mt.c revision 1.3
1 /* 2 * Copyright (c) 1980 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 char copyright[] = 36 "@(#) Copyright (c) 1980 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 /*static char sccsid[] = "from: @(#)mt.c 5.6 (Berkeley) 6/6/91";*/ 42 static char rcsid[] = "$Id: mt.c,v 1.3 1994/03/30 01:50:43 jtc Exp $"; 43 #endif /* not lint */ 44 45 /* 46 * mt -- 47 * magnetic tape manipulation program 48 */ 49 #include <sys/types.h> 50 #include <sys/ioctl.h> 51 #include <sys/mtio.h> 52 #include <fcntl.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <ctype.h> 57 #include <err.h> 58 59 static void printreg(); 60 static void status(); 61 static void usage(); 62 63 struct commands { 64 char *c_name; 65 int c_code; 66 int c_ronly; 67 } com[] = { 68 { "weof", MTWEOF, 0 }, 69 { "eof", MTWEOF, 0 }, 70 { "fsf", MTFSF, 1 }, 71 { "bsf", MTBSF, 1 }, 72 { "fsr", MTFSR, 1 }, 73 { "bsr", MTBSR, 1 }, 74 { "rewind", MTREW, 1 }, 75 { "offline", MTOFFL, 1 }, 76 { "rewoffl", MTOFFL, 1 }, 77 { "status", MTNOP, 1 }, 78 { 0 } 79 }; 80 81 int mtfd; 82 struct mtop mt_com; 83 struct mtget mt_status; 84 char *tape = NULL; 85 86 int 87 main(argc, argv) 88 int argc; 89 char **argv; 90 { 91 register char *cp; 92 register struct commands *comp; 93 int c; 94 95 while ((c = getopt(argc, argv, "f:t:")) != -1) { 96 switch (c) { 97 case 'f': 98 case 't': 99 tape = optarg; 100 break; 101 default: 102 usage(); 103 /* NOTREACHED */ 104 } 105 } 106 argc -= optind; 107 argv += optind; 108 109 if (argc < 1 || argc > 2) { 110 usage(); 111 /* NOTREACHED */ 112 } 113 114 cp = argv[0]; 115 for (comp = com; comp->c_name != NULL; comp++) 116 if (strncmp(cp, comp->c_name, strlen(cp)) == 0) 117 break; 118 if (comp->c_name == NULL) { 119 errx(1, "don't grok \"%s\"", cp); 120 /* NOTREACHED */ 121 } 122 123 if (tape == NULL) { 124 if ((tape = getenv("TAPE")) == NULL) 125 tape = DEFTAPE; 126 } 127 128 if ((mtfd = open(tape, comp->c_ronly ? O_RDONLY : O_RDWR)) < 0) { 129 err(1, "%s", tape); 130 /* NOTREACHED */ 131 } 132 if (comp->c_code != MTNOP) { 133 mt_com.mt_op = comp->c_code; 134 mt_com.mt_count = (argc == 2 ? atoi(argv[1]) : 1); 135 if (mt_com.mt_count < 0) { 136 errx(1, "negative repeat count"); 137 /* NOTREACHED */ 138 } 139 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) { 140 err(2, "%s %s %d failed", 141 tape, comp->c_name, mt_com.mt_count); 142 /* NOTREACHED */ 143 } 144 } else { 145 if (ioctl(mtfd, MTIOCGET, (char *)&mt_status) < 0) { 146 err(2, NULL); 147 /* NOTREACHED */ 148 } 149 status(&mt_status); 150 } 151 152 exit(0); 153 } 154 155 #ifdef vax 156 #include <vaxmba/mtreg.h> 157 #include <vaxmba/htreg.h> 158 159 #include <vaxuba/utreg.h> 160 #include <vaxuba/tmreg.h> 161 #undef b_repcnt /* argh */ 162 #include <vaxuba/tsreg.h> 163 #endif 164 165 #ifdef sun 166 #include <sundev/tmreg.h> 167 #include <sundev/arreg.h> 168 #endif 169 170 #ifdef tahoe 171 #include <tahoe/vba/cyreg.h> 172 #endif 173 174 struct tape_desc { 175 short t_type; /* type of magtape device */ 176 char *t_name; /* printing name */ 177 char *t_dsbits; /* "drive status" register */ 178 char *t_erbits; /* "error" register */ 179 } tapes[] = { 180 #ifdef vax 181 { MT_ISTS, "ts11", 0, TSXS0_BITS }, 182 { MT_ISHT, "tm03", HTDS_BITS, HTER_BITS }, 183 { MT_ISTM, "tm11", 0, TMER_BITS }, 184 { MT_ISMT, "tu78", MTDS_BITS, 0 }, 185 { MT_ISUT, "tu45", UTDS_BITS, UTER_BITS }, 186 #endif 187 #ifdef sun 188 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 189 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 190 #endif 191 #ifdef tahoe 192 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 193 #endif 194 { 0 } 195 }; 196 197 /* 198 * Interpret the status buffer returned 199 */ 200 static void 201 status(bp) 202 register struct mtget *bp; 203 { 204 register struct tape_desc *mt; 205 206 for (mt = tapes; mt->t_type; mt++) 207 if (mt->t_type == bp->mt_type) 208 break; 209 if (mt->t_type == 0) { 210 printf("unknown tape drive type (%d)\n", bp->mt_type); 211 return; 212 } 213 printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 214 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 215 printreg("\ner", bp->mt_erreg, mt->t_erbits); 216 putchar('\n'); 217 } 218 219 /* 220 * Print a register a la the %b format of the kernel's printf 221 */ 222 static void 223 printreg(s, v, bits) 224 char *s; 225 register char *bits; 226 register unsigned short v; 227 { 228 register int i, any = 0; 229 register char c; 230 231 if (bits && *bits == 8) 232 printf("%s=%o", s, v); 233 else 234 printf("%s=%x", s, v); 235 bits++; 236 if (v && bits) { 237 putchar('<'); 238 while (i = *bits++) { 239 if (v & (1 << (i-1))) { 240 if (any) 241 putchar(','); 242 any = 1; 243 for (; (c = *bits) > 32; bits++) 244 putchar(c); 245 } else 246 for (; *bits > 32; bits++) 247 ; 248 } 249 putchar('>'); 250 } 251 } 252 253 static void 254 usage() 255 { 256 fprintf(stderr, "usage: mt [ -f device ] command [ count ]\n"); 257 exit(1); 258 } 259
Indexes created Wed Sep 24 05:09:52 GMT 2025