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 #define MSC_DO_64_BIT_IO
39 #include "config.h"
40 #ifndef _MSC_VER
41 # include <sys/param.h>
42 #endif
43 #include <sys/stat.h>
44 #ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
45 # include <sys/mman.h>
46 #endif
47
48 #include "err.h"
49 #include <errno.h>
50 #include <fcntl.h>
51 #include <fts.h>
52 #include <limits.h>
53 #include <stdio.h>
54 #include <stdlib.h>
55 #include <signal.h>
56 #ifndef __HAIKU__
57 # include <sysexits.h>
58 #endif
59 #include <unistd.h>
60 #ifdef __sun__
61 # include "solfakes.h"
62 #endif
63 #ifdef __HAIKU__
64 # include "haikufakes.h"
65 #endif
66 #ifdef _MSC_VER
67 # include "mscfakes.h"
68 #else
69 # include <sys/time.h>
70 #endif
71 #include "cp_extern.h"
72 #include "cmp_extern.h"
73
74 #define cp_pct(x,y) (int)(100.0 * (double)(x) / (double)(y))
75
76 #ifndef MAXBSIZE
77 # define MAXBSIZE 0x20000
78 #endif
79 #ifndef O_BINARY
80 # define O_BINARY 0
81 #endif
82
83 #ifndef S_ISVTX
84 # define S_ISVTX 0
85 #endif
86
87
88 int
copy_file(const FTSENT * entp,int dne,int changed_only,int * pcopied)89 copy_file(const FTSENT *entp, int dne, int changed_only, int *pcopied)
90 {
91 static char buf[MAXBSIZE];
92 struct stat *fs;
93 int ch, checkch, from_fd, rcount, rval, to_fd;
94 ssize_t wcount;
95 size_t wresid;
96 size_t wtotal;
97 char *bufp;
98 #ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
99 char *p;
100 #endif
101
102 *pcopied = 0;
103
104 if ((from_fd = open(entp->fts_path, O_RDONLY | O_BINARY, 0)) == -1) {
105 warn("open: %s", entp->fts_path);
106 return (1);
107 }
108
109 fs = entp->fts_statp;
110
111 /*
112 * If the file exists and we're interactive, verify with the user.
113 * If the file DNE, set the mode to be the from file, minus setuid
114 * bits, modified by the umask; arguably wrong, but it makes copying
115 * executables work right and it's been that way forever. (The
116 * other choice is 666 or'ed with the execute bits on the from file
117 * modified by the umask.)
118 */
119 if (!dne) {
120 /* compare the files first if requested */
121 if (changed_only) {
122 if (cmp_fd_and_file(from_fd, entp->fts_path, to.p_path,
123 1 /* silent */, 0 /* lflag */,
124 0 /* special */) == OK_EXIT) {
125 close(from_fd);
126 return (0);
127 }
128 if (lseek(from_fd, 0, SEEK_SET) != 0) {
129 close(from_fd);
130 if ((from_fd = open(entp->fts_path, O_RDONLY | O_BINARY, 0)) == -1) {
131 warn("open: %s", entp->fts_path);
132 return (1);
133 }
134 }
135 }
136
137 #define YESNO "(y/n [n]) "
138 if (nflag) {
139 if (vflag)
140 printf("%s not overwritten\n", to.p_path);
141 return (0);
142 } else if (iflag) {
143 (void)fprintf(stderr, "overwrite %s? %s",
144 to.p_path, YESNO);
145 checkch = ch = getchar();
146 while (ch != '\n' && ch != EOF)
147 ch = getchar();
148 if (checkch != 'y' && checkch != 'Y') {
149 (void)close(from_fd);
150 (void)fprintf(stderr, "not overwritten\n");
151 return (1);
152 }
153 }
154
155 if (fflag) {
156 /* remove existing destination file name,
157 * create a new file */
158 (void)unlink(to.p_path);
159 to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT | O_BINARY,
160 fs->st_mode & ~(S_ISUID | S_ISGID));
161 } else
162 /* overwrite existing destination file name */
163 to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_BINARY, 0);
164 } else
165 to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT | O_BINARY,
166 fs->st_mode & ~(S_ISUID | S_ISGID));
167
168 if (to_fd == -1) {
169 warn("open: %s", to.p_path);
170 (void)close(from_fd);
171 return (1);
172 }
173
174 rval = 0;
175 *pcopied = 1;
176
177 /*
178 * Mmap and write if less than 8M (the limit is so we don't totally
179 * trash memory on big files. This is really a minor hack, but it
180 * wins some CPU back.
181 */
182 #ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED
183 if (S_ISREG(fs->st_mode) && fs->st_size > 0 &&
184 fs->st_size <= 8 * 1048576) {
185 if ((p = mmap(NULL, (size_t)fs->st_size, PROT_READ,
186 MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) {
187 warn("mmap: %s", entp->fts_path);
188 rval = 1;
189 } else {
190 wtotal = 0;
191 for (bufp = p, wresid = fs->st_size; ;
192 bufp += wcount, wresid -= (size_t)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("write[%zd != %zu]: %s", wcount, wresid, to.p_path);
208 rval = 1;
209 }
210 /* Some systems don't unmap on close(2). */
211 if (munmap(p, fs->st_size) < 0) {
212 warn("munmap: %s", entp->fts_path);
213 rval = 1;
214 }
215 }
216 } else
217 #endif
218 {
219 wtotal = 0;
220 while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
221 for (bufp = buf, wresid = rcount; ;
222 bufp += wcount, wresid -= wcount) {
223 wcount = write(to_fd, bufp, wresid);
224 wtotal += wcount;
225 if (info) {
226 info = 0;
227 (void)fprintf(stderr,
228 "%s -> %s %3d%%\n",
229 entp->fts_path, to.p_path,
230 cp_pct(wtotal, fs->st_size));
231
232 }
233 if (wcount >= (ssize_t)wresid || wcount <= 0)
234 break;
235 }
236 if (wcount != (ssize_t)wresid) {
237 warn("write[%zd != %zu]: %s", wcount, wresid, to.p_path);
238 rval = 1;
239 break;
240 }
241 }
242 if (rcount < 0) {
243 warn("read: %s", entp->fts_path);
244 rval = 1;
245 }
246 }
247
248 /*
249 * Don't remove the target even after an error. The target might
250 * not be a regular file, or its attributes might be important,
251 * or its contents might be irreplaceable. It would only be safe
252 * to remove it if we created it and its length is 0.
253 */
254
255 if (pflag && setfile(fs, to_fd))
256 rval = 1;
257 (void)close(from_fd);
258 if (close(to_fd)) {
259 warn("close: %s", to.p_path);
260 rval = 1;
261 }
262 return (rval);
263 }
264
265 int
copy_link(const FTSENT * p,int exists)266 copy_link(const FTSENT *p, int exists)
267 {
268 int len;
269 char llink[PATH_MAX];
270
271 if ((len = readlink(p->fts_path, llink, sizeof(llink) - 1)) == -1) {
272 warn("readlink: %s", p->fts_path);
273 return (1);
274 }
275 llink[len] = '\0';
276 if (exists && unlink(to.p_path)) {
277 warn("unlink: %s", to.p_path);
278 return (1);
279 }
280 if (symlink(llink, to.p_path)) {
281 warn("symlink: %s", llink);
282 return (1);
283 }
284 return (pflag ? setfile(p->fts_statp, -1) : 0);
285 }
286
287 int
copy_fifo(struct stat * from_stat,int exists)288 copy_fifo(struct stat *from_stat, int exists)
289 {
290 if (exists && unlink(to.p_path)) {
291 warn("unlink: %s", to.p_path);
292 return (1);
293 }
294 if (mkfifo(to.p_path, from_stat->st_mode)) {
295 warn("mkfifo: %s", to.p_path);
296 return (1);
297 }
298 return (pflag ? setfile(from_stat, -1) : 0);
299 }
300
301 int
copy_special(struct stat * from_stat,int exists)302 copy_special(struct stat *from_stat, int exists)
303 {
304 if (exists && unlink(to.p_path)) {
305 warn("unlink: %s", to.p_path);
306 return (1);
307 }
308 if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) {
309 warn("mknod: %s", to.p_path);
310 return (1);
311 }
312 return (pflag ? setfile(from_stat, -1) : 0);
313 }
314
315 int
setfile(struct stat * fs,int fd)316 setfile(struct stat *fs, int fd)
317 {
318 static struct timeval tv[2];
319 struct stat ts;
320 int rval, gotstat, islink, fdval;
321
322 rval = 0;
323 fdval = fd != -1;
324 islink = !fdval && S_ISLNK(fs->st_mode);
325 fs->st_mode &= S_ISUID | S_ISGID | S_ISVTX |
326 S_IRWXU | S_IRWXG | S_IRWXO;
327
328 #ifdef HAVE_ST_TIMESPEC
329 TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec);
330 TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec);
331 #else
332 tv[0].tv_sec = fs->st_atime;
333 tv[1].tv_sec = fs->st_mtime;
334 tv[0].tv_usec = tv[1].tv_usec = 0;
335 #endif
336 if (islink ? lutimes(to.p_path, tv) : utimes(to.p_path, tv)) {
337 warn("%sutimes: %s", islink ? "l" : "", to.p_path);
338 rval = 1;
339 }
340 if (fdval ? fstat(fd, &ts) :
341 (islink ? lstat(to.p_path, &ts) : stat(to.p_path, &ts)))
342 gotstat = 0;
343 else {
344 gotstat = 1;
345 ts.st_mode &= S_ISUID | S_ISGID | S_ISVTX |
346 S_IRWXU | S_IRWXG | S_IRWXO;
347 }
348 /*
349 * Changing the ownership probably won't succeed, unless we're root
350 * or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting
351 * the mode; current BSD behavior is to remove all setuid bits on
352 * chown. If chown fails, lose setuid/setgid bits.
353 */
354 if (!gotstat || fs->st_uid != ts.st_uid || fs->st_gid != ts.st_gid)
355 if (fdval ? fchown(fd, fs->st_uid, fs->st_gid) :
356 (islink ? lchown(to.p_path, fs->st_uid, fs->st_gid) :
357 chown(to.p_path, fs->st_uid, fs->st_gid))) {
358 if (errno != EPERM) {
359 warn("chown: %s", to.p_path);
360 rval = 1;
361 }
362 fs->st_mode &= ~(S_ISUID | S_ISGID);
363 }
364
365 if (!gotstat || fs->st_mode != ts.st_mode)
366 if (fdval ? fchmod(fd, fs->st_mode) :
367 (islink ? lchmod(to.p_path, fs->st_mode) :
368 chmod(to.p_path, fs->st_mode))) {
369 warn("chmod: %s", to.p_path);
370 rval = 1;
371 }
372
373 #ifdef HAVE_ST_FLAGS
374 if (!gotstat || fs->st_flags != ts.st_flags)
375 if (fdval ?
376 fchflags(fd, fs->st_flags) :
377 (islink ? (errno = ENOSYS) :
378 chflags(to.p_path, fs->st_flags))) {
379 warn("chflags: %s", to.p_path);
380 rval = 1;
381 }
382 #endif
383
384 return (rval);
385 }
386
387