mt.c revision 1.47
1 /* $NetBSD: mt.c,v 1.47 2011/08/29 14:46:01 joerg 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 1.47 2011/08/29 14:46:01 joerg 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 { .c_name = NULL } 105 }; 106 107 static void printreg(const char *, u_int, const char *); 108 static void status(struct mtget *); 109 __dead static void usage(void); 110 111 int 112 main(int argc, char *argv[]) 113 { 114 const struct commands *cp, *comp; 115 struct mtget mt_status; 116 struct mtop mt_com; 117 int ch, mtfd, flags; 118 char *p; 119 const char *tape; 120 int count; 121 size_t len; 122 123 setprogname(argv[0]); 124 if ((tape = getenv("TAPE")) == NULL) 125 tape = _PATH_DEFTAPE; 126 127 while ((ch = getopt(argc, argv, "f:t:")) != -1) 128 switch (ch) { 129 case 'f': 130 case 't': 131 tape = optarg; 132 break; 133 case '?': 134 default: 135 usage(); 136 } 137 argc -= optind; 138 argv += optind; 139 140 if (argc < 1 || argc > 2) 141 usage(); 142 143 len = strlen(p = *argv++); 144 for (comp = NULL, cp = com; cp->c_name != NULL; cp++) { 145 size_t clen = MIN(len, cp->c_namelen); 146 if (strncmp(p, cp->c_name, clen) == 0) { 147 if (comp != NULL) 148 errx(1, "%s: Ambiguous command `%s' or `%s'?", 149 p, cp->c_name, comp->c_name); 150 else 151 comp = cp; 152 } 153 } 154 if (comp == NULL) 155 errx(1, "%s: unknown command", p); 156 157 if (*argv) { 158 count = strtol(*argv, &p, 10); 159 if (count < comp->c_mincount || *p) 160 errx(2, "%s: illegal count", *argv); 161 } else 162 count = 1; 163 164 flags = comp->c_ronly ? O_RDONLY : O_WRONLY; 165 166 if ((mtfd = open(tape, flags)) < 0) 167 err(2, "%s", tape); 168 169 switch (comp->c_spcl) { 170 case MTIOCTOP: 171 if (comp->c_code == MTASF) { 172 173 /* If mtget.mt_fileno was implemented, We could 174 compute the minimal seek needed to position 175 the tape. Until then, rewind and seek from 176 begining-of-tape */ 177 178 mt_com.mt_op = MTREW; 179 mt_com.mt_count = 1; 180 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 181 err(2, "%s", tape); 182 183 if (count > 0) { 184 mt_com.mt_op = MTFSF; 185 mt_com.mt_count = count; 186 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 187 err(2, "%s", tape); 188 } 189 190 } else { 191 mt_com.mt_op = comp->c_code; 192 mt_com.mt_count = count; 193 194 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 195 err(2, "%s: %s", tape, comp->c_name); 196 197 } 198 break; 199 200 case MTIOCGET: 201 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 202 err(2, "%s: %s", tape, comp->c_name); 203 status(&mt_status); 204 break; 205 206 case MTIOCRDSPOS: 207 case MTIOCRDHPOS: 208 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) 209 err(2, "%s", tape); 210 printf("%s: block location %u\n", tape, (unsigned int) count); 211 break; 212 213 case MTIOCSLOCATE: 214 case MTIOCHLOCATE: 215 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) 216 err(2, "%s", tape); 217 break; 218 219 default: 220 errx(1, "internal error: unknown request %ld", comp->c_spcl); 221 } 222 223 exit(0); 224 /* NOTREACHED */ 225 } 226 227 #if defined(sun) && !defined(__SVR4) 228 #include <sundev/tmreg.h> 229 #include <sundev/arreg.h> 230 #endif 231 232 #ifdef tahoe 233 #include <tahoe/vba/cyreg.h> 234 #endif 235 236 static const struct tape_desc { 237 short t_type; /* type of magtape device */ 238 const char *t_name; /* printing name */ 239 const char *t_dsbits; /* "drive status" register */ 240 const char *t_erbits; /* "error" register */ 241 } tapes[] = { 242 #if defined(sun) && !defined(__SVR4) 243 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 244 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 245 #endif 246 #ifdef tahoe 247 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 248 #endif 249 #define SCSI_DS_BITS "\20\5WriteProtect\2Mounted" 250 { 0x7, "SCSI", SCSI_DS_BITS, "76543210" }, 251 { .t_type = 0 } 252 }; 253 254 255 /* 256 * Interpret the status buffer returned 257 */ 258 static void 259 status(struct mtget *bp) 260 { 261 const struct tape_desc *mt; 262 263 for (mt = tapes;; mt++) { 264 if (mt->t_type == 0) { 265 (void)printf("%d: unknown tape drive type\n", 266 bp->mt_type); 267 return; 268 } 269 if (mt->t_type == bp->mt_type) 270 break; 271 } 272 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 273 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 274 printreg("\ner", bp->mt_erreg, mt->t_erbits); 275 (void)putchar('\n'); 276 (void)printf("blocksize: %d (%d, %d, %d, %d)\n", 277 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], 278 bp->mt_mblksiz[2], bp->mt_mblksiz[3]); 279 (void)printf("density: %d (%d, %d, %d, %d)\n", 280 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], 281 bp->mt_mdensity[2], bp->mt_mdensity[3]); 282 (void)printf("current file number: %d\n", bp->mt_fileno); 283 (void)printf("current block number: %d\n", bp->mt_blkno); 284 } 285 286 /* 287 * Print a register a la the %b format of the kernel's printf. 288 */ 289 static void 290 printreg(const char *s, u_int v, const char *bits) 291 { 292 int any, i; 293 char c; 294 295 any = 0; 296 if (bits && *bits == 8) 297 printf("%s=%o", s, v); 298 else 299 printf("%s=%x", s, v); 300 if (v && bits && *++bits) { 301 putchar('<'); 302 while ((i = *bits++)) { 303 if (v & (1 << (i-1))) { 304 if (any) 305 putchar(','); 306 any = 1; 307 for (; (c = *bits) > 32; bits++) 308 putchar(c); 309 } else 310 for (; *bits > 32; bits++) 311 ; 312 } 313 putchar('>'); 314 } 315 } 316 317 static void 318 usage(void) 319 { 320 (void)fprintf(stderr, "usage: %s [-f device] command [count]\n", 321 getprogname()); 322 exit(1); 323 /* NOTREACHED */ 324 } 325
Indexes created Mon Sep 29 21:09:56 GMT 2025