cp_utils.c@ 775

Last change on this file since 775 was 370, checked in by bird, 19 years ago
o Ported all kmk builtins to win32. o Fixed serveral bugs in kmk builtins. o Probably broke both linux, bsd and OS/2. :-)
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 9.4 KB

Line
1	/*-
2	* Copyright (c) 1991, 1993, 1994
3	* The Regents of the University of California. All rights reserved.
4	*
5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions
7	* are met:
8	* 1. Redistributions of source code must retain the above copyright
9	* notice, this list of conditions and the following disclaimer.
10	* 2. Redistributions in binary form must reproduce the above copyright
11	* notice, this list of conditions and the following disclaimer in the
12	* documentation and/or other materials provided with the distribution.
13	* 4. Neither the name of the University nor the names of its contributors
14	* may be used to endorse or promote products derived from this software
15	* without specific prior written permission.
16	*
17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27	* SUCH DAMAGE.
28	*/
29
30	#ifndef lint
31	#if 0
32	static char sccsid[] = "@(#)utils.c 8.3 (Berkeley) 4/1/94";
33	#include <sys/cdefs.h>
34	__FBSDID("$FreeBSD: src/bin/cp/utils.c,v 1.43 2004/04/06 20:06:44 markm Exp $");
35	#endif
36	#endif /* not lint */
37
38	#ifndef _MSC_VER
39	#include <sys/param.h>
40	#endif
41	#include <sys/stat.h>
42	#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
43	#include <sys/mman.h>
44	#endif
45
46	#include "err.h"
47	#include <errno.h>
48	#include <fcntl.h>
49	#ifndef _MSC_VER
50	#include <fts.h>
51	#endif
52	#include <limits.h>
53	#include <stdio.h>
54	#include <stdlib.h>
55	#include <signal.h>
56	#ifndef _MSC_VER
57	#include <sysexits.h>
58	#include <unistd.h>
59	#else
60	#include "mscfakes.h"
61	#include "ftsfake.h"
62	#endif
63
64	#include "cp_extern.h"
65	#define cp_pct(x,y) (int)(100.0 * (double)(x) / (double)(y))
66
67	#ifndef MAXBSIZE
68	# define MAXBSIZE 16384
69	#endif
70	#ifndef O_BINARY
71	# define O_BINARY 0
72	#endif
73
74	#ifndef S_ISVTX
75	# define S_ISVTX 0
76	#endif
77
78	int
79	copy_file(const FTSENT *entp, int dne)
80	{
81	static char buf[MAXBSIZE];
82	struct stat *fs;
83	int ch, checkch, from_fd, rcount, rval, to_fd;
84	ssize_t wcount;
85	size_t wresid;
86	size_t wtotal;
87	char *bufp;
88	#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
89	char *p;
90	#endif
91
92	if ((from_fd = open(entp->fts_path, O_RDONLY \| O_BINARY, 0)) == -1) {
93	warn("%s", entp->fts_path);
94	return (1);
95	}
96
97	fs = entp->fts_statp;
98
99	/*
100	* If the file exists and we're interactive, verify with the user.
101	* If the file DNE, set the mode to be the from file, minus setuid
102	* bits, modified by the umask; arguably wrong, but it makes copying
103	* executables work right and it's been that way forever. (The
104	* other choice is 666 or'ed with the execute bits on the from file
105	* modified by the umask.)
106	*/
107	if (!dne) {
108	#define YESNO "(y/n [n]) "
109	if (nflag) {
110	if (vflag)
111	printf("%s not overwritten\n", to.p_path);
112	return (0);
113	} else if (iflag) {
114	(void)fprintf(stderr, "overwrite %s? %s",
115	to.p_path, YESNO);
116	checkch = ch = getchar();
117	while (ch != '\n' && ch != EOF)
118	ch = getchar();
119	if (checkch != 'y' && checkch != 'Y') {
120	(void)close(from_fd);
121	(void)fprintf(stderr, "not overwritten\n");
122	return (1);
123	}
124	}
125
126	if (fflag) {
127	/* remove existing destination file name,
128	* create a new file */
129	(void)unlink(to.p_path);
130	to_fd = open(to.p_path, O_WRONLY \| O_TRUNC \| O_CREAT \| O_BINARY,
131	fs->st_mode & ~(S_ISUID \| S_ISGID));
132	} else
133	/* overwrite existing destination file name */
134	to_fd = open(to.p_path, O_WRONLY \| O_TRUNC \| O_BINARY, 0);
135	} else
136	to_fd = open(to.p_path, O_WRONLY \| O_TRUNC \| O_CREAT \| O_BINARY,
137	fs->st_mode & ~(S_ISUID \| S_ISGID));
138
139	if (to_fd == -1) {
140	warn("%s", to.p_path);
141	(void)close(from_fd);
142	return (1);
143	}
144
145	rval = 0;
146
147	/*
148	* Mmap and write if less than 8M (the limit is so we don't totally
149	* trash memory on big files. This is really a minor hack, but it
150	* wins some CPU back.
151	*/
152	#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
153	if (S_ISREG(fs->st_mode) && fs->st_size > 0 &&
154	fs->st_size <= 8 * 1048576) {
155	if ((p = mmap(NULL, (size_t)fs->st_size, PROT_READ,
156	MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) {
157	warn("%s", entp->fts_path);
158	rval = 1;
159	} else {
160	wtotal = 0;
161	for (bufp = p, wresid = fs->st_size; ;
162	bufp += wcount, wresid -= (size_t)wcount) {
163	wcount = write(to_fd, bufp, wresid);
164	wtotal += wcount;
165	if (info) {
166	info = 0;
167	(void)fprintf(stderr,
168	"%s -> %s %3d%%\n",
169	entp->fts_path, to.p_path,
170	cp_pct(wtotal, fs->st_size));
171
172	}
173	if (wcount >= (ssize_t)wresid \|\| wcount <= 0)
174	break;
175	}
176	if (wcount != (ssize_t)wresid) {
177	warn("%s", to.p_path);
178	rval = 1;
179	}
180	/* Some systems don't unmap on close(2). */
181	if (munmap(p, fs->st_size) < 0) {
182	warn("%s", entp->fts_path);
183	rval = 1;
184	}
185	}
186	} else
187	#endif
188	{
189	wtotal = 0;
190	while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
191	for (bufp = buf, wresid = rcount; ;
192	bufp += wcount, wresid -= wcount) {
193	wcount = write(to_fd, bufp, wresid);
194	wtotal += wcount;
195	if (info) {
196	info = 0;
197	(void)fprintf(stderr,
198	"%s -> %s %3d%%\n",
199	entp->fts_path, to.p_path,
200	cp_pct(wtotal, fs->st_size));
201
202	}
203	if (wcount >= (ssize_t)wresid \|\| wcount <= 0)
204	break;
205	}
206	if (wcount != (ssize_t)wresid) {
207	warn("%s", to.p_path);
208	rval = 1;
209	break;
210	}
211	}
212	if (rcount < 0) {
213	warn("%s", entp->fts_path);
214	rval = 1;
215	}
216	}
217
218	/*
219	* Don't remove the target even after an error. The target might
220	* not be a regular file, or its attributes might be important,
221	* or its contents might be irreplaceable. It would only be safe
222	* to remove it if we created it and its length is 0.
223	*/
224
225	if (pflag && setfile(fs, to_fd))
226	rval = 1;
227	(void)close(from_fd);
228	if (close(to_fd)) {
229	warn("%s", to.p_path);
230	rval = 1;
231	}
232	return (rval);
233	}
234
235	int
236	copy_link(const FTSENT *p, int exists)
237	{
238	int len;
239	char llink[PATH_MAX];
240
241	if ((len = readlink(p->fts_path, llink, sizeof(llink) - 1)) == -1) {
242	warn("readlink: %s", p->fts_path);
243	return (1);
244	}
245	llink[len] = '\0';
246	if (exists && unlink(to.p_path)) {
247	warn("unlink: %s", to.p_path);
248	return (1);
249	}
250	if (symlink(llink, to.p_path)) {
251	warn("symlink: %s", llink);
252	return (1);
253	}
254	return (pflag ? setfile(p->fts_statp, -1) : 0);
255	}
256
257	int
258	copy_fifo(struct stat *from_stat, int exists)
259	{
260	if (exists && unlink(to.p_path)) {
261	warn("unlink: %s", to.p_path);
262	return (1);
263	}
264	if (mkfifo(to.p_path, from_stat->st_mode)) {
265	warn("mkfifo: %s", to.p_path);
266	return (1);
267	}
268	return (pflag ? setfile(from_stat, -1) : 0);
269	}
270
271	int
272	copy_special(struct stat *from_stat, int exists)
273	{
274	if (exists && unlink(to.p_path)) {
275	warn("unlink: %s", to.p_path);
276	return (1);
277	}
278	if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) {
279	warn("mknod: %s", to.p_path);
280	return (1);
281	}
282	return (pflag ? setfile(from_stat, -1) : 0);
283	}
284
285	int
286	setfile(struct stat *fs, int fd)
287	{
288	static struct timeval tv[2];
289	struct stat ts;
290	int rval, gotstat, islink, fdval;
291
292	rval = 0;
293	fdval = fd != -1;
294	islink = !fdval && S_ISLNK(fs->st_mode);
295	fs->st_mode &= S_ISUID \| S_ISGID \| S_ISVTX \|
296	S_IRWXU \| S_IRWXG \| S_IRWXO;
297
298	#ifdef HAVE_ST_TIMESPEC
299	TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec);
300	TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec);
301	#else
302	tv[0].tv_sec = fs->st_atime;
303	tv[1].tv_sec = fs->st_mtime;
304	tv[0].tv_usec = tv[1].tv_usec = 0;
305	#endif
306	if (islink ? lutimes(to.p_path, tv) : utimes(to.p_path, tv)) {
307	warn("%sutimes: %s", islink ? "l" : "", to.p_path);
308	rval = 1;
309	}
310	if (fdval ? fstat(fd, &ts) :
311	(islink ? lstat(to.p_path, &ts) : stat(to.p_path, &ts)))
312	gotstat = 0;
313	else {
314	gotstat = 1;
315	ts.st_mode &= S_ISUID \| S_ISGID \| S_ISVTX \|
316	S_IRWXU \| S_IRWXG \| S_IRWXO;
317	}
318	/*
319	* Changing the ownership probably won't succeed, unless we're root
320	* or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting
321	* the mode; current BSD behavior is to remove all setuid bits on
322	* chown. If chown fails, lose setuid/setgid bits.
323	*/
324	if (!gotstat \|\| fs->st_uid != ts.st_uid \|\| fs->st_gid != ts.st_gid)
325	if (fdval ? fchown(fd, fs->st_uid, fs->st_gid) :
326	(islink ? lchown(to.p_path, fs->st_uid, fs->st_gid) :
327	chown(to.p_path, fs->st_uid, fs->st_gid))) {
328	if (errno != EPERM) {
329	warn("chown: %s", to.p_path);
330	rval = 1;
331	}
332	fs->st_mode &= ~(S_ISUID \| S_ISGID);
333	}
334
335	if (!gotstat \|\| fs->st_mode != ts.st_mode)
336	if (fdval ? fchmod(fd, fs->st_mode) :
337	(islink ? lchmod(to.p_path, fs->st_mode) :
338	chmod(to.p_path, fs->st_mode))) {
339	warn("chmod: %s", to.p_path);
340	rval = 1;
341	}
342
343	#ifdef HAVE_ST_FLAGS
344	if (!gotstat \|\| fs->st_flags != ts.st_flags)
345	if (fdval ?
346	fchflags(fd, fs->st_flags) :
347	(islink ? (errno = ENOSYS) :
348	chflags(to.p_path, fs->st_flags))) {
349	warn("chflags: %s", to.p_path);
350	rval = 1;
351	}
352	#endif
353
354	return (rval);
355	}
356
357	int
358	usage(void)
359	{
360
361	(void)fprintf(stderr, "%s\n%s\n",
362	"usage: cp [-R [-H \| -L \| -P]] [-f \| -i \| -n] [-pv] src target",
363	" cp [-R [-H \| -L \| -P]] [-f \| -i \| -n] [-pv] src1 ... srcN directory");
364	return EX_USAGE;
365	}

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source: kBuild/trunk/src/gmake/kmkbuiltin/cp_utils.c@ 775

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