1 /* $NetBSD: mt.c,v 1.49 2022/01/24 09:14:36 andvar Exp $ */
2
3 /*
4 * Copyright (c) 1980, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\
35 The Regents of the University of California. All rights reserved.");
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)mt.c 8.2 (Berkeley) 6/6/93";
41 #else
42 __RCSID("$NetBSD: mt.c,v 1.49 2022/01/24 09:14:36 andvar Exp $");
43 #endif
44 #endif /* not lint */
45
46 /*
47 * mt --
48 * magnetic tape manipulation program
49 */
50 #include <sys/types.h>
51 #include <sys/param.h>
52 #include <sys/ioctl.h>
53 #include <sys/mtio.h>
54 #include <sys/stat.h>
55
56 #include <ctype.h>
57 #include <err.h>
58 #include <fcntl.h>
59 #include <paths.h>
60 #include <rmt.h>
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <string.h>
64 #include <unistd.h>
65
66 /* pseudo ioctl constants */
67 #define MTASF 100
68
69 struct commands {
70 const char *c_name; /* command */
71 size_t c_namelen; /* command len */
72 u_long c_spcl; /* ioctl request */
73 int c_code; /* ioctl code for MTIOCTOP command */
74 int c_ronly; /* open tape read-only */
75 int c_mincount; /* min allowed count value */
76 };
77
78 #define CMD(a) a, sizeof(a) - 1
79 static const struct commands com[] = {
80 { CMD("asf"), MTIOCTOP, MTASF, 1, 0 },
81 { CMD("blocksize"), MTIOCTOP, MTSETBSIZ, 1, 0 },
82 { CMD("bsf"), MTIOCTOP, MTBSF, 1, 1 },
83 { CMD("bsr"), MTIOCTOP, MTBSR, 1, 1 },
84 { CMD("compress"), MTIOCTOP, MTCMPRESS, 1, 0 },
85 { CMD("density"), MTIOCTOP, MTSETDNSTY, 1, 0 },
86 { CMD("eof"), MTIOCTOP, MTWEOF, 0, 1 },
87 { CMD("eom"), MTIOCTOP, MTEOM, 1, 0 },
88 { CMD("erase"), MTIOCTOP, MTERASE, 0, 0 },
89 { CMD("fsf"), MTIOCTOP, MTFSF, 1, 1 },
90 { CMD("fsr"), MTIOCTOP, MTFSR, 1, 1 },
91 { CMD("offline"), MTIOCTOP, MTOFFL, 1, 0 },
92 { CMD("rdhpos"), MTIOCRDHPOS, 0, 1, 0 },
93 { CMD("rdspos"), MTIOCRDSPOS, 0, 1, 0 },
94 { CMD("retension"), MTIOCTOP, MTRETEN, 1, 0 },
95 { CMD("rewind"), MTIOCTOP, MTREW, 1, 0 },
96 { CMD("rewoffl"), MTIOCTOP, MTOFFL, 1, 0 },
97 { CMD("setblk"), MTIOCTOP, MTSETBSIZ, 1, 0 },
98 { CMD("setdensity"), MTIOCTOP, MTSETDNSTY, 1, 0 },
99 { CMD("sethpos"), MTIOCHLOCATE, 0, 1, 0 },
100 { CMD("setspos"), MTIOCSLOCATE, 0, 1, 0 },
101 { CMD("status"), MTIOCGET, MTNOP, 1, 0 },
102 { CMD("weof"), MTIOCTOP, MTWEOF, 0, 1 },
103 { CMD("eew"), MTIOCTOP, MTEWARN, 1, 0 },
104 { CMD("cache"), MTIOCTOP, MTCACHE, 1, 0 },
105 { CMD("nocache"), MTIOCTOP, MTNOCACHE, 1, 0 },
106 { .c_name = NULL }
107 };
108
109 static void printreg(const char *, u_int, const char *);
110 static void status(struct mtget *);
111 __dead static void usage(void);
112
113 int
main(int argc,char * argv[])114 main(int argc, char *argv[])
115 {
116 const struct commands *cp, *comp;
117 struct mtget mt_status;
118 struct mtop mt_com;
119 int ch, mtfd, flags;
120 char *p;
121 const char *tape;
122 int count;
123 size_t len;
124
125 setprogname(argv[0]);
126 if ((tape = getenv("TAPE")) == NULL)
127 tape = _PATH_DEFTAPE;
128
129 while ((ch = getopt(argc, argv, "f:t:")) != -1)
130 switch (ch) {
131 case 'f':
132 case 't':
133 tape = optarg;
134 break;
135 case '?':
136 default:
137 usage();
138 }
139 argc -= optind;
140 argv += optind;
141
142 if (argc < 1 || argc > 2)
143 usage();
144
145 len = strlen(p = *argv++);
146 for (comp = NULL, cp = com; cp->c_name != NULL; cp++) {
147 size_t clen = MIN(len, cp->c_namelen);
148 if (strncmp(p, cp->c_name, clen) == 0) {
149 if (comp != NULL)
150 errx(1, "%s: Ambiguous command `%s' or `%s'?",
151 p, cp->c_name, comp->c_name);
152 else
153 comp = cp;
154 }
155 }
156 if (comp == NULL)
157 errx(1, "%s: unknown command", p);
158
159 if (*argv) {
160 count = strtol(*argv, &p, 10);
161 if (count < comp->c_mincount || *p)
162 errx(2, "%s: illegal count", *argv);
163 } else
164 count = 1;
165
166 flags = comp->c_ronly ? O_RDONLY : O_WRONLY;
167
168 if ((mtfd = open(tape, flags)) < 0)
169 err(2, "%s", tape);
170
171 switch (comp->c_spcl) {
172 case MTIOCTOP:
173 if (comp->c_code == MTASF) {
174
175 /* If mtget.mt_fileno was implemented, We could
176 compute the minimal seek needed to position
177 the tape. Until then, rewind and seek from
178 beginning-of-tape */
179
180 mt_com.mt_op = MTREW;
181 mt_com.mt_count = 1;
182 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
183 err(2, "%s", tape);
184
185 if (count > 0) {
186 mt_com.mt_op = MTFSF;
187 mt_com.mt_count = count;
188 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
189 err(2, "%s", tape);
190 }
191
192 } else {
193 mt_com.mt_op = comp->c_code;
194 mt_com.mt_count = count;
195
196 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
197 err(2, "%s: %s", tape, comp->c_name);
198
199 }
200 break;
201
202 case MTIOCGET:
203 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
204 err(2, "%s: %s", tape, comp->c_name);
205 status(&mt_status);
206 break;
207
208 case MTIOCRDSPOS:
209 case MTIOCRDHPOS:
210 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0)
211 err(2, "%s", tape);
212 printf("%s: block location %u\n", tape, (unsigned int) count);
213 break;
214
215 case MTIOCSLOCATE:
216 case MTIOCHLOCATE:
217 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0)
218 err(2, "%s", tape);
219 break;
220
221 default:
222 errx(1, "internal error: unknown request %ld", comp->c_spcl);
223 }
224
225 exit(0);
226 /* NOTREACHED */
227 }
228
229 #if defined(sun) && !defined(__SVR4)
230 #include <sundev/tmreg.h>
231 #include <sundev/arreg.h>
232 #endif
233
234 #ifdef tahoe
235 #include <tahoe/vba/cyreg.h>
236 #endif
237
238 static const struct tape_desc {
239 short t_type; /* type of magtape device */
240 const char *t_name; /* printing name */
241 const char *t_dsbits; /* "drive status" register */
242 const char *t_erbits; /* "error" register */
243 } tapes[] = {
244 #if defined(sun) && !defined(__SVR4)
245 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 },
246 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS },
247 #endif
248 #ifdef tahoe
249 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS },
250 #endif
251 #define SCSI_DS_BITS "\20\5WriteProtect\2Mounted"
252 { 0x7, "SCSI", SCSI_DS_BITS, "76543210" },
253 { .t_type = 0 }
254 };
255
256
257 /*
258 * Interpret the status buffer returned
259 */
260 static void
status(struct mtget * bp)261 status(struct mtget *bp)
262 {
263 const struct tape_desc *mt;
264
265 for (mt = tapes;; mt++) {
266 if (mt->t_type == 0) {
267 (void)printf("%d: unknown tape drive type\n",
268 bp->mt_type);
269 return;
270 }
271 if (mt->t_type == bp->mt_type)
272 break;
273 }
274 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid);
275 printreg("ds", bp->mt_dsreg, mt->t_dsbits);
276 printreg("\ner", bp->mt_erreg, mt->t_erbits);
277 (void)putchar('\n');
278 (void)printf("blocksize: %d (%d, %d, %d, %d)\n",
279 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1],
280 bp->mt_mblksiz[2], bp->mt_mblksiz[3]);
281 (void)printf("density: %d (%d, %d, %d, %d)\n",
282 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1],
283 bp->mt_mdensity[2], bp->mt_mdensity[3]);
284 (void)printf("current file number: %d\n", bp->mt_fileno);
285 (void)printf("current block number: %d\n", bp->mt_blkno);
286 }
287
288 /*
289 * Print a register a la the %b format of the kernel's printf.
290 */
291 static void
printreg(const char * s,u_int v,const char * bits)292 printreg(const char *s, u_int v, const char *bits)
293 {
294 int any, i;
295 char c;
296
297 any = 0;
298 if (bits && *bits == 8)
299 printf("%s=%o", s, v);
300 else
301 printf("%s=%x", s, v);
302 if (v && bits && *++bits) {
303 putchar('<');
304 while ((i = *bits++)) {
305 if (v & (1 << (i-1))) {
306 if (any)
307 putchar(',');
308 any = 1;
309 for (; (c = *bits) > 32; bits++)
310 putchar(c);
311 } else
312 for (; *bits > 32; bits++)
313 ;
314 }
315 putchar('>');
316 }
317 }
318
319 static void
usage(void)320 usage(void)
321 {
322 (void)fprintf(stderr, "usage: %s [-f device] command [count]\n",
323 getprogname());
324 exit(1);
325 /* NOTREACHED */
326 }
327