NetBSD/bin/mt/mt.c

327 lines
8.7 KiB
C

/* $NetBSD: mt.c,v 1.48 2018/09/01 06:56:23 mlelstv 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)mt.c 8.2 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: mt.c,v 1.48 2018/09/01 06:56:23 mlelstv Exp $");
#endif
#endif /* not lint */
/*
* mt --
* magnetic tape manipulation program
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/mtio.h>
#include <sys/stat.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <paths.h>
#include <rmt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/* pseudo ioctl constants */
#define MTASF 100
struct commands {
const char *c_name; /* command */
size_t c_namelen; /* command len */
u_long c_spcl; /* ioctl request */
int c_code; /* ioctl code for MTIOCTOP command */
int c_ronly; /* open tape read-only */
int c_mincount; /* min allowed count value */
};
#define CMD(a) a, sizeof(a) - 1
static const struct commands com[] = {
{ CMD("asf"), MTIOCTOP, MTASF, 1, 0 },
{ CMD("blocksize"), MTIOCTOP, MTSETBSIZ, 1, 0 },
{ CMD("bsf"), MTIOCTOP, MTBSF, 1, 1 },
{ CMD("bsr"), MTIOCTOP, MTBSR, 1, 1 },
{ CMD("compress"), MTIOCTOP, MTCMPRESS, 1, 0 },
{ CMD("density"), MTIOCTOP, MTSETDNSTY, 1, 0 },
{ CMD("eof"), MTIOCTOP, MTWEOF, 0, 1 },
{ CMD("eom"), MTIOCTOP, MTEOM, 1, 0 },
{ CMD("erase"), MTIOCTOP, MTERASE, 0, 0 },
{ CMD("fsf"), MTIOCTOP, MTFSF, 1, 1 },
{ CMD("fsr"), MTIOCTOP, MTFSR, 1, 1 },
{ CMD("offline"), MTIOCTOP, MTOFFL, 1, 0 },
{ CMD("rdhpos"), MTIOCRDHPOS, 0, 1, 0 },
{ CMD("rdspos"), MTIOCRDSPOS, 0, 1, 0 },
{ CMD("retension"), MTIOCTOP, MTRETEN, 1, 0 },
{ CMD("rewind"), MTIOCTOP, MTREW, 1, 0 },
{ CMD("rewoffl"), MTIOCTOP, MTOFFL, 1, 0 },
{ CMD("setblk"), MTIOCTOP, MTSETBSIZ, 1, 0 },
{ CMD("setdensity"), MTIOCTOP, MTSETDNSTY, 1, 0 },
{ CMD("sethpos"), MTIOCHLOCATE, 0, 1, 0 },
{ CMD("setspos"), MTIOCSLOCATE, 0, 1, 0 },
{ CMD("status"), MTIOCGET, MTNOP, 1, 0 },
{ CMD("weof"), MTIOCTOP, MTWEOF, 0, 1 },
{ CMD("eew"), MTIOCTOP, MTEWARN, 1, 0 },
{ CMD("cache"), MTIOCTOP, MTCACHE, 1, 0 },
{ CMD("nocache"), MTIOCTOP, MTNOCACHE, 1, 0 },
{ .c_name = NULL }
};
static void printreg(const char *, u_int, const char *);
static void status(struct mtget *);
__dead static void usage(void);
int
main(int argc, char *argv[])
{
const struct commands *cp, *comp;
struct mtget mt_status;
struct mtop mt_com;
int ch, mtfd, flags;
char *p;
const char *tape;
int count;
size_t len;
setprogname(argv[0]);
if ((tape = getenv("TAPE")) == NULL)
tape = _PATH_DEFTAPE;
while ((ch = getopt(argc, argv, "f:t:")) != -1)
switch (ch) {
case 'f':
case 't':
tape = optarg;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc < 1 || argc > 2)
usage();
len = strlen(p = *argv++);
for (comp = NULL, cp = com; cp->c_name != NULL; cp++) {
size_t clen = MIN(len, cp->c_namelen);
if (strncmp(p, cp->c_name, clen) == 0) {
if (comp != NULL)
errx(1, "%s: Ambiguous command `%s' or `%s'?",
p, cp->c_name, comp->c_name);
else
comp = cp;
}
}
if (comp == NULL)
errx(1, "%s: unknown command", p);
if (*argv) {
count = strtol(*argv, &p, 10);
if (count < comp->c_mincount || *p)
errx(2, "%s: illegal count", *argv);
} else
count = 1;
flags = comp->c_ronly ? O_RDONLY : O_WRONLY;
if ((mtfd = open(tape, flags)) < 0)
err(2, "%s", tape);
switch (comp->c_spcl) {
case MTIOCTOP:
if (comp->c_code == MTASF) {
/* If mtget.mt_fileno was implemented, We could
compute the minimal seek needed to position
the tape. Until then, rewind and seek from
begining-of-tape */
mt_com.mt_op = MTREW;
mt_com.mt_count = 1;
if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
err(2, "%s", tape);
if (count > 0) {
mt_com.mt_op = MTFSF;
mt_com.mt_count = count;
if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
err(2, "%s", tape);
}
} else {
mt_com.mt_op = comp->c_code;
mt_com.mt_count = count;
if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
err(2, "%s: %s", tape, comp->c_name);
}
break;
case MTIOCGET:
if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
err(2, "%s: %s", tape, comp->c_name);
status(&mt_status);
break;
case MTIOCRDSPOS:
case MTIOCRDHPOS:
if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0)
err(2, "%s", tape);
printf("%s: block location %u\n", tape, (unsigned int) count);
break;
case MTIOCSLOCATE:
case MTIOCHLOCATE:
if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0)
err(2, "%s", tape);
break;
default:
errx(1, "internal error: unknown request %ld", comp->c_spcl);
}
exit(0);
/* NOTREACHED */
}
#if defined(sun) && !defined(__SVR4)
#include <sundev/tmreg.h>
#include <sundev/arreg.h>
#endif
#ifdef tahoe
#include <tahoe/vba/cyreg.h>
#endif
static const struct tape_desc {
short t_type; /* type of magtape device */
const char *t_name; /* printing name */
const char *t_dsbits; /* "drive status" register */
const char *t_erbits; /* "error" register */
} tapes[] = {
#if defined(sun) && !defined(__SVR4)
{ MT_ISCPC, "TapeMaster", TMS_BITS, 0 },
{ MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS },
#endif
#ifdef tahoe
{ MT_ISCY, "cipher", CYS_BITS, CYCW_BITS },
#endif
#define SCSI_DS_BITS "\20\5WriteProtect\2Mounted"
{ 0x7, "SCSI", SCSI_DS_BITS, "76543210" },
{ .t_type = 0 }
};
/*
* Interpret the status buffer returned
*/
static void
status(struct mtget *bp)
{
const 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, %d, %d, %d)\n",
bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1],
bp->mt_mblksiz[2], bp->mt_mblksiz[3]);
(void)printf("density: %d (%d, %d, %d, %d)\n",
bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1],
bp->mt_mdensity[2], bp->mt_mdensity[3]);
(void)printf("current file number: %d\n", bp->mt_fileno);
(void)printf("current block number: %d\n", bp->mt_blkno);
}
/*
* Print a register a la the %b format of the kernel's printf.
*/
static void
printreg(const char *s, u_int v, const char *bits)
{
int any, i;
char c;
any = 0;
if (bits && *bits == 8)
printf("%s=%o", s, v);
else
printf("%s=%x", s, v);
if (v && bits && *++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('>');
}
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: %s [-f device] command [count]\n",
getprogname());
exit(1);
/* NOTREACHED */
}