mt.c revision 1.1.1.2
1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. 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 static char copyright[] = 36 "@(#) Copyright (c) 1980, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)mt.c 8.2 (Berkeley) 5/4/95"; 42 #endif /* not lint */ 43 44 /* 45 * mt -- 46 * magnetic tape manipulation program 47 */ 48 #include <sys/types.h> 49 #include <sys/ioctl.h> 50 #include <sys/mtio.h> 51 52 #include <ctype.h> 53 #include <errno.h> 54 #include <fcntl.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 struct commands { 61 char *c_name; 62 int c_code; 63 int c_ronly; 64 } com[] = { 65 { "bsf", MTBSF, 1 }, 66 { "bsr", MTBSR, 1 }, 67 { "eof", MTWEOF, 0 }, 68 { "fsf", MTFSF, 1 }, 69 { "fsr", MTFSR, 1 }, 70 { "offline", MTOFFL, 1 }, 71 { "rewind", MTREW, 1 }, 72 { "rewoffl", MTOFFL, 1 }, 73 { "status", MTNOP, 1 }, 74 { "weof", MTWEOF, 0 }, 75 { NULL } 76 }; 77 78 void err __P((const char *, ...)); 79 void printreg __P((char *, u_int, char *)); 80 void status __P((struct mtget *)); 81 void usage __P((void)); 82 83 int 84 main(argc, argv) 85 int argc; 86 char *argv[]; 87 { 88 register struct commands *comp; 89 struct mtget mt_status; 90 struct mtop mt_com; 91 int ch, len, mtfd; 92 char *p, *tape; 93 94 if ((tape = getenv("TAPE")) == NULL) 95 tape = DEFTAPE; 96 97 while ((ch = getopt(argc, argv, "f:t:")) != EOF) 98 switch(ch) { 99 case 'f': 100 case 't': 101 tape = optarg; 102 break; 103 case '?': 104 default: 105 usage(); 106 } 107 argc -= optind; 108 argv += optind; 109 110 if (argc < 1 || argc > 2) 111 usage(); 112 113 len = strlen(p = *argv++); 114 for (comp = com;; comp++) { 115 if (comp->c_name == NULL) 116 err("%s: unknown command", p); 117 if (strncmp(p, comp->c_name, len) == 0) 118 break; 119 } 120 if ((mtfd = open(tape, comp->c_ronly ? O_RDONLY : O_RDWR)) < 0) 121 err("%s: %s", tape, strerror(errno)); 122 if (comp->c_code != MTNOP) { 123 mt_com.mt_op = comp->c_code; 124 if (*argv) { 125 mt_com.mt_count = strtol(*argv, &p, 10); 126 if (mt_com.mt_count <= 0 || *p) 127 err("%s: illegal count", *argv); 128 } 129 else 130 mt_com.mt_count = 1; 131 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 132 err("%s: %s: %s", tape, comp->c_name, strerror(errno)); 133 } else { 134 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 135 err("%s", strerror(errno)); 136 status(&mt_status); 137 } 138 exit (0); 139 /* NOTREACHED */ 140 } 141 142 #ifdef vax 143 #include <vax/mba/mtreg.h> 144 #include <vax/mba/htreg.h> 145 146 #include <vax/uba/utreg.h> 147 #include <vax/uba/tmreg.h> 148 #undef b_repcnt /* argh */ 149 #include <vax/uba/tsreg.h> 150 #endif 151 152 #ifdef sun 153 #include <sundev/tmreg.h> 154 #include <sundev/arreg.h> 155 #endif 156 157 #ifdef tahoe 158 #include <tahoe/vba/cyreg.h> 159 #endif 160 161 struct tape_desc { 162 short t_type; /* type of magtape device */ 163 char *t_name; /* printing name */ 164 char *t_dsbits; /* "drive status" register */ 165 char *t_erbits; /* "error" register */ 166 } tapes[] = { 167 #ifdef vax 168 { MT_ISTS, "ts11", 0, TSXS0_BITS }, 169 { MT_ISHT, "tm03", HTDS_BITS, HTER_BITS }, 170 { MT_ISTM, "tm11", 0, TMER_BITS }, 171 { MT_ISMT, "tu78", MTDS_BITS, 0 }, 172 { MT_ISUT, "tu45", UTDS_BITS, UTER_BITS }, 173 #endif 174 #ifdef sun 175 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 176 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 177 #endif 178 #ifdef tahoe 179 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 180 #endif 181 { 0 } 182 }; 183 184 /* 185 * Interpret the status buffer returned 186 */ 187 void 188 status(bp) 189 register struct mtget *bp; 190 { 191 register struct tape_desc *mt; 192 193 for (mt = tapes;; mt++) { 194 if (mt->t_type == 0) { 195 (void)printf("%d: unknown tape drive type\n", 196 bp->mt_type); 197 return; 198 } 199 if (mt->t_type == bp->mt_type) 200 break; 201 } 202 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 203 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 204 printreg("\ner", bp->mt_erreg, mt->t_erbits); 205 (void)putchar('\n'); 206 } 207 208 /* 209 * Print a register a la the %b format of the kernel's printf. 210 */ 211 void 212 printreg(s, v, bits) 213 char *s; 214 register u_int v; 215 register char *bits; 216 { 217 register int i, any = 0; 218 register char c; 219 220 if (bits && *bits == 8) 221 printf("%s=%o", s, v); 222 else 223 printf("%s=%x", s, v); 224 bits++; 225 if (v && bits) { 226 putchar('<'); 227 while (i = *bits++) { 228 if (v & (1 << (i-1))) { 229 if (any) 230 putchar(','); 231 any = 1; 232 for (; (c = *bits) > 32; bits++) 233 putchar(c); 234 } else 235 for (; *bits > 32; bits++) 236 ; 237 } 238 putchar('>'); 239 } 240 } 241 242 void 243 usage() 244 { 245 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 246 exit(1); 247 } 248 249 #if __STDC__ 250 #include <stdarg.h> 251 #else 252 #include <varargs.h> 253 #endif 254 255 void 256 #if __STDC__ 257 err(const char *fmt, ...) 258 #else 259 err(fmt, va_alist) 260 char *fmt; 261 va_dcl 262 #endif 263 { 264 va_list ap; 265 #if __STDC__ 266 va_start(ap, fmt); 267 #else 268 va_start(ap); 269 #endif 270 (void)fprintf(stderr, "mt: "); 271 (void)vfprintf(stderr, fmt, ap); 272 va_end(ap); 273 (void)fprintf(stderr, "\n"); 274 exit(1); 275 /* NOTREACHED */ 276 } 277
Indexes created Wed Oct 22 13:09:56 GMT 2025