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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 #include <sys/cdefs.h>
35
36 __FBSDID("$FreeBSD$");
37
38 #ifndef lint
39 static const char copyright[] =
40 "@(#) Copyright (c) 1985, 1987, 1993\n\
41         The Regents of the University of California.  All rights reserved.\n";
42 #endif
43
44 #ifndef lint
45 static const char sccsid[] = "@(#)tcopy.c       8.2 (Berkeley) 4/17/94";
46 #endif
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 <stdint.h>
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include <string.h>
62 #include <unistd.h>
63
64 #define MAXREC  (64 * 1024)
65 #define NOCOUNT (-2)
66
67 int     filen, guesslen, maxblk = MAXREC;
68 u_int64_t       lastrec, record, size, tsize;
69 FILE    *msg;
70
71 void    *getspace(int);
72 void     intr(int);
73 static void      usage(void);
74 void     verify(int, int, char *);
75 void     writeop(int, int);
76 void    rewind_tape(int);
77
78 int
79 main(argc, argv)
80         int argc;
81         char *argv[];
82 {
83         register int lastnread, nread, nw, inp, outp;
84         enum {READ, VERIFY, COPY, COPYVERIFY} op = READ;
85         sig_t oldsig;
86         int ch, needeof;
87         char *buff;
88         const char *inf;
89
90         msg = stdout;
91         guesslen = 1;
92         while ((ch = getopt(argc, argv, "cs:vx")) != -1)
93                 switch((char)ch) {
94                 case 'c':
95                         op = COPYVERIFY;
96                         break;
97                 case 's':
98                         maxblk = atoi(optarg);
99                         if (maxblk <= 0) {
100                                 warnx("illegal block size");
101                                 usage();
102                         }
103                         guesslen = 0;
104                         break;
105                 case 'v':
106                         op = VERIFY;
107                         break;
108                 case 'x':
109                         msg = stderr;
110                         break;
111                 case '?':
112                 default:
113                         usage();
114                 }
115         argc -= optind;
116         argv += optind;
117
118         switch(argc) {
119         case 0:
120                 if (op != READ)
121                         usage();
122                 inf = _PATH_DEFTAPE;
123                 break;
124         case 1:
125                 if (op != READ)
126                         usage();
127                 inf = argv[0];
128                 break;
129         case 2:
130                 if (op == READ)
131                         op = COPY;
132                 inf = argv[0];
133                 if ((outp = open(argv[1], op == VERIFY ? O_RDONLY :
134                     op == COPY ? O_WRONLY : O_RDWR, DEFFILEMODE)) < 0)
135                         err(3, "%s", argv[1]);
136                 break;
137         default:
138                 usage();
139         }
140
141         if ((inp = open(inf, O_RDONLY, 0)) < 0)
142                 err(1, "%s", inf);
143
144         buff = getspace(maxblk);
145
146         if (op == VERIFY) {
147                 verify(inp, outp, buff);
148                 exit(0);
149         }
150
151         if ((oldsig = signal(SIGINT, SIG_IGN)) != SIG_IGN)
152                 (void) signal(SIGINT, intr);
153
154         needeof = 0;
155         for (lastnread = NOCOUNT;;) {
156                 if ((nread = read(inp, buff, maxblk)) == -1) {
157                         while (errno == EINVAL && (maxblk -= 1024)) {
158                                 nread = read(inp, buff, maxblk);
159                                 if (nread >= 0)
160                                         goto r1;
161                         }
162                         err(1, "read error, file %d, record %qu", filen, record);
163                 } else if (nread != lastnread) {
164                         if (lastnread != 0 && lastnread != NOCOUNT) {
165                                 if (lastrec == 0 && nread == 0)
166                                         fprintf(msg, "%qu records\n", record);
167                                 else if (record - lastrec > 1)
168                                         fprintf(msg, "records %qu to %qu\n",
169                                             lastrec, record);
170                                 else
171                                         fprintf(msg, "record %qu\n", lastrec);
172                         }
173                         if (nread != 0)
174                                 fprintf(msg, "file %d: block size %d: ",
175                                     filen, nread);
176                         (void) fflush(stdout);
177                         lastrec = record;
178                 }
179 r1:             guesslen = 0;
180                 if (nread > 0) {
181                         if (op == COPY || op == COPYVERIFY) {
182                                 if (needeof) {
183                                         writeop(outp, MTWEOF);
184                                         needeof = 0;
185                                 }
186                                 nw = write(outp, buff, nread);
187                                 if (nw != nread) {
188                                         if (nw == -1) {
189                                         warn("write error, file %d, record %qu", filen, record);
190                                         } else {
191                                         warnx("write error, file %d, record %qu", filen, record);
192                                         warnx("write (%d) != read (%d)", nw, nread);
193                                         }
194                                         errx(5, "copy aborted");
195                                 }
196                         }
197                         size += nread;
198                         record++;
199                 } else {
200                         if (lastnread <= 0 && lastnread != NOCOUNT) {
201                                 fprintf(msg, "eot\n");
202                                 break;
203                         }
204                         fprintf(msg,
205                             "file %d: eof after %qu records: %qu bytes\n",
206                             filen, record, size);
207                         needeof = 1;
208                         filen++;
209                         tsize += size;
210                         size = record = lastrec = 0;
211                         lastnread = 0;
212                 }
213                 lastnread = nread;
214         }
215         fprintf(msg, "total length: %qu bytes\n", tsize);
216         (void)signal(SIGINT, oldsig);
217         if (op == COPY || op == COPYVERIFY) {
218                 writeop(outp, MTWEOF);
219                 writeop(outp, MTWEOF);
220                 if (op == COPYVERIFY) {
221                         rewind_tape(outp);
222                         rewind_tape(inp);
223                         verify(inp, outp, buff);
224                 }
225         }
226         exit(0);
227 }
228
229 void
230 verify(inp, outp, outb)
231         register int inp, outp;
232         register char *outb;
233 {
234         register int eot, inmaxblk, inn, outmaxblk, outn;
235         register char *inb;
236
237         inb = getspace(maxblk);
238         inmaxblk = outmaxblk = maxblk;
239         for (eot = 0;; guesslen = 0) {
240                 if ((inn = read(inp, inb, inmaxblk)) == -1) {
241                         if (guesslen)
242                                 while (errno == EINVAL && (inmaxblk -= 1024)) {
243                                         inn = read(inp, inb, inmaxblk);
244                                         if (inn >= 0)
245                                                 goto r1;
246                                 }
247                         warn("read error");
248                         break;
249                 }
250 r1:             if ((outn = read(outp, outb, outmaxblk)) == -1) {
251                         if (guesslen)
252                                 while (errno == EINVAL && (outmaxblk -= 1024)) {
253                                         outn = read(outp, outb, outmaxblk);
254                                         if (outn >= 0)
255                                                 goto r2;
256                                 }
257                         warn("read error");
258                         break;
259                 }
260 r2:             if (inn != outn) {
261                         fprintf(msg,
262                             "%s: tapes have different block sizes; %d != %d.\n",
263                             "tcopy", inn, outn);
264                         break;
265                 }
266                 if (!inn) {
267                         if (eot++) {
268                                 fprintf(msg, "tcopy: tapes are identical.\n");
269                                 return;
270                         }
271                 } else {
272                         if (bcmp(inb, outb, inn)) {
273                                 fprintf(msg,
274                                     "tcopy: tapes have different data.\n");
275                                 break;
276                         }
277                         eot = 0;
278                 }
279         }
280         exit(1);
281 }
282
283 void
284 intr(signo)
285         int signo __unused;
286 {
287         if (record) {
288                 if (record - lastrec > 1)
289                         fprintf(msg, "records %qu to %qu\n", lastrec, record);
290                 else
291                         fprintf(msg, "record %qu\n", lastrec);
292         }
293         fprintf(msg, "interrupt at file %d: record %qu\n", filen, record);
294         fprintf(msg, "total length: %ju bytes\n", (uintmax_t)(tsize + size));
295         exit(1);
296 }
297
298 void *
299 getspace(blk)
300         int blk;
301 {
302         void *bp;
303
304         if ((bp = malloc((size_t)blk)) == NULL)
305                 errx(11, "no memory");
306         return (bp);
307 }
308
309 void
310 writeop(fd, type)
311         int fd, type;
312 {
313         struct mtop op;
314
315         op.mt_op = type;
316         op.mt_count = (daddr_t)1;
317         if (ioctl(fd, MTIOCTOP, (char *)&op) < 0)
318                 err(6, "tape op");
319 }
320
321 static void
322 usage()
323 {
324         fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] [src [dest]]\n");
325         exit(1);
326 }
327
328 void
329 rewind_tape(int fd)
330 {
331         struct stat sp;
332
333         if(fstat(fd, &sp))
334                 errx(12, "fstat in rewind");
335
336         /*
337          * don't want to do tape ioctl on regular files:
338          */
339         if( S_ISREG(sp.st_mode) ) {
340                 if( lseek(fd, 0, SEEK_SET) == -1 )
341                         errx(13, "lseek");
342         } else
343                 /*  assume its a tape   */
344                 writeop(fd, MTREW);
345 }