mt.c revision 1.21
1 /* $NetBSD: mt.c,v 1.21 1997/07/20 18:59:32 christos 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 1.21 1997/07/20 18:59:32 christos 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_code; /* ioctl code for this command */ 75 int c_ronly; /* open tape read-only */ 76 int c_mincount; /* min allowed count value */ 77 }; 78 79 const struct commands com[] = { 80 { "asf", MTASF, 1, 1 }, 81 { "blocksize", MTSETBSIZ, 1, 0 }, 82 { "bsf", MTBSF, 1, 1 }, 83 { "bsr", MTBSR, 1, 1 }, 84 { "density", MTSETDNSTY, 1, 0 }, 85 { "eof", MTWEOF, 0, 1 }, 86 { "eom", MTEOM, 1, 0 }, 87 { "erase", MTERASE, 0, 0 }, 88 { "fsf", MTFSF, 1, 1 }, 89 { "fsr", MTFSR, 1, 1 }, 90 { "offline", MTOFFL, 1, 0 }, 91 { "rewind", MTREW, 1, 0 }, 92 { "rewoffl", MTOFFL, 1, 0 }, 93 { "status", MTNOP, 1, 0 }, 94 { "retension", MTRETEN, 1, 0 }, 95 { "weof", MTWEOF, 0, 1 }, 96 { NULL } 97 }; 98 99 void printreg __P((char *, u_int, char *)); 100 void status __P((struct mtget *)); 101 void usage __P((void)); 102 int main __P((int, char *[])); 103 104 int 105 main(argc, argv) 106 int argc; 107 char *argv[]; 108 { 109 const struct commands *comp; 110 struct mtget mt_status; 111 struct mtop mt_com; 112 int ch, len, mtfd, flags; 113 char *p, *tape; 114 int count; 115 116 if ((tape = getenv("TAPE")) == NULL) 117 tape = _PATH_DEFTAPE; 118 119 while ((ch = getopt(argc, argv, "f:t:")) != -1) 120 switch (ch) { 121 case 'f': 122 case 't': 123 tape = optarg; 124 break; 125 case '?': 126 default: 127 usage(); 128 } 129 argc -= optind; 130 argv += optind; 131 132 if (argc < 1 || argc > 2) 133 usage(); 134 135 len = strlen(p = *argv++); 136 for (comp = com;; comp++) { 137 if (comp->c_name == NULL) 138 errx(1, "%s: unknown command", p); 139 if (strncmp(p, comp->c_name, len) == 0) 140 break; 141 } 142 143 if (*argv) { 144 count = strtol(*argv, &p, 10); 145 if (count < comp->c_mincount || *p) 146 errx(2, "%s: illegal count", *argv); 147 } 148 else 149 count = 1; 150 151 flags = comp->c_ronly ? O_RDONLY : O_WRONLY; 152 if ((mtfd = open(tape, flags)) < 0) 153 err(2, "%s", tape); 154 155 if (comp->c_code == MTASF) { 156 /* If mtget.mt_fileno was implemented, We could 157 compute the minimal seek needed to position 158 the tape. Until then, rewind and seek from 159 begining-of-tape */ 160 161 mt_com.mt_op = MTREW; 162 mt_com.mt_count = 1; 163 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 164 err(2, "%s", tape); 165 166 mt_com.mt_op = MTFSF; 167 mt_com.mt_count = count; 168 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 169 err(2, "%s", tape); 170 171 } else if (comp->c_code != MTNOP) { 172 mt_com.mt_op = comp->c_code; 173 mt_com.mt_count = count; 174 175 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 176 err(2, "%s: %s", tape, comp->c_name); 177 178 } else { 179 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 180 err(2, "%s: %s", tape, comp->c_name); 181 status(&mt_status); 182 } 183 184 exit(0); 185 /* NOTREACHED */ 186 } 187 188 #ifdef sun 189 #include <sundev/tmreg.h> 190 #include <sundev/arreg.h> 191 #endif 192 193 #ifdef tahoe 194 #include <tahoe/vba/cyreg.h> 195 #endif 196 197 struct tape_desc { 198 short t_type; /* type of magtape device */ 199 char *t_name; /* printing name */ 200 char *t_dsbits; /* "drive status" register */ 201 char *t_erbits; /* "error" register */ 202 } tapes[] = { 203 #ifdef sun 204 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 205 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 206 #endif 207 #ifdef tahoe 208 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 209 #endif 210 { 0x7, "SCSI", "76543210", "76543210" }, 211 { 0 } 212 }; 213 214 /* 215 * Interpret the status buffer returned 216 */ 217 void 218 status(bp) 219 struct mtget *bp; 220 { 221 struct tape_desc *mt; 222 223 for (mt = tapes;; mt++) { 224 if (mt->t_type == 0) { 225 (void)printf("%d: unknown tape drive type\n", 226 bp->mt_type); 227 return; 228 } 229 if (mt->t_type == bp->mt_type) 230 break; 231 } 232 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 233 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 234 printreg("\ner", bp->mt_erreg, mt->t_erbits); 235 (void)putchar('\n'); 236 (void)printf("blocksize: %d (%d, %d, %d, %d)\n", 237 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], 238 bp->mt_mblksiz[2], bp->mt_mblksiz[3]); 239 (void)printf("density: %d (%d, %d, %d, %d)\n", 240 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], 241 bp->mt_mdensity[2], bp->mt_mdensity[3]); 242 } 243 244 /* 245 * Print a register a la the %b format of the kernel's printf. 246 */ 247 void 248 printreg(s, v, bits) 249 char *s; 250 u_int v; 251 char *bits; 252 { 253 int i, any = 0; 254 char c; 255 256 if (bits && *bits == 8) 257 printf("%s=%o", s, v); 258 else 259 printf("%s=%x", s, v); 260 bits++; 261 if (v && bits) { 262 putchar('<'); 263 while ((i = *bits++)) { 264 if (v & (1 << (i-1))) { 265 if (any) 266 putchar(','); 267 any = 1; 268 for (; (c = *bits) > 32; bits++) 269 putchar(c); 270 } else 271 for (; *bits > 32; bits++) 272 ; 273 } 274 putchar('>'); 275 } 276 } 277 278 void 279 usage() 280 { 281 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 282 exit(1); 283 } 284
Indexes created Wed Sep 24 05:09:52 GMT 2025