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
  34 #include <sys/cdefs.h>
  35
  36 #ifndef lint
  37 static const char copyright[] =
  38 "@(#) Copyright (c) 1985, 1987, 1993\n\
  39         The Regents of the University of California.  All rights reserved.\n";
  40 #endif
  41
  42 #ifndef lint
  43 static const char sccsid[] = "@(#)tcopy.c       8.2 (Berkeley) 4/17/94";
  44 #endif
  45
  46 #include <sys/types.h>
  47 #include <sys/stat.h>
  48 #include <sys/ioctl.h>
  49 #include <sys/mtio.h>
  50
  51 #include <err.h>
  52 #include <errno.h>
  53 #include <fcntl.h>
  54 #include <paths.h>
  55 #include <signal.h>
  56 #include <stdint.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <unistd.h>
  61
  62 #define MAXREC  (64 * 1024)
  63 #define NOCOUNT (-2)
  64
  65 int     filen, guesslen, maxblk = MAXREC;
  66 u_int64_t       lastrec, record, size, tsize;
  67 FILE    *msg;
  68
  69 void    *getspace(int);
  70 void     intr(int);
  71 static void      usage(void);
  72 void     verify(int, int, char *);
  73 void     writeop(int, int);
  74 void    rewind_tape(int);
  75
  76 int
  77 main(argc, argv)
  78         int argc;
  79         char *argv[];
  80 {
  81         register int lastnread, nread, nw, inp, outp;
  82         enum {READ, VERIFY, COPY, COPYVERIFY} op = READ;
  83         sig_t oldsig;
  84         int ch, needeof;
  85         char *buff;
  86         const char *inf;
  87
  88         msg = stdout;
  89         guesslen = 1;
  90         while ((ch = getopt(argc, argv, "cs:vx")) != -1)
  91                 switch((char)ch) {
  92                 case 'c':
  93                         op = COPYVERIFY;
  94                         break;
  95                 case 's':
  96                         maxblk = atoi(optarg);
  97                         if (maxblk <= 0) {
  98                                 warnx("illegal block size");
  99                                 usage();
 100                         }
 101                         guesslen = 0;
 102                         break;
 103                 case 'v':
 104                         op = VERIFY;
 105                         break;
 106                 case 'x':
 107                         msg = stderr;
 108                         break;
 109                 case '?':
 110                 default:
 111                         usage();
 112                 }
 113         argc -= optind;
 114         argv += optind;
 115
 116         switch(argc) {
 117         case 0:
 118                 if (op != READ)
 119                         usage();
 120                 inf = _PATH_DEFTAPE;
 121                 break;
 122         case 1:
 123                 if (op != READ)
 124                         usage();
 125                 inf = argv[0];
 126                 break;
 127         case 2:
 128                 if (op == READ)
 129                         op = COPY;
 130                 inf = argv[0];
 131                 if ((outp = open(argv[1], op == VERIFY ? O_RDONLY :
 132                     op == COPY ? O_WRONLY : O_RDWR, DEFFILEMODE)) < 0)
 133                         err(3, "%s", argv[1]);
 134                 break;
 135         default:
 136                 usage();
 137         }
 138
 139         if ((inp = open(inf, O_RDONLY, 0)) < 0)
 140                 err(1, "%s", inf);
 141
 142         buff = getspace(maxblk);
 143
 144         if (op == VERIFY) {
 145                 verify(inp, outp, buff);
 146                 exit(0);
 147         }
 148
 149         if ((oldsig = signal(SIGINT, SIG_IGN)) != SIG_IGN)
 150                 (void) signal(SIGINT, intr);
 151
 152         needeof = 0;
 153         for (lastnread = NOCOUNT;;) {
 154                 if ((nread = read(inp, buff, maxblk)) == -1) {
 155                         while (errno == EINVAL && (maxblk -= 1024)) {
 156                                 nread = read(inp, buff, maxblk);
 157                                 if (nread >= 0)
 158                                         goto r1;
 159                         }
 160                         err(1, "read error, file %d, record %qu", filen, record);
 161                 } else if (nread != lastnread) {
 162                         if (lastnread != 0 && lastnread != NOCOUNT) {
 163                                 if (lastrec == 0 && nread == 0)
 164                                         fprintf(msg, "%qu records\n", record);
 165                                 else if (record - lastrec > 1)
 166                                         fprintf(msg, "records %qu to %qu\n",
 167                                             lastrec, record);
 168                                 else
 169                                         fprintf(msg, "record %qu\n", lastrec);
 170                         }
 171                         if (nread != 0)
 172                                 fprintf(msg, "file %d: block size %d: ",
 173                                     filen, nread);
 174                         (void) fflush(stdout);
 175                         lastrec = record;
 176                 }
 177 r1:             guesslen = 0;
 178                 if (nread > 0) {
 179                         if (op == COPY || op == COPYVERIFY) {
 180                                 if (needeof) {
 181                                         writeop(outp, MTWEOF);
 182                                         needeof = 0;
 183                                 }
 184                                 nw = write(outp, buff, nread);
 185                                 if (nw != nread) {
 186                                         if (nw == -1) {
 187                                         warn("write error, file %d, record %qu", filen, record);
 188                                         } else {
 189                                         warnx("write error, file %d, record %qu", filen, record);
 190                                         warnx("write (%d) != read (%d)", nw, nread);
 191                                         }
 192                                         errx(5, "copy aborted");
 193                                 }
 194                         }
 195                         size += nread;
 196                         record++;
 197                 } else {
 198                         if (lastnread <= 0 && lastnread != NOCOUNT) {
 199                                 fprintf(msg, "eot\n");
 200                                 break;
 201                         }
 202                         fprintf(msg,
 203                             "file %d: eof after %qu records: %qu bytes\n",
 204                             filen, record, size);
 205                         needeof = 1;
 206                         filen++;
 207                         tsize += size;
 208                         size = record = lastrec = 0;
 209                         lastnread = 0;
 210                 }
 211                 lastnread = nread;
 212         }
 213         fprintf(msg, "total length: %qu bytes\n", tsize);
 214         (void)signal(SIGINT, oldsig);
 215         if (op == COPY || op == COPYVERIFY) {
 216                 writeop(outp, MTWEOF);
 217                 writeop(outp, MTWEOF);
 218                 if (op == COPYVERIFY) {
 219                         rewind_tape(outp);
 220                         rewind_tape(inp);
 221                         verify(inp, outp, buff);
 222                 }
 223         }
 224         exit(0);
 225 }
 226
 227 void
 228 verify(inp, outp, outb)
 229         register int inp, outp;
 230         register char *outb;
 231 {
 232         register int eot, inmaxblk, inn, outmaxblk, outn;
 233         register char *inb;
 234
 235         inb = getspace(maxblk);
 236         inmaxblk = outmaxblk = maxblk;
 237         for (eot = 0;; guesslen = 0) {
 238                 if ((inn = read(inp, inb, inmaxblk)) == -1) {
 239                         if (guesslen)
 240                                 while (errno == EINVAL && (inmaxblk -= 1024)) {
 241                                         inn = read(inp, inb, inmaxblk);
 242                                         if (inn >= 0)
 243                                                 goto r1;
 244                                 }
 245                         warn("read error");
 246                         break;
 247                 }
 248 r1:             if ((outn = read(outp, outb, outmaxblk)) == -1) {
 249                         if (guesslen)
 250                                 while (errno == EINVAL && (outmaxblk -= 1024)) {
 251                                         outn = read(outp, outb, outmaxblk);
 252                                         if (outn >= 0)
 253                                                 goto r2;
 254                                 }
 255                         warn("read error");
 256                         break;
 257                 }
 258 r2:             if (inn != outn) {
 259                         fprintf(msg,
 260                             "%s: tapes have different block sizes; %d != %d.\n",
 261                             "tcopy", inn, outn);
 262                         break;
 263                 }
 264                 if (!inn) {
 265                         if (eot++) {
 266                                 fprintf(msg, "tcopy: tapes are identical.\n");
 267                                 return;
 268                         }
 269                 } else {
 270                         if (bcmp(inb, outb, inn)) {
 271                                 fprintf(msg,
 272                                     "tcopy: tapes have different data.\n");
 273                                 break;
 274                         }
 275                         eot = 0;
 276                 }
 277         }
 278         exit(1);
 279 }
 280
 281 void
 282 intr(signo)
 283         int signo __unused;
 284 {
 285         if (record) {
 286                 if (record - lastrec > 1)
 287                         fprintf(msg, "records %qu to %qu\n", lastrec, record);
 288                 else
 289                         fprintf(msg, "record %qu\n", lastrec);
 290         }
 291         fprintf(msg, "interrupt at file %d: record %qu\n", filen, record);
 292         fprintf(msg, "total length: %ju bytes\n", (uintmax_t)(tsize + size));
 293         exit(1);
 294 }
 295
 296 void *
 297 getspace(blk)
 298         int blk;
 299 {
 300         void *bp;
 301
 302         if ((bp = malloc((size_t)blk)) == NULL)
 303                 errx(11, "no memory");
 304         return (bp);
 305 }
 306
 307 void
 308 writeop(fd, type)
 309         int fd, type;
 310 {
 311         struct mtop op;
 312
 313         op.mt_op = type;
 314         op.mt_count = (daddr_t)1;
 315         if (ioctl(fd, MTIOCTOP, (char *)&op) < 0)
 316                 err(6, "tape op");
 317 }
 318
 319 static void
 320 usage()
 321 {
 322         fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] [src [dest]]\n");
 323         exit(1);
 324 }
 325
 326 void
 327 rewind_tape(int fd)
 328 {
 329         struct stat sp;
 330
 331         if(fstat(fd, &sp))
 332                 errx(12, "fstat in rewind");
 333
 334         /*
 335          * don't want to do tape ioctl on regular files:
 336          */
 337         if( S_ISREG(sp.st_mode) ) {
 338                 if( lseek(fd, 0, SEEK_SET) == -1 )
 339                         errx(13, "lseek");
 340         } else
 341                 /*  assume its a tape   */
 342                 writeop(fd, MTREW);
 343 }