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1 /*
2  * Copyright (c) 1985, 1987, 1993
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  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *      This product includes software developed by the University of
16  *      California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33
34 #ifndef lint
35 static const char copyright[] =
36 "@(#) Copyright (c) 1985, 1987, 1993\n\
37         The Regents of the University of California.  All rights reserved.\n";
38 #endif /* not lint */
39
40 #ifndef lint
41 #if 0
42 static char sccsid[] = "@(#)tcopy.c     8.2 (Berkeley) 4/17/94";
43 #endif
44 static const char rcsid[] =
45   "$FreeBSD$";
46 #endif /* not lint */
47
48 #include <sys/types.h>
49 #include <sys/stat.h>
50 #include <sys/ioctl.h>
51 #include <sys/mtio.h>
52
53 #include <err.h>
54 #include <errno.h>
55 #include <fcntl.h>
56 #include <paths.h>
57 #include <signal.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <unistd.h>
62
63 #define MAXREC  (64 * 1024)
64 #define NOCOUNT (-2)
65
66 int     filen, guesslen, maxblk = MAXREC;
67 u_int64_t       lastrec, record, size, tsize;
68 FILE    *msg = stdout;
69
70 void    *getspace __P((int));
71 void     intr __P((int));
72 static void      usage __P((void));
73 void     verify __P((int, int, char *));
74 void     writeop __P((int, int));
75 void    rewind_tape(int);
76
77 int
78 main(argc, argv)
79         int argc;
80         char *argv[];
81 {
82         register int lastnread, nread, nw, inp, outp;
83         enum {READ, VERIFY, COPY, COPYVERIFY} op = READ;
84         sig_t oldsig;
85         int ch, needeof;
86         char *buff, *inf;
87
88         guesslen = 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 %qu", filen, record);
160                 } else if (nread != lastnread) {
161                         if (lastnread != 0 && lastnread != NOCOUNT) {
162                                 if (lastrec == 0 && nread == 0)
163                                         fprintf(msg, "%qu records\n", record);
164                                 else if (record - lastrec > 1)
165                                         fprintf(msg, "records %qu to %qu\n",
166                                             lastrec, record);
167                                 else
168                                         fprintf(msg, "record %qu\n", 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 %qu", filen, record);
187                                         } else {
188                                         warnx("write error, file %d, record %qu", filen, record);
189                                         warnx("write (%d) != read (%d)", nw, nread);
190                                         }
191                                         errx(5, "copy aborted");
192                                 }
193                         }
194                         size += nread;
195                         record++;
196                 } else {
197                         if (lastnread <= 0 && lastnread != NOCOUNT) {
198                                 fprintf(msg, "eot\n");
199                                 break;
200                         }
201                         fprintf(msg,
202                             "file %d: eof after %qu records: %qu bytes\n",
203                             filen, record, size);
204                         needeof = 1;
205                         filen++;
206                         tsize += size;
207                         size = record = lastrec = 0;
208                         lastnread = 0;
209                 }
210                 lastnread = nread;
211         }
212         fprintf(msg, "total length: %qu bytes\n", tsize);
213         (void)signal(SIGINT, oldsig);
214         if (op == COPY || op == COPYVERIFY) {
215                 writeop(outp, MTWEOF);
216                 writeop(outp, MTWEOF);
217                 if (op == COPYVERIFY) {
218                         rewind_tape(outp);
219                         rewind_tape(inp);
220                         verify(inp, outp, buff);
221                 }
222         }
223         exit(0);
224 }
225
226 void
227 verify(inp, outp, outb)
228         register int inp, outp;
229         register char *outb;
230 {
231         register int eot, inmaxblk, inn, outmaxblk, outn;
232         register 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                                 return;
267                         }
268                 } else {
269                         if (bcmp(inb, outb, inn)) {
270                                 fprintf(msg,
271                                     "tcopy: tapes have different data.\n");
272                                 break;
273                         }
274                         eot = 0;
275                 }
276         }
277         exit(1);
278 }
279
280 void
281 intr(signo)
282         int signo;
283 {
284         if (record) {
285                 if (record - lastrec > 1)
286                         fprintf(msg, "records %qu to %qu\n", lastrec, record);
287                 else
288                         fprintf(msg, "record %qu\n", lastrec);
289         }
290         fprintf(msg, "interrupt at file %d: record %qu\n", filen, record);
291         fprintf(msg, "total length: %ld bytes\n", tsize + size);
292         exit(1);
293 }
294
295 void *
296 getspace(blk)
297         int blk;
298 {
299         void *bp;
300
301         if ((bp = malloc((size_t)blk)) == NULL)
302                 errx(11, "no memory");
303         return (bp);
304 }
305
306 void
307 writeop(fd, type)
308         int fd, type;
309 {
310         struct mtop op;
311
312         op.mt_op = type;
313         op.mt_count = (daddr_t)1;
314         if (ioctl(fd, MTIOCTOP, (char *)&op) < 0)
315                 err(6, "tape op");
316 }
317
318 static void
319 usage()
320 {
321         fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] [src [dest]]\n");
322         exit(1);
323 }
324
325 void
326 rewind_tape(int fd)
327 {
328         struct stat sp;
329
330         if(fstat(fd, &sp))
331                 errx(12, "fstat in rewind");
332
333         /*
334          * don't want to do tape ioctl on regular files:
335          */
336         if( S_ISREG(sp.st_mode) ) {
337                 if( lseek(fd, 0, SEEK_SET) == -1 )
338                         errx(13, "lseek");
339         } else
340                 /*  assume its a tape   */
341                 writeop(fd, MTREW);
342 }