1 /* $NetBSD: mt.c,v 1.32 1999/09/07 13:56:53 simonb 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 1.32 1999/09/07 13:56:53 simonb Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * mt -- 52 * magnetic tape manipulation program 53 */ 54 #include <sys/types.h> 55 #include <sys/ioctl.h> 56 #include <sys/mtio.h> 57 #include <sys/stat.h> 58 59 #include <ctype.h> 60 #include <err.h> 61 #include <fcntl.h> 62 #include <paths.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 68 #include <rmt.h> 69 70 /* pseudo ioctl constants */ 71 #define MTASF 100 72 73 struct commands { 74 const char *c_name; /* command */ 75 int c_spcl; /* ioctl request */ 76 int c_code; /* ioctl code for MTIOCTOP command */ 77 int c_ronly; /* open tape read-only */ 78 int c_mincount; /* min allowed count value */ 79 }; 80 81 const struct commands com[] = { 82 { "asf", MTIOCTOP, MTASF, 1, 1 }, 83 { "blocksize", MTIOCTOP, MTSETBSIZ, 1, 0 }, 84 { "bsf", MTIOCTOP, MTBSF, 1, 1 }, 85 { "bsr", MTIOCTOP, MTBSR, 1, 1 }, 86 { "compress", MTIOCTOP, MTCMPRESS, 1, 0 }, 87 { "density", MTIOCTOP, MTSETDNSTY, 1, 0 }, 88 { "eof", MTIOCTOP, MTWEOF, 0, 1 }, 89 { "eom", MTIOCTOP, MTEOM, 1, 0 }, 90 { "erase", MTIOCTOP, MTERASE, 0, 0 }, 91 { "fsf", MTIOCTOP, MTFSF, 1, 1 }, 92 { "fsr", MTIOCTOP, MTFSR, 1, 1 }, 93 { "offline", MTIOCTOP, MTOFFL, 1, 0 }, 94 { "rdhpos", MTIOCRDHPOS, 0, 1, 0 }, 95 { "rdspos", MTIOCRDSPOS, 0, 1, 0 }, 96 { "retension", MTIOCTOP, MTRETEN, 1, 0 }, 97 { "rewind", MTIOCTOP, MTREW, 1, 0 }, 98 { "rewoffl", MTIOCTOP, MTOFFL, 1, 0 }, 99 { "setblk", MTIOCTOP, MTSETBSIZ, 1, 0 }, 100 { "setdensity", MTIOCTOP, MTSETDNSTY, 1, 0 }, 101 { "sethpos", MTIOCHLOCATE, 0, 1, 0 }, 102 { "setspos", MTIOCSLOCATE, 0, 1, 0 }, 103 { "status", MTIOCGET, MTNOP, 1, 0 }, 104 { "weof", MTIOCTOP, MTWEOF, 0, 1 }, 105 { "eew", MTIOCTOP, MTEWARN, 1, 0 }, 106 { NULL } 107 }; 108 109 void printreg __P((const char *, u_int, const char *)); 110 void status __P((struct mtget *)); 111 void usage __P((void)); 112 int main __P((int, char *[])); 113 114 int 115 main(argc, argv) 116 int argc; 117 char *argv[]; 118 { 119 const struct commands *comp = (const struct commands *) NULL; 120 struct mtget mt_status; 121 struct mtop mt_com; 122 int ch, len, mtfd, flags; 123 char *p; 124 const char *tape; 125 int count; 126 127 if ((tape = getenv("TAPE")) == NULL) 128 tape = _PATH_DEFTAPE; 129 130 while ((ch = getopt(argc, argv, "f:t:")) != -1) 131 switch (ch) { 132 case 'f': 133 case 't': 134 tape = optarg; 135 break; 136 case '?': 137 default: 138 usage(); 139 } 140 argc -= optind; 141 argv += optind; 142 143 if (argc < 1 || argc > 2) 144 usage(); 145 146 len = strlen(p = *argv++); 147 for (comp = com;; comp++) { 148 if (comp->c_name == NULL) 149 errx(1, "%s: unknown command", p); 150 if (strncmp(p, comp->c_name, len) == 0) 151 break; 152 } 153 154 if (*argv) { 155 count = strtol(*argv, &p, 10); 156 if (count < comp->c_mincount || *p) 157 errx(2, "%s: illegal count", *argv); 158 } else 159 count = 1; 160 161 flags = comp->c_ronly ? O_RDONLY : O_WRONLY; 162 163 if ((mtfd = open(tape, flags)) < 0) 164 err(2, "%s", tape); 165 166 switch (comp->c_spcl) { 167 case MTIOCTOP: 168 if (comp->c_code == MTASF) { 169 /* If mtget.mt_fileno was implemented, We could 170 compute the minimal seek needed to position 171 the tape. Until then, rewind and seek from 172 begining-of-tape */ 173 174 mt_com.mt_op = MTREW; 175 mt_com.mt_count = 1; 176 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 177 err(2, "%s", tape); 178 179 mt_com.mt_op = MTFSF; 180 mt_com.mt_count = count; 181 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 182 err(2, "%s", tape); 183 184 } else { 185 mt_com.mt_op = comp->c_code; 186 mt_com.mt_count = count; 187 188 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 189 err(2, "%s: %s", tape, comp->c_name); 190 191 } 192 break; 193 194 case MTIOCGET: 195 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 196 err(2, "%s: %s", tape, comp->c_name); 197 status(&mt_status); 198 break; 199 200 case MTIOCRDSPOS: 201 case MTIOCRDHPOS: 202 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) 203 err(2, "%s", tape); 204 printf("%s: block location %u\n", tape, (unsigned int) count); 205 break; 206 207 case MTIOCSLOCATE: 208 case MTIOCHLOCATE: 209 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) 210 err(2, "%s", tape); 211 break; 212 213 default: 214 errx(1, "internal error: unknown request %d", comp->c_spcl); 215 } 216 217 exit(0); 218 /* NOTREACHED */ 219 } 220 221 #if defined(sun) && !defined(__SVR4) 222 #include <sundev/tmreg.h> 223 #include <sundev/arreg.h> 224 #endif 225 226 #ifdef tahoe 227 #include <tahoe/vba/cyreg.h> 228 #endif 229 230 const struct tape_desc { 231 short t_type; /* type of magtape device */ 232 const char *t_name; /* printing name */ 233 const char *t_dsbits; /* "drive status" register */ 234 const char *t_erbits; /* "error" register */ 235 } tapes[] = { 236 #if defined(sun) && !defined(__SVR4) 237 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 238 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 239 #endif 240 #ifdef tahoe 241 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 242 #endif 243 #define SCSI_DS_BITS "\20\5WriteProtect\2Mounted" 244 { 0x7, "SCSI", SCSI_DS_BITS, "76543210" }, 245 { 0 } 246 }; 247 248 249 /* 250 * Interpret the status buffer returned 251 */ 252 void 253 status(bp) 254 struct mtget *bp; 255 { 256 const struct tape_desc *mt; 257 258 for (mt = tapes;; mt++) { 259 if (mt->t_type == 0) { 260 (void)printf("%d: unknown tape drive type\n", 261 bp->mt_type); 262 return; 263 } 264 if (mt->t_type == bp->mt_type) 265 break; 266 } 267 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 268 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 269 printreg("\ner", bp->mt_erreg, mt->t_erbits); 270 (void)putchar('\n'); 271 (void)printf("blocksize: %d (%d, %d, %d, %d)\n", 272 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], 273 bp->mt_mblksiz[2], bp->mt_mblksiz[3]); 274 (void)printf("density: %d (%d, %d, %d, %d)\n", 275 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], 276 bp->mt_mdensity[2], bp->mt_mdensity[3]); 277 (void)printf("current file number: %d\n", bp->mt_fileno); 278 (void)printf("current block number: %d\n", bp->mt_blkno); 279 } 280 281 /* 282 * Print a register a la the %b format of the kernel's printf. 283 */ 284 void 285 printreg(s, v, bits) 286 const char *s; 287 u_int v; 288 const char *bits; 289 { 290 int i, any = 0; 291 char c; 292 293 if (bits && *bits == 8) 294 printf("%s=%o", s, v); 295 else 296 printf("%s=%x", s, v); 297 bits++; 298 if (v && *bits) { 299 putchar('<'); 300 while ((i = *bits++)) { 301 if (v & (1 << (i-1))) { 302 if (any) 303 putchar(','); 304 any = 1; 305 for (; (c = *bits) > 32; bits++) 306 putchar(c); 307 } else 308 for (; *bits > 32; bits++) 309 ; 310 } 311 putchar('>'); 312 } 313 } 314 315 void 316 usage() 317 { 318 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 319 exit(1); 320 /* NOTREACHED */ 321 } 322