mt.c revision 1.17
1 /* $NetBSD: mt.c,v 1.17 1996/08/09 04:28:43 jtc 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 #ifndef lint 37 static char copyright[] = 38 "@(#) 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 static char rcsid[] = "$NetBSD: mt.c,v 1.17 1996/08/09 04:28:43 jtc 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 <stdio.h> 64 #include <stdlib.h> 65 #include <string.h> 66 #include <unistd.h> 67 68 /* pseudo ioctl constants */ 69 #define MTASF 100 70 71 struct commands { 72 const char *c_name; 73 int c_code; 74 int c_ronly; 75 }; 76 77 const struct commands com[] = { 78 { "asf", MTASF, 1 }, 79 { "blocksize", MTSETBSIZ, 1 }, 80 { "bsf", MTBSF, 1 }, 81 { "bsr", MTBSR, 1 }, 82 { "density", MTSETDNSTY, 1 }, 83 { "eof", MTWEOF, 0 }, 84 { "eom", MTEOM, 1 }, 85 { "erase", MTERASE, 0 }, 86 { "fsf", MTFSF, 1 }, 87 { "fsr", MTFSR, 1 }, 88 { "offline", MTOFFL, 1 }, 89 { "rewind", MTREW, 1 }, 90 { "rewoffl", MTOFFL, 1 }, 91 { "status", MTNOP, 1 }, 92 { "retension", MTRETEN, 1 }, 93 { "weof", MTWEOF, 0 }, 94 { NULL } 95 }; 96 97 void printreg __P((char *, u_int, char *)); 98 void status __P((struct mtget *)); 99 void usage __P((void)); 100 101 int 102 main(argc, argv) 103 int argc; 104 char *argv[]; 105 { 106 register const struct commands *comp; 107 struct mtget mt_status; 108 struct mtop mt_com; 109 int ch, len, mtfd, flags; 110 char *p, *tape; 111 int count; 112 113 if ((tape = getenv("TAPE")) == NULL) 114 tape = DEFTAPE; 115 116 while ((ch = getopt(argc, argv, "f:t:")) != -1) 117 switch (ch) { 118 case 'f': 119 case 't': 120 tape = optarg; 121 break; 122 case '?': 123 default: 124 usage(); 125 } 126 argc -= optind; 127 argv += optind; 128 129 if (argc < 1 || argc > 2) 130 usage(); 131 132 len = strlen(p = *argv++); 133 for (comp = com;; comp++) { 134 if (comp->c_name == NULL) 135 errx(1, "%s: unknown command", p); 136 if (strncmp(p, comp->c_name, len) == 0) 137 break; 138 } 139 140 flags = comp->c_ronly ? O_RDONLY : O_WRONLY; 141 if ((mtfd = open(tape, flags)) < 0) 142 err(2, "%s", tape); 143 144 if (comp->c_code == MTASF) { 145 /* If mtget.mt_fileno was implemented, We could 146 compute the minimal seek needed to position 147 the tape. Until then, rewind and seek from 148 begining-of-tape */ 149 150 /* zero is a valid count */ 151 if (*argv) { 152 count = strtol(*argv, &p, 10); 153 if (count < 0 || *p) 154 errx(2, "%s: illegal count", *argv); 155 } 156 else 157 count = 1; 158 159 mt_com.mt_op = MTREW; 160 mt_com.mt_count = 1; 161 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 162 err(2, "%s", tape); 163 164 mt_com.mt_op = MTFSF; 165 mt_com.mt_count = count; 166 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 167 err(2, "%s", tape); 168 169 } else if (comp->c_code != MTNOP) { 170 171 /* zero is *not* a valid count */ 172 if (*argv) { 173 count = strtol(*argv, &p, 10); 174 if (count <= 0 || *p) 175 errx(2, "%s: illegal count", *argv); 176 } 177 else 178 count = 1; 179 180 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 } else { 187 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 188 err(2, "%s: %s", tape, comp->c_name); 189 status(&mt_status); 190 } 191 192 exit(0); 193 /* NOTREACHED */ 194 } 195 196 #ifdef sun 197 #include <sundev/tmreg.h> 198 #include <sundev/arreg.h> 199 #endif 200 201 #ifdef tahoe 202 #include <tahoe/vba/cyreg.h> 203 #endif 204 205 struct tape_desc { 206 short t_type; /* type of magtape device */ 207 char *t_name; /* printing name */ 208 char *t_dsbits; /* "drive status" register */ 209 char *t_erbits; /* "error" register */ 210 } tapes[] = { 211 #ifdef sun 212 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 213 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 214 #endif 215 #ifdef tahoe 216 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 217 #endif 218 { 0x7, "SCSI", "76543210", "76543210" }, 219 { 0 } 220 }; 221 222 /* 223 * Interpret the status buffer returned 224 */ 225 void 226 status(bp) 227 register struct mtget *bp; 228 { 229 register struct tape_desc *mt; 230 231 for (mt = tapes;; mt++) { 232 if (mt->t_type == 0) { 233 (void)printf("%d: unknown tape drive type\n", 234 bp->mt_type); 235 return; 236 } 237 if (mt->t_type == bp->mt_type) 238 break; 239 } 240 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 241 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 242 printreg("\ner", bp->mt_erreg, mt->t_erbits); 243 (void)putchar('\n'); 244 (void)printf("blocksize: %ld (%ld, %ld, %ld, %ld)\n", 245 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], 246 bp->mt_mblksiz[2], bp->mt_mblksiz[3]); 247 (void)printf("density: %ld (%ld, %ld, %ld, %ld)\n", 248 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], 249 bp->mt_mdensity[2], bp->mt_mdensity[3]); 250 } 251 252 /* 253 * Print a register a la the %b format of the kernel's printf. 254 */ 255 void 256 printreg(s, v, bits) 257 char *s; 258 register u_int v; 259 register char *bits; 260 { 261 register int i, any = 0; 262 register char c; 263 264 if (bits && *bits == 8) 265 printf("%s=%o", s, v); 266 else 267 printf("%s=%x", s, v); 268 bits++; 269 if (v && bits) { 270 putchar('<'); 271 while ((i = *bits++)) { 272 if (v & (1 << (i-1))) { 273 if (any) 274 putchar(','); 275 any = 1; 276 for (; (c = *bits) > 32; bits++) 277 putchar(c); 278 } else 279 for (; *bits > 32; bits++) 280 ; 281 } 282 putchar('>'); 283 } 284 } 285 286 void 287 usage() 288 { 289 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 290 exit(1); 291 } 292
Indexes created Wed Sep 24 05:09:52 GMT 2025