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