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. 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  * @(#) Copyright (c) 1985, 1987, 1993 The Regents of the University of California.  All rights reserved.
  30  * @(#)tcopy.c  8.2 (Berkeley) 4/17/94
  31  * $FreeBSD: src/usr.bin/tcopy/tcopy.c,v 1.7.2.1 2002/11/07 17:54:42 imp Exp $
  32  * $DragonFly: src/usr.bin/tcopy/tcopy.c,v 1.4 2008/10/16 01:52:33 swildner Exp $
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37 #include <sys/ioctl.h>
  38 #include <sys/mtio.h>
  39
  40 #include <err.h>
  41 #include <errno.h>
  42 #include <fcntl.h>
  43 #include <signal.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <unistd.h>
  48
  49 #include "pathnames.h"
  50
  51 #define MAXREC  (64 * 1024)
  52 #define NOCOUNT (-2)
  53
  54 int     filen, guesslen, maxblk = MAXREC;
  55 u_int64_t       lastrec, record, size, tsize;
  56 FILE    *msg;
  57
  58 void    *getspace(int);
  59 void     intr(int);
  60 static void      usage(void);
  61 void     verify(int, int, char *);
  62 void     writeop(int, int);
  63 void    rewind_tape(int);
  64
  65 int
  66 main(int argc, char **argv)
  67 {
  68         int lastnread, nread, nw, inp, outp;
  69         enum {READ, VERIFY, COPY, COPYVERIFY} op = READ;
  70         sig_t oldsig;
  71         int ch, needeof;
  72         char *buff, *inf;
  73
  74         msg = stdout;
  75         guesslen = 1;
  76         while ((ch = getopt(argc, argv, "cs:vx")) != -1)
  77                 switch((char)ch) {
  78                 case 'c':
  79                         op = COPYVERIFY;
  80                         break;
  81                 case 's':
  82                         maxblk = atoi(optarg);
  83                         if (maxblk <= 0) {
  84                                 warnx("illegal block size");
  85                                 usage();
  86                         }
  87                         guesslen = 0;
  88                         break;
  89                 case 'v':
  90                         op = VERIFY;
  91                         break;
  92                 case 'x':
  93                         msg = stderr;
  94                         break;
  95                 case '?':
  96                 default:
  97                         usage();
  98                 }
  99         argc -= optind;
 100         argv += optind;
 101
 102         switch(argc) {
 103         case 0:
 104                 if (op != READ)
 105                         usage();
 106                 inf = _PATH_DEFTAPE;
 107                 break;
 108         case 1:
 109                 if (op != READ)
 110                         usage();
 111                 inf = argv[0];
 112                 break;
 113         case 2:
 114                 if (op == READ)
 115                         op = COPY;
 116                 inf = argv[0];
 117                 if ((outp = open(argv[1], op == VERIFY ? O_RDONLY :
 118                     op == COPY ? O_WRONLY : O_RDWR, DEFFILEMODE)) < 0)
 119                         err(3, "%s", argv[1]);
 120                 break;
 121         default:
 122                 usage();
 123         }
 124
 125         if ((inp = open(inf, O_RDONLY, 0)) < 0)
 126                 err(1, "%s", inf);
 127
 128         buff = getspace(maxblk);
 129
 130         if (op == VERIFY) {
 131                 verify(inp, outp, buff);
 132                 exit(0);
 133         }
 134
 135         if ((oldsig = signal(SIGINT, SIG_IGN)) != SIG_IGN)
 136                 (void) signal(SIGINT, intr);
 137
 138         needeof = 0;
 139         for (lastnread = NOCOUNT;;) {
 140                 if ((nread = read(inp, buff, maxblk)) == -1) {
 141                         while (errno == EINVAL && (maxblk -= 1024)) {
 142                                 nread = read(inp, buff, maxblk);
 143                                 if (nread >= 0)
 144                                         goto r1;
 145                         }
 146                         err(1, "read error, file %d, record %qu", filen, record);
 147                 } else if (nread != lastnread) {
 148                         if (lastnread != 0 && lastnread != NOCOUNT) {
 149                                 if (lastrec == 0 && nread == 0)
 150                                         fprintf(msg, "%qu records\n", record);
 151                                 else if (record - lastrec > 1)
 152                                         fprintf(msg, "records %qu to %qu\n",
 153                                             lastrec, record);
 154                                 else
 155                                         fprintf(msg, "record %qu\n", lastrec);
 156                         }
 157                         if (nread != 0)
 158                                 fprintf(msg, "file %d: block size %d: ",
 159                                     filen, nread);
 160                         (void) fflush(stdout);
 161                         lastrec = record;
 162                 }
 163 r1:             guesslen = 0;
 164                 if (nread > 0) {
 165                         if (op == COPY || op == COPYVERIFY) {
 166                                 if (needeof) {
 167                                         writeop(outp, MTWEOF);
 168                                         needeof = 0;
 169                                 }
 170                                 nw = write(outp, buff, nread);
 171                                 if (nw != nread) {
 172                                         if (nw == -1) {
 173                                         warn("write error, file %d, record %qu", filen, record);
 174                                         } else {
 175                                         warnx("write error, file %d, record %qu", filen, record);
 176                                         warnx("write (%d) != read (%d)", nw, nread);
 177                                         }
 178                                         errx(5, "copy aborted");
 179                                 }
 180                         }
 181                         size += nread;
 182                         record++;
 183                 } else {
 184                         if (lastnread <= 0 && lastnread != NOCOUNT) {
 185                                 fprintf(msg, "eot\n");
 186                                 break;
 187                         }
 188                         fprintf(msg,
 189                             "file %d: eof after %qu records: %qu bytes\n",
 190                             filen, record, size);
 191                         needeof = 1;
 192                         filen++;
 193                         tsize += size;
 194                         size = record = lastrec = 0;
 195                         lastnread = 0;
 196                 }
 197                 lastnread = nread;
 198         }
 199         fprintf(msg, "total length: %qu bytes\n", tsize);
 200         (void)signal(SIGINT, oldsig);
 201         if (op == COPY || op == COPYVERIFY) {
 202                 writeop(outp, MTWEOF);
 203                 writeop(outp, MTWEOF);
 204                 if (op == COPYVERIFY) {
 205                         rewind_tape(outp);
 206                         rewind_tape(inp);
 207                         verify(inp, outp, buff);
 208                 }
 209         }
 210         exit(0);
 211 }
 212
 213 void
 214 verify(int inp, int outp, char *outb)
 215 {
 216         int eot, inmaxblk, inn, outmaxblk, outn;
 217         char *inb;
 218
 219         inb = getspace(maxblk);
 220         inmaxblk = outmaxblk = maxblk;
 221         for (eot = 0;; guesslen = 0) {
 222                 if ((inn = read(inp, inb, inmaxblk)) == -1) {
 223                         if (guesslen)
 224                                 while (errno == EINVAL && (inmaxblk -= 1024)) {
 225                                         inn = read(inp, inb, inmaxblk);
 226                                         if (inn >= 0)
 227                                                 goto r1;
 228                                 }
 229                         warn("read error");
 230                         break;
 231                 }
 232 r1:             if ((outn = read(outp, outb, outmaxblk)) == -1) {
 233                         if (guesslen)
 234                                 while (errno == EINVAL && (outmaxblk -= 1024)) {
 235                                         outn = read(outp, outb, outmaxblk);
 236                                         if (outn >= 0)
 237                                                 goto r2;
 238                                 }
 239                         warn("read error");
 240                         break;
 241                 }
 242 r2:             if (inn != outn) {
 243                         fprintf(msg,
 244                             "%s: tapes have different block sizes; %d != %d.\n",
 245                             "tcopy", inn, outn);
 246                         break;
 247                 }
 248                 if (!inn) {
 249                         if (eot++) {
 250                                 fprintf(msg, "tcopy: tapes are identical.\n");
 251                                 return;
 252                         }
 253                 } else {
 254                         if (bcmp(inb, outb, inn)) {
 255                                 fprintf(msg,
 256                                     "tcopy: tapes have different data.\n");
 257                                 break;
 258                         }
 259                         eot = 0;
 260                 }
 261         }
 262         exit(1);
 263 }
 264
 265 void
 266 intr(int signo)
 267 {
 268         if (record) {
 269                 if (record - lastrec > 1)
 270                         fprintf(msg, "records %qu to %qu\n", lastrec, record);
 271                 else
 272                         fprintf(msg, "record %qu\n", lastrec);
 273         }
 274         fprintf(msg, "interrupt at file %d: record %qu\n", filen, record);
 275         fprintf(msg, "total length: %ld bytes\n", tsize + size);
 276         exit(1);
 277 }
 278
 279 void *
 280 getspace(int blk)
 281 {
 282         void *bp;
 283
 284         if ((bp = malloc((size_t)blk)) == NULL)
 285                 errx(11, "no memory");
 286         return (bp);
 287 }
 288
 289 void
 290 writeop(int fd, int type)
 291 {
 292         struct mtop op;
 293
 294         op.mt_op = type;
 295         op.mt_count = (daddr_t)1;
 296         if (ioctl(fd, MTIOCTOP, (char *)&op) < 0)
 297                 err(6, "tape op");
 298 }
 299
 300 static void
 301 usage(void)
 302 {
 303         fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] [src [dest]]\n");
 304         exit(1);
 305 }
 306
 307 void
 308 rewind_tape(int fd)
 309 {
 310         struct stat sp;
 311
 312         if(fstat(fd, &sp))
 313                 errx(12, "fstat in rewind");
 314
 315         /*
 316          * don't want to do tape ioctl on regular files:
 317          */
 318         if( S_ISREG(sp.st_mode) ) {
 319                 if( lseek(fd, 0, SEEK_SET) == -1 )
 320                         errx(13, "lseek");
 321         } else
 322                 /*  assume its a tape   */
 323                 writeop(fd, MTREW);
 324 }