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
  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 }