mt.c revision 1.12
1 /* $NetBSD: mt.c,v 1.12 1996/03/28 07:10:05 scottr 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 1.12 1996/03/28 07:10:05 scottr 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 { "bsf", MTBSF, 1 }, 75 { "bsr", MTBSR, 1 }, 76 { "eof", MTWEOF, 0 }, 77 { "eom", MTEOM, 1 }, 78 { "erase", MTERASE, 0 }, 79 { "fsf", MTFSF, 1 }, 80 { "fsr", MTFSR, 1 }, 81 { "offline", MTOFFL, 1 }, 82 { "rewind", MTREW, 1 }, 83 { "rewoffl", MTOFFL, 1 }, 84 { "status", MTNOP, 1 }, 85 { "retension", MTRETEN, 1 }, 86 { "weof", MTWEOF, 0 }, 87 { NULL } 88 }; 89 90 void printreg __P((char *, u_int, char *)); 91 void status __P((struct mtget *)); 92 void usage __P((void)); 93 94 char *host = NULL; /* remote host (if any) */ 95 uid_t uid; /* read uid */ 96 uid_t euid; /* effective uid */ 97 98 int 99 main(argc, argv) 100 int argc; 101 char *argv[]; 102 { 103 register struct commands *comp; 104 struct mtget mt_status; 105 struct mtop mt_com; 106 int ch, len, mtfd, flags; 107 char *p, *tape; 108 109 uid = getuid(); 110 euid = geteuid(); 111 (void) seteuid(uid); 112 113 if ((tape = getenv("TAPE")) == NULL) 114 tape = DEFTAPE; 115 116 while ((ch = getopt(argc, argv, "f:t:")) != -1) 117 switch (ch) { 118 case 'f': 119 case 't': 120 tape = optarg; 121 break; 122 case '?': 123 default: 124 usage(); 125 } 126 argc -= optind; 127 argv += optind; 128 129 if (argc < 1 || argc > 2) 130 usage(); 131 132 if (strchr(tape, ':')) { 133 host = tape; 134 tape = strchr(host, ':'); 135 *tape++ = '\0'; 136 if (rmthost(host) == 0) 137 exit(X_ABORT); 138 } 139 (void) setuid(uid); /* rmthost() is the only reason to be setuid */ 140 141 len = strlen(p = *argv++); 142 for (comp = com;; comp++) { 143 if (comp->c_name == NULL) 144 errx(1, "%s: unknown command", p); 145 if (strncmp(p, comp->c_name, len) == 0) 146 break; 147 } 148 149 flags = comp->c_ronly ? O_RDONLY : O_WRONLY | O_CREAT; 150 if ((mtfd = host ? rmtopen(tape, flags) : open(tape, flags, 151 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) < 0) 152 err(2, "%s", tape); 153 if (comp->c_code != MTNOP) { 154 mt_com.mt_op = comp->c_code; 155 if (*argv) { 156 mt_com.mt_count = strtol(*argv, &p, 10); 157 if (mt_com.mt_count <= 0 || *p) 158 errx(2, "%s: illegal count", *argv); 159 } 160 else 161 mt_com.mt_count = 1; 162 if ((host ? rmtioctl(mt_com.mt_op, mt_com.mt_count) : 163 ioctl(mtfd, MTIOCTOP, &mt_com)) < 0) 164 err(2, "%s: %s", tape, comp->c_name); 165 } else { 166 if (host) 167 status(rmtstatus()); 168 else { 169 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 170 err(2, "ioctl MTIOCGET"); 171 status(&mt_status); 172 } 173 } 174 175 if (host) 176 rmtclose(); 177 178 exit(X_FINOK); 179 /* NOTREACHED */ 180 } 181 182 #ifdef sun 183 #include <sundev/tmreg.h> 184 #include <sundev/arreg.h> 185 #endif 186 187 #ifdef tahoe 188 #include <tahoe/vba/cyreg.h> 189 #endif 190 191 struct tape_desc { 192 short t_type; /* type of magtape device */ 193 char *t_name; /* printing name */ 194 char *t_dsbits; /* "drive status" register */ 195 char *t_erbits; /* "error" register */ 196 } tapes[] = { 197 #ifdef sun 198 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 199 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 200 #endif 201 #ifdef tahoe 202 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 203 #endif 204 { 0 } 205 }; 206 207 /* 208 * Interpret the status buffer returned 209 */ 210 void 211 status(bp) 212 register struct mtget *bp; 213 { 214 register struct tape_desc *mt; 215 216 for (mt = tapes;; mt++) { 217 if (mt->t_type == 0) { 218 (void)printf("%d: unknown tape drive type\n", 219 bp->mt_type); 220 return; 221 } 222 if (mt->t_type == bp->mt_type) 223 break; 224 } 225 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 226 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 227 printreg("\ner", bp->mt_erreg, mt->t_erbits); 228 (void)putchar('\n'); 229 } 230 231 /* 232 * Print a register a la the %b format of the kernel's printf. 233 */ 234 void 235 printreg(s, v, bits) 236 char *s; 237 register u_int v; 238 register char *bits; 239 { 240 register int i, any = 0; 241 register char c; 242 243 if (bits && *bits == 8) 244 printf("%s=%o", s, v); 245 else 246 printf("%s=%x", s, v); 247 bits++; 248 if (v && bits) { 249 putchar('<'); 250 while ((i = *bits++)) { 251 if (v & (1 << (i-1))) { 252 if (any) 253 putchar(','); 254 any = 1; 255 for (; (c = *bits) > 32; bits++) 256 putchar(c); 257 } else 258 for (; *bits > 32; bits++) 259 ; 260 } 261 putchar('>'); 262 } 263 } 264 265 void 266 usage() 267 { 268 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 269 exit(X_USAGE); 270 } 271
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