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mt.c revision 1.1.1.1
      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
     35 static 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 static 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 struct 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 	{ NULL }
     74 };
     75 
     76 void err __P((const char *, ...));
     77 void printreg __P((char *, u_int, char *));
     78 void status __P((struct mtget *));
     79 void usage __P((void));
     80 
     81 int
     82 main(argc, argv)
     83 	int argc;
     84 	char *argv[];
     85 {
     86 	register struct commands *comp;
     87 	struct mtget mt_status;
     88 	struct mtop mt_com;
     89 	int ch, len, mtfd;
     90 	char *p, *tape;
     91 
     92 	if ((tape = getenv("TAPE")) == NULL)
     93 		tape = DEFTAPE;
     94 
     95 	while ((ch = getopt(argc, argv, "f:t:")) != EOF)
     96 		switch(ch) {
     97 		case 'f':
     98 		case 't':
     99 			tape = optarg;
    100 			break;
    101 		case '?':
    102 		default:
    103 			usage();
    104 		}
    105 	argc -= optind;
    106 	argv += optind;
    107 
    108 	if (argc < 1 || argc > 2)
    109 		usage();
    110 
    111 	len = strlen(p = *argv++);
    112 	for (comp = com;; comp++) {
    113 		if (comp->c_name == NULL)
    114 			err("%s: unknown command", p);
    115 		if (strncmp(p, comp->c_name, len) == 0)
    116 			break;
    117 	}
    118 	if ((mtfd = open(tape, comp->c_ronly ? O_RDONLY : O_RDWR)) < 0)
    119 		err("%s: %s", tape, strerror(errno));
    120 	if (comp->c_code != MTNOP) {
    121 		mt_com.mt_op = comp->c_code;
    122 		if (*argv) {
    123 			mt_com.mt_count = strtol(*argv, &p, 10);
    124 			if (mt_com.mt_count <= 0 || *p)
    125 				err("%s: illegal count", *argv);
    126 		}
    127 		else
    128 			mt_com.mt_count = 1;
    129 		if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
    130 			err("%s: %s: %s", tape, comp->c_name, strerror(errno));
    131 	} else {
    132 		if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
    133 			err("%s", strerror(errno));
    134 		status(&mt_status);
    135 	}
    136 	exit (0);
    137 	/* NOTREACHED */
    138 }
    139 
    140 #ifdef vax
    141 #include <vax/mba/mtreg.h>
    142 #include <vax/mba/htreg.h>
    143 
    144 #include <vax/uba/utreg.h>
    145 #include <vax/uba/tmreg.h>
    146 #undef b_repcnt		/* argh */
    147 #include <vax/uba/tsreg.h>
    148 #endif
    149 
    150 #ifdef sun
    151 #include <sundev/tmreg.h>
    152 #include <sundev/arreg.h>
    153 #endif
    154 
    155 #ifdef tahoe
    156 #include <tahoe/vba/cyreg.h>
    157 #endif
    158 
    159 struct tape_desc {
    160 	short	t_type;		/* type of magtape device */
    161 	char	*t_name;	/* printing name */
    162 	char	*t_dsbits;	/* "drive status" register */
    163 	char	*t_erbits;	/* "error" register */
    164 } tapes[] = {
    165 #ifdef vax
    166 	{ MT_ISTS,	"ts11",		0,		TSXS0_BITS },
    167 	{ MT_ISHT,	"tm03",		HTDS_BITS,	HTER_BITS },
    168 	{ MT_ISTM,	"tm11",		0,		TMER_BITS },
    169 	{ MT_ISMT,	"tu78",		MTDS_BITS,	0 },
    170 	{ MT_ISUT,	"tu45",		UTDS_BITS,	UTER_BITS },
    171 #endif
    172 #ifdef sun
    173 	{ MT_ISCPC,	"TapeMaster",	TMS_BITS,	0 },
    174 	{ MT_ISAR,	"Archive",	ARCH_CTRL_BITS,	ARCH_BITS },
    175 #endif
    176 #ifdef tahoe
    177 	{ MT_ISCY,	"cipher",	CYS_BITS,	CYCW_BITS },
    178 #endif
    179 	{ 0 }
    180 };
    181 
    182 /*
    183  * Interpret the status buffer returned
    184  */
    185 void
    186 status(bp)
    187 	register struct mtget *bp;
    188 {
    189 	register struct tape_desc *mt;
    190 
    191 	for (mt = tapes;; mt++) {
    192 		if (mt->t_type == 0) {
    193 			(void)printf("%d: unknown tape drive type\n",
    194 			    bp->mt_type);
    195 			return;
    196 		}
    197 		if (mt->t_type == bp->mt_type)
    198 			break;
    199 	}
    200 	(void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid);
    201 	printreg("ds", bp->mt_dsreg, mt->t_dsbits);
    202 	printreg("\ner", bp->mt_erreg, mt->t_erbits);
    203 	(void)putchar('\n');
    204 }
    205 
    206 /*
    207  * Print a register a la the %b format of the kernel's printf.
    208  */
    209 void
    210 printreg(s, v, bits)
    211 	char *s;
    212 	register u_int v;
    213 	register char *bits;
    214 {
    215 	register int i, any = 0;
    216 	register char c;
    217 
    218 	if (bits && *bits == 8)
    219 		printf("%s=%o", s, v);
    220 	else
    221 		printf("%s=%x", s, v);
    222 	bits++;
    223 	if (v && bits) {
    224 		putchar('<');
    225 		while (i = *bits++) {
    226 			if (v & (1 << (i-1))) {
    227 				if (any)
    228 					putchar(',');
    229 				any = 1;
    230 				for (; (c = *bits) > 32; bits++)
    231 					putchar(c);
    232 			} else
    233 				for (; *bits > 32; bits++)
    234 					;
    235 		}
    236 		putchar('>');
    237 	}
    238 }
    239 
    240 void
    241 usage()
    242 {
    243 	(void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n");
    244 	exit(1);
    245 }
    246 
    247 #if __STDC__
    248 #include <stdarg.h>
    249 #else
    250 #include <varargs.h>
    251 #endif
    252 
    253 void
    254 #if __STDC__
    255 err(const char *fmt, ...)
    256 #else
    257 err(fmt, va_alist)
    258 	char *fmt;
    259         va_dcl
    260 #endif
    261 {
    262 	va_list ap;
    263 #if __STDC__
    264 	va_start(ap, fmt);
    265 #else
    266 	va_start(ap);
    267 #endif
    268 	(void)fprintf(stderr, "mt: ");
    269 	(void)vfprintf(stderr, fmt, ap);
    270 	va_end(ap);
    271 	(void)fprintf(stderr, "\n");
    272 	exit(1);
    273 	/* NOTREACHED */
    274 }
    275