mt.c revision 9541 
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 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
41static char sccsid[] = "@(#)mt.c	8.1 (Berkeley) 6/6/93";
42#endif /* not lint */
43
44/*
45 * mt --
46 *   magnetic tape manipulation program
47 */
48#include <sys/types.h>
49#include <sys/ioctl.h>
50#include <sys/mtio.h>
51#include <fcntl.h>
52#include <errno.h>
53#include <stdlib.h>
54#include <stdio.h>
55#include <ctype.h>
56#include <string.h>
57
58/* the appropriate sections of <sys/mtio.h> are also #ifdef'd for FreeBSD */
59#if defined(__FreeBSD__)
60/* c_flags */
61#define NEED_2ARGS	0x01
62#define ZERO_ALLOWED	0x02
63#define IS_DENSITY	0x04
64#define DISABLE_THIS	0x08
65#endif /* defined(__FreeBSD__) */
66
67struct commands {
68	char *c_name;
69	int c_code;
70	int c_ronly;
71#if defined(__FreeBSD__)
72	int c_flags;
73#endif /* defined(__FreeBSD__) */
74} com[] = {
75	{ "bsf",	MTBSF,	1 },
76	{ "bsr",	MTBSR,	1 },
77#if defined(__FreeBSD__)
78	/* XXX FreeBSD considered "eof" dangerous, since it's being
79	   confused with "eom" (and is an alias for "weof" anyway) */
80	{ "eof",	MTWEOF, 0, DISABLE_THIS },
81#else
82	{ "eof",	MTWEOF, 0 },
83#endif
84	{ "fsf",	MTFSF,	1 },
85	{ "fsr",	MTFSR,	1 },
86	{ "offline",	MTOFFL,	1 },
87	{ "rewind",	MTREW,	1 },
88	{ "rewoffl",	MTOFFL,	1 },
89	{ "status",	MTNOP,	1 },
90	{ "weof",	MTWEOF,	0 },
91#if defined(__FreeBSD__)
92	{ "erase",	MTERASE, 0 },
93	{ "blocksize",	MTSETBSIZ, 0, NEED_2ARGS|ZERO_ALLOWED },
94	{ "density",	MTSETDNSTY, 0, NEED_2ARGS|ZERO_ALLOWED|IS_DENSITY },
95	{ "eom",	MTEOD, 1 },
96	{ "comp",	MTCOMP, 0, NEED_2ARGS|ZERO_ALLOWED },
97#endif /* defined(__FreeBSD__) */
98	{ NULL }
99};
100
101void err __P((const char *, ...));
102void printreg __P((char *, u_int, char *));
103void status __P((struct mtget *));
104void usage __P((void));
105#if defined (__FreeBSD__)
106void st_status (struct mtget *);
107int stringtodens (const char *s);
108const char *denstostring (int d);
109void warn_eof __P((void));
110#endif /* defined (__FreeBSD__) */
111
112int
113main(argc, argv)
114	int argc;
115	char *argv[];
116{
117	register struct commands *comp;
118	struct mtget mt_status;
119	struct mtop mt_com;
120	int ch, len, mtfd;
121	char *p, *tape;
122
123	if ((tape = getenv("TAPE")) == NULL)
124		tape = DEFTAPE;
125
126	while ((ch = getopt(argc, argv, "f:t:")) != EOF)
127		switch(ch) {
128		case 'f':
129		case 't':
130			tape = optarg;
131			break;
132		case '?':
133		default:
134			usage();
135		}
136	argc -= optind;
137	argv += optind;
138
139	if (argc < 1 || argc > 2)
140		usage();
141
142	len = strlen(p = *argv++);
143	for (comp = com;; comp++) {
144		if (comp->c_name == NULL)
145			err("%s: unknown command", p);
146		if (strncmp(p, comp->c_name, len) == 0)
147			break;
148	}
149#if defined(__FreeBSD__)
150	if((comp->c_flags & NEED_2ARGS) && argc != 2)
151		usage();
152	if(comp->c_flags & DISABLE_THIS) {
153		warn_eof();
154	}
155#endif /* defined(__FreeBSD__) */
156	if ((mtfd = open(tape, comp->c_ronly ? O_RDONLY : O_RDWR)) < 0)
157		err("%s: %s", tape, strerror(errno));
158	if (comp->c_code != MTNOP) {
159		mt_com.mt_op = comp->c_code;
160		if (*argv) {
161#if defined (__FreeBSD__)
162			if (!isdigit(**argv) &&
163			    comp->c_flags & IS_DENSITY) {
164				const char *dcanon;
165				mt_com.mt_count = stringtodens(*argv);
166				if (mt_com.mt_count == 0)
167					err("%s: unknown density", *argv);
168				dcanon = denstostring(mt_com.mt_count);
169				if (strcmp(dcanon, *argv) != 0)
170					printf(
171					"Using \"%s\" as an alias for %s\n",
172					       *argv, dcanon);
173				p = "";
174			} else
175				/* allow for hex numbers; useful for density */
176				mt_com.mt_count = strtol(*argv, &p, 0);
177#else
178			mt_com.mt_count = strtol(*argv, &p, 10);
179#endif /* defined(__FreeBSD__) */
180			if (mt_com.mt_count <=
181#if defined (__FreeBSD__)
182			    ((comp->c_flags & ZERO_ALLOWED)? -1: 0)
183#else
184			    0
185#endif /* defined (__FreeBSD__) */
186			    || *p)
187				err("%s: illegal count", *argv);
188		}
189		else
190			mt_com.mt_count = 1;
191		if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
192			err("%s: %s: %s", tape, comp->c_name, strerror(errno));
193	} else {
194		if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
195			err("%s", strerror(errno));
196		status(&mt_status);
197	}
198	exit (0);
199	/* NOTREACHED */
200}
201
202#ifdef vax
203#include <vax/mba/mtreg.h>
204#include <vax/mba/htreg.h>
205
206#include <vax/uba/utreg.h>
207#include <vax/uba/tmreg.h>
208#undef b_repcnt		/* argh */
209#include <vax/uba/tsreg.h>
210#endif
211
212#ifdef sun
213#include <sundev/tmreg.h>
214#include <sundev/arreg.h>
215#endif
216
217#ifdef tahoe
218#include <tahoe/vba/cyreg.h>
219#endif
220
221struct tape_desc {
222	short	t_type;		/* type of magtape device */
223	char	*t_name;	/* printing name */
224	char	*t_dsbits;	/* "drive status" register */
225	char	*t_erbits;	/* "error" register */
226} tapes[] = {
227#ifdef vax
228	{ MT_ISTS,	"ts11",		0,		TSXS0_BITS },
229	{ MT_ISHT,	"tm03",		HTDS_BITS,	HTER_BITS },
230	{ MT_ISTM,	"tm11",		0,		TMER_BITS },
231	{ MT_ISMT,	"tu78",		MTDS_BITS,	0 },
232	{ MT_ISUT,	"tu45",		UTDS_BITS,	UTER_BITS },
233#endif
234#ifdef sun
235	{ MT_ISCPC,	"TapeMaster",	TMS_BITS,	0 },
236	{ MT_ISAR,	"Archive",	ARCH_CTRL_BITS,	ARCH_BITS },
237#endif
238#ifdef tahoe
239	{ MT_ISCY,	"cipher",	CYS_BITS,	CYCW_BITS },
240#endif
241#if defined (__FreeBSD__)
242	/*
243	 * XXX This is terrific.  The st driver reports the tape drive
244	 * as 0x7 (MT_ISAR - Sun/Archive compatible); the wt driver
245	 * either reports MT_ISVIPER1 for an Archive tape, or 0x11
246	 * (MT_ISMFOUR) for other tapes.
247	 * XXX for the wt driver, rely on it behaving like a "standard"
248	 * magtape driver.
249	 */
250	{ MT_ISAR,	"SCSI tape drive", 0,		0 },
251	{ MT_ISVIPER1,	"Archive Viper", 0,		0 },
252	{ MT_ISMFOUR,	"Wangtek",	0,		0 },
253#endif /* defined (__FreeBSD__) */
254	{ 0 }
255};
256
257/*
258 * Interpret the status buffer returned
259 */
260void
261status(bp)
262	register struct mtget *bp;
263{
264	register struct tape_desc *mt;
265
266	for (mt = tapes;; mt++) {
267		if (mt->t_type == 0) {
268			(void)printf("%d: unknown tape drive type\n",
269			    bp->mt_type);
270			return;
271		}
272		if (mt->t_type == bp->mt_type)
273			break;
274	}
275#if defined (__FreeBSD__)
276	if(mt->t_type == MT_ISAR)
277		st_status(bp);
278	else {
279#endif /* defined (__FreeBSD__) */
280	(void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid);
281	printreg("ds", bp->mt_dsreg, mt->t_dsbits);
282	printreg("\ner", bp->mt_erreg, mt->t_erbits);
283	(void)putchar('\n');
284#if defined (__FreeBSD__)
285	}
286#endif /* defined (__FreeBSD__) */
287}
288
289/*
290 * Print a register a la the %b format of the kernel's printf.
291 */
292void
293printreg(s, v, bits)
294	char *s;
295	register u_int v;
296	register char *bits;
297{
298	register int i, any = 0;
299	register char c;
300
301	if (bits && *bits == 8)
302		printf("%s=%o", s, v);
303	else
304		printf("%s=%x", s, v);
305	bits++;
306	if (v && bits) {
307		putchar('<');
308		while (i = *bits++) {
309			if (v & (1 << (i-1))) {
310				if (any)
311					putchar(',');
312				any = 1;
313				for (; (c = *bits) > 32; bits++)
314					putchar(c);
315			} else
316				for (; *bits > 32; bits++)
317					;
318		}
319		putchar('>');
320	}
321}
322
323void
324usage()
325{
326	(void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n");
327	exit(1);
328}
329
330#if __STDC__
331#include <stdarg.h>
332#else
333#include <varargs.h>
334#endif
335
336void
337#if __STDC__
338err(const char *fmt, ...)
339#else
340err(fmt, va_alist)
341	char *fmt;
342        va_dcl
343#endif
344{
345	va_list ap;
346#if __STDC__
347	va_start(ap, fmt);
348#else
349	va_start(ap);
350#endif
351	(void)fprintf(stderr, "mt: ");
352	(void)vfprintf(stderr, fmt, ap);
353	va_end(ap);
354	(void)fprintf(stderr, "\n");
355	exit(1);
356	/* NOTREACHED */
357}
358
359#if defined (__FreeBSD__)
360
361struct densities {
362	int dens;
363	const char *name;
364} dens [] = {
365	{ 0x1,  "X3.22-1983" },
366	{ 0x2,  "X3.39-1986" },
367	{ 0x3,  "X3.54-1986" },
368	{ 0x5,  "X3.136-1986" },
369	{ 0x6,  "X3.157-1987" },
370	{ 0x7,  "X3.116-1986" },
371	{ 0x8,  "X3.158-1986" },
372	{ 0x9,  "X3B5/87-099" },
373	{ 0xA,  "X3B5/86-199" },
374	{ 0xB,  "X3.56-1986" },
375	{ 0xC,  "HI-TC1" },
376	{ 0xD,  "HI-TC2" },
377	{ 0xF,  "QIC-120" },
378	{ 0x10, "QIC-150" },
379	{ 0x11, "QIC-320" },
380	{ 0x12, "QIC-1350" },
381	{ 0x13, "X3B5/88-185A" },
382	{ 0x14, "X3.202-1991" },
383	{ 0x15, "ECMA TC17" },
384	{ 0x16, "X3.193-1990" },
385	{ 0x17, "X3B5/91-174" },
386	{ 0, 0 }
387};
388
389const char *
390denstostring(int d)
391{
392	static char buf[20];
393	struct densities *sd;
394
395	for (sd = dens; sd->dens; sd++)
396		if (sd->dens == d)
397			break;
398	if (sd->dens == 0) {
399		sprintf(buf, "0x%02x", d);
400		return buf;
401	} else
402		return sd->name;
403}
404
405int
406stringtodens(const char *s)
407{
408	struct densities *sd;
409	size_t l = strlen(s);
410
411	for (sd = dens; sd->dens; sd++)
412		if (strncasecmp(sd->name, s, l) == 0)
413			break;
414	return sd->dens;
415}
416
417
418const char *
419getblksiz(int bs)
420{
421	static char buf[25];
422	if (bs == 0)
423		return "variable";
424	else {
425		sprintf(buf, "= %d bytes", bs);
426		return buf;
427	}
428}
429
430
431void
432st_status(struct mtget *bp)
433{
434	printf("Present Mode:   Density = %-12s Blocksize %s\n",
435	       denstostring(bp->mt_density), getblksiz(bp->mt_blksiz));
436	printf("---------available modes---------\n");
437	printf("Mode 0:         Density = %-12s Blocksize %s\n",
438	       denstostring(bp->mt_density0), getblksiz(bp->mt_blksiz0));
439	printf("Mode 1:         Density = %-12s Blocksize %s\n",
440	       denstostring(bp->mt_density1), getblksiz(bp->mt_blksiz1));
441	printf("Mode 2:         Density = %-12s Blocksize %s\n",
442	       denstostring(bp->mt_density2), getblksiz(bp->mt_blksiz2));
443	printf("Mode 3:         Density = %-12s Blocksize %s\n",
444	       denstostring(bp->mt_density3), getblksiz(bp->mt_blksiz3));
445}
446
447void
448warn_eof(void)
449{
450	fprintf(stderr,
451		"The \"eof\" command has been disabled.\n"
452		"Use \"weof\" if you really want to write end-of-file marks,\n"
453		"or \"eom\" if you rather want to skip to the end of "
454		"recorded medium.\n");
455	exit(1);
456}
457
458#endif /* defined (__FreeBSD__) */
459