OpenBSD-4.6/bin/mt/mt.c
/* $OpenBSD: mt.c,v 1.29 2006/06/14 02:14:25 krw Exp $ */
/* $NetBSD: mt.c,v 1.14.2.1 1996/05/27 15:12:11 mrg Exp $ */
/*
* Copyright (c) 1980, 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. 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 char copyright[] =
"@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)mt.c 8.2 (Berkeley) 6/6/93";
#else
static char rcsid[] = "$OpenBSD: mt.c,v 1.29 2006/06/14 02:14:25 krw Exp $";
#endif
#endif /* not lint */
/*
* mt --
* magnetic tape manipulation program
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/mtio.h>
#include <sys/stat.h>
#include <sys/disklabel.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include "mt.h"
struct commands {
char *c_name;
int c_code;
int c_ronly;
int c_mincount;
} com[] = {
{ "blocksize", MTSETBSIZ, 1, 0 },
{ "bsf", MTBSF, 1, 1 },
{ "bsr", MTBSR, 1, 1 },
{ "density", MTSETDNSTY, 1, 1 },
{ "eof", MTWEOF, 0, 1 },
{ "eom", MTEOM, 1, 1 },
{ "erase", MTERASE, 0, 1 },
{ "fsf", MTFSF, 1, 1 },
{ "fsr", MTFSR, 1, 1 },
{ "offline", MTOFFL, 1, 1 },
#define COM_EJECT 9 /* element in the above array */
{ "rewind", MTREW, 1, 1 },
{ "rewoffl", MTOFFL, 1, 1 },
{ "status", MTNOP, 1, 1 },
{ "retension", MTRETEN, 1, 1 },
#define COM_RETEN 13 /* element in the above array */
{ "weof", MTWEOF, 0, 1 },
{ NULL }
};
void printreg(char *, u_int, char *);
void status(struct mtget *);
void usage(void);
char *host = NULL; /* remote host (if any) */
char *progname;
int eject = 0;
int
main(int argc, char *argv[])
{
struct commands *comp;
struct mtget mt_status;
struct mtop mt_com;
int ch, len, mtfd, flags, insert = 0;
char *p, *tape, *realtape, *opts;
if ((progname = strrchr(argv[0], '/')))
progname++;
else
progname = argv[0];
if (strcmp(progname, "eject") == 0) {
opts = "t";
eject = 1;
tape = NULL;
} else {
opts = "f:";
if ((tape = getenv("TAPE")) == NULL)
tape = _PATH_DEFTAPE;
}
while ((ch = getopt(argc, argv, opts)) != -1) {
switch (ch) {
case 't':
insert = 1;
break;
case 'f':
tape = optarg;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (eject) {
if (argc == 1) {
tape = *argv++;
argc--;
}
if (argc != 0)
usage();
} else if (argc < 1 || argc > 2)
usage();
if (tape == NULL)
usage();
if (strchr(tape, ':')) {
host = tape;
tape = strchr(host, ':');
*tape++ = '\0';
if (rmthost(host) == 0)
exit(X_ABORT);
}
if (eject) {
if (insert)
comp = &com[COM_RETEN];
else
comp = &com[COM_EJECT];
} else {
len = strlen(p = *argv++);
for (comp = com;; comp++) {
if (comp->c_name == NULL)
errx(1, "%s: unknown command", p);
if (strncmp(p, comp->c_name, len) == 0)
break;
}
}
flags = comp->c_ronly ? O_RDONLY : O_WRONLY | O_CREAT;
if ((mtfd = host ? rmtopen(tape, flags) : opendev(tape, flags,
OPENDEV_PART, &realtape)) < 0) {
if (errno != 0)
warn("%s", host ? tape : realtape);
exit(2);
}
if (comp->c_code != MTNOP) {
mt_com.mt_op = comp->c_code;
if (*argv) {
mt_com.mt_count = strtol(*argv, &p, 10);
if (mt_com.mt_count < comp->c_mincount || *p)
errx(2, "%s: illegal count", *argv);
}
else
mt_com.mt_count = 1;
if ((host ? rmtioctl(mt_com.mt_op, mt_com.mt_count) :
ioctl(mtfd, MTIOCTOP, &mt_com)) < 0) {
if (eject)
err(2, "%s", tape);
else
err(2, "%s: %s", tape, comp->c_name);
}
} else {
if (host)
status(rmtstatus());
else {
if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
err(2, "ioctl MTIOCGET");
status(&mt_status);
}
}
if (host)
rmtclose();
exit(X_FINOK);
/* NOTREACHED */
}
struct tape_desc {
short t_type; /* type of magtape device */
char *t_name; /* printing name */
char *t_dsbits; /* "drive status" register */
char *t_erbits; /* "error" register */
} tapes[] = {
#define SCSI_DS_BITS "\20\5WriteProtect\2Mounted"
{ 0x7, "SCSI", SCSI_DS_BITS, "76543210" },
{ 0 }
};
/*
* Interpret the status buffer returned
*/
void
status(struct mtget *bp)
{
struct tape_desc *mt;
for (mt = tapes;; mt++) {
if (mt->t_type == 0) {
(void)printf("%d: unknown tape drive type\n",
bp->mt_type);
return;
}
if (mt->t_type == bp->mt_type)
break;
}
(void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid);
printreg("ds", bp->mt_dsreg, mt->t_dsbits);
printreg("\ner", bp->mt_erreg, mt->t_erbits);
(void)putchar('\n');
(void)printf("blocksize: %d (%d)\n", bp->mt_blksiz, bp->mt_mblksiz);
(void)printf("density: %d (%d)\n", bp->mt_density, bp->mt_mdensity);
}
/*
* Print a register a la the %b format of the kernel's printf.
*/
void
printreg(char *s, u_int v, char *bits)
{
int i, any = 0;
char c;
if (bits && *bits == 8)
printf("%s=%o", s, v);
else
printf("%s=%x", s, v);
if (!bits)
return;
bits++;
if (v && *bits) {
putchar('<');
while ((i = *bits++)) {
if (v & (1 << (i-1))) {
if (any)
putchar(',');
any = 1;
for (; (c = *bits) > 32; bits++)
putchar(c);
} else
for (; *bits > 32; bits++)
;
}
putchar('>');
}
}
void
usage(void)
{
if (eject)
(void)fprintf(stderr, "usage: %s [-t] device\n", progname);
else
(void)fprintf(stderr,
"usage: %s [-f device] command [count]\n", progname);
exit(X_USAGE);
}