mt.c revision 1.24
1 /* $NetBSD: mt.c,v 1.24 1997/10/05 13:07:24 veego 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 1.24 1997/10/05 13:07:24 veego 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_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, 1 }, 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 { "sethpos", MTIOCHLOCATE, 0, 1, 0 }, 99 { "setspos", MTIOCSLOCATE, 0, 1, 0 }, 100 { "status", MTIOCGET, MTNOP, 1, 0 }, 101 { "weof", MTIOCTOP, MTWEOF, 0, 1 }, 102 { NULL } 103 }; 104 105 void printreg __P((char *, u_int, char *)); 106 void status __P((struct mtget *)); 107 void usage __P((void)); 108 int main __P((int, char *[])); 109 110 int 111 main(argc, argv) 112 int argc; 113 char *argv[]; 114 { 115 const struct commands *comp = (const struct commands *) NULL; 116 struct mtget mt_status; 117 struct mtop mt_com; 118 int ch, len, mtfd, flags; 119 char *p, *tape; 120 int count; 121 122 if ((tape = getenv("TAPE")) == NULL) 123 tape = _PATH_DEFTAPE; 124 125 while ((ch = getopt(argc, argv, "f:t:")) != -1) 126 switch (ch) { 127 case 'f': 128 case 't': 129 tape = optarg; 130 break; 131 case '?': 132 default: 133 usage(); 134 } 135 argc -= optind; 136 argv += optind; 137 138 if (argc < 1 || argc > 2) 139 usage(); 140 141 len = strlen(p = *argv++); 142 for (comp = com;; comp++) { 143 if (comp->c_name == NULL) 144 errx(1, "%s: unknown command", p); 145 if (strncmp(p, comp->c_name, len) == 0) 146 break; 147 } 148 149 if (*argv) { 150 count = strtol(*argv, &p, 10); 151 if (count < comp->c_mincount || *p) 152 errx(2, "%s: illegal count", *argv); 153 } else 154 count = 1; 155 156 flags = comp->c_ronly ? O_RDONLY : O_WRONLY; 157 158 if ((mtfd = open(tape, flags)) < 0) 159 err(2, "%s", tape); 160 161 switch (comp->c_spcl) { 162 case MTIOCTOP: 163 if (comp->c_code == MTASF) { 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 mt_com.mt_op = MTFSF; 175 mt_com.mt_count = count; 176 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 177 err(2, "%s", tape); 178 179 } else { 180 mt_com.mt_op = comp->c_code; 181 mt_com.mt_count = count; 182 183 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 184 err(2, "%s: %s", tape, comp->c_name); 185 186 } 187 break; 188 189 case MTIOCGET: 190 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 191 err(2, "%s: %s", tape, comp->c_name); 192 status(&mt_status); 193 break; 194 195 case MTIOCRDSPOS: 196 case MTIOCRDHPOS: 197 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) 198 err(2, "%s", tape); 199 printf("%s: block location %u\n", tape, (unsigned int) count); 200 break; 201 202 case MTIOCSLOCATE: 203 case MTIOCHLOCATE: 204 if (ioctl(mtfd, comp->c_spcl, (caddr_t) &count) < 0) 205 err(2, "%s", tape); 206 break; 207 208 default: 209 errx(1, "internal error: unknown request %d", comp->c_spcl); 210 } 211 212 exit(0); 213 /* NOTREACHED */ 214 } 215 216 #ifdef sun 217 #include <sundev/tmreg.h> 218 #include <sundev/arreg.h> 219 #endif 220 221 #ifdef tahoe 222 #include <tahoe/vba/cyreg.h> 223 #endif 224 225 struct tape_desc { 226 short t_type; /* type of magtape device */ 227 char *t_name; /* printing name */ 228 char *t_dsbits; /* "drive status" register */ 229 char *t_erbits; /* "error" register */ 230 } tapes[] = { 231 #ifdef sun 232 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 233 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 234 #endif 235 #ifdef tahoe 236 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 237 #endif 238 { 0x7, "SCSI", "76543210", "76543210" }, 239 { 0 } 240 }; 241 242 /* 243 * Interpret the status buffer returned 244 */ 245 void 246 status(bp) 247 struct mtget *bp; 248 { 249 struct tape_desc *mt; 250 251 for (mt = tapes;; mt++) { 252 if (mt->t_type == 0) { 253 (void)printf("%d: unknown tape drive type\n", 254 bp->mt_type); 255 return; 256 } 257 if (mt->t_type == bp->mt_type) 258 break; 259 } 260 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 261 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 262 printreg("\ner", bp->mt_erreg, mt->t_erbits); 263 (void)putchar('\n'); 264 (void)printf("blocksize: %d (%d, %d, %d, %d)\n", 265 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], 266 bp->mt_mblksiz[2], bp->mt_mblksiz[3]); 267 (void)printf("density: %d (%d, %d, %d, %d)\n", 268 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], 269 bp->mt_mdensity[2], bp->mt_mdensity[3]); 270 } 271 272 /* 273 * Print a register a la the %b format of the kernel's printf. 274 */ 275 void 276 printreg(s, v, bits) 277 char *s; 278 u_int v; 279 char *bits; 280 { 281 int i, any = 0; 282 char c; 283 284 if (bits && *bits == 8) 285 printf("%s=%o", s, v); 286 else 287 printf("%s=%x", s, v); 288 bits++; 289 if (v && bits) { 290 putchar('<'); 291 while ((i = *bits++)) { 292 if (v & (1 << (i-1))) { 293 if (any) 294 putchar(','); 295 any = 1; 296 for (; (c = *bits) > 32; bits++) 297 putchar(c); 298 } else 299 for (; *bits > 32; bits++) 300 ; 301 } 302 putchar('>'); 303 } 304 } 305 306 void 307 usage() 308 { 309 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 310 exit(1); 311 } 312
Indexes created Wed Sep 24 05:09:52 GMT 2025