1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1985, 1987, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33
34 __FBSDID("$FreeBSD: stable/12/usr.bin/tcopy/tcopy.c 327267 2017-12-28 05:33:39Z imp $");
35
36 #ifndef lint
37 static const char copyright[] =
38 "@(#) Copyright (c) 1985, 1987, 1993\n\
39 The Regents of the University of California. All rights reserved.\n";
40 #endif
41
42 #ifndef lint
43 static const char sccsid[] = "@(#)tcopy.c 8.2 (Berkeley) 4/17/94";
44 #endif
45
46 #include <sys/types.h>
47 #include <sys/stat.h>
48 #include <sys/ioctl.h>
49 #include <sys/mtio.h>
50
51 #include <err.h>
52 #include <errno.h>
53 #include <fcntl.h>
54 #include <paths.h>
55 #include <signal.h>
56 #include <stdint.h>
57 #include <stdio.h>
58 #include <stdlib.h>
59 #include <string.h>
60 #include <unistd.h>
61
62 #define MAXREC (64 * 1024)
63 #define NOCOUNT (-2)
64
65 static int filen, guesslen, maxblk = MAXREC;
66 static uint64_t lastrec, record, size, tsize;
67 static FILE *msg;
68
69 static void *getspace(int);
70 static void intr(int);
71 static void usage(void) __dead2;
72 static void verify(int, int, char *);
73 static void writeop(int, int);
74 static void rewind_tape(int);
75
76 int
main(int argc,char * argv[])77 main(int argc, char *argv[])
78 {
79 int lastnread, nread, nw, inp, outp;
80 enum {READ, VERIFY, COPY, COPYVERIFY} op = READ;
81 sig_t oldsig;
82 int ch, needeof;
83 char *buff;
84 const char *inf;
85
86 msg = stdout;
87 guesslen = 1;
88 outp = -1;
89 while ((ch = getopt(argc, argv, "cs:vx")) != -1)
90 switch((char)ch) {
91 case 'c':
92 op = COPYVERIFY;
93 break;
94 case 's':
95 maxblk = atoi(optarg);
96 if (maxblk <= 0) {
97 warnx("illegal block size");
98 usage();
99 }
100 guesslen = 0;
101 break;
102 case 'v':
103 op = VERIFY;
104 break;
105 case 'x':
106 msg = stderr;
107 break;
108 case '?':
109 default:
110 usage();
111 }
112 argc -= optind;
113 argv += optind;
114
115 switch(argc) {
116 case 0:
117 if (op != READ)
118 usage();
119 inf = _PATH_DEFTAPE;
120 break;
121 case 1:
122 if (op != READ)
123 usage();
124 inf = argv[0];
125 break;
126 case 2:
127 if (op == READ)
128 op = COPY;
129 inf = argv[0];
130 if ((outp = open(argv[1], op == VERIFY ? O_RDONLY :
131 op == COPY ? O_WRONLY : O_RDWR, DEFFILEMODE)) < 0)
132 err(3, "%s", argv[1]);
133 break;
134 default:
135 usage();
136 }
137
138 if ((inp = open(inf, O_RDONLY, 0)) < 0)
139 err(1, "%s", inf);
140
141 buff = getspace(maxblk);
142
143 if (op == VERIFY) {
144 verify(inp, outp, buff);
145 exit(0);
146 }
147
148 if ((oldsig = signal(SIGINT, SIG_IGN)) != SIG_IGN)
149 (void) signal(SIGINT, intr);
150
151 needeof = 0;
152 for (lastnread = NOCOUNT;;) {
153 if ((nread = read(inp, buff, maxblk)) == -1) {
154 while (errno == EINVAL && (maxblk -= 1024)) {
155 nread = read(inp, buff, maxblk);
156 if (nread >= 0)
157 goto r1;
158 }
159 err(1, "read error, file %d, record %ju", filen, (intmax_t)record);
160 } else if (nread != lastnread) {
161 if (lastnread != 0 && lastnread != NOCOUNT) {
162 if (lastrec == 0 && nread == 0)
163 fprintf(msg, "%ju records\n", (intmax_t)record);
164 else if (record - lastrec > 1)
165 fprintf(msg, "records %ju to %ju\n",
166 (intmax_t)lastrec, (intmax_t)record);
167 else
168 fprintf(msg, "record %ju\n", (intmax_t)lastrec);
169 }
170 if (nread != 0)
171 fprintf(msg, "file %d: block size %d: ",
172 filen, nread);
173 (void) fflush(stdout);
174 lastrec = record;
175 }
176 r1: guesslen = 0;
177 if (nread > 0) {
178 if (op == COPY || op == COPYVERIFY) {
179 if (needeof) {
180 writeop(outp, MTWEOF);
181 needeof = 0;
182 }
183 nw = write(outp, buff, nread);
184 if (nw != nread) {
185 if (nw == -1) {
186 warn("write error, file %d, record %ju", filen,
187 (intmax_t)record);
188 } else {
189 warnx("write error, file %d, record %ju", filen,
190 (intmax_t)record);
191 warnx("write (%d) != read (%d)", nw, nread);
192 }
193 errx(5, "copy aborted");
194 }
195 }
196 size += nread;
197 record++;
198 } else {
199 if (lastnread <= 0 && lastnread != NOCOUNT) {
200 fprintf(msg, "eot\n");
201 break;
202 }
203 fprintf(msg,
204 "file %d: eof after %ju records: %ju bytes\n",
205 filen, (intmax_t)record, (intmax_t)size);
206 needeof = 1;
207 filen++;
208 tsize += size;
209 size = record = lastrec = 0;
210 lastnread = 0;
211 }
212 lastnread = nread;
213 }
214 fprintf(msg, "total length: %ju bytes\n", (intmax_t)tsize);
215 (void)signal(SIGINT, oldsig);
216 if (op == COPY || op == COPYVERIFY) {
217 writeop(outp, MTWEOF);
218 writeop(outp, MTWEOF);
219 if (op == COPYVERIFY) {
220 rewind_tape(outp);
221 rewind_tape(inp);
222 verify(inp, outp, buff);
223 }
224 }
225 exit(0);
226 }
227
228 static void
verify(int inp,int outp,char * outb)229 verify(int inp, int outp, char *outb)
230 {
231 int eot, inmaxblk, inn, outmaxblk, outn;
232 char *inb;
233
234 inb = getspace(maxblk);
235 inmaxblk = outmaxblk = maxblk;
236 for (eot = 0;; guesslen = 0) {
237 if ((inn = read(inp, inb, inmaxblk)) == -1) {
238 if (guesslen)
239 while (errno == EINVAL && (inmaxblk -= 1024)) {
240 inn = read(inp, inb, inmaxblk);
241 if (inn >= 0)
242 goto r1;
243 }
244 warn("read error");
245 break;
246 }
247 r1: if ((outn = read(outp, outb, outmaxblk)) == -1) {
248 if (guesslen)
249 while (errno == EINVAL && (outmaxblk -= 1024)) {
250 outn = read(outp, outb, outmaxblk);
251 if (outn >= 0)
252 goto r2;
253 }
254 warn("read error");
255 break;
256 }
257 r2: if (inn != outn) {
258 fprintf(msg,
259 "%s: tapes have different block sizes; %d != %d.\n",
260 "tcopy", inn, outn);
261 break;
262 }
263 if (!inn) {
264 if (eot++) {
265 fprintf(msg, "tcopy: tapes are identical.\n");
266 free(inb);
267 return;
268 }
269 } else {
270 if (bcmp(inb, outb, inn)) {
271 fprintf(msg,
272 "tcopy: tapes have different data.\n");
273 break;
274 }
275 eot = 0;
276 }
277 }
278 exit(1);
279 }
280
281 static void
intr(int signo __unused)282 intr(int signo __unused)
283 {
284 if (record) {
285 if (record - lastrec > 1)
286 fprintf(msg, "records %ju to %ju\n", (intmax_t)lastrec, (intmax_t)record);
287 else
288 fprintf(msg, "record %ju\n", (intmax_t)lastrec);
289 }
290 fprintf(msg, "interrupt at file %d: record %ju\n", filen, (intmax_t)record);
291 fprintf(msg, "total length: %ju bytes\n", (uintmax_t)(tsize + size));
292 exit(1);
293 }
294
295 static void *
getspace(int blk)296 getspace(int blk)
297 {
298 void *bp;
299
300 if ((bp = malloc((size_t)blk)) == NULL)
301 errx(11, "no memory");
302 return (bp);
303 }
304
305 static void
writeop(int fd,int type)306 writeop(int fd, int type)
307 {
308 struct mtop op;
309
310 op.mt_op = type;
311 op.mt_count = (daddr_t)1;
312 if (ioctl(fd, MTIOCTOP, (char *)&op) < 0)
313 err(6, "tape op");
314 }
315
316 static void
usage(void)317 usage(void)
318 {
319 fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] [src [dest]]\n");
320 exit(1);
321 }
322
323 static void
rewind_tape(int fd)324 rewind_tape(int fd)
325 {
326 struct stat sp;
327
328 if(fstat(fd, &sp))
329 errx(12, "fstat in rewind");
330
331 /*
332 * don't want to do tape ioctl on regular files:
333 */
334 if( S_ISREG(sp.st_mode) ) {
335 if( lseek(fd, 0, SEEK_SET) == -1 )
336 errx(13, "lseek");
337 } else
338 /* assume its a tape */
339 writeop(fd, MTREW);
340 }
341