mt.c revision 1.19
1 /* $NetBSD: mt.c,v 1.19 1997/04/15 06:53:51 lukem 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 1.19 1997/04/15 06:53:51 lukem 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; 74 int c_code; 75 int c_ronly; 76 }; 77 78 const struct commands com[] = { 79 { "asf", MTASF, 1 }, 80 { "blocksize", MTSETBSIZ, 1 }, 81 { "bsf", MTBSF, 1 }, 82 { "bsr", MTBSR, 1 }, 83 { "density", MTSETDNSTY, 1 }, 84 { "eof", MTWEOF, 0 }, 85 { "eom", MTEOM, 1 }, 86 { "erase", MTERASE, 0 }, 87 { "fsf", MTFSF, 1 }, 88 { "fsr", MTFSR, 1 }, 89 { "offline", MTOFFL, 1 }, 90 { "rewind", MTREW, 1 }, 91 { "rewoffl", MTOFFL, 1 }, 92 { "status", MTNOP, 1 }, 93 { "retension", MTRETEN, 1 }, 94 { "weof", MTWEOF, 0 }, 95 { NULL } 96 }; 97 98 void printreg __P((char *, u_int, char *)); 99 void status __P((struct mtget *)); 100 void usage __P((void)); 101 102 int 103 main(argc, argv) 104 int argc; 105 char *argv[]; 106 { 107 const struct commands *comp; 108 struct mtget mt_status; 109 struct mtop mt_com; 110 int ch, len, mtfd, flags; 111 char *p, *tape; 112 int count; 113 114 if ((tape = getenv("TAPE")) == NULL) 115 tape = _PATH_DEFTAPE; 116 117 while ((ch = getopt(argc, argv, "f:t:")) != -1) 118 switch (ch) { 119 case 'f': 120 case 't': 121 tape = optarg; 122 break; 123 case '?': 124 default: 125 usage(); 126 } 127 argc -= optind; 128 argv += optind; 129 130 if (argc < 1 || argc > 2) 131 usage(); 132 133 len = strlen(p = *argv++); 134 for (comp = com;; comp++) { 135 if (comp->c_name == NULL) 136 errx(1, "%s: unknown command", p); 137 if (strncmp(p, comp->c_name, len) == 0) 138 break; 139 } 140 141 flags = comp->c_ronly ? O_RDONLY : O_WRONLY; 142 if ((mtfd = open(tape, flags)) < 0) 143 err(2, "%s", tape); 144 145 if (comp->c_code == MTASF) { 146 /* If mtget.mt_fileno was implemented, We could 147 compute the minimal seek needed to position 148 the tape. Until then, rewind and seek from 149 begining-of-tape */ 150 151 /* zero is a valid count */ 152 if (*argv) { 153 count = strtol(*argv, &p, 10); 154 if (count < 0 || *p) 155 errx(2, "%s: illegal count", *argv); 156 } 157 else 158 count = 1; 159 160 mt_com.mt_op = MTREW; 161 mt_com.mt_count = 1; 162 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 163 err(2, "%s", tape); 164 165 mt_com.mt_op = MTFSF; 166 mt_com.mt_count = count; 167 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 168 err(2, "%s", tape); 169 170 } else if (comp->c_code != MTNOP) { 171 172 /* zero is *not* a valid count */ 173 if (*argv) { 174 count = strtol(*argv, &p, 10); 175 if (count <= 0 || *p) 176 errx(2, "%s: illegal count", *argv); 177 } 178 else 179 count = 1; 180 181 mt_com.mt_op = comp->c_code; 182 mt_com.mt_count = count; 183 184 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 185 err(2, "%s: %s", tape, comp->c_name); 186 187 } else { 188 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 189 err(2, "%s: %s", tape, comp->c_name); 190 status(&mt_status); 191 } 192 193 exit(0); 194 /* NOTREACHED */ 195 } 196 197 #ifdef sun 198 #include <sundev/tmreg.h> 199 #include <sundev/arreg.h> 200 #endif 201 202 #ifdef tahoe 203 #include <tahoe/vba/cyreg.h> 204 #endif 205 206 struct tape_desc { 207 short t_type; /* type of magtape device */ 208 char *t_name; /* printing name */ 209 char *t_dsbits; /* "drive status" register */ 210 char *t_erbits; /* "error" register */ 211 } tapes[] = { 212 #ifdef sun 213 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 214 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 215 #endif 216 #ifdef tahoe 217 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 218 #endif 219 { 0x7, "SCSI", "76543210", "76543210" }, 220 { 0 } 221 }; 222 223 /* 224 * Interpret the status buffer returned 225 */ 226 void 227 status(bp) 228 struct mtget *bp; 229 { 230 struct tape_desc *mt; 231 232 for (mt = tapes;; mt++) { 233 if (mt->t_type == 0) { 234 (void)printf("%d: unknown tape drive type\n", 235 bp->mt_type); 236 return; 237 } 238 if (mt->t_type == bp->mt_type) 239 break; 240 } 241 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 242 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 243 printreg("\ner", bp->mt_erreg, mt->t_erbits); 244 (void)putchar('\n'); 245 (void)printf("blocksize: %ld (%ld, %ld, %ld, %ld)\n", 246 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], 247 bp->mt_mblksiz[2], bp->mt_mblksiz[3]); 248 (void)printf("density: %ld (%ld, %ld, %ld, %ld)\n", 249 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], 250 bp->mt_mdensity[2], bp->mt_mdensity[3]); 251 } 252 253 /* 254 * Print a register a la the %b format of the kernel's printf. 255 */ 256 void 257 printreg(s, v, bits) 258 char *s; 259 u_int v; 260 char *bits; 261 { 262 int i, any = 0; 263 char c; 264 265 if (bits && *bits == 8) 266 printf("%s=%o", s, v); 267 else 268 printf("%s=%x", s, v); 269 bits++; 270 if (v && bits) { 271 putchar('<'); 272 while ((i = *bits++)) { 273 if (v & (1 << (i-1))) { 274 if (any) 275 putchar(','); 276 any = 1; 277 for (; (c = *bits) > 32; bits++) 278 putchar(c); 279 } else 280 for (; *bits > 32; bits++) 281 ; 282 } 283 putchar('>'); 284 } 285 } 286 287 void 288 usage() 289 { 290 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 291 exit(1); 292 } 293
Indexes created Thu Sep 25 06:09:39 GMT 2025