mt.c revision 1.15
1 /* $NetBSD: mt.c,v 1.15 1996/05/26 04:00:49 mrg 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 1.15 1996/05/26 04:00:49 mrg 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 struct commands { 70 char *c_name; 71 int c_code; 72 int c_ronly; 73 } com[] = { 74 { "blocksize", MTSETBSIZ, 1 }, 75 { "bsf", MTBSF, 1 }, 76 { "bsr", MTBSR, 1 }, 77 { "density", MTSETDNSTY, 1 }, 78 { "eof", MTWEOF, 0 }, 79 { "eom", MTEOM, 1 }, 80 { "erase", MTERASE, 0 }, 81 { "fsf", MTFSF, 1 }, 82 { "fsr", MTFSR, 1 }, 83 { "offline", MTOFFL, 1 }, 84 { "rewind", MTREW, 1 }, 85 { "rewoffl", MTOFFL, 1 }, 86 { "status", MTNOP, 1 }, 87 { "retension", MTRETEN, 1 }, 88 { "weof", MTWEOF, 0 }, 89 { NULL } 90 }; 91 92 void printreg __P((char *, u_int, char *)); 93 void status __P((struct mtget *)); 94 void usage __P((void)); 95 96 char *host = NULL; /* remote host (if any) */ 97 uid_t uid; /* read uid */ 98 uid_t euid; /* effective uid */ 99 100 int 101 main(argc, argv) 102 int argc; 103 char *argv[]; 104 { 105 register struct commands *comp; 106 struct mtget mt_status; 107 struct mtop mt_com; 108 int ch, len, mtfd, flags; 109 char *p, *tape; 110 111 uid = getuid(); 112 euid = geteuid(); 113 (void) seteuid(uid); 114 115 if ((tape = getenv("TAPE")) == NULL) 116 tape = DEFTAPE; 117 118 while ((ch = getopt(argc, argv, "f:t:")) != -1) 119 switch (ch) { 120 case 'f': 121 case 't': 122 tape = optarg; 123 break; 124 case '?': 125 default: 126 usage(); 127 } 128 argc -= optind; 129 argv += optind; 130 131 if (argc < 1 || argc > 2) 132 usage(); 133 134 if (strchr(tape, ':')) { 135 host = tape; 136 tape = strchr(host, ':'); 137 *tape++ = '\0'; 138 if (rmthost(host) == 0) 139 exit(X_ABORT); 140 } 141 (void) setuid(uid); /* rmthost() is the only reason to be setuid */ 142 143 len = strlen(p = *argv++); 144 for (comp = com;; comp++) { 145 if (comp->c_name == NULL) 146 errx(1, "%s: unknown command", p); 147 if (strncmp(p, comp->c_name, len) == 0) 148 break; 149 } 150 151 flags = comp->c_ronly ? O_RDONLY : O_WRONLY | O_CREAT; 152 if ((mtfd = host ? rmtopen(tape, flags) : open(tape, flags, 153 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) < 0) 154 err(2, "%s", tape); 155 if (comp->c_code != MTNOP) { 156 mt_com.mt_op = comp->c_code; 157 if (*argv) { 158 mt_com.mt_count = strtol(*argv, &p, 10); 159 if (mt_com.mt_count <= 0 || *p) 160 errx(2, "%s: illegal count", *argv); 161 } 162 else 163 mt_com.mt_count = 1; 164 if ((host ? rmtioctl(mt_com.mt_op, mt_com.mt_count) : 165 ioctl(mtfd, MTIOCTOP, &mt_com)) < 0) 166 err(2, "%s: %s", tape, comp->c_name); 167 } else { 168 if (host) 169 status(rmtstatus()); 170 else { 171 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 172 err(2, "ioctl MTIOCGET"); 173 status(&mt_status); 174 } 175 } 176 177 if (host) 178 rmtclose(); 179 180 exit(X_FINOK); 181 /* NOTREACHED */ 182 } 183 184 #ifdef sun 185 #include <sundev/tmreg.h> 186 #include <sundev/arreg.h> 187 #endif 188 189 #ifdef tahoe 190 #include <tahoe/vba/cyreg.h> 191 #endif 192 193 struct tape_desc { 194 short t_type; /* type of magtape device */ 195 char *t_name; /* printing name */ 196 char *t_dsbits; /* "drive status" register */ 197 char *t_erbits; /* "error" register */ 198 } tapes[] = { 199 #ifdef sun 200 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 201 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 202 #endif 203 #ifdef tahoe 204 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 205 #endif 206 { 0x7, "SCSI", "76543210", "76543210" }, 207 { 0 } 208 }; 209 210 /* 211 * Interpret the status buffer returned 212 */ 213 void 214 status(bp) 215 register struct mtget *bp; 216 { 217 register struct tape_desc *mt; 218 219 for (mt = tapes;; mt++) { 220 if (mt->t_type == 0) { 221 (void)printf("%d: unknown tape drive type\n", 222 bp->mt_type); 223 return; 224 } 225 if (mt->t_type == bp->mt_type) 226 break; 227 } 228 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 229 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 230 printreg("\ner", bp->mt_erreg, mt->t_erbits); 231 (void)putchar('\n'); 232 (void)printf("blocksize: %ld (%ld, %ld, %ld, %ld)\n", 233 bp->mt_blksiz, bp->mt_mblksiz[0], bp->mt_mblksiz[1], 234 bp->mt_mblksiz[2], bp->mt_mblksiz[3]); 235 (void)printf("density: %ld (%ld, %ld, %ld, %ld)\n", 236 bp->mt_density, bp->mt_mdensity[0], bp->mt_mdensity[1], 237 bp->mt_mdensity[2], bp->mt_mdensity[3]); 238 } 239 240 /* 241 * Print a register a la the %b format of the kernel's printf. 242 */ 243 void 244 printreg(s, v, bits) 245 char *s; 246 register u_int v; 247 register char *bits; 248 { 249 register int i, any = 0; 250 register char c; 251 252 if (bits && *bits == 8) 253 printf("%s=%o", s, v); 254 else 255 printf("%s=%x", s, v); 256 bits++; 257 if (v && bits) { 258 putchar('<'); 259 while ((i = *bits++)) { 260 if (v & (1 << (i-1))) { 261 if (any) 262 putchar(','); 263 any = 1; 264 for (; (c = *bits) > 32; bits++) 265 putchar(c); 266 } else 267 for (; *bits > 32; bits++) 268 ; 269 } 270 putchar('>'); 271 } 272 } 273 274 void 275 usage() 276 { 277 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 278 exit(X_USAGE); 279 } 280
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