1 /* $NetBSD: mt.c,v 1.36 2001/09/16 21:57:34 wiz 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 1.36 2001/09/16 21:57:34 wiz 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 <rmt.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_spcl; /* ioctl request */ 75 int c_code; /* ioctl code for MTIOCTOP command */ 76 int c_ronly; /* open tape read-only */ 77 int c_mincount; /* min allowed count value */ 78 }; 79 80 const struct commands com[] = { 81 { "asf", MTIOCTOP, MTASF, 1, 0 }, 82 { "blocksize", MTIOCTOP, MTSETBSIZ, 1, 0 }, 83 { "bsf", MTIOCTOP, MTBSF, 1, 1 }, 84 { "bsr", MTIOCTOP, MTBSR, 1, 1 }, 85 { "compress", MTIOCTOP, MTCMPRESS, 1, 0 }, 86 { "density", MTIOCTOP, MTSETDNSTY, 1, 0 }, 87 { "eof", MTIOCTOP, MTWEOF, 0, 1 }, 88 { "eom", MTIOCTOP, MTEOM, 1, 0 }, 89 { "erase", MTIOCTOP, MTERASE, 0, 0 }, 90 { "fsf", MTIOCTOP, MTFSF, 1, 1 }, 91 { "fsr", MTIOCTOP, MTFSR, 1, 1 }, 92 { "offline", MTIOCTOP, MTOFFL, 1, 0 }, 93 { "rdhpos", MTIOCRDHPOS, 0, 1, 0 }, 94 { "rdspos", MTIOCRDSPOS, 0, 1, 0 }, 95 { "retension", MTIOCTOP, MTRETEN, 1, 0 }, 96 { "rewind", MTIOCTOP, MTREW, 1, 0 }, 97 { "rewoffl", MTIOCTOP, MTOFFL, 1, 0 }, 98 { "setblk", MTIOCTOP, MTSETBSIZ, 1, 0 }, 99 { "setdensity", MTIOCTOP, MTSETDNSTY, 1, 0 }, 100 { "sethpos", MTIOCHLOCATE, 0, 1, 0 }, 101 { "setspos", MTIOCSLOCATE, 0, 1, 0 }, 102 { "status", MTIOCGET, MTNOP, 1, 0 }, 103 { "weof", MTIOCTOP, MTWEOF, 0, 1 }, 104 { "eew", MTIOCTOP, MTEWARN, 1, 0 }, 105 { NULL } 106 }; 107 108 void printreg(const char *, u_int, const char *); 109 void status(struct mtget *); 110 void usage(void); 111 int main(int, char *[]); 112 113 int 114 main(int argc, char *argv[]) 115 { 116 const struct commands *comp = (const struct commands *) NULL; 117 struct mtget mt_status; 118 struct mtop mt_com; 119 int ch, len, mtfd, flags; 120 char *p; 121 const char *tape; 122 int count; 123 124 setprogname(argv[0]); 125 if ((tape = getenv("TAPE")) == NULL) 126 tape = _PATH_DEFTAPE; 127 128 while ((ch = getopt(argc, argv, "f:t:")) != -1) 129 switch (ch) { 130 case 'f': 131 case 't': 132 tape = optarg; 133 break; 134 case '?': 135 default: 136 usage(); 137 } 138 argc -= optind; 139 argv += optind; 140 141 if (argc < 1 || argc > 2) 142 usage(); 143 144 len = strlen(p = *argv++); 145 for (comp = com;; comp++) { 146 if (comp->c_name == NULL) 147 errx(1, "%s: unknown command", p); 148 if (strncmp(p, comp->c_name, len) == 0) 149 break; 150 } 151 152 if (*argv) { 153 count = strtol(*argv, &p, 10); 154 if (count < comp->c_mincount || *p) 155 errx(2, "%s: illegal count", *argv); 156 } else 157 count = 1; 158 159 flags = comp->c_ronly ? O_RDONLY : O_WRONLY; 160 161 if ((mtfd = open(tape, flags)) < 0) 162 err(2, "%s", tape); 163 164 switch (comp->c_spcl) { 165 case MTIOCTOP: 166 if (comp->c_code == MTASF) { 167 168 /* If mtget.mt_fileno was implemented, We could 169 compute the minimal seek needed to position 170 the tape. Until then, rewind and seek from 171 begining-of-tape */ 172 173 mt_com.mt_op = MTREW; 174 mt_com.mt_count = 1; 175 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 176 err(2, "%s", tape); 177 178 if (count > 0) { 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 } 184 185 } else { 186 mt_com.mt_op = comp->c_code; 187 mt_com.mt_count = count; 188 189 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 190 err(2, "%s: %s", tape, comp->c_name); 191 192 } 193 break; 194 195 case MTIOCGET: 196 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 197 err(2, "%s: %s", tape, comp->c_name); 198 status(&mt_status); 199 break; 200 201 case MTIOCRDSPOS: 202 case MTIOCRDHPOS: 203 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) 204 err(2, "%s", tape); 205 printf("%s: block location %u\n", tape, (unsigned int) count); 206 break; 207 208 case MTIOCSLOCATE: 209 case MTIOCHLOCATE: 210 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) 211 err(2, "%s", tape); 212 break; 213 214 default: 215 errx(1, "internal error: unknown request %d", comp->c_spcl); 216 } 217 218 exit(0); 219 /* NOTREACHED */ 220 } 221 222 #if defined(sun) && !defined(__SVR4) 223 #include <sundev/tmreg.h> 224 #include <sundev/arreg.h> 225 #endif 226 227 #ifdef tahoe 228 #include <tahoe/vba/cyreg.h> 229 #endif 230 231 const struct tape_desc { 232 short t_type; /* type of magtape device */ 233 const char *t_name; /* printing name */ 234 const char *t_dsbits; /* "drive status" register */ 235 const char *t_erbits; /* "error" register */ 236 } tapes[] = { 237 #if defined(sun) && !defined(__SVR4) 238 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 239 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 240 #endif 241 #ifdef tahoe 242 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 243 #endif 244 #define SCSI_DS_BITS "\20\5WriteProtect\2Mounted" 245 { 0x7, "SCSI", SCSI_DS_BITS, "76543210" }, 246 { 0 } 247 }; 248 249 250 /* 251 * Interpret the status buffer returned 252 */ 253 void 254 status(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(const char *s, u_int v, const char *bits) 286 { 287 int any, i; 288 char c; 289 290 any = 0; 291 if (bits && *bits == 8) 292 printf("%s=%o", s, v); 293 else 294 printf("%s=%x", s, v); 295 bits++; 296 if (v && *bits) { 297 putchar('<'); 298 while ((i = *bits++)) { 299 if (v & (1 << (i-1))) { 300 if (any) 301 putchar(','); 302 any = 1; 303 for (; (c = *bits) > 32; bits++) 304 putchar(c); 305 } else 306 for (; *bits > 32; bits++) 307 ; 308 } 309 putchar('>'); 310 } 311 } 312 313 void 314 usage(void) 315 { 316 (void)fprintf(stderr, "usage: %s [-f device] command [ count ]\n", getprogname()); 317 exit(1); 318 /* NOTREACHED */ 319 } 320