4.3BSD-Reno/src/usr.bin/tcopy/tcopy.c
/*
* Copyright (c) 1985, 1987 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1985, 1987 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)tcopy.c 5.14 (Berkeley) 6/1/90";
#endif /* not lint */
#include <sys/types.h>
#include <sys/signal.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/mtio.h>
#include <sys/errno.h>
#include <stdio.h>
#include "pathnames.h"
#define MAXREC (64 * 1024)
#define NOCOUNT (-2)
int filen, guesslen, maxblk = MAXREC;
long lastrec, record, size, tsize;
main(argc, argv)
int argc;
char **argv;
{
extern char *optarg;
extern int optind, errno;
register int lastnread, nread, nw, inp, outp;
enum {READ, VERIFY, COPY, COPYVERIFY} op = READ;
sig_t oldsig;
int ch, needeof;
char *buff, *inf, *getspace();
void intr();
guesslen = 1;
while ((ch = getopt(argc, argv, "cs:v")) != EOF)
switch((char)ch) {
case 'c':
op = COPYVERIFY;
break;
case 's':
maxblk = atoi(optarg);
if (maxblk <= 0) {
fprintf(stderr, "tcopy: illegal block size\n");
usage();
}
guesslen = 0;
break;
case 'v':
op = VERIFY;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
switch(argc) {
case 0:
if (op != READ)
usage();
inf = _PATH_DEFTAPE;
break;
case 1:
if (op != READ)
usage();
inf = argv[0];
break;
case 2:
if (op == READ)
op = COPY;
inf = argv[0];
if ((outp = open(argv[1], op == VERIFY ? O_RDONLY : O_RDWR,
0666)) < 0) {
perror(argv[1]);
exit(3);
}
break;
default:
usage();
}
if ((inp = open(inf, O_RDONLY, 0)) < 0) {
perror(inf);
exit(1);
}
buff = getspace(maxblk);
if (op == VERIFY) {
verify(inp, outp, buff);
exit(0);
}
if ((oldsig = signal(SIGINT, SIG_IGN)) != SIG_IGN)
(void) signal(SIGINT, intr);
needeof = 0;
for (lastnread = NOCOUNT;;) {
if ((nread = read(inp, buff, maxblk)) == -1) {
while (errno == EINVAL && (maxblk -= 1024)) {
nread = read(inp, buff, maxblk);
if (nread >= 0)
goto r1;
}
fprintf(stderr, "read error, file %d, record %ld: ",
filen, record);
perror("");
exit(1);
} else if (nread != lastnread) {
if (lastnread != 0 && lastnread != NOCOUNT) {
if (lastrec == 0 && nread == 0)
printf("%ld records\n", record);
else if (record - lastrec > 1)
printf("records %ld to %ld\n",
lastrec, record);
else
printf("record %ld\n", lastrec);
}
if (nread != 0)
printf("file %d: block size %d: ",
filen, nread);
(void) fflush(stdout);
lastrec = record;
}
r1: guesslen = 0;
if (nread > 0) {
if (op >= COPY) {
if (needeof) {
writeop(outp, MTWEOF);
needeof = 0;
}
nw = write(outp, buff, nread);
if (nw != nread) {
fprintf(stderr,
"write error, file %d, record %ld: ",
filen, record);
if (nw == -1)
perror("");
else
fprintf(stderr,
"write (%d) != read (%d)\n",
nw, nread);
fprintf(stderr, "copy aborted\n");
exit(5);
}
}
size += nread;
record++;
} else {
if (lastnread <= 0 && lastnread != NOCOUNT) {
printf("eot\n");
break;
}
printf("file %d: eof after %ld records: %ld bytes\n",
filen, record, size);
needeof = 1;
filen++;
tsize += size;
size = record = lastrec = 0;
lastnread = 0;
}
lastnread = nread;
}
printf("total length: %ld bytes\n", tsize);
(void)signal(SIGINT, oldsig);
if (op >= COPY) {
writeop(outp, MTWEOF);
writeop(outp, MTWEOF);
if (op == COPYVERIFY) {
writeop(outp, MTREW);
writeop(inp, MTREW);
verify(inp, outp, buff);
}
}
exit(0);
}
verify(inp, outp, outb)
register int inp, outp;
register char *outb;
{
extern int errno;
register int eot, inmaxblk, inn, outmaxblk, outn;
register char *inb;
char *getspace();
inb = getspace(maxblk);
inmaxblk = outmaxblk = maxblk;
for (eot = 0;; guesslen = 0) {
if ((inn = read(inp, inb, inmaxblk)) == -1) {
if (guesslen)
while (errno == EINVAL && (inmaxblk -= 1024)) {
inn = read(inp, inb, inmaxblk);
if (inn >= 0)
goto r1;
}
perror("tcopy: read error");
break;
}
r1: if ((outn = read(outp, outb, outmaxblk)) == -1) {
if (guesslen)
while (errno == EINVAL && (outmaxblk -= 1024)) {
outn = read(outp, outb, outmaxblk);
if (outn >= 0)
goto r2;
}
perror("tcopy: read error");
break;
}
r2: if (inn != outn) {
printf("tcopy: tapes have different block sizes; %d != %d.\n", inn, outn);
break;
}
if (!inn) {
if (eot++) {
printf("tcopy: tapes are identical.\n");
return;
}
} else {
if (bcmp(inb, outb, inn)) {
printf("tcopy: tapes have different data.\n");
break;
}
eot = 0;
}
}
exit(1);
}
void
intr()
{
if (record)
if (record - lastrec > 1)
printf("records %ld to %ld\n", lastrec, record);
else
printf("record %ld\n", lastrec);
printf("interrupt at file %d: record %ld\n", filen, record);
printf("total length: %ld bytes\n", tsize + size);
exit(1);
}
char *
getspace(blk)
int blk;
{
char *bp, *malloc();
if ((bp = malloc((u_int)blk)) == NULL) {
fprintf(stderr, "tcopy: no memory\n");
exit(11);
}
return(bp);
}
writeop(fd, type)
int fd, type;
{
struct mtop op;
op.mt_op = type;
op.mt_count = (daddr_t)1;
if (ioctl(fd, MTIOCTOP, (char *)&op) < 0) {
perror("tcopy: tape op");
exit(6);
}
}
usage()
{
fprintf(stderr, "usage: tcopy [-cv] [-s maxblk] src [dest]\n");
exit(1);
}