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  */
  33
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/mtio.h>
  38
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <signal.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47
  48 #include "pathnames.h"
  49
  50 #define MAXREC  (64 * 1024)
  51 #define NOCOUNT (-2)
  52
  53 int     filen, guesslen, maxblk = MAXREC;
  54 u_int64_t       lastrec, record, size, tsize;
  55 FILE    *msg;
  56
  57 void    *getspace(int);
  58 void     intr(int);
  59 static void      usage(void);
  60 void     verify(int, int, char *);
  61 void     writeop(int, int);
  62 void    rewind_tape(int);
  63
  64 int
  65 main(int argc, char **argv)
  66 {
  67         int lastnread, nread, nw, inp, outp;
  68         enum {READ, VERIFY, COPY, COPYVERIFY} op = READ;
  69         sig_t oldsig;
  70         int ch, needeof;
  71         char *buff, *inf;
  72
  73         msg = stdout;
  74         guesslen = 1;
  75         while ((ch = getopt(argc, argv, "cs:vx")) != -1)
  76                 switch((char)ch) {
  77                 case 'c':
  78                         op = COPYVERIFY;
  79                         break;
  80                 case 's':
  81                         maxblk = atoi(optarg);
  82                         if (maxblk <= 0) {
  83                                 warnx("illegal block size");
  84                                 usage();
  85                         }
  86                         guesslen = 0;
  87                         break;
  88                 case 'v':
  89                         op = VERIFY;
  90                         break;
  91                 case 'x':
  92                         msg = stderr;
  93                         break;
  94                 case '?':
  95                 default:
  96                         usage();
  97                 }
  98         argc -= optind;
  99         argv += optind;
 100
 101         switch(argc) {
 102         case 0:
 103                 if (op != READ)
 104                         usage();
 105                 inf = _PATH_DEFTAPE;
 106                 break;
 107         case 1:
 108                 if (op != READ)
 109                         usage();
 110                 inf = argv[0];
 111                 break;
 112         case 2:
 113                 if (op == READ)
 114                         op = COPY;
 115                 inf = argv[0];
 116                 if ((outp = open(argv[1], op == VERIFY ? O_RDONLY :
 117                     op == COPY ? O_WRONLY : O_RDWR, DEFFILEMODE)) < 0)
 118                         err(3, "%s", argv[1]);
 119                 break;
 120         default:
 121                 usage();
 122         }
 123
 124         if ((inp = open(inf, O_RDONLY, 0)) < 0)
 125                 err(1, "%s", inf);
 126
 127         buff = getspace(maxblk);
 128
 129         if (op == VERIFY) {
 130                 verify(inp, outp, buff);
 131                 exit(0);
 132         }
 133
 134         if ((oldsig = signal(SIGINT, SIG_IGN)) != SIG_IGN)
 135                 (void) signal(SIGINT, intr);
 136
 137         needeof = 0;
 138         for (lastnread = NOCOUNT;;) {
 139                 if ((nread = read(inp, buff, maxblk)) == -1) {
 140                         while (errno == EINVAL && (maxblk -= 1024)) {
 141                                 nread = read(inp, buff, maxblk);
 142                                 if (nread >= 0)
 143                                         goto r1;
 144                         }
 145                         err(1, "read error, file %d, record %ju", filen,
 146                             (uintmax_t)record);
 147                 } else if (nread != lastnread) {
 148                         if (lastnread != 0 && lastnread != NOCOUNT) {
 149                                 if (lastrec == 0 && nread == 0)
 150                                         fprintf(msg, "%ju records\n",
 151                                             (uintmax_t)record);
 152                                 else if (record - lastrec > 1)
 153                                         fprintf(msg, "records %ju to %ju\n",
 154                                             (uintmax_t)lastrec,
 155                                             (uintmax_t)record);
 156                                 else
 157                                         fprintf(msg, "record %ju\n",
 158                                             (uintmax_t)lastrec);
 159                         }
 160                         if (nread != 0)
 161                                 fprintf(msg, "file %d: block size %d: ",
 162                                     filen, nread);
 163                         (void) fflush(stdout);
 164                         lastrec = record;
 165                 }
 166 r1:             guesslen = 0;
 167                 if (nread > 0) {
 168                         if (op == COPY || op == COPYVERIFY) {
 169                                 if (needeof) {
 170                                         writeop(outp, MTWEOF);
 171                                         needeof = 0;
 172                                 }
 173                                 nw = write(outp, buff, nread);
 174                                 if (nw != nread) {
 175                                         if (nw == -1) {
 176                                         warn("write error, file %d, record %ju",
 177                                             filen, (uintmax_t)record);
 178                                         } else {
 179                                         warnx("write error, file %d, record %ju",
 180                                             filen, (uintmax_t)record);
 181                                         warnx("write (%d) != read (%d)", nw, nread);
 182                                         }
 183                                         errx(5, "copy aborted");
 184                                 }
 185                         }
 186                         size += nread;
 187                         record++;
 188                 } else {
 189                         if (lastnread <= 0 && lastnread != NOCOUNT) {
 190                                 fprintf(msg, "eot\n");
 191                                 break;
 192                         }
 193                         fprintf(msg,
 194                             "file %d: eof after %ju records: %ju bytes\n",
 195                             filen, (uintmax_t)record, (uintmax_t)size);
 196                         needeof = 1;
 197                         filen++;
 198                         tsize += size;
 199                         size = record = lastrec = 0;
 200                         lastnread = 0;
 201                 }
 202                 lastnread = nread;
 203         }
 204         fprintf(msg, "total length: %ju bytes\n", (uintmax_t)tsize);
 205         (void)signal(SIGINT, oldsig);
 206         if (op == COPY || op == COPYVERIFY) {
 207                 writeop(outp, MTWEOF);
 208                 writeop(outp, MTWEOF);
 209                 if (op == COPYVERIFY) {
 210                         rewind_tape(outp);
 211                         rewind_tape(inp);
 212                         verify(inp, outp, buff);
 213                 }
 214         }
 215         exit(0);
 216 }
 217
 218 void
 219 verify(int inp, int outp, char *outb)
 220 {
 221         int eot, inmaxblk, inn, outmaxblk, outn;
 222         char *inb;
 223
 224         inb = getspace(maxblk);
 225         inmaxblk = outmaxblk = maxblk;
 226         for (eot = 0;; guesslen = 0) {
 227                 if ((inn = read(inp, inb, inmaxblk)) == -1) {
 228                         if (guesslen)
 229                                 while (errno == EINVAL && (inmaxblk -= 1024)) {
 230                                         inn = read(inp, inb, inmaxblk);
 231                                         if (inn >= 0)
 232                                                 goto r1;
 233                                 }
 234                         warn("read error");
 235                         break;
 236                 }
 237 r1:             if ((outn = read(outp, outb, outmaxblk)) == -1) {
 238                         if (guesslen)
 239                                 while (errno == EINVAL && (outmaxblk -= 1024)) {
 240                                         outn = read(outp, outb, outmaxblk);
 241                                         if (outn >= 0)
 242                                                 goto r2;
 243                                 }
 244                         warn("read error");
 245                         break;
 246                 }
 247 r2:             if (inn != outn) {
 248                         fprintf(msg,
 249                             "%s: tapes have different block sizes; %d != %d.\n",
 250                             "tcopy", inn, outn);
 251                         break;
 252                 }
 253                 if (!inn) {
 254                         if (eot++) {
 255                                 fprintf(msg, "tcopy: tapes are identical.\n");
 256                                 return;
 257                         }
 258                 } else {
 259                         if (bcmp(inb, outb, inn)) {
 260                                 fprintf(msg,
 261                                     "tcopy: tapes have different data.\n");
 262                                 break;
 263                         }
 264                         eot = 0;
 265                 }
 266         }
 267         exit(1);
 268 }
 269
 270 void
 271 intr(int signo)
 272 {
 273         if (record) {
 274                 if (record - lastrec > 1)
 275                         fprintf(msg, "records %ju to %ju\n",
 276                             (uintmax_t)lastrec, (uintmax_t)record);
 277                 else
 278                         fprintf(msg, "record %ju\n", (uintmax_t)lastrec);
 279         }
 280         fprintf(msg, "interrupt at file %d: record %ju\n", filen,
 281             (uintmax_t)record);
 282         fprintf(msg, "total length: %ju bytes\n", (uintmax_t)tsize + size);
 283         exit(1);
 284 }
 285
 286 void *
 287 getspace(int blk)
 288 {
 289         void *bp;
 290
 291         if ((bp = malloc((size_t)blk)) == NULL)
 292                 errx(11, "no memory");
 293         return (bp);
 294 }
 295
 296 void
 297 writeop(int fd, int type)
 298 {
 299         struct mtop op;
 300
 301         op.mt_op = type;
 302         op.mt_count = (daddr_t)1;
 303         if (ioctl(fd, MTIOCTOP, (char *)&op) < 0)
 304                 err(6, "tape op");
 305 }
 306
 307 static void
 308 usage(void)
 309 {
 310         fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] [src [dest]]\n");
 311         exit(1);
 312 }
 313
 314 void
 315 rewind_tape(int fd)
 316 {
 317         struct stat sp;
 318
 319         if(fstat(fd, &sp))
 320                 errx(12, "fstat in rewind");
 321
 322         /*
 323          * don't want to do tape ioctl on regular files:
 324          */
 325         if( S_ISREG(sp.st_mode) ) {
 326                 if( lseek(fd, 0, SEEK_SET) == -1 )
 327                         errx(13, "lseek");
 328         } else
 329                 /*  assume its a tape   */
 330                 writeop(fd, MTREW);
 331 }