mt.c revision 1.11
1 /* $NetBSD: mt.c,v 1.11 1996/03/06 06:34:20 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 1.11 1996/03/06 06:34:20 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 <fcntl.h> 58 #include <err.h> 59 #include <stdlib.h> 60 #include <stdio.h> 61 #include <ctype.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "mt.h" 66 67 struct commands { 68 char *c_name; 69 int c_code; 70 int c_ronly; 71 } com[] = { 72 { "bsf", MTBSF, 1 }, 73 { "bsr", MTBSR, 1 }, 74 { "eof", MTWEOF, 0 }, 75 { "eom", MTEOM, 1 }, 76 { "erase", MTERASE, 0 }, 77 { "fsf", MTFSF, 1 }, 78 { "fsr", MTFSR, 1 }, 79 { "offline", MTOFFL, 1 }, 80 { "rewind", MTREW, 1 }, 81 { "rewoffl", MTOFFL, 1 }, 82 { "status", MTNOP, 1 }, 83 { "retension", MTRETEN, 1 }, 84 { "weof", MTWEOF, 0 }, 85 { NULL } 86 }; 87 88 void printreg __P((char *, u_int, char *)); 89 void status __P((struct mtget *)); 90 void usage __P((void)); 91 92 char *host = NULL; /* remote host (if any) */ 93 uid_t uid; /* read uid */ 94 uid_t euid; /* effective uid */ 95 96 int 97 main(argc, argv) 98 int argc; 99 char *argv[]; 100 { 101 register struct commands *comp; 102 struct mtget mt_status; 103 struct mtop mt_com; 104 int ch, len, mtfd; 105 char *p, *tape; 106 107 uid = getuid(); 108 euid = geteuid(); 109 (void) seteuid(uid); 110 111 if ((tape = getenv("TAPE")) == NULL) 112 tape = DEFTAPE; 113 114 while ((ch = getopt(argc, argv, "f:t:")) != -1) 115 switch (ch) { 116 case 'f': 117 case 't': 118 tape = optarg; 119 break; 120 case '?': 121 default: 122 usage(); 123 } 124 argc -= optind; 125 argv += optind; 126 127 if (argc < 1 || argc > 2) 128 usage(); 129 130 if (strchr(tape, ':')) { 131 host = tape; 132 tape = strchr(host, ':'); 133 *tape++ = '\0'; 134 if (rmthost(host) == 0) 135 exit(X_ABORT); 136 } 137 (void) setuid(uid); /* rmthost() is the only reason to be setuid */ 138 139 len = strlen(p = *argv++); 140 for (comp = com;; comp++) { 141 if (comp->c_name == NULL) 142 errx(1, "%s: unknown command", p); 143 if (strncmp(p, comp->c_name, len) == 0) 144 break; 145 } 146 if ((mtfd = host ? rmtopen(tape, 2) : 147 open(tape, O_WRONLY|O_CREAT, 0666)) < 0) 148 err(2, "%s", tape); 149 if (comp->c_code != MTNOP) { 150 mt_com.mt_op = comp->c_code; 151 if (*argv) { 152 mt_com.mt_count = strtol(*argv, &p, 10); 153 if (mt_com.mt_count <= 0 || *p) 154 errx(2, "%s: illegal count", *argv); 155 } 156 else 157 mt_com.mt_count = 1; 158 if ((host ? rmtioctl(mt_com.mt_op, mt_com.mt_count) : 159 ioctl(mtfd, MTIOCTOP, &mt_com)) < 0) 160 err(2, "%s: %s", tape, comp->c_name); 161 } else { 162 if (host) { 163 status(rmtstatus()); 164 } else { 165 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 166 err(2, "ioctl MTIOCGET"); 167 status(&mt_status); 168 } 169 } 170 171 if (host) 172 rmtclose(); 173 174 exit(X_FINOK); 175 /* NOTREACHED */ 176 } 177 178 #ifdef sun 179 #include <sundev/tmreg.h> 180 #include <sundev/arreg.h> 181 #endif 182 183 #ifdef tahoe 184 #include <tahoe/vba/cyreg.h> 185 #endif 186 187 struct tape_desc { 188 short t_type; /* type of magtape device */ 189 char *t_name; /* printing name */ 190 char *t_dsbits; /* "drive status" register */ 191 char *t_erbits; /* "error" register */ 192 } tapes[] = { 193 #ifdef sun 194 { MT_ISCPC, "TapeMaster", TMS_BITS, 0 }, 195 { MT_ISAR, "Archive", ARCH_CTRL_BITS, ARCH_BITS }, 196 #endif 197 #ifdef tahoe 198 { MT_ISCY, "cipher", CYS_BITS, CYCW_BITS }, 199 #endif 200 { 0 } 201 }; 202 203 /* 204 * Interpret the status buffer returned 205 */ 206 void 207 status(bp) 208 register struct mtget *bp; 209 { 210 register struct tape_desc *mt; 211 212 for (mt = tapes;; mt++) { 213 if (mt->t_type == 0) { 214 (void)printf("%d: unknown tape drive type\n", 215 bp->mt_type); 216 return; 217 } 218 if (mt->t_type == bp->mt_type) 219 break; 220 } 221 (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid); 222 printreg("ds", bp->mt_dsreg, mt->t_dsbits); 223 printreg("\ner", bp->mt_erreg, mt->t_erbits); 224 (void)putchar('\n'); 225 } 226 227 /* 228 * Print a register a la the %b format of the kernel's printf. 229 */ 230 void 231 printreg(s, v, bits) 232 char *s; 233 register u_int v; 234 register char *bits; 235 { 236 register int i, any = 0; 237 register char c; 238 239 if (bits && *bits == 8) 240 printf("%s=%o", s, v); 241 else 242 printf("%s=%x", s, v); 243 bits++; 244 if (v && bits) { 245 putchar('<'); 246 while ((i = *bits++)) { 247 if (v & (1 << (i-1))) { 248 if (any) 249 putchar(','); 250 any = 1; 251 for (; (c = *bits) > 32; bits++) 252 putchar(c); 253 } else 254 for (; *bits > 32; bits++) 255 ; 256 } 257 putchar('>'); 258 } 259 } 260 261 void 262 usage() 263 { 264 (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n"); 265 exit(X_USAGE); 266 } 267
Indexes created Wed Sep 24 15:09:51 GMT 2025