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 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, 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(argc, argv) 135 int argc; 136 char *argv[]; 137 { 138 register struct commands *comp; 139 struct mtget mt_status; 140 struct mtop mt_com; 141 int ch, len, mtfd; 142 char *p, *tape; 143 144 if ((tape = getenv("TAPE")) == NULL) 145 tape = DEFTAPE; 146 147 while ((ch = getopt(argc, argv, "f:t:")) != -1) 148 switch(ch) { 149 case 'f': 150 case 't': 151 tape = optarg; 152 break; 153 case '?': 154 default: 155 usage(); 156 } 157 argc -= optind; 158 argv += optind; 159 160 if (argc < 1 || argc > 2) 161 usage(); 162 163 len = strlen(p = *argv++); 164 for (comp = com;; comp++) { 165 if (comp->c_name == NULL) 166 errx(1, "%s: unknown command", p); 167 if (strncmp(p, comp->c_name, len) == 0) 168 break; 169 } 170 if((comp->c_flags & NEED_2ARGS) && argc != 2) 171 usage(); 172 if(comp->c_flags & DISABLE_THIS) { 173 warn_eof(); 174 } 175 if ((mtfd = open(tape, comp->c_ronly ? O_RDONLY : O_RDWR)) < 0) 176 err(1, "%s", tape); 177 if (comp->c_code != MTNOP) { 178 mt_com.mt_op = comp->c_code; 179 if (*argv) { 180 if (!isdigit(**argv) && 181 (comp->c_flags & IS_DENSITY)) { 182 const char *dcanon; 183 mt_com.mt_count = stringtodens(*argv); 184 if (mt_com.mt_count == 0) 185 errx(1, "%s: unknown density", *argv); 186 dcanon = denstostring(mt_com.mt_count); 187 if (strcmp(dcanon, *argv) != 0) 188 printf( 189 "Using \"%s\" as an alias for %s\n", 190 *argv, dcanon); 191 p = ""; 192 } else if (!isdigit(**argv) && 193 (comp->c_flags & IS_COMP)) { 194 195 mt_com.mt_count = stringtocomp(*argv); 196 if ((u_int32_t)mt_com.mt_count == 0xf0f0f0f0) 197 errx(1, "%s: unknown compression", 198 *argv); 199 p = ""; 200 } else 201 /* allow for hex numbers; useful for density */ 202 mt_com.mt_count = strtol(*argv, &p, 0); 203 if ((mt_com.mt_count <= 204 ((comp->c_flags & ZERO_ALLOWED)? -1: 0) 205 && ((comp->c_flags & IS_COMP) == 0) 206 ) || *p) 207 errx(1, "%s: illegal count", *argv); 208 } 209 else 210 mt_com.mt_count = 1; 211 switch (comp->c_code) { 212 case MTIOCERRSTAT: 213 { 214 unsigned int i; 215 union mterrstat umn; 216 struct scsi_tape_errors *s = &umn.scsi_errstat; 217 218 if (ioctl(mtfd, comp->c_code, (caddr_t)&umn) < 0) 219 err(2, "%s", tape); 220 (void)printf("Last I/O Residual: %u\n", s->io_resid); 221 (void)printf(" Last I/O Command:"); 222 for (i = 0; i < sizeof (s->io_cdb); i++) 223 (void)printf(" %02X", s->io_cdb[i]); 224 (void)printf("\n"); 225 (void)printf(" Last I/O Sense:\n\n\t"); 226 for (i = 0; i < sizeof (s->io_sense); i++) { 227 (void)printf(" %02X", s->io_sense[i]); 228 if (((i + 1) & 0xf) == 0) { 229 (void)printf("\n\t"); 230 } 231 } 232 (void)printf("\n"); 233 (void)printf("Last Control Residual: %u\n", 234 s->ctl_resid); 235 (void)printf(" Last Control Command:"); 236 for (i = 0; i < sizeof (s->ctl_cdb); i++) 237 (void)printf(" %02X", s->ctl_cdb[i]); 238 (void)printf("\n"); 239 (void)printf(" Last Control Sense:\n\n\t"); 240 for (i = 0; i < sizeof (s->ctl_sense); i++) { 241 (void)printf(" %02X", s->ctl_sense[i]); 242 if (((i + 1) & 0xf) == 0) { 243 (void)printf("\n\t"); 244 } 245 } 246 (void)printf("\n\n"); 247 exit(0); 248 /* NOTREACHED */ 249 } 250 case MTIOCRDHPOS: 251 case MTIOCRDSPOS: 252 { 253 u_int32_t block; 254 if (ioctl(mtfd, comp->c_code, (caddr_t)&block) < 0) 255 err(2, "%s", tape); 256 (void)printf("%s: %s block location %u\n", tape, 257 (comp->c_code == MTIOCRDHPOS)? "hardware" : 258 "logical", block); 259 exit(0); 260 /* NOTREACHED */ 261 } 262 case MTIOCSLOCATE: 263 case MTIOCHLOCATE: 264 { 265 u_int32_t block = (u_int32_t)mt_com.mt_count; 266 if (ioctl(mtfd, comp->c_code, (caddr_t)&block) < 0) 267 err(2, "%s", tape); 268 exit(0); 269 /* NOTREACHED */ 270 } 271 case MTIOCGETEOTMODEL: 272 { 273 u_int32_t om; 274 if (ioctl(mtfd, MTIOCGETEOTMODEL, (caddr_t)&om) < 0) 275 err(2, "%s", tape); 276 (void)printf("%s: the model is %u filemar%s at EOT\n", 277 tape, om, (om > 1)? "ks" : "k"); 278 exit(0); 279 /* NOTREACHED */ 280 } 281 case MTIOCSETEOTMODEL: 282 { 283 u_int32_t om, nm = (u_int32_t)mt_com.mt_count; 284 if (ioctl(mtfd, MTIOCGETEOTMODEL, (caddr_t)&om) < 0) 285 err(2, "%s", tape); 286 if (ioctl(mtfd, comp->c_code, (caddr_t)&nm) < 0) 287 err(2, "%s", tape); 288 (void)printf("%s: old model was %u filemar%s at EOT\n", 289 tape, om, (om > 1)? "ks" : "k"); 290 (void)printf("%s: new model is %u filemar%s at EOT\n", 291 tape, nm, (nm > 1)? "ks" : "k"); 292 exit(0); 293 /* NOTREACHED */ 294 } 295 default: 296 break; 297 } 298 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0) 299 err(1, "%s: %s", tape, comp->c_name); 300 } else { 301 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0) 302 err(1, NULL); 303 status(&mt_status); 304 } 305 exit(0); 306 /* NOTREACHED */ 307 } 308 309 struct tape_desc { 310 short t_type; /* type of magtape device */ 311 char *t_name; /* printing name */ 312 char *t_dsbits; /* "drive status" register */ 313 char *t_erbits; /* "error" register */ 314 } tapes[] = { 315 { MT_ISAR, "SCSI tape drive", 0, 0 }, 316 { 0, NULL, 0, 0 } 317 }; 318 319 /* 320 * Interpret the status buffer returned 321 */ 322 void 323 status(bp) 324 register struct mtget *bp; 325 { 326 register 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(s, v, bits) 353 const char *s; 354 register u_int v; 355 register char *bits; 356 { 357 register int i, any = 0; 358 register char c; 359 360 if (bits && *bits == 8) 361 printf("%s=%o", s, v); 362 else 363 printf("%s=%x", s, v); 364 if (!bits) 365 return; 366 bits++; 367 if (v && bits) { 368 putchar('<'); 369 while ((i = *bits++)) { 370 if (v & (1 << (i-1))) { 371 if (any) 372 putchar(','); 373 any = 1; 374 for (; (c = *bits) > 32; bits++) 375 putchar(c); 376 } else 377 for (; *bits > 32; bits++) 378 ; 379 } 380 putchar('>'); 381 } 382 } 383 384 void 385 usage() 386 { 387 (void)fprintf(stderr, "usage: mt [-f device] command [count]\n"); 388 exit(1); 389 } 390 391 struct densities { 392 int dens; 393 int bpmm; 394 int bpi; 395 const char *name; 396 } dens[] = { 397 /* 398 * Taken from T10 Project 997D 399 * SCSI-3 Stream Device Commands (SSC) 400 * Revision 11, 4-Nov-97 401 */ 402 /*Num. bpmm bpi Reference */ 403 { 0x1, 32, 800, "X3.22-1983" }, 404 { 0x2, 63, 1600, "X3.39-1986" }, 405 { 0x3, 246, 6250, "X3.54-1986" }, 406 { 0x5, 315, 8000, "X3.136-1986" }, 407 { 0x6, 126, 3200, "X3.157-1987" }, 408 { 0x7, 252, 6400, "X3.116-1986" }, 409 { 0x8, 315, 8000, "X3.158-1987" }, 410 { 0x9, 491, 37871, "X3.180" }, 411 { 0xA, 262, 6667, "X3B5/86-199" }, 412 { 0xB, 63, 1600, "X3.56-1986" }, 413 { 0xC, 500, 12690, "HI-TC1" }, 414 { 0xD, 999, 25380, "HI-TC2" }, 415 { 0xF, 394, 10000, "QIC-120" }, 416 { 0x10, 394, 10000, "QIC-150" }, 417 { 0x11, 630, 16000, "QIC-320" }, 418 { 0x12, 2034, 51667, "QIC-1350" }, 419 { 0x13, 2400, 61000, "X3B5/88-185A" }, 420 { 0x14, 1703, 43245, "X3.202-1991" }, 421 { 0x15, 1789, 45434, "ECMA TC17" }, 422 { 0x16, 394, 10000, "X3.193-1990" }, 423 { 0x17, 1673, 42500, "X3B5/91-174" }, 424 { 0x18, 1673, 42500, "X3B5/92-50" }, 425 { 0x19, 2460, 62500, "DLTapeIII" }, 426 { 0x1A, 3214, 81633, "DLTapeIV(20GB)" }, 427 { 0x1B, 3383, 85937, "DLTapeIV(35GB)" }, 428 { 0x1C, 1654, 42000, "QIC-385M" }, 429 { 0x1D, 1512, 38400, "QIC-410M" }, 430 { 0x1E, 1385, 36000, "QIC-1000C" }, 431 { 0x1F, 2666, 67733, "QIC-2100C" }, 432 { 0x20, 2666, 67733, "QIC-6GB(M)" }, 433 { 0x21, 2666, 67733, "QIC-20GB(C)" }, 434 { 0x22, 1600, 40640, "QIC-2GB(C)" }, 435 { 0x23, 2666, 67733, "QIC-875M" }, 436 { 0x24, 2400, 61000, "DDS-2" }, 437 { 0x25, 3816, 97000, "DDS-3" }, 438 { 0x26, 3816, 97000, "DDS-4" }, 439 { 0x27, 3056, 77611, "Mammoth" }, 440 { 0x28, 1491, 37871, "X3.224" }, 441 { 0x41, 3868, 98250, "DLTapeIV(40GB)" }, 442 { 0x48, 5236, 133000, "SDLTapeI(110)" }, 443 { 0x49, 7598, 193000, "SDLTapeI(160)" }, 444 { 0, 0, 0, NULL } 445 }; 446 447 struct compression_types { 448 u_int32_t comp_number; 449 const char *name; 450 } comp_types[] = { 451 { 0x00, "none" }, 452 { 0x00, "off" }, 453 { 0x10, "IDRC" }, 454 { 0x20, "DCLZ" }, 455 { 0xffffffff, "enable" }, 456 { 0xffffffff, "on" }, 457 { 0xf0f0f0f0, NULL} 458 }; 459 460 const char * 461 denstostring(int d) 462 { 463 static char buf[20]; 464 struct densities *sd; 465 466 /* densities 0 and 0x7f are handled as special cases */ 467 if (d == 0) 468 return "default"; 469 if (d == 0x7f) 470 return "same"; 471 for (sd = dens; sd->dens; sd++) 472 if (sd->dens == d) 473 break; 474 if (sd->dens == 0) 475 sprintf(buf, "0x%02x", d); 476 else 477 sprintf(buf, "0x%02x:%s", d, sd->name); 478 return buf; 479 } 480 481 /* 482 * Given a specific density number, return either the bits per inch or bits 483 * per millimeter for the given density. 484 */ 485 int 486 denstobp(int d, int bpi) 487 { 488 struct densities *sd; 489 490 for (sd = dens; sd->dens; sd++) 491 if (sd->dens == d) 492 break; 493 if (sd->dens == 0) 494 return(0); 495 else { 496 if (bpi) 497 return(sd->bpi); 498 else 499 return(sd->bpmm); 500 } 501 } 502 503 int 504 stringtodens(const char *s) 505 { 506 struct densities *sd; 507 size_t l = strlen(s); 508 509 for (sd = dens; sd->dens; sd++) 510 if (strncasecmp(sd->name, s, l) == 0) 511 break; 512 return sd->dens; 513 } 514 515 516 const char * 517 getblksiz(int bs) 518 { 519 static char buf[25]; 520 if (bs == 0) 521 return "variable"; 522 else { 523 sprintf(buf, "%d bytes", bs); 524 return buf; 525 } 526 } 527 528 const char * 529 comptostring(u_int32_t comp) 530 { 531 static char buf[20]; 532 struct compression_types *ct; 533 534 if (comp == MT_COMP_DISABLED) 535 return "disabled"; 536 else if (comp == MT_COMP_UNSUPP) 537 return "unsupported"; 538 539 for (ct = comp_types; ct->name; ct++) 540 if (ct->comp_number == comp) 541 break; 542 543 if (ct->comp_number == 0xf0f0f0f0) { 544 sprintf(buf, "0x%x", comp); 545 return(buf); 546 } else 547 return(ct->name); 548 } 549 550 u_int32_t 551 stringtocomp(const char *s) 552 { 553 struct compression_types *ct; 554 size_t l = strlen(s); 555 556 for (ct = comp_types; ct->name; ct++) 557 if (strncasecmp(ct->name, s, l) == 0) 558 break; 559 560 return(ct->comp_number); 561 } 562 563 void 564 st_status(struct mtget *bp) 565 { 566 printf("Mode Density Blocksize bpi " 567 "Compression\n" 568 "Current: %-17s %-12s %-7d %s\n" 569 "---------available modes---------\n" 570 "0: %-17s %-12s %-7d %s\n" 571 "1: %-17s %-12s %-7d %s\n" 572 "2: %-17s %-12s %-7d %s\n" 573 "3: %-17s %-12s %-7d %s\n", 574 denstostring(bp->mt_density), getblksiz(bp->mt_blksiz), 575 denstobp(bp->mt_density, TRUE), comptostring(bp->mt_comp), 576 denstostring(bp->mt_density0), getblksiz(bp->mt_blksiz0), 577 denstobp(bp->mt_density0, TRUE), comptostring(bp->mt_comp0), 578 denstostring(bp->mt_density1), getblksiz(bp->mt_blksiz1), 579 denstobp(bp->mt_density1, TRUE), comptostring(bp->mt_comp1), 580 denstostring(bp->mt_density2), getblksiz(bp->mt_blksiz2), 581 denstobp(bp->mt_density2, TRUE), comptostring(bp->mt_comp2), 582 denstostring(bp->mt_density3), getblksiz(bp->mt_blksiz3), 583 denstobp(bp->mt_density3, TRUE), comptostring(bp->mt_comp3)); 584 585 if (bp->mt_dsreg != MTIO_DSREG_NIL) { 586 auto char foo[32]; 587 const char sfmt[] = "Current Driver State: %s.\n"; 588 printf("---------------------------------\n"); 589 switch (bp->mt_dsreg) { 590 case MTIO_DSREG_REST: 591 printf(sfmt, "at rest"); 592 break; 593 case MTIO_DSREG_RBSY: 594 printf(sfmt, "Communicating with drive"); 595 break; 596 case MTIO_DSREG_WR: 597 printf(sfmt, "Writing"); 598 break; 599 case MTIO_DSREG_FMK: 600 printf(sfmt, "Writing Filemarks"); 601 break; 602 case MTIO_DSREG_ZER: 603 printf(sfmt, "Erasing"); 604 break; 605 case MTIO_DSREG_RD: 606 printf(sfmt, "Reading"); 607 break; 608 case MTIO_DSREG_FWD: 609 printf(sfmt, "Spacing Forward"); 610 break; 611 case MTIO_DSREG_REV: 612 printf(sfmt, "Spacing Reverse"); 613 break; 614 case MTIO_DSREG_POS: 615 printf(sfmt, 616 "Hardware Positioning (direction unknown)"); 617 break; 618 case MTIO_DSREG_REW: 619 printf(sfmt, "Rewinding"); 620 break; 621 case MTIO_DSREG_TEN: 622 printf(sfmt, "Retensioning"); 623 break; 624 case MTIO_DSREG_UNL: 625 printf(sfmt, "Unloading"); 626 break; 627 case MTIO_DSREG_LD: 628 printf(sfmt, "Loading"); 629 break; 630 default: 631 (void) sprintf(foo, "Unknown state 0x%x", bp->mt_dsreg); 632 printf(sfmt, foo); 633 break; 634 } 635 } 636 if (bp->mt_resid == 0 && bp->mt_fileno == (daddr_t) -1 && 637 bp->mt_blkno == (daddr_t) -1) 638 return; 639 printf("---------------------------------\n"); 640 printf("File Number: %d\tRecord Number: %d\tResidual Count %d\n", 641 bp->mt_fileno, bp->mt_blkno, bp->mt_resid); 642 } 643 644 void 645 warn_eof(void) 646 { 647 fprintf(stderr, 648 "The \"eof\" command has been disabled.\n" 649 "Use \"weof\" if you really want to write end-of-file marks,\n" 650 "or \"eom\" if you rather want to skip to the end of " 651 "recorded medium.\n"); 652 exit(1); 653 } 654