1 /* $NetBSD: mt.c,v 1.37 2003/08/07 09:05:17 agc 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\n\ 35 The Regents of the University of California. All rights reserved.\n"); 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 1.37 2003/08/07 09:05:17 agc 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/ioctl.h> 52 #include <sys/mtio.h> 53 #include <sys/stat.h> 54 55 #include <ctype.h> 56 #include <err.h> 57 #include <fcntl.h> 58 #include <paths.h> 59 #include <rmt.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 /* pseudo ioctl constants */ 66 #define MTASF 100 67 68 struct commands { 69 const char *c_name; /* command */ 70 int c_spcl; /* ioctl request */ 71 int c_code; /* ioctl code for MTIOCTOP command */ 72 int c_ronly; /* open tape read-only */ 73 int c_mincount; /* min allowed count value */ 74 }; 75 76 const struct commands com[] = { 77 { "asf", MTIOCTOP, MTASF, 1, 0 }, 78 { "blocksize", MTIOCTOP, MTSETBSIZ, 1, 0 }, 79 { "bsf", MTIOCTOP, MTBSF, 1, 1 }, 80 { "bsr", MTIOCTOP, MTBSR, 1, 1 }, 81 { "compress", MTIOCTOP, MTCMPRESS, 1, 0 }, 82 { "density", MTIOCTOP, MTSETDNSTY, 1, 0 }, 83 { "eof", MTIOCTOP, MTWEOF, 0, 1 }, 84 { "eom", MTIOCTOP, MTEOM, 1, 0 }, 85 { "erase", MTIOCTOP, MTERASE, 0, 0 }, 86 { "fsf", MTIOCTOP, MTFSF, 1, 1 }, 87 { "fsr", MTIOCTOP, MTFSR, 1, 1 }, 88 { "offline", MTIOCTOP, MTOFFL, 1, 0 }, 89 { "rdhpos", MTIOCRDHPOS, 0, 1, 0 }, 90 { "rdspos", MTIOCRDSPOS, 0, 1, 0 }, 91 { "retension", MTIOCTOP, MTRETEN, 1, 0 }, 92 { "rewind", MTIOCTOP, MTREW, 1, 0 }, 93 { "rewoffl", MTIOCTOP, MTOFFL, 1, 0 }, 94 { "setblk", MTIOCTOP, MTSETBSIZ, 1, 0 }, 95 { "setdensity", MTIOCTOP, MTSETDNSTY, 1, 0 }, 96 { "sethpos", MTIOCHLOCATE, 0, 1, 0 }, 97 { "setspos", MTIOCSLOCATE, 0, 1, 0 }, 98 { "status", MTIOCGET, MTNOP, 1, 0 }, 99 { "weof", MTIOCTOP, MTWEOF, 0, 1 }, 100 { "eew", MTIOCTOP, MTEWARN, 1, 0 }, 101 { NULL } 102 }; 103 104 void printreg(const char *, u_int, const char *); 105 void status(struct mtget *); 106 void usage(void); 107 int main(int, char *[]); 108 109 int 110 main(int argc, char *argv[]) 111 { 112 const struct commands *comp = (const struct commands *) NULL; 113 struct mtget mt_status; 114 struct mtop mt_com; 115 int ch, len, mtfd, flags; 116 char *p; 117 const char *tape; 118 int count; 119 120 setprogname(argv[0]); 121 if ((tape = getenv("TAPE")) == NULL) 122 tape = _PATH_DEFTAPE; 123 124 while ((ch = getopt(argc, argv, "f:t:")) != -1) 125 switch (ch) { 126 case 'f': 127 case 't': 128 tape = optarg; 129 break; 130 case '?': 131 default: 132 usage(); 133 } 134 argc -= optind; 135 argv += optind; 136 137 if (argc < 1 || argc > 2) 138 usage(); 139 140 len = strlen(p = *argv++); 141 for (comp = com;; comp++) { 142 if (comp->c_name == NULL) 143 errx(1, "%s: unknown command", p); 144 if (strncmp(p, comp->c_name, len) == 0) 145 break; 146 } 147 148 if (*argv) { 149 count = strtol(*argv, &p, 10); 150 if (count < comp->c_mincount || *p) 151 errx(2, "%s: illegal count", *argv); 152 } else 153 count = 1; 154 155 flags = comp->c_ronly ? O_RDONLY : O_WRONLY; 156 157 if ((mtfd = open(tape, flags)) < 0) 158 err(2, "%s", tape); 159 160 switch (comp->c_spcl) { 161 case MTIOCTOP: 162 if (comp->c_code == MTASF) { 163 164 /* If mtget.mt_fileno was implemented, We could 165 compute the minimal seek needed to position 166 the tape. Until then, rewind and seek from 167 begining-of-tape */ 168 169 mt_com.mt_op = MTREW; 170 mt_com.mt_count = 1; 171 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 172 err(2, "%s", tape); 173 174 if (count > 0) { 175 mt_com.mt_op = MTFSF; 176 mt_com.mt_count = count; 177 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 178 err(2, "%s", tape); 179 } 180 181 } else { 182 mt_com.mt_op = comp->c_code; 183 mt_com.mt_count = count; 184 185 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 186 err(2, "%s: %s", tape, comp->c_name); 187 188 } 189 break; 190 191 case MTIOCGET: 192 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 193 err(2, "%s: %s", tape, comp->c_name); 194 status(&mt_status); 195 break; 196 197 case MTIOCRDSPOS: 198 case MTIOCRDHPOS: 199 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) 200 err(2, "%s", tape); 201 printf("%s: block location %u\n", tape, (unsigned int) count); 202 break; 203 204 case MTIOCSLOCATE: 205 case MTIOCHLOCATE: 206 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) 207 err(2, "%s", tape); 208 break; 209 210 default: 211 errx(1, "internal error: unknown request %d", comp->c_spcl); 212 } 213 214 exit(0); 215 /* NOTREACHED */ 216 } 217 218 #if defined(sun) && !defined(__SVR4) 219 #include <sundev/tmreg.h> 220 #include <sundev/arreg.h> 221 #endif 222 223 #ifdef tahoe 224 #include <tahoe/vba/cyreg.h> 225 #endif 226 227 const struct tape_desc { 228 short t_type; /* type of magtape device */ 229 const char *t_name; /* printing name */ 230 const char *t_dsbits; /* "drive status" register */ 231 const char *t_erbits; /* "error" register */ 232 } tapes[] = { 233 #if defined(sun) && !defined(__SVR4) 234 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 235 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 236 #endif 237 #ifdef tahoe 238 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 239 #endif 240 #define SCSI_DS_BITS "\20\5WriteProtect\2Mounted" 241 { 0x7, "SCSI", SCSI_DS_BITS, "76543210" }, 242 { 0 } 243 }; 244 245 246 /* 247 * Interpret the status buffer returned 248 */ 249 void 250 status(struct mtget *bp) 251 { 252 const struct tape_desc *mt; 253 254 for (mt = tapes;; mt++) { 255 if (mt->t_type == 0) { 256 (void)printf("%d: unknown tape drive type\n", 257 bp->mt_type); 258 return; 259 } 260 if (mt->t_type == bp->mt_type) 261 break; 262 } 263 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 264 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 265 printreg("\ner", bp->mt_erreg, mt->t_erbits); 266 (void)putchar('\n'); 267 (void)printf("blocksize: %d (%d, %d, %d, %d)\n", 268 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], 269 bp->mt_mblksiz[2], bp->mt_mblksiz[3]); 270 (void)printf("density: %d (%d, %d, %d, %d)\n", 271 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], 272 bp->mt_mdensity[2], bp->mt_mdensity[3]); 273 (void)printf("current file number: %d\n", bp->mt_fileno); 274 (void)printf("current block number: %d\n", bp->mt_blkno); 275 } 276 277 /* 278 * Print a register a la the %b format of the kernel's printf. 279 */ 280 void 281 printreg(const char *s, u_int v, const char *bits) 282 { 283 int any, i; 284 char c; 285 286 any = 0; 287 if (bits && *bits == 8) 288 printf("%s=%o", s, v); 289 else 290 printf("%s=%x", s, v); 291 bits++; 292 if (v && *bits) { 293 putchar('<'); 294 while ((i = *bits++)) { 295 if (v & (1 << (i-1))) { 296 if (any) 297 putchar(','); 298 any = 1; 299 for (; (c = *bits) > 32; bits++) 300 putchar(c); 301 } else 302 for (; *bits > 32; bits++) 303 ; 304 } 305 putchar('>'); 306 } 307 } 308 309 void 310 usage(void) 311 { 312 (void)fprintf(stderr, "usage: %s [-f device] command [ count ]\n", getprogname()); 313 exit(1); 314 /* NOTREACHED */ 315 } 316