflag, ch, fts_options, r, have_trailing_slash;
124	char *target;
125	struct getopt_data getopt_reent;
126
127	Hflag = Lflag = Pflag = 0;
128	memset(&getopt_reent, 0, sizeof(getopt_data));
129
130	while ((ch = getopt_r(argc, argv, "HLPRafilnprv", &getopt_reent)) != -1)
131	switch (ch) {
132	case 'H':
133	Hflag = 1;
134	Lflag = Pflag = 0;
135	break;
136	case 'L':
137	Lflag = 1;
138	Hflag = Pflag = 0;
139	break;
140	case 'P':
141	Pflag = 1;
142	Hflag = Lflag = 0;
143	break;
144	case 'R':
145	Rflag = 1;
146	break;
147	case 'a':
148	Pflag = 1;
149	pflag = 1;
150	Rflag = 1;
151	Hflag = Lflag = 0;
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 'l':
162	lflag = 1;
163	break;
164	case 'n':
165	nflag = 1;
166	fflag = iflag = 0;
167	break;
168	case 'p':
169	pflag = 1;
170	break;
171	case 'r':
172	rflag = Lflag = 1;
173	Hflag = Pflag = 0;
174	break;
175	case 'v':
176	vflag = 1;
177	break;
178	default:
179	usage(cp_globals);
180	break;
181	}
182	argc -= getopt_reent.optind;
183	argv += getopt_reent.optind;
184
185	if (argc < 2)
186	usage(cp_globals);
187
188	fts_options = FTS_NOCHDIR \| FTS_PHYSICAL;
189	if (Rflag && rflag)
190	errx(exit_jump, 1, "the -R and -r options may not be specified together");
191	if (rflag)
192	Rflag = 1;
193	if (Rflag) {
194	if (Hflag)
195	fts_options \|= FTS_COMFOLLOW;
196	if (Lflag) {
197	fts_options &= ~FTS_PHYSICAL;
198	fts_options \|= FTS_LOGICAL;
199	}
200	} else {
201	fts_options &= ~FTS_PHYSICAL;
202	fts_options \|= FTS_LOGICAL \| FTS_COMFOLLOW;
203	}
204	#if 0
205	(void)signal(SIGINFO, siginfo);
206	#endif
207
208	/* Save the target base in "to". */
209	target = argv[--argc];
210	if (strlcpy(to.p_path, target, sizeof(to.p_path)) >= sizeof(to.p_path))
211	errx(exit_jump, 1, "%s: name too long", target);
212	to.p_end = to.p_path + strlen(to.p_path);
213	if (to.p_path == to.p_end) {
214	*to.p_end++ = '.';
215	*to.p_end = 0;
216	}
217	have_trailing_slash = (to.p_end[-1] == '/');
218	if (have_trailing_slash)
219	STRIP_TRAILING_SLASH(to);
220	to.target_end = to.p_end;
221
222	/* Set end of argument list for fts(3). */
223	argv[argc] = NULL;
224
225	/*
226	* Cp has two distinct cases:
227	*
228	* cp [-R] source target
229	* cp [-R] source1 ... sourceN directory
230	*
231	* In both cases, source can be either a file or a directory.
232	*
233	* In (1), the target becomes a copy of the source. That is, if the
234	* source is a file, the target will be a file, and likewise for
235	* directories.
236	*
237	* In (2), the real target is not directory, but "directory/source".
238	*/
239	r = stat(to.p_path, &to_stat);
240	if (r == -1 && errno != ENOENT)
241	err(exit_jump, 1, "%s", to.p_path);
242	if (r == -1 \|\| !S_ISDIR(to_stat.st_mode)) {
243	/*
244	* Case (1). Target is not a directory.
245	*/
246	if (argc > 1)
247	errx(exit_jump, 1, "%s is not a directory", to.p_path);
248
249	/*
250	* Need to detect the case:
251	* cp -R dir foo
252	* Where dir is a directory and foo does not exist, where
253	* we want pathname concatenations turned on but not for
254	* the initial mkdir().
255	*/
256	if (r == -1) {
257	if (Rflag && (Lflag \|\| Hflag))
258	stat(*argv, &tmp_stat);
259	else
260	lstat(*argv, &tmp_stat);
261
262	if (S_ISDIR(tmp_stat.st_mode) && Rflag)
263	type = DIR_TO_DNE;
264	else
265	type = FILE_TO_FILE;
266	} else
267	type = FILE_TO_FILE;
268
269	if (have_trailing_slash && type == FILE_TO_FILE) {
270	if (r == -1)
271	errx(exit_jump, 1, "directory %s does not exist",
272	to.p_path);
273	else
274	errx(exit_jump, 1, "%s is not a directory", to.p_path);
275	}
276	} else
277	/*
278	* Case (2). Target is a directory.
279	*/
280	type = FILE_TO_DIR;
281
282	return copy(cp_globals, argv, type, fts_options);
283	}
284
285	int
286	copy(rtems_shell_cp_globals* cp_globals,
287	char *argv[], enum op type, int fts_options)
288	{
289	struct stat to_stat;
290	FTS *ftsp;
291	FTSENT *curr;
292	int base = 0, dne, badcp, rval;
293	size_t nlen;
294	char p, target_mid;
295	mode_t mask, mode;
296
297	/*
298	* Keep an inverted copy of the umask, for use in correcting
299	* permissions on created directories when not using -p.
300	*/
301	mask = ~umask(0777);
302	umask(~mask);
303
304	if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL)
305	err(exit_jump, 1, "fts_open");
306	for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) {
307	switch (curr->fts_info) {
308	case FTS_NS:
309	case FTS_DNR:
310	case FTS_ERR:
311	warnx("%s: %s",
312	curr->fts_path, strerror(curr->fts_errno));
313	badcp = rval = 1;
314	continue;
315	case FTS_DC: /* Warn, continue. */
316	warnx("%s: directory causes a cycle", curr->fts_path);
317	badcp = rval = 1;
318	continue;
319	default:
320	;
321	}
322
323	/*
324	* If we are in case (2) or (3) above, we need to append the
325	* source name to the target name.
326	*/
327	if (type != FILE_TO_FILE) {
328	/*
329	* Need to remember the roots of traversals to create
330	* correct pathnames. If there's a directory being
331	* copied to a non-existent directory, e.g.
332	* cp -R a/dir noexist
333	* the resulting path name should be noexist/foo, not
334	* noexist/dir/foo (where foo is a file in dir), which
335	* is the case where the target exists.
336	*
337	* Also, check for "..". This is for correct path
338	* concatenation for paths ending in "..", e.g.
339	* cp -R .. /tmp
340	* Paths ending in ".." are changed to ".". This is
341	* tricky, but seems the easiest way to fix the problem.
342	*
343	* XXX
344	* Since the first level MUST be FTS_ROOTLEVEL, base
345	* is always initialized.
346	*/
347	if (curr->fts_level == FTS_ROOTLEVEL) {
348	if (type != DIR_TO_DNE) {
349	p = strrchr(curr->fts_path, '/');
350	base = (p == NULL) ? 0 :
351	(int)(p - curr->fts_path + 1);
352
353	if (!strcmp(&curr->fts_path[base],
354	".."))
355	base += 1;
356	} else
357	base = curr->fts_pathlen;
358	}
359
360	p = &curr->fts_path[base];
361	nlen = curr->fts_pathlen - base;
362	target_mid = to.target_end;
363	if (*p != '/' && target_mid[-1] != '/')
364	*target_mid++ = '/';
365	*target_mid = 0;
366	if (target_mid - to.p_path + nlen >= PATH_MAX) {
367	warnx("%s%s: name too long (not copied)",
368	to.p_path, p);
369	badcp = rval = 1;
370	continue;
371	}
372	(void)strncat(target_mid, p, nlen);
373	to.p_end = target_mid + nlen;
374	*to.p_end = 0;
375	STRIP_TRAILING_SLASH(to);
376	}
377
378	if (curr->fts_info == FTS_DP) {
379	/*
380	* We are nearly finished with this directory. If we
381	* didn't actually copy it, or otherwise don't need to
382	* change its attributes, then we are done.
383	*/
384	if (!curr->fts_number)
385	continue;
386	/*
387	* If -p is in effect, set all the attributes.
388	* Otherwise, set the correct permissions, limited
389	* by the umask. Optimise by avoiding a chmod()
390	* if possible (which is usually the case if we
391	* made the directory). Note that mkdir() does not
392	* honour setuid, setgid and sticky bits, but we
393	* normally want to preserve them on directories.
394	*/
395	if (pflag) {
396	if (setfile(cp_globals, curr->fts_statp, -1))
397	rval = 1;
398	if (preserve_dir_acls(curr->fts_statp,
399	curr->fts_accpath, to.p_path) != 0)
400	rval = 1;
401	} else {
402	mode = curr->fts_statp->st_mode;
403	if ((mode & (S_ISUID \| S_ISGID \| S_ISTXT)) \|\|
404	((mode \| S_IRWXU) & mask) != (mode & mask))
405	if (chmod(to.p_path, mode & mask) != 0){
406	warn("chmod: %s", to.p_path);
407	rval = 1;
408	}
409	}
410	continue;
411	}
412
413	/* Not an error but need to remember it happened */
414	if (stat(to.p_path, &to_stat) == -1)
415	dne = 1;
416	else {
417	if (to_stat.st_dev == curr->fts_statp->st_dev &&
418	to_stat.st_ino == curr->fts_statp->st_ino) {
419	warnx("%s and %s are identical (not copied).",
420	to.p_path, curr->fts_path);
421	badcp = rval = 1;
422	if (S_ISDIR(curr->fts_statp->st_mode))
423	(void)fts_set(ftsp, curr, FTS_SKIP);
424	continue;
425	}
426	if (!S_ISDIR(curr->fts_statp->st_mode) &&
427	S_ISDIR(to_stat.st_mode)) {
428	warnx("cannot overwrite directory %s with "
429	"non-directory %s",
430	to.p_path, curr->fts_path);
431	badcp = rval = 1;
432	continue;
433	}
434	dne = 0;
435	}
436
437	switch (curr->fts_statp->st_mode & S_IFMT) {
438	case S_IFLNK:
439	/* Catch special case of a non-dangling symlink */
440	if ((fts_options & FTS_LOGICAL) \|\|
441	((fts_options & FTS_COMFOLLOW) &&
442	curr->fts_level == 0)) {
443	if (copy_file(cp_globals, curr, dne))
444	badcp = rval = 1;
445	} else {
446	if (copy_link(cp_globals, curr, !dne))
447	badcp = rval = 1;
448	}
449	break;
450	case S_IFDIR:
451	if (!Rflag) {
452	warnx("%s is a directory (not copied).",
453	curr->fts_path);
454	(void)fts_set(ftsp, curr, FTS_SKIP);
455	badcp = rval = 1;
456	break;
457	}
458	/*
459	* If the directory doesn't exist, create the new
460	* one with the from file mode plus owner RWX bits,
461	* modified by the umask. Trade-off between being
462	* able to write the directory (if from directory is
463	* 555) and not causing a permissions race. If the
464	* umask blocks owner writes, we fail..
465	*/
466	if (dne) {
467	if (mkdir(to.p_path,
468	curr->fts_statp->st_mode \| S_IRWXU) < 0)
469	err(exit_jump, 1, "%s", to.p_path);
470	} else if (!S_ISDIR(to_stat.st_mode)) {
471	errno = ENOTDIR;
472	err(exit_jump, 1, "%s", to.p_path);
473	}
474	/*
475	* Arrange to correct directory attributes later
476	* (in the post-order phase) if this is a new
477	* directory, or if the -p flag is in effect.
478	*/
479	curr->fts_number = pflag \|\| dne;
480	break;
481	case S_IFBLK:
482	case S_IFCHR:
483	if (Rflag) {
484	if (copy_special(cp_globals, curr->fts_statp, !dne))
485	badcp = rval = 1;
486	} else {
487	if (copy_file(cp_globals, curr, dne))
488	badcp = rval = 1;
489	}
490	break;
491	case S_IFSOCK:
492	warnx("%s is a socket (not copied).",
493	curr->fts_path);
494	case S_IFIFO:
495	if (Rflag) {
496	if (copy_fifo(cp_globals, curr->fts_statp, !dne))
497	badcp = rval = 1;
498	} else {
499	if (copy_file(cp_globals, curr, dne))
500	badcp = rval = 1;
501	}
502	break;
503	default:
504	if (copy_file(cp_globals, curr, dne))
505	badcp = rval = 1;
506	break;
507	}
508	if (vflag && !badcp)
509	(void)printf("%s -> %s\n", curr->fts_path, to.p_path);
510	}
511	if (errno)
512	err(exit_jump, 1, "fts_read");
513	fts_close(ftsp);
514	return (rval);
515	}
516
517	/*
518	* mastercmp --
519	* The comparison function for the copy order. The order is to copy
520	* non-directory files before directory files. The reason for this
521	* is because files tend to be in the same cylinder group as their
522	* parent directory, whereas directories tend not to be. Copying the
523	* files first reduces seeking.
524	*/
525	int
526	mastercmp(const FTSENT a, const FTSENT b)
527	{
528	int a_info, b_info;
529
530	a_info = (*a)->fts_info;
531	if (a_info == FTS_ERR \|\| a_info == FTS_NS \|\| a_info == FTS_DNR)
532	return (0);
533	b_info = (*b)->fts_info;
534	if (b_info == FTS_ERR \|\| b_info == FTS_NS \|\| b_info == FTS_DNR)
535	return (0);
536	if (a_info == FTS_D)
537	return (-1);
538	if (b_info == FTS_D)
539	return (1);
540	return (0);
541	}
542
543	rtems_shell_cmd_t rtems_shell_CP_Command = {
544	"cp", /* name */
545	"cp [-R [-H \| -L \| -P]] [-f \| -i] [-pv] src target", /* usage */
546	"files", /* topic */
547	rtems_shell_main_cp, /* command */
548	NULL, /* alias */
549	NULL /* next */
550	};
551

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