usr.bin/tcopy/tcopy.c

   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  * @(#) Copyright (c) 1985, 1987, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)tcopy.c  8.2 (Berkeley) 4/17/94
  35  * $FreeBSD: src/usr.bin/tcopy/tcopy.c,v 1.7.2.1 2002/11/07 17:54:42 imp Exp $
  36  * $DragonFly: src/usr.bin/tcopy/tcopy.c,v 1.3 2003/10/04 20:36:52 hmp Exp $
  37  */
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <sys/ioctl.h>
  42 #include <sys/mtio.h>
  43
  44 #include <err.h>
  45 #include <errno.h>
  46 #include <fcntl.h>
  47 #include <signal.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <unistd.h>
  52
  53 #include "pathnames.h"
  54
  55 #define MAXREC  (64 * 1024)
  56 #define NOCOUNT (-2)
  57
  58 int     filen, guesslen, maxblk = MAXREC;
  59 u_int64_t       lastrec, record, size, tsize;
  60 FILE    *msg;
  61
  62 void    *getspace(int);
  63 void     intr(int);
  64 static void      usage(void);
  65 void     verify(int, int, char *);
  66 void     writeop(int, int);
  67 void    rewind_tape(int);
  68
  69 int
  70 main(int argc, char **argv)
  71 {
  72         register int lastnread, nread, nw, inp, outp;
  73         enum {READ, VERIFY, COPY, COPYVERIFY} op = READ;
  74         sig_t oldsig;
  75         int ch, needeof;
  76         char *buff, *inf;
  77
  78         msg = stdout;
  79         guesslen = 1;
  80         while ((ch = getopt(argc, argv, "cs:vx")) != -1)
  81                 switch((char)ch) {
  82                 case 'c':
  83                         op = COPYVERIFY;
  84                         break;
  85                 case 's':
  86                         maxblk = atoi(optarg);
  87                         if (maxblk <= 0) {
  88                                 warnx("illegal block size");
  89                                 usage();
  90                         }
  91                         guesslen = 0;
  92                         break;
  93                 case 'v':
  94                         op = VERIFY;
  95                         break;
  96                 case 'x':
  97                         msg = stderr;
  98                         break;
  99                 case '?':
 100                 default:
 101                         usage();
 102                 }
 103         argc -= optind;
 104         argv += optind;
 105
 106         switch(argc) {
 107         case 0:
 108                 if (op != READ)
 109                         usage();
 110                 inf = _PATH_DEFTAPE;
 111                 break;
 112         case 1:
 113                 if (op != READ)
 114                         usage();
 115                 inf = argv[0];
 116                 break;
 117         case 2:
 118                 if (op == READ)
 119                         op = COPY;
 120                 inf = argv[0];
 121                 if ((outp = open(argv[1], op == VERIFY ? O_RDONLY :
 122                     op == COPY ? O_WRONLY : O_RDWR, DEFFILEMODE)) < 0)
 123                         err(3, "%s", argv[1]);
 124                 break;
 125         default:
 126                 usage();
 127         }
 128
 129         if ((inp = open(inf, O_RDONLY, 0)) < 0)
 130                 err(1, "%s", inf);
 131
 132         buff = getspace(maxblk);
 133
 134         if (op == VERIFY) {
 135                 verify(inp, outp, buff);
 136                 exit(0);
 137         }
 138
 139         if ((oldsig = signal(SIGINT, SIG_IGN)) != SIG_IGN)
 140                 (void) signal(SIGINT, intr);
 141
 142         needeof = 0;
 143         for (lastnread = NOCOUNT;;) {
 144                 if ((nread = read(inp, buff, maxblk)) == -1) {
 145                         while (errno == EINVAL && (maxblk -= 1024)) {
 146                                 nread = read(inp, buff, maxblk);
 147                                 if (nread >= 0)
 148                                         goto r1;
 149                         }
 150                         err(1, "read error, file %d, record %qu", filen, record);
 151                 } else if (nread != lastnread) {
 152                         if (lastnread != 0 && lastnread != NOCOUNT) {
 153                                 if (lastrec == 0 && nread == 0)
 154                                         fprintf(msg, "%qu records\n", record);
 155                                 else if (record - lastrec > 1)
 156                                         fprintf(msg, "records %qu to %qu\n",
 157                                             lastrec, record);
 158                                 else
 159                                         fprintf(msg, "record %qu\n", lastrec);
 160                         }
 161                         if (nread != 0)
 162                                 fprintf(msg, "file %d: block size %d: ",
 163                                     filen, nread);
 164                         (void) fflush(stdout);
 165                         lastrec = record;
 166                 }
 167 r1:             guesslen = 0;
 168                 if (nread > 0) {
 169                         if (op == COPY || op == COPYVERIFY) {
 170                                 if (needeof) {
 171                                         writeop(outp, MTWEOF);
 172                                         needeof = 0;
 173                                 }
 174                                 nw = write(outp, buff, nread);
 175                                 if (nw != nread) {
 176                                         if (nw == -1) {
 177                                         warn("write error, file %d, record %qu", filen, record);
 178                                         } else {
 179                                         warnx("write error, file %d, record %qu", filen, record);
 180                                         warnx("write (%d) != read (%d)", nw, nread);
 181                                         }
 182                                         errx(5, "copy aborted");
 183                                 }
 184                         }
 185                         size += nread;
 186                         record++;
 187                 } else {
 188                         if (lastnread <= 0 && lastnread != NOCOUNT) {
 189                                 fprintf(msg, "eot\n");
 190                                 break;
 191                         }
 192                         fprintf(msg,
 193                             "file %d: eof after %qu records: %qu bytes\n",
 194                             filen, record, size);
 195                         needeof = 1;
 196                         filen++;
 197                         tsize += size;
 198                         size = record = lastrec = 0;
 199                         lastnread = 0;
 200                 }
 201                 lastnread = nread;
 202         }
 203         fprintf(msg, "total length: %qu bytes\n", tsize);
 204         (void)signal(SIGINT, oldsig);
 205         if (op == COPY || op == COPYVERIFY) {
 206                 writeop(outp, MTWEOF);
 207                 writeop(outp, MTWEOF);
 208                 if (op == COPYVERIFY) {
 209                         rewind_tape(outp);
 210                         rewind_tape(inp);
 211                         verify(inp, outp, buff);
 212                 }
 213         }
 214         exit(0);
 215 }
 216
 217 void
 218 verify(register int inp, register int outp, register char *outb)
 219 {
 220         register int eot, inmaxblk, inn, outmaxblk, outn;
 221         register char *inb;
 222
 223         inb = getspace(maxblk);
 224         inmaxblk = outmaxblk = maxblk;
 225         for (eot = 0;; guesslen = 0) {
 226                 if ((inn = read(inp, inb, inmaxblk)) == -1) {
 227                         if (guesslen)
 228                                 while (errno == EINVAL && (inmaxblk -= 1024)) {
 229                                         inn = read(inp, inb, inmaxblk);
 230                                         if (inn >= 0)
 231                                                 goto r1;
 232                                 }
 233                         warn("read error");
 234                         break;
 235                 }
 236 r1:             if ((outn = read(outp, outb, outmaxblk)) == -1) {
 237                         if (guesslen)
 238                                 while (errno == EINVAL && (outmaxblk -= 1024)) {
 239                                         outn = read(outp, outb, outmaxblk);
 240                                         if (outn >= 0)
 241                                                 goto r2;
 242                                 }
 243                         warn("read error");
 244                         break;
 245                 }
 246 r2:             if (inn != outn) {
 247                         fprintf(msg,
 248                             "%s: tapes have different block sizes; %d != %d.\n",
 249                             "tcopy", inn, outn);
 250                         break;
 251                 }
 252                 if (!inn) {
 253                         if (eot++) {
 254                                 fprintf(msg, "tcopy: tapes are identical.\n");
 255                                 return;
 256                         }
 257                 } else {
 258                         if (bcmp(inb, outb, inn)) {
 259                                 fprintf(msg,
 260                                     "tcopy: tapes have different data.\n");
 261                                 break;
 262                         }
 263                         eot = 0;
 264                 }
 265         }
 266         exit(1);
 267 }
 268
 269 void
 270 intr(int signo)
 271 {
 272         if (record) {
 273                 if (record - lastrec > 1)
 274                         fprintf(msg, "records %qu to %qu\n", lastrec, record);
 275                 else
 276                         fprintf(msg, "record %qu\n", lastrec);
 277         }
 278         fprintf(msg, "interrupt at file %d: record %qu\n", filen, record);
 279         fprintf(msg, "total length: %ld bytes\n", tsize + size);
 280         exit(1);
 281 }
 282
 283 void *
 284 getspace(int blk)
 285 {
 286         void *bp;
 287
 288         if ((bp = malloc((size_t)blk)) == NULL)
 289                 errx(11, "no memory");
 290         return (bp);
 291 }
 292
 293 void
 294 writeop(int fd, int type)
 295 {
 296         struct mtop op;
 297
 298         op.mt_op = type;
 299         op.mt_count = (daddr_t)1;
 300         if (ioctl(fd, MTIOCTOP, (char *)&op) < 0)
 301                 err(6, "tape op");
 302 }
 303
 304 static void
 305 usage(void)
 306 {
 307         fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] [src [dest]]\n");
 308         exit(1);
 309 }
 310
 311 void
 312 rewind_tape(int fd)
 313 {
 314         struct stat sp;
 315
 316         if(fstat(fd, &sp))
 317                 errx(12, "fstat in rewind");
 318
 319         /*
 320          * don't want to do tape ioctl on regular files:
 321          */
 322         if( S_ISREG(sp.st_mode) ) {
 323                 if( lseek(fd, 0, SEEK_SET) == -1 )
 324                         errx(13, "lseek");
 325         } else
 326                 /*  assume its a tape   */
 327                 writeop(fd, MTREW);
 328 }