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/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1983, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)rmt.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$Id: rmt.c,v 1.1 1998/05/15 12:09:06 hans Exp hans $";
#endif /* not lint */
/*
* rmt
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/mtio.h>
#include <errno.h>
#include <fcntl.h>
#include <sgtty.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int tape = -1;
char *record;
int maxrecsize = -1;
#define SSIZE 64
char device[SSIZE];
char count[SSIZE], mode[SSIZE], pos[SSIZE], op[SSIZE];
char resp[BUFSIZ];
FILE *debug;
#define DEBUG(f) if (debug) fprintf(debug, f)
#define DEBUG1(f,a) if (debug) fprintf(debug, f, a)
#define DEBUG2(f,a1,a2) if (debug) fprintf(debug, f, a1, a2)
char *checkbuf __P((char *, int));
void error __P((int));
void getstring __P((char *));
int
main(argc, argv)
int argc;
char **argv;
{
int rval;
char c;
int n, i, cc;
argc--, argv++;
if (argc > 0) {
debug = fopen(*argv, "w");
if (debug == 0)
exit(1);
(void)setbuf(debug, (char *)0);
}
top:
errno = 0;
rval = 0;
if (read(0, &c, 1) != 1)
exit(0);
switch (c) {
case 'O':
if (tape >= 0)
(void) close(tape);
getstring(device);
getstring(mode);
DEBUG2("rmtd: O %s %s\n", device, mode);
/*
* XXX the rmt protocol does not provide a means to
* specify the permission bits; allow rw for everyone,
* as modified by the users umask
*/
tape = open(device, atoi(mode), 0666);
if (tape < 0)
goto ioerror;
goto respond;
case 'C':
DEBUG("rmtd: C\n");
getstring(device); /* discard */
if (close(tape) < 0)
goto ioerror;
tape = -1;
goto respond;
case 'L':
getstring(count);
getstring(pos);
DEBUG2("rmtd: L %s %s\n", count, pos);
rval = lseek(tape, (off_t)atol(count), atoi(pos));
if (rval < 0)
goto ioerror;
goto respond;
case 'W':
getstring(count);
n = atoi(count);
DEBUG1("rmtd: W %s\n", count);
record = checkbuf(record, n);
for (i = 0; i < n; i += cc) {
cc = read(0, &record[i], n - i);
if (cc <= 0) {
DEBUG("rmtd: premature eof\n");
exit(2);
}
}
rval = write(tape, record, n);
if (rval < 0)
goto ioerror;
goto respond;
case 'R':
getstring(count);
DEBUG1("rmtd: R %s\n", count);
n = atoi(count);
record = checkbuf(record, n);
rval = read(tape, record, n);
if (rval < 0)
goto ioerror;
(void)sprintf(resp, "A%d\n", rval);
(void)write(1, resp, strlen(resp));
(void)write(1, record, rval);
goto top;
case 'I':
getstring(op);
getstring(count);
DEBUG2("rmtd: I %s %s\n", op, count);
{ struct mtop mtop;
mtop.mt_op = atoi(op);
mtop.mt_count = atoi(count);
if (ioctl(tape, MTIOCTOP, (char *)&mtop) < 0)
goto ioerror;
rval = mtop.mt_count;
}
goto respond;
case 'S': /* status */
DEBUG("rmtd: S\n");
{ struct mtget mtget;
if (ioctl(tape, MTIOCGET, (char *)&mtget) < 0)
goto ioerror;
rval = sizeof (mtget);
(void)sprintf(resp, "A%d\n", rval);
(void)write(1, resp, strlen(resp));
(void)write(1, (char *)&mtget, sizeof (mtget));
goto top;
}
case 'V': /* version */
getstring(op);
DEBUG1("rmtd: V %s\n", op);
rval = 2;
goto respond;
default:
DEBUG1("rmtd: garbage command %c\n", c);
exit(3);
}
respond:
DEBUG1("rmtd: A %d\n", rval);
(void)sprintf(resp, "A%d\n", rval);
(void)write(1, resp, strlen(resp));
goto top;
ioerror:
error(errno);
goto top;
}
void
getstring(bp)
char *bp;
{
int i;
char *cp = bp;
for (i = 0; i < SSIZE; i++) {
if (read(0, cp+i, 1) != 1)
exit(0);
if (cp[i] == '\n')
break;
}
cp[i] = '\0';
}
char *
checkbuf(record, size)
char *record;
int size;
{
if (size <= maxrecsize)
return (record);
if (record != 0)
free(record);
record = malloc(size);
if (record == 0) {
DEBUG("rmtd: cannot allocate buffer space\n");
exit(4);
}
maxrecsize = size;
while (size > 1024 &&
setsockopt(0, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)) < 0)
size -= 1024;
return (record);
}
void
error(num)
int num;
{
DEBUG2("rmtd: E %d (%s)\n", num, strerror(num));
(void)snprintf(resp, sizeof(resp), "E%d\n%s\n", num, strerror(num));
(void)write(1, resp, strlen(resp));
}
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