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 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 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 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 320 usage(void) 321 { 322 (void)fprintf(stderr, "usage: %s [-f device] command [count]\n", 323 getprogname()); 324 exit(1); 325 /* NOTREACHED */ 326 } 327
Indexes created Tue Sep 23 02:09:52 GMT 2025