mt.c revision 35305 
1/*
2 * Copyright (c) 1980, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1980, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)mt.c	8.2 (Berkeley) 5/4/95";
43#endif
44static const char rcsid[] =
45	"$Id: mt.c,v 1.13 1997/08/21 05:49:29 joerg Exp $";
46#endif /* not lint */
47
48/*
49 * mt --
50 *   magnetic tape manipulation program
51 */
52#include <sys/types.h>
53#include <sys/ioctl.h>
54#include <sys/mtio.h>
55
56#include <ctype.h>
57#include <err.h>
58#include <fcntl.h>
59#include <stdio.h>
60#include <stdlib.h>
61#include <string.h>
62#include <unistd.h>
63
64/* the appropriate sections of <sys/mtio.h> are also #ifdef'd for FreeBSD */
65#if defined(__FreeBSD__)
66/* c_flags */
67#define NEED_2ARGS	0x01
68#define ZERO_ALLOWED	0x02
69#define IS_DENSITY	0x04
70#define DISABLE_THIS	0x08
71#endif /* defined(__FreeBSD__) */
72
73struct commands {
74	char *c_name;
75	int c_code;
76	int c_ronly;
77#if defined(__FreeBSD__)
78	int c_flags;
79#endif /* defined(__FreeBSD__) */
80} com[] = {
81	{ "bsf",	MTBSF,	1 },
82	{ "bsr",	MTBSR,	1 },
83#if defined(__FreeBSD__)
84	/* XXX FreeBSD considered "eof" dangerous, since it's being
85	   confused with "eom" (and is an alias for "weof" anyway) */
86	{ "eof",	MTWEOF, 0, DISABLE_THIS },
87#else
88	{ "eof",	MTWEOF, 0 },
89#endif
90	{ "fsf",	MTFSF,	1 },
91	{ "fsr",	MTFSR,	1 },
92	{ "offline",	MTOFFL,	1 },
93	{ "rewind",	MTREW,	1 },
94	{ "rewoffl",	MTOFFL,	1 },
95	{ "status",	MTNOP,	1 },
96	{ "weof",	MTWEOF,	0 },
97#if defined(__FreeBSD__)
98	{ "erase",	MTERASE, 0 },
99	{ "blocksize",	MTSETBSIZ, 0, NEED_2ARGS|ZERO_ALLOWED },
100	{ "density",	MTSETDNSTY, 0, NEED_2ARGS|ZERO_ALLOWED|IS_DENSITY },
101	{ "eom",	MTEOD, 1 },
102	{ "eod",	MTEOD, 1 },
103	{ "comp",	MTCOMP, 0, NEED_2ARGS|ZERO_ALLOWED },
104	{ "retension",	MTRETENS, 1 },
105#endif /* defined(__FreeBSD__) */
106	{ NULL }
107};
108
109void printreg __P((char *, u_int, char *));
110void status __P((struct mtget *));
111void usage __P((void));
112#if defined (__FreeBSD__)
113void st_status (struct mtget *);
114int stringtodens (const char *s);
115const char *denstostring (int d);
116void warn_eof __P((void));
117#endif /* defined (__FreeBSD__) */
118
119int
120main(argc, argv)
121	int argc;
122	char *argv[];
123{
124	register struct commands *comp;
125	struct mtget mt_status;
126	struct mtop mt_com;
127	int ch, len, mtfd;
128	char *p, *tape;
129
130	if ((tape = getenv("TAPE")) == NULL)
131		tape = DEFTAPE;
132
133	while ((ch = getopt(argc, argv, "f:t:")) != -1)
134		switch(ch) {
135		case 'f':
136		case 't':
137			tape = optarg;
138			break;
139		case '?':
140		default:
141			usage();
142		}
143	argc -= optind;
144	argv += optind;
145
146	if (argc < 1 || argc > 2)
147		usage();
148
149	len = strlen(p = *argv++);
150	for (comp = com;; comp++) {
151		if (comp->c_name == NULL)
152			errx(1, "%s: unknown command", p);
153		if (strncmp(p, comp->c_name, len) == 0)
154			break;
155	}
156#if defined(__FreeBSD__)
157	if((comp->c_flags & NEED_2ARGS) && argc != 2)
158		usage();
159	if(comp->c_flags & DISABLE_THIS) {
160		warn_eof();
161	}
162#endif /* defined(__FreeBSD__) */
163	if ((mtfd = open(tape, comp->c_ronly ? O_RDONLY : O_RDWR)) < 0)
164		err(1, "%s", tape);
165	if (comp->c_code != MTNOP) {
166		mt_com.mt_op = comp->c_code;
167		if (*argv) {
168#if defined (__FreeBSD__)
169			if (!isdigit(**argv) &&
170			    comp->c_flags & IS_DENSITY) {
171				const char *dcanon;
172				mt_com.mt_count = stringtodens(*argv);
173				if (mt_com.mt_count == 0)
174					errx(1, "%s: unknown density", *argv);
175				dcanon = denstostring(mt_com.mt_count);
176				if (strcmp(dcanon, *argv) != 0)
177					printf(
178					"Using \"%s\" as an alias for %s\n",
179					       *argv, dcanon);
180				p = "";
181			} else
182				/* allow for hex numbers; useful for density */
183				mt_com.mt_count = strtol(*argv, &p, 0);
184#else
185			mt_com.mt_count = strtol(*argv, &p, 10);
186#endif /* defined(__FreeBSD__) */
187			if (mt_com.mt_count <=
188#if defined (__FreeBSD__)
189			    ((comp->c_flags & ZERO_ALLOWED)? -1: 0)
190#else
191			    0
192#endif /* defined (__FreeBSD__) */
193			    || *p)
194				errx(1, "%s: illegal count", *argv);
195		}
196		else
197			mt_com.mt_count = 1;
198		if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
199			err(1, "%s: %s", tape, comp->c_name);
200	} else {
201		if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
202			err(1, NULL);
203		status(&mt_status);
204	}
205	exit (0);
206	/* NOTREACHED */
207}
208
209#ifdef vax
210#include <vax/mba/mtreg.h>
211#include <vax/mba/htreg.h>
212
213#include <vax/uba/utreg.h>
214#include <vax/uba/tmreg.h>
215#undef b_repcnt		/* argh */
216#include <vax/uba/tsreg.h>
217#endif
218
219#ifdef sun
220#include <sundev/tmreg.h>
221#include <sundev/arreg.h>
222#endif
223
224#ifdef tahoe
225#include <tahoe/vba/cyreg.h>
226#endif
227
228#ifdef __FreeBSD__
229#include <machine/wtio.h>
230#endif
231
232struct tape_desc {
233	short	t_type;		/* type of magtape device */
234	char	*t_name;	/* printing name */
235	char	*t_dsbits;	/* "drive status" register */
236	char	*t_erbits;	/* "error" register */
237} tapes[] = {
238#ifdef vax
239	{ MT_ISTS,	"ts11",		0,		TSXS0_BITS },
240	{ MT_ISHT,	"tm03",		HTDS_BITS,	HTER_BITS },
241	{ MT_ISTM,	"tm11",		0,		TMER_BITS },
242	{ MT_ISMT,	"tu78",		MTDS_BITS,	0 },
243	{ MT_ISUT,	"tu45",		UTDS_BITS,	UTER_BITS },
244#endif
245#ifdef sun
246	{ MT_ISCPC,	"TapeMaster",	TMS_BITS,	0 },
247	{ MT_ISAR,	"Archive",	ARCH_CTRL_BITS,	ARCH_BITS },
248#endif
249#ifdef tahoe
250	{ MT_ISCY,	"cipher",	CYS_BITS,	CYCW_BITS },
251#endif
252#if defined (__FreeBSD__)
253	/*
254	 * XXX This is weird.  The st driver reports the tape drive
255	 * as 0x7 (MT_ISAR - Sun/Archive compatible); the wt driver
256	 * either reports MT_ISVIPER1 for an Archive tape, or 0x11
257	 * (MT_ISMFOUR) for other tapes.
258	 * XXX for the wt driver, rely on it behaving like a "standard"
259	 * magtape driver.
260	 */
261	{ MT_ISAR,	"SCSI tape drive", 0,		0 },
262	{ MT_ISVIPER1,	"Archive Viper", WTDS_BITS, WTER_BITS },
263	{ MT_ISMFOUR,	"Wangtek",	 WTDS_BITS, WTER_BITS },
264#endif /* defined (__FreeBSD__) */
265	{ 0 }
266};
267
268/*
269 * Interpret the status buffer returned
270 */
271void
272status(bp)
273	register struct mtget *bp;
274{
275	register struct tape_desc *mt;
276
277	for (mt = tapes;; mt++) {
278		if (mt->t_type == 0) {
279			(void)printf("%d: unknown tape drive type\n",
280			    bp->mt_type);
281			return;
282		}
283		if (mt->t_type == bp->mt_type)
284			break;
285	}
286#if defined (__FreeBSD__)
287	if(mt->t_type == MT_ISAR)
288		st_status(bp);
289	else {
290#endif /* defined (__FreeBSD__) */
291	(void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid);
292	printreg("ds", (unsigned short)bp->mt_dsreg, mt->t_dsbits);
293	printreg("\ner", (unsigned short)bp->mt_erreg, mt->t_erbits);
294	(void)putchar('\n');
295#if defined (__FreeBSD__)
296	}
297#endif /* defined (__FreeBSD__) */
298}
299
300/*
301 * Print a register a la the %b format of the kernel's printf.
302 */
303void
304printreg(s, v, bits)
305	char *s;
306	register u_int v;
307	register char *bits;
308{
309	register int i, any = 0;
310	register char c;
311
312	if (bits && *bits == 8)
313		printf("%s=%o", s, v);
314	else
315		printf("%s=%x", s, v);
316	if (!bits)
317		return;
318	bits++;
319	if (v && bits) {
320		putchar('<');
321		while ((i = *bits++)) {
322			if (v & (1 << (i-1))) {
323				if (any)
324					putchar(',');
325				any = 1;
326				for (; (c = *bits) > 32; bits++)
327					putchar(c);
328			} else
329				for (; *bits > 32; bits++)
330					;
331		}
332		putchar('>');
333	}
334}
335
336void
337usage()
338{
339	(void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n");
340	exit(1);
341}
342
343#if defined (__FreeBSD__)
344
345struct densities {
346	int dens;
347	const char *name;
348} dens [] = {
349	{ 0x1,  "X3.22-1983" },
350	{ 0x2,  "X3.39-1986" },
351	{ 0x3,  "X3.54-1986" },
352	{ 0x5,  "X3.136-1986" },
353	{ 0x6,  "X3.157-1987" },
354	{ 0x7,  "X3.116-1986" },
355	{ 0x8,  "X3.158-1986" },
356	{ 0x9,  "X3B5/87-099" },
357	{ 0xA,  "X3B5/86-199" },
358	{ 0xB,  "X3.56-1986" },
359	{ 0xC,  "HI-TC1" },
360	{ 0xD,  "HI-TC2" },
361	{ 0xF,  "QIC-120" },
362	{ 0x10, "QIC-150" },
363	{ 0x11, "QIC-320" },
364	{ 0x12, "QIC-1350" },
365	{ 0x13, "X3B5/88-185A" },
366	{ 0x14, "X3.202-1991" },
367	{ 0x15, "ECMA TC17" },
368	{ 0x16, "X3.193-1990" },
369	{ 0x17, "X3B5/91-174" },
370	{ 0, 0 }
371};
372
373const char *
374denstostring(int d)
375{
376	static char buf[20];
377	struct densities *sd;
378
379	for (sd = dens; sd->dens; sd++)
380		if (sd->dens == d)
381			break;
382	if (sd->dens == 0) {
383		sprintf(buf, "0x%02x", d);
384		return buf;
385	} else
386		return sd->name;
387}
388
389int
390stringtodens(const char *s)
391{
392	struct densities *sd;
393	size_t l = strlen(s);
394
395	for (sd = dens; sd->dens; sd++)
396		if (strncasecmp(sd->name, s, l) == 0)
397			break;
398	return sd->dens;
399}
400
401
402const char *
403getblksiz(int bs)
404{
405	static char buf[25];
406	if (bs == 0)
407		return "variable";
408	else {
409		sprintf(buf, "= %d bytes", bs);
410		return buf;
411	}
412}
413
414
415void
416st_status(struct mtget *bp)
417{
418	printf("Present Mode:   Density = %-12s Blocksize %s Comp %d\n",
419	       denstostring(bp->mt_density), getblksiz(bp->mt_blksiz), (int)bp->mt_comp);
420	printf("---------available modes---------\n");
421	printf("Mode 0:         Density = %-12s Blocksize %s\n",
422	       denstostring(bp->mt_density0), getblksiz(bp->mt_blksiz0));
423	printf("Mode 1:         Density = %-12s Blocksize %s\n",
424	       denstostring(bp->mt_density1), getblksiz(bp->mt_blksiz1));
425	printf("Mode 2:         Density = %-12s Blocksize %s\n",
426	       denstostring(bp->mt_density2), getblksiz(bp->mt_blksiz2));
427	printf("Mode 3:         Density = %-12s Blocksize %s\n",
428	       denstostring(bp->mt_density3), getblksiz(bp->mt_blksiz3));
429}
430
431void
432warn_eof(void)
433{
434	fprintf(stderr,
435		"The \"eof\" command has been disabled.\n"
436		"Use \"weof\" if you really want to write end-of-file marks,\n"
437		"or \"eom\" if you rather want to skip to the end of "
438		"recorded medium.\n");
439	exit(1);
440}
441
442#endif /* defined (__FreeBSD__) */
443