323 lines
7.5 KiB
C
323 lines
7.5 KiB
C
/*
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* Copyright (c) 1985, 1987, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1985, 1987, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)tcopy.c 8.2 (Berkeley) 4/17/94";
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#endif
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static const char rcsid[] =
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"$Id$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/mtio.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "pathnames.h"
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#define MAXREC (64 * 1024)
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#define NOCOUNT (-2)
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int filen, guesslen, maxblk = MAXREC;
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u_long lastrec, record, size, tsize;
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FILE *msg = stdout;
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void *getspace __P((int));
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void intr __P((int));
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static void usage __P((void));
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void verify __P((int, int, char *));
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void writeop __P((int, int));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register int lastnread, nread, nw, inp, outp;
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enum {READ, VERIFY, COPY, COPYVERIFY} op = READ;
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sig_t oldsig;
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int ch, needeof;
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char *buff, *inf;
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guesslen = 1;
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while ((ch = getopt(argc, argv, "cs:vx")) != -1)
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switch((char)ch) {
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case 'c':
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op = COPYVERIFY;
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break;
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case 's':
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maxblk = atoi(optarg);
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if (maxblk <= 0) {
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warnx("illegal block size");
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usage();
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}
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guesslen = 0;
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break;
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case 'v':
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op = VERIFY;
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break;
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case 'x':
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msg = stderr;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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switch(argc) {
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case 0:
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if (op != READ)
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usage();
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inf = _PATH_DEFTAPE;
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break;
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case 1:
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if (op != READ)
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usage();
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inf = argv[0];
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break;
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case 2:
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if (op == READ)
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op = COPY;
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inf = argv[0];
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if ((outp = open(argv[1], op == VERIFY ? O_RDONLY :
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op == COPY ? O_WRONLY : O_RDWR, DEFFILEMODE)) < 0)
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err(3, "%s", argv[1]);
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break;
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default:
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usage();
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}
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if ((inp = open(inf, O_RDONLY, 0)) < 0)
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err(1, "%s", inf);
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buff = getspace(maxblk);
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if (op == VERIFY) {
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verify(inp, outp, buff);
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exit(0);
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}
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if ((oldsig = signal(SIGINT, SIG_IGN)) != SIG_IGN)
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(void) signal(SIGINT, intr);
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needeof = 0;
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for (lastnread = NOCOUNT;;) {
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if ((nread = read(inp, buff, maxblk)) == -1) {
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while (errno == EINVAL && (maxblk -= 1024)) {
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nread = read(inp, buff, maxblk);
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if (nread >= 0)
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goto r1;
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}
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err(1, "read error, file %d, record %ld", filen, record);
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} else if (nread != lastnread) {
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if (lastnread != 0 && lastnread != NOCOUNT) {
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if (lastrec == 0 && nread == 0)
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fprintf(msg, "%ld records\n", record);
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else if (record - lastrec > 1)
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fprintf(msg, "records %ld to %ld\n",
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lastrec, record);
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else
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fprintf(msg, "record %ld\n", lastrec);
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}
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if (nread != 0)
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fprintf(msg, "file %d: block size %d: ",
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filen, nread);
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(void) fflush(stdout);
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lastrec = record;
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}
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r1: guesslen = 0;
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if (nread > 0) {
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if (op == COPY || op == COPYVERIFY) {
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if (needeof) {
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writeop(outp, MTWEOF);
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needeof = 0;
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}
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nw = write(outp, buff, nread);
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if (nw != nread) {
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if (nw == -1) {
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warn("write error, file %d, record %ld", filen, record);
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} else {
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warnx("write error, file %d, record %ld", filen, record);
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warnx("write (%d) != read (%d)", nw, nread);
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}
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errx(5, "copy aborted");
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}
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}
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size += nread;
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record++;
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} else {
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if (lastnread <= 0 && lastnread != NOCOUNT) {
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fprintf(msg, "eot\n");
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break;
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}
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fprintf(msg,
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"file %d: eof after %lu records: %lu bytes\n",
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filen, record, size);
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needeof = 1;
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filen++;
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tsize += size;
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size = record = lastrec = 0;
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lastnread = 0;
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}
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lastnread = nread;
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}
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fprintf(msg, "total length: %lu bytes\n", tsize);
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(void)signal(SIGINT, oldsig);
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if (op == COPY || op == COPYVERIFY) {
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writeop(outp, MTWEOF);
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writeop(outp, MTWEOF);
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if (op == COPYVERIFY) {
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writeop(outp, MTREW);
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writeop(inp, MTREW);
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verify(inp, outp, buff);
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}
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}
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exit(0);
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}
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void
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verify(inp, outp, outb)
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register int inp, outp;
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register char *outb;
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{
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register int eot, inmaxblk, inn, outmaxblk, outn;
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register char *inb;
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inb = getspace(maxblk);
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inmaxblk = outmaxblk = maxblk;
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for (eot = 0;; guesslen = 0) {
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if ((inn = read(inp, inb, inmaxblk)) == -1) {
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if (guesslen)
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while (errno == EINVAL && (inmaxblk -= 1024)) {
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inn = read(inp, inb, inmaxblk);
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if (inn >= 0)
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goto r1;
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}
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warn("read error");
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break;
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}
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r1: if ((outn = read(outp, outb, outmaxblk)) == -1) {
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if (guesslen)
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while (errno == EINVAL && (outmaxblk -= 1024)) {
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outn = read(outp, outb, outmaxblk);
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if (outn >= 0)
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goto r2;
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}
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warn("read error");
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break;
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}
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r2: if (inn != outn) {
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fprintf(msg,
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"%s: tapes have different block sizes; %d != %d.\n",
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"tcopy", inn, outn);
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break;
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}
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if (!inn) {
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if (eot++) {
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fprintf(msg, "tcopy: tapes are identical.\n");
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return;
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}
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} else {
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if (bcmp(inb, outb, inn)) {
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fprintf(msg,
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"tcopy: tapes have different data.\n");
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break;
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}
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eot = 0;
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}
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}
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exit(1);
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}
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void
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intr(signo)
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int signo;
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{
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if (record)
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if (record - lastrec > 1)
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fprintf(msg, "records %ld to %ld\n", lastrec, record);
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else
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fprintf(msg, "record %ld\n", lastrec);
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fprintf(msg, "interrupt at file %d: record %ld\n", filen, record);
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fprintf(msg, "total length: %ld bytes\n", tsize + size);
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exit(1);
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}
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void *
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getspace(blk)
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int blk;
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{
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void *bp;
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if ((bp = malloc((size_t)blk)) == NULL)
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errx(11, "no memory");
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return (bp);
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}
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void
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writeop(fd, type)
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int fd, type;
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{
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struct mtop op;
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op.mt_op = type;
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op.mt_count = (daddr_t)1;
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if (ioctl(fd, MTIOCTOP, (char *)&op) < 0)
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err(6, "tape op");
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}
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static void
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usage()
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{
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fprintf(stderr, "usage: tcopy [-cvx] [-s maxblk] [src [dest]]\n");
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exit(1);
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}
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