mt.c revision 1.16
1 /* $NetBSD: mt.c,v 1.16 1996/08/08 09:16:08 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 1.16 1996/08/08 09:16:08 jtc Exp $"; 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * mt -- 52 * magnetic tape manipulation program 53 */ 54 #include <sys/types.h> 55 #include <sys/ioctl.h> 56 #include <sys/mtio.h> 57 #include <sys/stat.h> 58 59 #include <ctype.h> 60 #include <err.h> 61 #include <fcntl.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 67 #include "mt.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 /* this is a hack */ 99 #define IOCTL(fd, cmd, arg) (host \ 100 ? rmtioctl(arg) \ 101 : ioctl(fd, cmd, arg)) 102 103 void printreg __P((char *, u_int, char *)); 104 void status __P((struct mtget *)); 105 void usage __P((void)); 106 107 char *host = NULL; /* remote host (if any) */ 108 uid_t uid; /* read uid */ 109 uid_t euid; /* effective uid */ 110 111 int 112 main(argc, argv) 113 int argc; 114 char *argv[]; 115 { 116 register const struct commands *comp; 117 struct mtget mt_status; 118 struct mtop mt_com; 119 int ch, len, mtfd, flags; 120 char *p, *tape; 121 int count; 122 123 uid = getuid(); 124 euid = geteuid(); 125 (void) seteuid(uid); 126 127 if ((tape = getenv("TAPE")) == NULL) 128 tape = DEFTAPE; 129 130 while ((ch = getopt(argc, argv, "f:t:")) != -1) 131 switch (ch) { 132 case 'f': 133 case 't': 134 tape = optarg; 135 break; 136 case '?': 137 default: 138 usage(); 139 } 140 argc -= optind; 141 argv += optind; 142 143 if (argc < 1 || argc > 2) 144 usage(); 145 146 if (strchr(tape, ':')) { 147 host = tape; 148 tape = strchr(host, ':'); 149 *tape++ = '\0'; 150 if (rmthost(host) == 0) 151 exit(X_ABORT); 152 } 153 (void) setuid(uid); /* rmthost() is the only reason to be setuid */ 154 155 len = strlen(p = *argv++); 156 for (comp = com;; comp++) { 157 if (comp->c_name == NULL) 158 errx(1, "%s: unknown command", p); 159 if (strncmp(p, comp->c_name, len) == 0) 160 break; 161 } 162 163 flags = comp->c_ronly ? O_RDONLY : O_WRONLY | O_CREAT; 164 if ((mtfd = host ? rmtopen(tape, flags) : open(tape, flags, 165 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) < 0) 166 err(2, "%s", tape); 167 168 if (comp->c_code == MTASF) { 169 /* If mtget.mt_fileno was implemented, We could 170 compute the minimal seek needed to position 171 the tape. Until then, rewind and seek from 172 begining-of-tape */ 173 174 /* zero is a valid count */ 175 if (*argv) { 176 count = strtol(*argv, &p, 10); 177 if (count < 0 || *p) 178 errx(2, "%s: illegal count", *argv); 179 } 180 else 181 count = 1; 182 183 mt_com.mt_op = MTREW; 184 mt_com.mt_count = 1; 185 if (IOCTL(mtfd, MTIOCTOP, &mt_com) < 0) 186 err(2, "%s", tape); 187 188 mt_com.mt_op = MTFSF; 189 mt_com.mt_count = count; 190 if (IOCTL(mtfd, MTIOCTOP, &mt_com) < 0) 191 err(2, "%s", tape); 192 193 } else if (comp->c_code != MTNOP) { 194 195 /* zero is *not* a valid count */ 196 if (*argv) { 197 count = strtol(*argv, &p, 10); 198 if (count <= 0 || *p) 199 errx(2, "%s: illegal count", *argv); 200 } 201 else 202 count = 1; 203 204 mt_com.mt_op = comp->c_code; 205 mt_com.mt_count = count; 206 207 if (IOCTL(mtfd, MTIOCTOP, &mt_com) < 0) 208 err(2, "%s: %s", tape, comp->c_name); 209 210 } else { 211 212 if (host) 213 status(rmtstatus()); 214 else { 215 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 216 err(2, "ioctl MTIOCGET"); 217 status(&mt_status); 218 } 219 } 220 221 if (host) 222 rmtclose(); 223 224 exit(X_FINOK); 225 /* NOTREACHED */ 226 } 227 228 #ifdef sun 229 #include <sundev/tmreg.h> 230 #include <sundev/arreg.h> 231 #endif 232 233 #ifdef tahoe 234 #include <tahoe/vba/cyreg.h> 235 #endif 236 237 struct tape_desc { 238 short t_type; /* type of magtape device */ 239 char *t_name; /* printing name */ 240 char *t_dsbits; /* "drive status" register */ 241 char *t_erbits; /* "error" register */ 242 } tapes[] = { 243 #ifdef sun 244 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 245 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 246 #endif 247 #ifdef tahoe 248 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 249 #endif 250 { 0x7, "SCSI", "76543210", "76543210" }, 251 { 0 } 252 }; 253 254 /* 255 * Interpret the status buffer returned 256 */ 257 void 258 status(bp) 259 register struct mtget *bp; 260 { 261 register struct tape_desc *mt; 262 263 for (mt = tapes;; mt++) { 264 if (mt->t_type == 0) { 265 (void)printf("%d: unknown tape drive type\n", 266 bp->mt_type); 267 return; 268 } 269 if (mt->t_type == bp->mt_type) 270 break; 271 } 272 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 273 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 274 printreg("\ner", bp->mt_erreg, mt->t_erbits); 275 (void)putchar('\n'); 276 (void)printf("blocksize: %ld (%ld, %ld, %ld, %ld)\n", 277 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], 278 bp->mt_mblksiz[2], bp->mt_mblksiz[3]); 279 (void)printf("density: %ld (%ld, %ld, %ld, %ld)\n", 280 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], 281 bp->mt_mdensity[2], bp->mt_mdensity[3]); 282 } 283 284 /* 285 * Print a register a la the %b format of the kernel's printf. 286 */ 287 void 288 printreg(s, v, bits) 289 char *s; 290 register u_int v; 291 register char *bits; 292 { 293 register int i, any = 0; 294 register char c; 295 296 if (bits && *bits == 8) 297 printf("%s=%o", s, v); 298 else 299 printf("%s=%x", s, v); 300 bits++; 301 if (v && bits) { 302 putchar('<'); 303 while ((i = *bits++)) { 304 if (v & (1 << (i-1))) { 305 if (any) 306 putchar(','); 307 any = 1; 308 for (; (c = *bits) > 32; bits++) 309 putchar(c); 310 } else 311 for (; *bits > 32; bits++) 312 ; 313 } 314 putchar('>'); 315 } 316 } 317 318 void 319 usage() 320 { 321 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 322 exit(X_USAGE); 323 } 324
Indexes created Thu Sep 25 16:09:42 GMT 2025