mt.c revision 1.22
1 /* $NetBSD: mt.c,v 1.22 1997/09/29 19:35:31 mjacob 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)mt.c 8.2 (Berkeley) 6/6/93"; 45 #else 46 __RCSID("$NetBSD: mt.c,v 1.22 1997/09/29 19:35:31 mjacob Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * mt -- 52 * magnetic tape manipulation program 53 */ 54 #include <rmt.h> 55 #include <sys/types.h> 56 #include <sys/ioctl.h> 57 #include <sys/mtio.h> 58 #include <sys/stat.h> 59 60 #include <ctype.h> 61 #include <err.h> 62 #include <fcntl.h> 63 #include <paths.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 69 /* pseudo ioctl constants */ 70 #define MTASF 100 71 72 struct commands { 73 const char *c_name; /* command */ 74 int c_code; /* ioctl code for this command */ 75 int c_ronly; /* open tape read-only */ 76 int c_mincount; /* min allowed count value */ 77 }; 78 79 const struct commands com[] = { 80 { "asf", MTASF, 1, 1 }, 81 { "blocksize", MTSETBSIZ, 1, 0 }, 82 { "bsf", MTBSF, 1, 1 }, 83 { "bsr", MTBSR, 1, 1 }, 84 { "density", MTSETDNSTY, 1, 0 }, 85 { "eof", MTWEOF, 0, 1 }, 86 { "eom", MTEOM, 1, 0 }, 87 { "erase", MTERASE, 0, 0 }, 88 { "fsf", MTFSF, 1, 1 }, 89 { "fsr", MTFSR, 1, 1 }, 90 { "offline", MTOFFL, 1, 0 }, 91 { "rewind", MTREW, 1, 0 }, 92 { "rewoffl", MTOFFL, 1, 0 }, 93 { "status", MTNOP, 1, 0 }, 94 { "retension", MTRETEN, 1, 0 }, 95 { "weof", MTWEOF, 0, 1 }, 96 { "compress", MTCMPRESS, 1, 0 }, 97 { NULL } 98 }; 99 100 void printreg __P((char *, u_int, char *)); 101 void status __P((struct mtget *)); 102 void usage __P((void)); 103 int main __P((int, char *[])); 104 105 int 106 main(argc, argv) 107 int argc; 108 char *argv[]; 109 { 110 const struct commands *comp = (const struct commands *) NULL; 111 struct mtget mt_status; 112 struct mtop mt_com; 113 int ch, len, mtfd, flags; 114 char *p, *tape; 115 int count, spcl; 116 117 if ((tape = getenv("TAPE")) == NULL) 118 tape = _PATH_DEFTAPE; 119 120 while ((ch = getopt(argc, argv, "f:t:")) != -1) 121 switch (ch) { 122 case 'f': 123 case 't': 124 tape = optarg; 125 break; 126 case '?': 127 default: 128 usage(); 129 } 130 argc -= optind; 131 argv += optind; 132 133 if (argc < 1 || argc > 2) 134 usage(); 135 136 if (strcmp(*argv, "rdspos") == 0) { 137 count = 0; 138 spcl = MTIOCRDSPOS; 139 flags = O_RDONLY; 140 } else if (strcmp(*argv, "rdhpos") == 0) { 141 count = 0; 142 spcl = MTIOCRDHPOS; 143 flags = O_RDONLY; 144 } else if (strcmp(*argv, "setspos") == 0) { 145 spcl = MTIOCSLOCATE; 146 flags = O_RDONLY; 147 148 ++argv; 149 if ((p = *argv) != NULL) { 150 count = strtol(*argv, &p, 0); 151 if (p == *argv) { 152 fprintf(stderr, "%s: illegal block address\n", p); 153 exit(1); 154 } 155 } else { 156 fprintf(stderr, "MTIOSLOCATE: missing block address\n"); 157 exit(1); 158 } 159 } else if (strcmp(*argv, "sethpos") == 0) { 160 spcl = MTIOCHLOCATE; 161 flags = O_RDONLY; 162 163 ++argv; 164 if ((p = *argv) != NULL) { 165 count = strtol(*argv, &p, 0); 166 if (p == *argv) { 167 fprintf(stderr, "%s: illegal block address\n", p); 168 exit(1); 169 } 170 } else { 171 fprintf(stderr, "MTIOHLOCATE: missing block address\n"); 172 exit(1); 173 } 174 } else { 175 176 len = strlen(p = *argv++); 177 for (comp = com;; comp++) { 178 if (comp->c_name == NULL) 179 errx(1, "%s: unknown command", p); 180 if (strncmp(p, comp->c_name, len) == 0) 181 break; 182 } 183 184 if (*argv) { 185 count = strtol(*argv, &p, 10); 186 if (count < comp->c_mincount || *p) 187 errx(2, "%s: illegal count", *argv); 188 } else 189 count = 1; 190 flags = comp->c_ronly ? O_RDONLY : O_WRONLY; 191 spcl = 0; 192 } 193 194 if ((mtfd = open(tape, flags)) < 0) 195 err(2, "%s", tape); 196 197 if (spcl) { 198 int doset = (count != 0); 199 if (ioctl(mtfd, spcl, (caddr_t) &count) < 0) { 200 err(2, "%s", tape); 201 } else if (doset) { 202 printf("%s: block location set to %u\n", tape, 203 (unsigned int) count); 204 } else { 205 printf("%s: block location %u\n", tape, 206 (unsigned int) count); 207 } 208 } else if (comp->c_code == MTASF) { 209 /* If mtget.mt_fileno was implemented, We could 210 compute the minimal seek needed to position 211 the tape. Until then, rewind and seek from 212 begining-of-tape */ 213 214 mt_com.mt_op = MTREW; 215 mt_com.mt_count = 1; 216 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 217 err(2, "%s", tape); 218 219 mt_com.mt_op = MTFSF; 220 mt_com.mt_count = count; 221 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 222 err(2, "%s", tape); 223 224 } else if (comp->c_code != MTNOP) { 225 mt_com.mt_op = comp->c_code; 226 mt_com.mt_count = count; 227 228 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 229 err(2, "%s: %s", tape, comp->c_name); 230 231 } else { 232 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 233 err(2, "%s: %s", tape, comp->c_name); 234 status(&mt_status); 235 } 236 237 exit(0); 238 /* NOTREACHED */ 239 } 240 241 #ifdef sun 242 #include <sundev/tmreg.h> 243 #include <sundev/arreg.h> 244 #endif 245 246 #ifdef tahoe 247 #include <tahoe/vba/cyreg.h> 248 #endif 249 250 struct tape_desc { 251 short t_type; /* type of magtape device */ 252 char *t_name; /* printing name */ 253 char *t_dsbits; /* "drive status" register */ 254 char *t_erbits; /* "error" register */ 255 } tapes[] = { 256 #ifdef sun 257 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 258 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 259 #endif 260 #ifdef tahoe 261 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 262 #endif 263 { 0x7, "SCSI", "76543210", "76543210" }, 264 { 0 } 265 }; 266 267 /* 268 * Interpret the status buffer returned 269 */ 270 void 271 status(bp) 272 struct mtget *bp; 273 { 274 struct tape_desc *mt; 275 276 for (mt = tapes;; mt++) { 277 if (mt->t_type == 0) { 278 (void)printf("%d: unknown tape drive type\n", 279 bp->mt_type); 280 return; 281 } 282 if (mt->t_type == bp->mt_type) 283 break; 284 } 285 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 286 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 287 printreg("\ner", bp->mt_erreg, mt->t_erbits); 288 (void)putchar('\n'); 289 (void)printf("blocksize: %d (%d, %d, %d, %d)\n", 290 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], 291 bp->mt_mblksiz[2], bp->mt_mblksiz[3]); 292 (void)printf("density: %d (%d, %d, %d, %d)\n", 293 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], 294 bp->mt_mdensity[2], bp->mt_mdensity[3]); 295 } 296 297 /* 298 * Print a register a la the %b format of the kernel's printf. 299 */ 300 void 301 printreg(s, v, bits) 302 char *s; 303 u_int v; 304 char *bits; 305 { 306 int i, any = 0; 307 char c; 308 309 if (bits && *bits == 8) 310 printf("%s=%o", s, v); 311 else 312 printf("%s=%x", s, v); 313 bits++; 314 if (v && bits) { 315 putchar('<'); 316 while ((i = *bits++)) { 317 if (v & (1 << (i-1))) { 318 if (any) 319 putchar(','); 320 any = 1; 321 for (; (c = *bits) > 32; bits++) 322 putchar(c); 323 } else 324 for (; *bits > 32; bits++) 325 ; 326 } 327 putchar('>'); 328 } 329 } 330 331 void 332 usage() 333 { 334 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 335 exit(1); 336 } 337
Indexes created Wed Sep 24 05:09:52 GMT 2025