mt.c revision 7929 
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#endif /* defined(__FreeBSD__) */
65
66struct commands {
67	char *c_name;
68	int c_code;
69	int c_ronly;
70#if defined(__FreeBSD__)
71	int c_flags;
72#endif /* defined(__FreeBSD__) */
73} com[] = {
74	{ "bsf",	MTBSF,	1 },
75	{ "bsr",	MTBSR,	1 },
76	{ "eof",	MTWEOF,	0 },
77	{ "fsf",	MTFSF,	1 },
78	{ "fsr",	MTFSR,	1 },
79	{ "offline",	MTOFFL,	1 },
80	{ "rewind",	MTREW,	1 },
81	{ "rewoffl",	MTOFFL,	1 },
82	{ "status",	MTNOP,	1 },
83	{ "weof",	MTWEOF,	0 },
84#if defined(__FreeBSD__)
85	{ "erase",	MTERASE, 0 },
86	{ "blocksize",	MTSETBSIZ, 0, NEED_2ARGS|ZERO_ALLOWED },
87	{ "density",	MTSETDNSTY, 0, NEED_2ARGS|ZERO_ALLOWED|IS_DENSITY },
88	{ "eom",	MTEOD, 1 },
89	{ "comp",	MTCOMP, 0, NEED_2ARGS|ZERO_ALLOWED },
90#endif /* defined(__FreeBSD__) */
91	{ NULL }
92};
93
94void err __P((const char *, ...));
95void printreg __P((char *, u_int, char *));
96void status __P((struct mtget *));
97void usage __P((void));
98#if defined (__FreeBSD__)
99void st_status (struct mtget *);
100int stringtodens (const char *s);
101const char *denstostring (int d);
102#endif /* defined (__FreeBSD__) */
103
104int
105main(argc, argv)
106	int argc;
107	char *argv[];
108{
109	register struct commands *comp;
110	struct mtget mt_status;
111	struct mtop mt_com;
112	int ch, len, mtfd;
113	char *p, *tape;
114
115	if ((tape = getenv("TAPE")) == NULL)
116		tape = DEFTAPE;
117
118	while ((ch = getopt(argc, argv, "f:t:")) != EOF)
119		switch(ch) {
120		case 'f':
121		case 't':
122			tape = optarg;
123			break;
124		case '?':
125		default:
126			usage();
127		}
128	argc -= optind;
129	argv += optind;
130
131	if (argc < 1 || argc > 2)
132		usage();
133
134	len = strlen(p = *argv++);
135	for (comp = com;; comp++) {
136		if (comp->c_name == NULL)
137			err("%s: unknown command", p);
138		if (strncmp(p, comp->c_name, len) == 0)
139			break;
140	}
141#if defined(__FreeBSD__)
142	if((comp->c_flags & NEED_2ARGS) && argc != 2)
143		usage();
144#endif /* defined(__FreeBSD__) */
145	if ((mtfd = open(tape, comp->c_ronly ? O_RDONLY : O_RDWR)) < 0)
146		err("%s: %s", tape, strerror(errno));
147	if (comp->c_code != MTNOP) {
148		mt_com.mt_op = comp->c_code;
149		if (*argv) {
150#if defined (__FreeBSD__)
151			if (!isdigit(**argv) &&
152			    comp->c_flags & IS_DENSITY) {
153				const char *dcanon;
154				mt_com.mt_count = stringtodens(*argv);
155				if (mt_com.mt_count == 0)
156					err("%s: unknown density", *argv);
157				dcanon = denstostring(mt_com.mt_count);
158				if (strcmp(dcanon, *argv) != 0)
159					printf(
160					"Using \"%s\" as an alias for %s\n",
161					       *argv, dcanon);
162				p = "";
163			} else
164				/* allow for hex numbers; useful for density */
165				mt_com.mt_count = strtol(*argv, &p, 0);
166#else
167			mt_com.mt_count = strtol(*argv, &p, 10);
168#endif /* defined(__FreeBSD__) */
169			if (mt_com.mt_count <=
170#if defined (__FreeBSD__)
171			    ((comp->c_flags & ZERO_ALLOWED)? -1: 0)
172#else
173			    0
174#endif /* defined (__FreeBSD__) */
175			    || *p)
176				err("%s: illegal count", *argv);
177		}
178		else
179			mt_com.mt_count = 1;
180		if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
181			err("%s: %s: %s", tape, comp->c_name, strerror(errno));
182	} else {
183		if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
184			err("%s", strerror(errno));
185		status(&mt_status);
186	}
187	exit (0);
188	/* NOTREACHED */
189}
190
191#ifdef vax
192#include <vax/mba/mtreg.h>
193#include <vax/mba/htreg.h>
194
195#include <vax/uba/utreg.h>
196#include <vax/uba/tmreg.h>
197#undef b_repcnt		/* argh */
198#include <vax/uba/tsreg.h>
199#endif
200
201#ifdef sun
202#include <sundev/tmreg.h>
203#include <sundev/arreg.h>
204#endif
205
206#ifdef tahoe
207#include <tahoe/vba/cyreg.h>
208#endif
209
210struct tape_desc {
211	short	t_type;		/* type of magtape device */
212	char	*t_name;	/* printing name */
213	char	*t_dsbits;	/* "drive status" register */
214	char	*t_erbits;	/* "error" register */
215} tapes[] = {
216#ifdef vax
217	{ MT_ISTS,	"ts11",		0,		TSXS0_BITS },
218	{ MT_ISHT,	"tm03",		HTDS_BITS,	HTER_BITS },
219	{ MT_ISTM,	"tm11",		0,		TMER_BITS },
220	{ MT_ISMT,	"tu78",		MTDS_BITS,	0 },
221	{ MT_ISUT,	"tu45",		UTDS_BITS,	UTER_BITS },
222#endif
223#ifdef sun
224	{ MT_ISCPC,	"TapeMaster",	TMS_BITS,	0 },
225	{ MT_ISAR,	"Archive",	ARCH_CTRL_BITS,	ARCH_BITS },
226#endif
227#ifdef tahoe
228	{ MT_ISCY,	"cipher",	CYS_BITS,	CYCW_BITS },
229#endif
230#if defined (__FreeBSD__)
231	/*
232	 * XXX This is terrific.  The st driver reports the tape drive
233	 * as 0x7 (MT_ISAR - Sun/Archive compatible); the wt driver
234	 * either reports MT_ISVIPER1 for an Archive tape, or 0x11
235	 * (MT_ISMFOUR) for other tapes.
236	 * XXX for the wt driver, rely on it behaving like a "standard"
237	 * magtape driver.
238	 */
239	{ MT_ISAR,	"SCSI tape drive", 0,		0 },
240	{ MT_ISVIPER1,	"Archive Viper", 0,		0 },
241	{ MT_ISMFOUR,	"Wangtek",	0,		0 },
242#endif /* defined (__FreeBSD__) */
243	{ 0 }
244};
245
246/*
247 * Interpret the status buffer returned
248 */
249void
250status(bp)
251	register struct mtget *bp;
252{
253	register struct tape_desc *mt;
254
255	for (mt = tapes;; mt++) {
256		if (mt->t_type == 0) {
257			(void)printf("%d: unknown tape drive type\n",
258			    bp->mt_type);
259			return;
260		}
261		if (mt->t_type == bp->mt_type)
262			break;
263	}
264#if defined (__FreeBSD__)
265	if(mt->t_type == MT_ISAR)
266		st_status(bp);
267	else {
268#endif /* defined (__FreeBSD__) */
269	(void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid);
270	printreg("ds", bp->mt_dsreg, mt->t_dsbits);
271	printreg("\ner", bp->mt_erreg, mt->t_erbits);
272	(void)putchar('\n');
273#if defined (__FreeBSD__)
274	}
275#endif /* defined (__FreeBSD__) */
276}
277
278/*
279 * Print a register a la the %b format of the kernel's printf.
280 */
281void
282printreg(s, v, bits)
283	char *s;
284	register u_int v;
285	register char *bits;
286{
287	register int i, any = 0;
288	register char c;
289
290	if (bits && *bits == 8)
291		printf("%s=%o", s, v);
292	else
293		printf("%s=%x", s, v);
294	bits++;
295	if (v && bits) {
296		putchar('<');
297		while (i = *bits++) {
298			if (v & (1 << (i-1))) {
299				if (any)
300					putchar(',');
301				any = 1;
302				for (; (c = *bits) > 32; bits++)
303					putchar(c);
304			} else
305				for (; *bits > 32; bits++)
306					;
307		}
308		putchar('>');
309	}
310}
311
312void
313usage()
314{
315	(void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n");
316	exit(1);
317}
318
319#if __STDC__
320#include <stdarg.h>
321#else
322#include <varargs.h>
323#endif
324
325void
326#if __STDC__
327err(const char *fmt, ...)
328#else
329err(fmt, va_alist)
330	char *fmt;
331        va_dcl
332#endif
333{
334	va_list ap;
335#if __STDC__
336	va_start(ap, fmt);
337#else
338	va_start(ap);
339#endif
340	(void)fprintf(stderr, "mt: ");
341	(void)vfprintf(stderr, fmt, ap);
342	va_end(ap);
343	(void)fprintf(stderr, "\n");
344	exit(1);
345	/* NOTREACHED */
346}
347
348#if defined (__FreeBSD__)
349
350struct densities {
351	int dens;
352	const char *name;
353} dens [] = {
354	{ 0x1,  "X3.22-1983" },
355	{ 0x2,  "X3.39-1986" },
356	{ 0x3,  "X3.54-1986" },
357	{ 0x5,  "X3.136-1986" },
358	{ 0x6,  "X3.157-1987" },
359	{ 0x7,  "X3.116-1986" },
360	{ 0x8,  "X3.158-1986" },
361	{ 0x9,  "X3B5/87-099" },
362	{ 0xA,  "X3B5/86-199" },
363	{ 0xB,  "X3.56-1986" },
364	{ 0xC,  "HI-TC1" },
365	{ 0xD,  "HI-TC2" },
366	{ 0xF,  "QIC-120" },
367	{ 0x10, "QIC-150" },
368	{ 0x11, "QIC-320" },
369	{ 0x12, "QIC-1350" },
370	{ 0x13, "X3B5/88-185A" },
371	{ 0x14, "X3.202-1991" },
372	{ 0x15, "ECMA TC17" },
373	{ 0x16, "X3.193-1990" },
374	{ 0x17, "X3B5/91-174" },
375	{ 0, 0 }
376};
377
378const char *
379denstostring(int d)
380{
381	static char buf[20];
382	struct densities *sd;
383
384	for (sd = dens; sd->dens; sd++)
385		if (sd->dens == d)
386			break;
387	if (sd->dens == 0) {
388		sprintf(buf, "0x%02x", d);
389		return buf;
390	} else
391		return sd->name;
392}
393
394int
395stringtodens(const char *s)
396{
397	struct densities *sd;
398	size_t l = strlen(s);
399
400	for (sd = dens; sd->dens; sd++)
401		if (strncasecmp(sd->name, s, l) == 0)
402			break;
403	return sd->dens;
404}
405
406
407const char *
408getblksiz(int bs)
409{
410	static char buf[25];
411	if (bs == 0)
412		return "variable";
413	else {
414		sprintf(buf, "= %d bytes", bs);
415		return buf;
416	}
417}
418
419
420void
421st_status(struct mtget *bp)
422{
423	printf("Present Mode:   Density = %-12s Blocksize %s\n",
424	       denstostring(bp->mt_density), getblksiz(bp->mt_blksiz));
425	printf("---------available modes---------\n");
426	printf("Mode 0:         Density = %-12s Blocksize %s\n",
427	       denstostring(bp->mt_density0), getblksiz(bp->mt_blksiz0));
428	printf("Mode 1:         Density = %-12s Blocksize %s\n",
429	       denstostring(bp->mt_density1), getblksiz(bp->mt_blksiz1));
430	printf("Mode 2:         Density = %-12s Blocksize %s\n",
431	       denstostring(bp->mt_density2), getblksiz(bp->mt_blksiz2));
432	printf("Mode 3:         Density = %-12s Blocksize %s\n",
433	       denstostring(bp->mt_density3), getblksiz(bp->mt_blksiz3));
434}
435
436#endif /* defined (__FreeBSD__) */
437