usr.bin/tcopy/tcopy.c

   1 /*      $NetBSD: tcopy.c,v 1.15 2008/07/21 14:19:26 lukem Exp $ */
   2
   3 /*
   4  * Copyright (c) 1985, 1987, 1993, 1995
   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 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1985, 1987, 1993\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)tcopy.c     8.3 (Berkeley) 1/23/95";
  41 #endif
  42 __RCSID("$NetBSD: tcopy.c,v 1.15 2008/07/21 14:19:26 lukem Exp $");
  43 #endif /* not lint */
  44
  45 #include <sys/types.h>
  46 #include <sys/stat.h>
  47 #include <sys/ioctl.h>
  48 #include <sys/mtio.h>
  49
  50 #include <err.h>
  51 #include <errno.h>
  52 #include <paths.h>
  53 #include <fcntl.h>
  54 #include <signal.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58 #include <unistd.h>
  59 #include <util.h>
  60
  61 #define MAXREC  (64 * 1024)
  62 #define NOCOUNT (-2)
  63
  64 int     filen, guesslen, maxblk = MAXREC;
  65 long    lastrec, record;
  66 off_t   size, tsize;
  67 FILE    *msg = stdout;
  68
  69 void    *getspace __P((int));
  70 void     intr __P((int));
  71 int      main __P((int, char **));
  72 void     usage __P((void));
  73 void     verify __P((int, int, char *));
  74 void     writeop __P((int, int));
  75
  76 int
  77 main(argc, argv)
  78         int argc;
  79         char *argv[];
  80 {
  81         int ch, needeof, nw, inp, outp;
  82         ssize_t lastnread, nread;
  83         enum {READ, VERIFY, COPY, COPYVERIFY} op = READ;
  84         sig_t oldsig;
  85         char *buff;
  86         const char *inf;
  87
  88         outp = 0;
  89         inf = NULL;
  90         guesslen = 1;
  91         while ((ch = getopt(argc, argv, "cs:vx")) != -1)
  92                 switch((char)ch) {
  93                 case 'c':
  94                         op = COPYVERIFY;
  95                         break;
  96                 case 's':
  97                         maxblk = atoi(optarg);
  98                         if (maxblk <= 0) {
  99                                 warnx("illegal block size");
 100                                 usage();
 101                         }
 102                         guesslen = 0;
 103                         break;
 104                 case 'v':
 105                         op = VERIFY;
 106                         break;
 107                 case 'x':
 108                         msg = stderr;
 109                         break;
 110                 case '?':
 111                 default:
 112                         usage();
 113                 }
 114         argc -= optind;
 115         argv += optind;
 116
 117         switch(argc) {
 118         case 0:
 119                 if (op != READ)
 120                         usage();
 121                 inf = _PATH_DEFTAPE;
 122                 break;
 123         case 1:
 124                 if (op != READ)
 125                         usage();
 126                 inf = argv[0];
 127                 break;
 128         case 2:
 129                 if (op == READ)
 130                         op = COPY;
 131                 inf = argv[0];
 132                 if ((outp = open(argv[1], op == VERIFY ? O_RDONLY :
 133                     op == COPY ? O_WRONLY : O_RDWR, DEFFILEMODE)) < 0) {
 134                         err(3, "%s", argv[1]);
 135                 }
 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 %ld",
 163                             filen, record);
 164                 } else if (nread != lastnread) {
 165                         if (lastnread != 0 && lastnread != NOCOUNT) {
 166                                 if (lastrec == 0 && nread == 0)
 167                                         fprintf(msg, "%ld records\n", record);
 168                                 else if (record - lastrec > 1)
 169                                         fprintf(msg, "records %ld to %ld\n",
 170                                             lastrec, record);
 171                                 else
 172                                         fprintf(msg, "record %ld\n", lastrec);
 173                         }
 174                         if (nread != 0)
 175                                 fprintf(msg, "file %d: block size %ld: ",
 176                                     filen, (long)nread);
 177                         (void) fflush(stdout);
 178                         lastrec = record;
 179                 }
 180 r1:             guesslen = 0;
 181                 if (nread > 0) {
 182                         if (op == COPY || op == COPYVERIFY) {
 183                                 if (needeof) {
 184                                         writeop(outp, MTWEOF);
 185                                         needeof = 0;
 186                                 }
 187                                 nw = write(outp, buff, nread);
 188                                 if (nw != nread) {
 189                                     int error = errno;
 190                                     fprintf(stderr,
 191                                         "write error, file %d, record %ld: ",
 192                                         filen, record);
 193                                     if (nw == -1)
 194                                         fprintf(stderr,
 195                                                 ": %s", strerror(error));
 196                                     else
 197                                         fprintf(stderr,
 198                                             "write (%d) != read (%ld)\n",
 199                                             nw, (long)nread);
 200                                     fprintf(stderr, "copy aborted\n");
 201                                     exit(5);
 202                                 }
 203                         }
 204                         size += nread;
 205                         record++;
 206                 } else {
 207                         if (lastnread <= 0 && lastnread != NOCOUNT) {
 208                                 fprintf(msg, "eot\n");
 209                                 break;
 210                         }
 211                         fprintf(msg,
 212                             "file %d: eof after %ld records: %lld bytes\n",
 213                             filen, record, (long long)size);
 214                         needeof = 1;
 215                         filen++;
 216                         tsize += size;
 217                         size = record = lastrec = 0;
 218                         lastnread = 0;
 219                 }
 220                 lastnread = nread;
 221         }
 222         fprintf(msg, "total length: %lld bytes\n", (long long)tsize);
 223         (void)signal(SIGINT, oldsig);
 224         if (op == COPY || op == COPYVERIFY) {
 225                 writeop(outp, MTWEOF);
 226                 writeop(outp, MTWEOF);
 227                 if (op == COPYVERIFY) {
 228                         writeop(outp, MTREW);
 229                         writeop(inp, MTREW);
 230                         verify(inp, outp, buff);
 231                 }
 232         }
 233         exit(0);
 234 }
 235
 236 void
 237 verify(inp, outp, outb)
 238         int inp, outp;
 239         char *outb;
 240 {
 241         int eot, inmaxblk, inn, outmaxblk, outn;
 242         char *inb;
 243
 244         inb = getspace(maxblk);
 245         inmaxblk = outmaxblk = maxblk;
 246         for (eot = 0;; guesslen = 0) {
 247                 if ((inn = read(inp, inb, inmaxblk)) == -1) {
 248                         if (guesslen)
 249                                 while (errno == EINVAL && (inmaxblk -= 1024)) {
 250                                         inn = read(inp, inb, inmaxblk);
 251                                         if (inn >= 0)
 252                                                 goto r1;
 253                                 }
 254                         warn("read error");
 255                         break;
 256                 }
 257 r1:             if ((outn = read(outp, outb, outmaxblk)) == -1) {
 258                         if (guesslen)
 259                                 while (errno == EINVAL && (outmaxblk -= 1024)) {
 260                                         outn = read(outp, outb, outmaxblk);
 261                                         if (outn >= 0)
 262                                                 goto r2;
 263                                 }
 264                         warn("read error");
 265                         break;
 266                 }
 267 r2:             if (inn != outn) {
 268                         fprintf(msg,
 269                             "%s: tapes have different block sizes; %d != %d.\n",
 270                             "tcopy", inn, outn);
 271                         break;
 272                 }
 273                 if (!inn) {
 274                         if (eot++) {
 275                                 fprintf(msg, "%s: tapes are identical.\n",
 276                                         "tcopy");
 277                                 free(inb);
 278                                 return;
 279                         }
 280                 } else {
 281                         if (memcmp(inb, outb, inn)) {
 282                                 fprintf(msg,
 283                                     "%s: tapes have different data.\n",
 284                                         "tcopy");
 285                                 break;
 286                         }
 287                         eot = 0;
 288                 }
 289         }
 290         free(inb);
 291         exit(1);
 292 }
 293
 294 void
 295 intr(signo)
 296         int signo;
 297 {
 298         if (record) {
 299                 if (record - lastrec > 1)
 300                         fprintf(msg, "records %ld to %ld\n", lastrec, record);
 301                 else
 302                         fprintf(msg, "record %ld\n", lastrec);
 303         }
 304         fprintf(msg, "interrupt at file %d: record %ld\n", filen, record);
 305         fprintf(msg, "total length: %lld bytes\n", (long long)(tsize + size));
 306         (void)raise_default_signal(signo);
 307         exit(1);
 308 }
 309
 310 void *
 311 getspace(blk)
 312         int blk;
 313 {
 314         void *bp;
 315
 316         if ((bp = malloc((size_t)blk)) == NULL)
 317                 errx(11, "no memory");
 318
 319         return (bp);
 320 }
 321
 322 void
 323 writeop(fd, type)
 324         int fd, type;
 325 {
 326         struct mtop op;
 327
 328         op.mt_op = type;
 329         op.mt_count = (daddr_t)1;
 330         if (ioctl(fd, MTIOCTOP, (char *)&op) < 0)
 331                 err(6, "tape op");
 332 }
 333
 334 void
 335 usage()
 336 {
 337
 338         fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] src [dest]\n");
 339         exit(1);
 340 }