mt.c revision 3964 
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
58struct commands {
59	char *c_name;
60	int c_code;
61	int c_ronly;
62} com[] = {
63	{ "bsf",	MTBSF,	1 },
64	{ "bsr",	MTBSR,	1 },
65	{ "eof",	MTWEOF,	0 },
66	{ "fsf",	MTFSF,	1 },
67	{ "fsr",	MTFSR,	1 },
68	{ "offline",	MTOFFL,	1 },
69	{ "rewind",	MTREW,	1 },
70	{ "rewoffl",	MTOFFL,	1 },
71	{ "status",	MTNOP,	1 },
72	{ "weof",	MTWEOF,	0 },
73	{ "erase",	MTERASE, 0 }, /* Andreas Klemm <andreas@knobel.gun.de */
74	{ NULL }
75};
76
77void err __P((const char *, ...));
78void printreg __P((char *, u_int, char *));
79void status __P((struct mtget *));
80void usage __P((void));
81
82int
83main(argc, argv)
84	int argc;
85	char *argv[];
86{
87	register struct commands *comp;
88	struct mtget mt_status;
89	struct mtop mt_com;
90	int ch, len, mtfd;
91	char *p, *tape;
92
93	if ((tape = getenv("TAPE")) == NULL)
94		tape = DEFTAPE;
95
96	while ((ch = getopt(argc, argv, "f:t:")) != EOF)
97		switch(ch) {
98		case 'f':
99		case 't':
100			tape = optarg;
101			break;
102		case '?':
103		default:
104			usage();
105		}
106	argc -= optind;
107	argv += optind;
108
109	if (argc < 1 || argc > 2)
110		usage();
111
112	len = strlen(p = *argv++);
113	for (comp = com;; comp++) {
114		if (comp->c_name == NULL)
115			err("%s: unknown command", p);
116		if (strncmp(p, comp->c_name, len) == 0)
117			break;
118	}
119	if ((mtfd = open(tape, comp->c_ronly ? O_RDONLY : O_RDWR)) < 0)
120		err("%s: %s", tape, strerror(errno));
121	if (comp->c_code != MTNOP) {
122		mt_com.mt_op = comp->c_code;
123		if (*argv) {
124			mt_com.mt_count = strtol(*argv, &p, 10);
125			if (mt_com.mt_count <= 0 || *p)
126				err("%s: illegal count", *argv);
127		}
128		else
129			mt_com.mt_count = 1;
130		if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
131			err("%s: %s: %s", tape, comp->c_name, strerror(errno));
132	} else {
133		if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
134			err("%s", strerror(errno));
135		status(&mt_status);
136	}
137	exit (0);
138	/* NOTREACHED */
139}
140
141#ifdef vax
142#include <vax/mba/mtreg.h>
143#include <vax/mba/htreg.h>
144
145#include <vax/uba/utreg.h>
146#include <vax/uba/tmreg.h>
147#undef b_repcnt		/* argh */
148#include <vax/uba/tsreg.h>
149#endif
150
151#ifdef sun
152#include <sundev/tmreg.h>
153#include <sundev/arreg.h>
154#endif
155
156#ifdef tahoe
157#include <tahoe/vba/cyreg.h>
158#endif
159
160struct tape_desc {
161	short	t_type;		/* type of magtape device */
162	char	*t_name;	/* printing name */
163	char	*t_dsbits;	/* "drive status" register */
164	char	*t_erbits;	/* "error" register */
165} tapes[] = {
166#ifdef vax
167	{ MT_ISTS,	"ts11",		0,		TSXS0_BITS },
168	{ MT_ISHT,	"tm03",		HTDS_BITS,	HTER_BITS },
169	{ MT_ISTM,	"tm11",		0,		TMER_BITS },
170	{ MT_ISMT,	"tu78",		MTDS_BITS,	0 },
171	{ MT_ISUT,	"tu45",		UTDS_BITS,	UTER_BITS },
172#endif
173#ifdef sun
174	{ MT_ISCPC,	"TapeMaster",	TMS_BITS,	0 },
175	{ MT_ISAR,	"Archive",	ARCH_CTRL_BITS,	ARCH_BITS },
176#endif
177#ifdef tahoe
178	{ MT_ISCY,	"cipher",	CYS_BITS,	CYCW_BITS },
179#endif
180	{ 0 }
181};
182
183/*
184 * Interpret the status buffer returned
185 */
186void
187status(bp)
188	register struct mtget *bp;
189{
190	register struct tape_desc *mt;
191
192	for (mt = tapes;; mt++) {
193		if (mt->t_type == 0) {
194			(void)printf("%d: unknown tape drive type\n",
195			    bp->mt_type);
196			return;
197		}
198		if (mt->t_type == bp->mt_type)
199			break;
200	}
201	(void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid);
202	printreg("ds", bp->mt_dsreg, mt->t_dsbits);
203	printreg("\ner", bp->mt_erreg, mt->t_erbits);
204	(void)putchar('\n');
205}
206
207/*
208 * Print a register a la the %b format of the kernel's printf.
209 */
210void
211printreg(s, v, bits)
212	char *s;
213	register u_int v;
214	register char *bits;
215{
216	register int i, any = 0;
217	register char c;
218
219	if (bits && *bits == 8)
220		printf("%s=%o", s, v);
221	else
222		printf("%s=%x", s, v);
223	bits++;
224	if (v && bits) {
225		putchar('<');
226		while (i = *bits++) {
227			if (v & (1 << (i-1))) {
228				if (any)
229					putchar(',');
230				any = 1;
231				for (; (c = *bits) > 32; bits++)
232					putchar(c);
233			} else
234				for (; *bits > 32; bits++)
235					;
236		}
237		putchar('>');
238	}
239}
240
241void
242usage()
243{
244	(void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n");
245	exit(1);
246}
247
248#if __STDC__
249#include <stdarg.h>
250#else
251#include <varargs.h>
252#endif
253
254void
255#if __STDC__
256err(const char *fmt, ...)
257#else
258err(fmt, va_alist)
259	char *fmt;
260        va_dcl
261#endif
262{
263	va_list ap;
264#if __STDC__
265	va_start(ap, fmt);
266#else
267	va_start(ap);
268#endif
269	(void)fprintf(stderr, "mt: ");
270	(void)vfprintf(stderr, fmt, ap);
271	va_end(ap);
272	(void)fprintf(stderr, "\n");
273	exit(1);
274	/* NOTREACHED */
275}
276