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 const 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 #if 0 42 static char sccsid[] = "@(#)mt.c 8.2 (Berkeley) 5/4/95"; 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 /* 50 * mt -- 51 * magnetic tape manipulation program 52 */ 53 #include <sys/types.h> 54 #include <sys/ioctl.h> 55 #include <sys/mtio.h> 56 57 #include <ctype.h> 58 #include <err.h> 59 #include <fcntl.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 /* the appropriate sections of <sys/mtio.h> are also #ifdef'd for FreeBSD */ 66 /* c_flags */ 67 #define NEED_2ARGS 0x01 68 #define ZERO_ALLOWED 0x02 69 #define IS_DENSITY 0x04 70 #define DISABLE_THIS 0x08 71 #define IS_COMP 0x10 72 73 #ifndef TRUE 74 #define TRUE 1 75 #endif 76 #ifndef FALSE 77 #define FALSE 0 78 #endif 79 80 struct commands { 81 const char *c_name; 82 int c_code; 83 int c_ronly; 84 int c_flags; 85 } com[] = { 86 { "bsf", MTBSF, 1, 0 }, 87 { "bsr", MTBSR, 1, 0 }, 88 /* XXX FreeBSD considered "eof" dangerous, since it's being 89 confused with "eom" (and is an alias for "weof" anyway) */ 90 { "eof", MTWEOF, 0, DISABLE_THIS }, 91 { "fsf", MTFSF, 1, 0 }, 92 { "fsr", MTFSR, 1, 0 }, 93 { "offline", MTOFFL, 1, 0 }, 94 { "rewind", MTREW, 1, 0 }, 95 { "rewoffl", MTOFFL, 1, 0 }, 96 { "status", MTNOP, 1, 0 }, 97 { "weof", MTWEOF, 0, ZERO_ALLOWED }, 98 { "erase", MTERASE, 0, ZERO_ALLOWED}, 99 { "blocksize", MTSETBSIZ, 0, NEED_2ARGS|ZERO_ALLOWED }, 100 { "density", MTSETDNSTY, 0, NEED_2ARGS|ZERO_ALLOWED|IS_DENSITY }, 101 { "eom", MTEOD, 1, 0 }, 102 { "eod", MTEOD, 1, 0 }, 103 { "smk", MTWSS, 0, 0 }, 104 { "wss", MTWSS, 0, 0 }, 105 { "fss", MTFSS, 1, 0 }, 106 { "bss", MTBSS, 1, 0 }, 107 { "comp", MTCOMP, 0, NEED_2ARGS|ZERO_ALLOWED|IS_COMP }, 108 { "retension", MTRETENS, 1, 0 }, 109 { "rdhpos", MTIOCRDHPOS, 0, 0 }, 110 { "rdspos", MTIOCRDSPOS, 0, 0 }, 111 { "sethpos", MTIOCHLOCATE, 0, NEED_2ARGS|ZERO_ALLOWED }, 112 { "setspos", MTIOCSLOCATE, 0, NEED_2ARGS|ZERO_ALLOWED }, 113 { "errstat", MTIOCERRSTAT, 0, 0 }, 114 { "setmodel", MTIOCSETEOTMODEL, 0, NEED_2ARGS|ZERO_ALLOWED }, 115 { "seteotmodel", MTIOCSETEOTMODEL, 0, NEED_2ARGS|ZERO_ALLOWED }, 116 { "getmodel", MTIOCGETEOTMODEL, 0, 0 }, 117 { "geteotmodel", MTIOCGETEOTMODEL, 0, 0 }, 118 { NULL, 0, 0, 0 } 119 }; 120 121 const char *getblksiz(int); 122 void printreg(const char *, u_int, const char *); 123 void status(struct mtget *); 124 void usage(void); 125 void st_status (struct mtget *); 126 int stringtodens (const char *s); 127 const char *denstostring (int d); 128 int denstobp(int d, int bpi); 129 u_int32_t stringtocomp(const char *s); 130 const char *comptostring(u_int32_t comp); 131 void warn_eof(void); 132 133 int 134 main(int argc, char *argv[]) 135 { 136 struct commands *comp; 137 struct mtget mt_status; 138 struct mtop mt_com; 139 int ch, len, mtfd; 140 const char *p, *tape; 141 142 if ((tape = getenv("TAPE")) == NULL) 143 tape = DEFTAPE; 144 145 while ((ch = getopt(argc, argv, "f:t:")) != -1) 146 switch(ch) { 147 case 'f': 148 case 't': 149 tape = optarg; 150 break; 151 case '?': 152 default: 153 usage(); 154 } 155 argc -= optind; 156 argv += optind; 157 158 if (argc < 1 || argc > 2) 159 usage(); 160 161 len = strlen(p = *argv++); 162 for (comp = com;; comp++) { 163 if (comp->c_name == NULL) 164 errx(1, "%s: unknown command", p); 165 if (strncmp(p, comp->c_name, len) == 0) 166 break; 167 } 168 if((comp->c_flags & NEED_2ARGS) && argc != 2) 169 usage(); 170 if(comp->c_flags & DISABLE_THIS) { 171 warn_eof(); 172 } 173 if ((mtfd = open(tape, comp->c_ronly ? O_RDONLY : O_RDWR)) < 0) 174 err(1, "%s", tape); 175 if (comp->c_code != MTNOP) { 176 mt_com.mt_op = comp->c_code; 177 if (*argv) { 178 if (!isdigit(**argv) && 179 (comp->c_flags & IS_DENSITY)) { 180 const char *dcanon; 181 mt_com.mt_count = stringtodens(*argv); 182 if (mt_com.mt_count == 0) 183 errx(1, "%s: unknown density", *argv); 184 dcanon = denstostring(mt_com.mt_count); 185 if (strcmp(dcanon, *argv) != 0) 186 printf( 187 "Using \"%s\" as an alias for %s\n", 188 *argv, dcanon); 189 p = ""; 190 } else if (!isdigit(**argv) && 191 (comp->c_flags & IS_COMP)) { 192 193 mt_com.mt_count = stringtocomp(*argv); 194 if ((u_int32_t)mt_com.mt_count == 0xf0f0f0f0) 195 errx(1, "%s: unknown compression", 196 *argv); 197 p = ""; 198 } else { 199 char *q; 200 /* allow for hex numbers; useful for density */ 201 mt_com.mt_count = strtol(*argv, &q, 0); 202 p = q; 203 } 204 if ((mt_com.mt_count <= 205 ((comp->c_flags & ZERO_ALLOWED)? -1: 0) 206 && ((comp->c_flags & IS_COMP) == 0) 207 ) || *p) 208 errx(1, "%s: illegal count", *argv); 209 } 210 else 211 mt_com.mt_count = 1; 212 switch (comp->c_code) { 213 case MTIOCERRSTAT: 214 { 215 unsigned int i; 216 union mterrstat umn; 217 struct scsi_tape_errors *s = &umn.scsi_errstat; 218 219 if (ioctl(mtfd, comp->c_code, (caddr_t)&umn) < 0) 220 err(2, "%s", tape); 221 (void)printf("Last I/O Residual: %u\n", s->io_resid); 222 (void)printf(" Last I/O Command:"); 223 for (i = 0; i < sizeof (s->io_cdb); i++) 224 (void)printf(" %02X", s->io_cdb[i]); 225 (void)printf("\n"); 226 (void)printf(" Last I/O Sense:\n\n\t"); 227 for (i = 0; i < sizeof (s->io_sense); i++) { 228 (void)printf(" %02X", s->io_sense[i]); 229 if (((i + 1) & 0xf) == 0) { 230 (void)printf("\n\t"); 231 } 232 } 233 (void)printf("\n"); 234 (void)printf("Last Control Residual: %u\n", 235 s->ctl_resid); 236 (void)printf(" Last Control Command:"); 237 for (i = 0; i < sizeof (s->ctl_cdb); i++) 238 (void)printf(" %02X", s->ctl_cdb[i]); 239 (void)printf("\n"); 240 (void)printf(" Last Control Sense:\n\n\t"); 241 for (i = 0; i < sizeof (s->ctl_sense); i++) { 242 (void)printf(" %02X", s->ctl_sense[i]); 243 if (((i + 1) & 0xf) == 0) { 244 (void)printf("\n\t"); 245 } 246 } 247 (void)printf("\n\n"); 248 exit(0); 249 /* NOTREACHED */ 250 } 251 case MTIOCRDHPOS: 252 case MTIOCRDSPOS: 253 { 254 u_int32_t block; 255 if (ioctl(mtfd, comp->c_code, (caddr_t)&block) < 0) 256 err(2, "%s", tape); 257 (void)printf("%s: %s block location %u\n", tape, 258 (comp->c_code == MTIOCRDHPOS)? "hardware" : 259 "logical", block); 260 exit(0); 261 /* NOTREACHED */ 262 } 263 case MTIOCSLOCATE: 264 case MTIOCHLOCATE: 265 { 266 u_int32_t block = (u_int32_t)mt_com.mt_count; 267 if (ioctl(mtfd, comp->c_code, (caddr_t)&block) < 0) 268 err(2, "%s", tape); 269 exit(0); 270 /* NOTREACHED */ 271 } 272 case MTIOCGETEOTMODEL: 273 { 274 u_int32_t om; 275 if (ioctl(mtfd, MTIOCGETEOTMODEL, (caddr_t)&om) < 0) 276 err(2, "%s", tape); 277 (void)printf("%s: the model is %u filemar%s at EOT\n", 278 tape, om, (om > 1)? "ks" : "k"); 279 exit(0); 280 /* NOTREACHED */ 281 } 282 case MTIOCSETEOTMODEL: 283 { 284 u_int32_t om, nm = (u_int32_t)mt_com.mt_count; 285 if (ioctl(mtfd, MTIOCGETEOTMODEL, (caddr_t)&om) < 0) 286 err(2, "%s", tape); 287 if (ioctl(mtfd, comp->c_code, (caddr_t)&nm) < 0) 288 err(2, "%s", tape); 289 (void)printf("%s: old model was %u filemar%s at EOT\n", 290 tape, om, (om > 1)? "ks" : "k"); 291 (void)printf("%s: new model is %u filemar%s at EOT\n", 292 tape, nm, (nm > 1)? "ks" : "k"); 293 exit(0); 294 /* NOTREACHED */ 295 } 296 default: 297 break; 298 } 299 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 300 err(1, "%s: %s", tape, comp->c_name); 301 } else { 302 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 303 err(1, NULL); 304 status(&mt_status); 305 } 306 exit(0); 307 /* NOTREACHED */ 308 } 309 310 struct tape_desc { 311 short t_type; /* type of magtape device */ 312 const char *t_name; /* printing name */ 313 const char *t_dsbits; /* "drive status" register */ 314 const char *t_erbits; /* "error" register */ 315 } tapes[] = { 316 { MT_ISAR, "SCSI tape drive", 0, 0 }, 317 { 0, NULL, 0, 0 } 318 }; 319 320 /* 321 * Interpret the status buffer returned 322 */ 323 void 324 status(struct mtget *bp) 325 { 326 struct tape_desc *mt; 327 328 for (mt = tapes;; mt++) { 329 if (mt->t_type == 0) { 330 (void)printf("%d: unknown tape drive type\n", 331 bp->mt_type); 332 return; 333 } 334 if (mt->t_type == bp->mt_type) 335 break; 336 } 337 if(mt->t_type == MT_ISAR) 338 st_status(bp); 339 else { 340 (void)printf("%s tape drive, residual=%d\n", 341 mt->t_name, bp->mt_resid); 342 printreg("ds", (unsigned short)bp->mt_dsreg, mt->t_dsbits); 343 printreg("\ner", (unsigned short)bp->mt_erreg, mt->t_erbits); 344 (void)putchar('\n'); 345 } 346 } 347 348 /* 349 * Print a register a la the %b format of the kernel's printf. 350 */ 351 void 352 printreg(const char *s, u_int v, const char *bits) 353 { 354 int i, any = 0; 355 char c; 356 357 if (bits && *bits == 8) 358 printf("%s=%o", s, v); 359 else 360 printf("%s=%x", s, v); 361 if (!bits) 362 return; 363 bits++; 364 if (v && bits) { 365 putchar('<'); 366 while ((i = *bits++)) { 367 if (v & (1 << (i-1))) { 368 if (any) 369 putchar(','); 370 any = 1; 371 for (; (c = *bits) > 32; bits++) 372 putchar(c); 373 } else 374 for (; *bits > 32; bits++) 375 ; 376 } 377 putchar('>'); 378 } 379 } 380 381 void 382 usage(void) 383 { 384 (void)fprintf(stderr, "usage: mt [-f device] command [count]\n"); 385 exit(1); 386 } 387 388 struct densities { 389 int dens; 390 int bpmm; 391 int bpi; 392 const char *name; 393 } dens[] = { 394 /* 395 * Taken from T10 Project 997D 396 * SCSI-3 Stream Device Commands (SSC) 397 * Revision 11, 4-Nov-97 398 */ 399 /*Num. bpmm bpi Reference */ 400 { 0x1, 32, 800, "X3.22-1983" }, 401 { 0x2, 63, 1600, "X3.39-1986" }, 402 { 0x3, 246, 6250, "X3.54-1986" }, 403 { 0x5, 315, 8000, "X3.136-1986" }, 404 { 0x6, 126, 3200, "X3.157-1987" }, 405 { 0x7, 252, 6400, "X3.116-1986" }, 406 { 0x8, 315, 8000, "X3.158-1987" }, 407 { 0x9, 491, 37871, "X3.180" }, 408 { 0xA, 262, 6667, "X3B5/86-199" }, 409 { 0xB, 63, 1600, "X3.56-1986" }, 410 { 0xC, 500, 12690, "HI-TC1" }, 411 { 0xD, 999, 25380, "HI-TC2" }, 412 { 0xF, 394, 10000, "QIC-120" }, 413 { 0x10, 394, 10000, "QIC-150" }, 414 { 0x11, 630, 16000, "QIC-320" }, 415 { 0x12, 2034, 51667, "QIC-1350" }, 416 { 0x13, 2400, 61000, "X3B5/88-185A" }, 417 { 0x14, 1703, 43245, "X3.202-1991" }, 418 { 0x15, 1789, 45434, "ECMA TC17" }, 419 { 0x16, 394, 10000, "X3.193-1990" }, 420 { 0x17, 1673, 42500, "X3B5/91-174" }, 421 { 0x18, 1673, 42500, "X3B5/92-50" }, 422 { 0x19, 2460, 62500, "DLTapeIII" }, 423 { 0x1A, 3214, 81633, "DLTapeIV(20GB)" }, 424 { 0x1B, 3383, 85937, "DLTapeIV(35GB)" }, 425 { 0x1C, 1654, 42000, "QIC-385M" }, 426 { 0x1D, 1512, 38400, "QIC-410M" }, 427 { 0x1E, 1385, 36000, "QIC-1000C" }, 428 { 0x1F, 2666, 67733, "QIC-2100C" }, 429 { 0x20, 2666, 67733, "QIC-6GB(M)" }, 430 { 0x21, 2666, 67733, "QIC-20GB(C)" }, 431 { 0x22, 1600, 40640, "QIC-2GB(C)" }, 432 { 0x23, 2666, 67733, "QIC-875M" }, 433 { 0x24, 2400, 61000, "DDS-2" }, 434 { 0x25, 3816, 97000, "DDS-3" }, 435 { 0x26, 3816, 97000, "DDS-4" }, 436 { 0x27, 3056, 77611, "Mammoth" }, 437 { 0x28, 1491, 37871, "X3.224" }, 438 { 0x41, 3868, 98250, "DLTapeIV(40GB)" }, 439 { 0x48, 5236, 133000, "SDLTapeI(110)" }, 440 { 0x49, 7598, 193000, "SDLTapeI(160)" }, 441 { 0, 0, 0, NULL } 442 }; 443 444 struct compression_types { 445 u_int32_t comp_number; 446 const char *name; 447 } comp_types[] = { 448 { 0x00, "none" }, 449 { 0x00, "off" }, 450 { 0x10, "IDRC" }, 451 { 0x20, "DCLZ" }, 452 { 0xffffffff, "enable" }, 453 { 0xffffffff, "on" }, 454 { 0xf0f0f0f0, NULL} 455 }; 456 457 const char * 458 denstostring(int d) 459 { 460 static char buf[20]; 461 struct densities *sd; 462 463 /* densities 0 and 0x7f are handled as special cases */ 464 if (d == 0) 465 return "default"; 466 if (d == 0x7f) 467 return "same"; 468 for (sd = dens; sd->dens; sd++) 469 if (sd->dens == d) 470 break; 471 if (sd->dens == 0) 472 sprintf(buf, "0x%02x", d); 473 else 474 sprintf(buf, "0x%02x:%s", d, sd->name); 475 return buf; 476 } 477 478 /* 479 * Given a specific density number, return either the bits per inch or bits 480 * per millimeter for the given density. 481 */ 482 int 483 denstobp(int d, int bpi) 484 { 485 struct densities *sd; 486 487 for (sd = dens; sd->dens; sd++) 488 if (sd->dens == d) 489 break; 490 if (sd->dens == 0) 491 return(0); 492 else { 493 if (bpi) 494 return(sd->bpi); 495 else 496 return(sd->bpmm); 497 } 498 } 499 500 int 501 stringtodens(const char *s) 502 { 503 struct densities *sd; 504 size_t l = strlen(s); 505 506 for (sd = dens; sd->dens; sd++) 507 if (strncasecmp(sd->name, s, l) == 0) 508 break; 509 return sd->dens; 510 } 511 512 513 const char * 514 getblksiz(int bs) 515 { 516 static char buf[25]; 517 if (bs == 0) 518 return "variable"; 519 else { 520 sprintf(buf, "%d bytes", bs); 521 return buf; 522 } 523 } 524 525 const char * 526 comptostring(u_int32_t comp) 527 { 528 static char buf[20]; 529 struct compression_types *ct; 530 531 if (comp == MT_COMP_DISABLED) 532 return "disabled"; 533 else if (comp == MT_COMP_UNSUPP) 534 return "unsupported"; 535 536 for (ct = comp_types; ct->name; ct++) 537 if (ct->comp_number == comp) 538 break; 539 540 if (ct->comp_number == 0xf0f0f0f0) { 541 sprintf(buf, "0x%x", comp); 542 return(buf); 543 } else 544 return(ct->name); 545 } 546 547 u_int32_t 548 stringtocomp(const char *s) 549 { 550 struct compression_types *ct; 551 size_t l = strlen(s); 552 553 for (ct = comp_types; ct->name; ct++) 554 if (strncasecmp(ct->name, s, l) == 0) 555 break; 556 557 return(ct->comp_number); 558 } 559 560 void 561 st_status(struct mtget *bp) 562 { 563 printf("Mode Density Blocksize bpi " 564 "Compression\n" 565 "Current: %-17s %-12s %-7d %s\n" 566 "---------available modes---------\n" 567 "0: %-17s %-12s %-7d %s\n" 568 "1: %-17s %-12s %-7d %s\n" 569 "2: %-17s %-12s %-7d %s\n" 570 "3: %-17s %-12s %-7d %s\n", 571 denstostring(bp->mt_density), getblksiz(bp->mt_blksiz), 572 denstobp(bp->mt_density, TRUE), comptostring(bp->mt_comp), 573 denstostring(bp->mt_density0), getblksiz(bp->mt_blksiz0), 574 denstobp(bp->mt_density0, TRUE), comptostring(bp->mt_comp0), 575 denstostring(bp->mt_density1), getblksiz(bp->mt_blksiz1), 576 denstobp(bp->mt_density1, TRUE), comptostring(bp->mt_comp1), 577 denstostring(bp->mt_density2), getblksiz(bp->mt_blksiz2), 578 denstobp(bp->mt_density2, TRUE), comptostring(bp->mt_comp2), 579 denstostring(bp->mt_density3), getblksiz(bp->mt_blksiz3), 580 denstobp(bp->mt_density3, TRUE), comptostring(bp->mt_comp3)); 581 582 if (bp->mt_dsreg != MTIO_DSREG_NIL) { 583 auto char foo[32]; 584 const char sfmt[] = "Current Driver State: %s.\n"; 585 printf("---------------------------------\n"); 586 switch (bp->mt_dsreg) { 587 case MTIO_DSREG_REST: 588 printf(sfmt, "at rest"); 589 break; 590 case MTIO_DSREG_RBSY: 591 printf(sfmt, "Communicating with drive"); 592 break; 593 case MTIO_DSREG_WR: 594 printf(sfmt, "Writing"); 595 break; 596 case MTIO_DSREG_FMK: 597 printf(sfmt, "Writing Filemarks"); 598 break; 599 case MTIO_DSREG_ZER: 600 printf(sfmt, "Erasing"); 601 break; 602 case MTIO_DSREG_RD: 603 printf(sfmt, "Reading"); 604 break; 605 case MTIO_DSREG_FWD: 606 printf(sfmt, "Spacing Forward"); 607 break; 608 case MTIO_DSREG_REV: 609 printf(sfmt, "Spacing Reverse"); 610 break; 611 case MTIO_DSREG_POS: 612 printf(sfmt, 613 "Hardware Positioning (direction unknown)"); 614 break; 615 case MTIO_DSREG_REW: 616 printf(sfmt, "Rewinding"); 617 break; 618 case MTIO_DSREG_TEN: 619 printf(sfmt, "Retensioning"); 620 break; 621 case MTIO_DSREG_UNL: 622 printf(sfmt, "Unloading"); 623 break; 624 case MTIO_DSREG_LD: 625 printf(sfmt, "Loading"); 626 break; 627 default: 628 (void) sprintf(foo, "Unknown state 0x%x", bp->mt_dsreg); 629 printf(sfmt, foo); 630 break; 631 } 632 } 633 if (bp->mt_resid == 0 && bp->mt_fileno == (daddr_t) -1 && 634 bp->mt_blkno == (daddr_t) -1) 635 return; 636 printf("---------------------------------\n"); 637 printf("File Number: %d\tRecord Number: %d\tResidual Count %d\n", 638 bp->mt_fileno, bp->mt_blkno, bp->mt_resid); 639 } 640 641 void 642 warn_eof(void) 643 { 644 fprintf(stderr, 645 "The \"eof\" command has been disabled.\n" 646 "Use \"weof\" if you really want to write end-of-file marks,\n" 647 "or \"eom\" if you rather want to skip to the end of " 648 "recorded medium.\n"); 649 exit(1); 650 } 651