usr.bin/mt/mt.c

   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  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)mt.c     8.2 (Berkeley) 5/4/95
  35  * $FreeBSD: src/usr.bin/mt/mt.c,v 1.26.2.3 2002/11/08 11:35:57 joerg Exp $
  36  * $DragonFly: src/usr.bin/mt/mt.c,v 1.7 2005/09/10 21:03:27 swildner Exp $
  37  */
  38
  39 /*
  40  * mt --
  41  *   magnetic tape manipulation program
  42  */
  43 #include <sys/types.h>
  44 #include <sys/ioctl.h>
  45 #include <sys/mtio.h>
  46
  47 #include <ctype.h>
  48 #include <err.h>
  49 #include <fcntl.h>
  50 #include <stdio.h>
  51 #include <stdlib.h>
  52 #include <string.h>
  53 #include <unistd.h>
  54
  55 /* the appropriate sections of <sys/mtio.h> are also #ifdef'd for FreeBSD */
  56 #if defined(__DragonFly__)
  57 /* c_flags */
  58 #define NEED_2ARGS      0x01
  59 #define ZERO_ALLOWED    0x02
  60 #define IS_DENSITY      0x04
  61 #define DISABLE_THIS    0x08
  62 #define IS_COMP         0x10
  63 #endif /* defined(__DragonFly__) */
  64
  65 #ifndef TRUE
  66 #define TRUE 1
  67 #endif
  68 #ifndef FALSE
  69 #define FALSE 0
  70 #endif
  71
  72 struct commands {
  73         char *c_name;
  74         int c_code;
  75         int c_ronly;
  76 #if defined(__DragonFly__)
  77         int c_flags;
  78 #endif /* defined(__DragonFly__) */
  79 } com[] = {
  80         { "bsf",        MTBSF,  1 },
  81         { "bsr",        MTBSR,  1 },
  82 #if defined(__DragonFly__)
  83         /* XXX FreeBSD considered "eof" dangerous, since it's being
  84            confused with "eom" (and is an alias for "weof" anyway) */
  85         { "eof",        MTWEOF, 0, DISABLE_THIS },
  86 #else
  87         { "eof",        MTWEOF, 0 },
  88 #endif
  89         { "fsf",        MTFSF,  1 },
  90         { "fsr",        MTFSR,  1 },
  91         { "offline",    MTOFFL, 1 },
  92         { "rewind",     MTREW,  1 },
  93         { "rewoffl",    MTOFFL, 1 },
  94         { "status",     MTNOP,  1 },
  95 #if defined(__DragonFly__)
  96         { "weof",       MTWEOF, 0, ZERO_ALLOWED },
  97 #else
  98         { "weof",       MTWEOF, 0 },
  99 #endif
 100 #if defined(__DragonFly__)
 101         { "erase",      MTERASE, 0, ZERO_ALLOWED},
 102         { "blocksize",  MTSETBSIZ, 0, NEED_2ARGS|ZERO_ALLOWED },
 103         { "density",    MTSETDNSTY, 0, NEED_2ARGS|ZERO_ALLOWED|IS_DENSITY },
 104         { "eom",        MTEOD, 1 },
 105         { "eod",        MTEOD, 1 },
 106         { "smk",        MTWSS, 0 },
 107         { "wss",        MTWSS, 0 },
 108         { "fss",        MTFSS, 1 },
 109         { "bss",        MTBSS, 1 },
 110         { "comp",       MTCOMP, 0, NEED_2ARGS|ZERO_ALLOWED|IS_COMP },
 111         { "retension",  MTRETENS, 1 },
 112         { "rdhpos",     MTIOCRDHPOS,  0 },
 113         { "rdspos",     MTIOCRDSPOS,  0 },
 114         { "sethpos",    MTIOCHLOCATE, 0, NEED_2ARGS|ZERO_ALLOWED },
 115         { "setspos",    MTIOCSLOCATE, 0, NEED_2ARGS|ZERO_ALLOWED },
 116         { "errstat",    MTIOCERRSTAT, 0 },
 117         { "setmodel",   MTIOCSETEOTMODEL, 0, NEED_2ARGS|ZERO_ALLOWED },
 118         { "seteotmodel",        MTIOCSETEOTMODEL, 0, NEED_2ARGS|ZERO_ALLOWED },
 119         { "getmodel",   MTIOCGETEOTMODEL },
 120         { "geteotmodel",        MTIOCGETEOTMODEL },
 121 #endif /* defined(__DragonFly__) */
 122         { NULL }
 123 };
 124
 125 void printreg(char *, u_int, char *);
 126 void status(struct mtget *);
 127 void usage(void);
 128 #if defined (__DragonFly__)
 129 void st_status (struct mtget *);
 130 int stringtodens (const char *s);
 131 const char *denstostring (int d);
 132 int denstobp(int d, int bpi);
 133 u_int32_t stringtocomp(const char *s);
 134 const char * comptostring(u_int32_t comp);
 135 void warn_eof(void);
 136 #endif /* defined (__DragonFly__) */
 137
 138 int
 139 main(int argc, char **argv)
 140 {
 141         struct commands *comp;
 142         struct mtget mt_status;
 143         struct mtop mt_com;
 144         int ch, len, mtfd;
 145         char *p, *tape;
 146
 147         if ((tape = getenv("TAPE")) == NULL)
 148                 tape = DEFTAPE;
 149
 150         while ((ch = getopt(argc, argv, "f:t:")) != -1)
 151                 switch(ch) {
 152                 case 'f':
 153                 case 't':
 154                         tape = optarg;
 155                         break;
 156                 case '?':
 157                 default:
 158                         usage();
 159                 }
 160         argc -= optind;
 161         argv += optind;
 162
 163         if (argc < 1 || argc > 2)
 164                 usage();
 165
 166         len = strlen(p = *argv++);
 167         for (comp = com;; comp++) {
 168                 if (comp->c_name == NULL)
 169                         errx(1, "%s: unknown command", p);
 170                 if (strncmp(p, comp->c_name, len) == 0)
 171                         break;
 172         }
 173 #if defined(__DragonFly__)
 174         if((comp->c_flags & NEED_2ARGS) && argc != 2)
 175                 usage();
 176         if(comp->c_flags & DISABLE_THIS) {
 177                 warn_eof();
 178         }
 179 #endif /* defined(__DragonFly__) */
 180         if ((mtfd = open(tape, comp->c_ronly ? O_RDONLY : O_RDWR)) < 0)
 181                 err(1, "%s", tape);
 182         if (comp->c_code != MTNOP) {
 183                 mt_com.mt_op = comp->c_code;
 184                 if (*argv) {
 185 #if defined (__DragonFly__)
 186                         if (!isdigit(**argv) &&
 187                             (comp->c_flags & IS_DENSITY)) {
 188                                 const char *dcanon;
 189                                 mt_com.mt_count = stringtodens(*argv);
 190                                 if (mt_com.mt_count == 0)
 191                                         errx(1, "%s: unknown density", *argv);
 192                                 dcanon = denstostring(mt_com.mt_count);
 193                                 if (strcmp(dcanon, *argv) != 0)
 194                                         printf(
 195                                         "Using \"%s\" as an alias for %s\n",
 196                                                *argv, dcanon);
 197                                 p = "";
 198                         } else if (!isdigit(**argv) &&
 199                                    (comp->c_flags & IS_COMP)) {
 200
 201                                 mt_com.mt_count = stringtocomp(*argv);
 202                                 if ((u_int32_t)mt_com.mt_count == 0xf0f0f0f0)
 203                                         errx(1, "%s: unknown compression",
 204                                              *argv);
 205                                 p = "";
 206                         } else
 207                                 /* allow for hex numbers; useful for density */
 208                                 mt_com.mt_count = strtol(*argv, &p, 0);
 209 #else
 210                         mt_com.mt_count = strtol(*argv, &p, 10);
 211 #endif /* defined(__DragonFly__) */
 212                         if ((mt_com.mt_count <=
 213 #if defined (__DragonFly__)
 214                             ((comp->c_flags & ZERO_ALLOWED)? -1: 0)
 215                             && ((comp->c_flags & IS_COMP) == 0)
 216 #else
 217                             0
 218 #endif /* defined (__DragonFly__) */
 219                             ) || *p)
 220                                 errx(1, "%s: illegal count", *argv);
 221                 }
 222                 else
 223                         mt_com.mt_count = 1;
 224 #if     defined(__DragonFly__)
 225                 switch (comp->c_code) {
 226                 case MTIOCERRSTAT:
 227                 {
 228                         int i;
 229                         union mterrstat umn;
 230                         struct scsi_tape_errors *s = &umn.scsi_errstat;
 231
 232                         if (ioctl(mtfd, comp->c_code, (caddr_t)&umn) < 0)
 233                                 err(2, "%s", tape);
 234                         (void)printf("Last I/O Residual: %u\n", s->io_resid);
 235                         (void)printf(" Last I/O Command:");
 236                         for (i = 0; i < sizeof (s->io_cdb); i++)
 237                                 (void)printf(" %02X", s->io_cdb[i]);
 238                         (void)printf("\n");
 239                         (void)printf("   Last I/O Sense:\n\n\t");
 240                         for (i = 0; i < sizeof (s->io_sense); i++) {
 241                                 (void)printf(" %02X", s->io_sense[i]);
 242                                 if (((i + 1) & 0xf) == 0) {
 243                                         (void)printf("\n\t");
 244                                 }
 245                         }
 246                         (void)printf("\n");
 247                         (void)printf("Last Control Residual: %u\n",
 248                             s->ctl_resid);
 249                         (void)printf(" Last Control Command:");
 250                         for (i = 0; i < sizeof (s->ctl_cdb); i++)
 251                                 (void)printf(" %02X", s->ctl_cdb[i]);
 252                         (void)printf("\n");
 253                         (void)printf("   Last Control Sense:\n\n\t");
 254                         for (i = 0; i < sizeof (s->ctl_sense); i++) {
 255                                 (void)printf(" %02X", s->ctl_sense[i]);
 256                                 if (((i + 1) & 0xf) == 0) {
 257                                         (void)printf("\n\t");
 258                                 }
 259                         }
 260                         (void)printf("\n\n");
 261                         exit(0);
 262                         /* NOTREACHED */
 263                 }
 264                 case MTIOCRDHPOS:
 265                 case MTIOCRDSPOS:
 266                 {
 267                         u_int32_t block;
 268                         if (ioctl(mtfd, comp->c_code, (caddr_t)&block) < 0)
 269                                 err(2, "%s", tape);
 270                         (void)printf("%s: %s block location %u\n", tape,
 271                             (comp->c_code == MTIOCRDHPOS)? "hardware" :
 272                             "logical", block);
 273                         exit(0);
 274                         /* NOTREACHED */
 275                 }
 276                 case MTIOCSLOCATE:
 277                 case MTIOCHLOCATE:
 278                 {
 279                         u_int32_t block = (u_int32_t)mt_com.mt_count;
 280                         if (ioctl(mtfd, comp->c_code, (caddr_t)&block) < 0)
 281                                 err(2, "%s", tape);
 282                         exit(0);
 283                         /* NOTREACHED */
 284                 }
 285                 case MTIOCGETEOTMODEL:
 286                 {
 287                         u_int32_t om;
 288                         if (ioctl(mtfd, MTIOCGETEOTMODEL, (caddr_t)&om) < 0)
 289                                 err(2, "%s", tape);
 290                         (void)printf("%s: the model is %u filemar%s at EOT\n",
 291                             tape, om, (om > 1)? "ks" : "k");
 292                         exit(0);
 293                         /* NOTREACHED */
 294                 }
 295                 case MTIOCSETEOTMODEL:
 296                 {
 297                         u_int32_t om, nm = (u_int32_t)mt_com.mt_count;
 298                         if (ioctl(mtfd, MTIOCGETEOTMODEL, (caddr_t)&om) < 0)
 299                                 err(2, "%s", tape);
 300                         if (ioctl(mtfd, comp->c_code, (caddr_t)&nm) < 0)
 301                                 err(2, "%s", tape);
 302                         (void)printf("%s: old model was %u filemar%s at EOT\n",
 303                             tape, om, (om > 1)? "ks" : "k");
 304                         (void)printf("%s: new model  is %u filemar%s at EOT\n",
 305                             tape, nm, (nm > 1)? "ks" : "k");
 306                         exit(0);
 307                         /* NOTREACHED */
 308                 }
 309                 default:
 310                         break;
 311                 }
 312 #endif
 313                 if (ioctl(mtfd, MTIOCTOP, &mt_com) < 0)
 314                         err(1, "%s: %s", tape, comp->c_name);
 315         } else {
 316                 if (ioctl(mtfd, MTIOCGET, &mt_status) < 0)
 317                         err(1, NULL);
 318                 status(&mt_status);
 319         }
 320         exit(0);
 321         /* NOTREACHED */
 322 }
 323
 324 #ifdef sun
 325 #include <sundev/tmreg.h>
 326 #include <sundev/arreg.h>
 327 #endif
 328
 329 #if defined(__DragonFly__) && defined(__i386__)
 330 #include <machine/wtio.h>
 331 #endif
 332
 333 struct tape_desc {
 334         short   t_type;         /* type of magtape device */
 335         char    *t_name;        /* printing name */
 336         char    *t_dsbits;      /* "drive status" register */
 337         char    *t_erbits;      /* "error" register */
 338 } tapes[] = {
 339 #ifdef sun
 340         { MT_ISCPC,     "TapeMaster",   TMS_BITS,       0 },
 341         { MT_ISAR,      "Archive",      ARCH_CTRL_BITS, ARCH_BITS },
 342 #endif
 343 #if defined (__DragonFly__)
 344         /*
 345          * XXX This is weird.  The st driver reports the tape drive
 346          * as 0x7 (MT_ISAR - Sun/Archive compatible); the wt driver
 347          * either reports MT_ISVIPER1 for an Archive tape, or 0x11
 348          * (MT_ISMFOUR) for other tapes.
 349          * XXX for the wt driver, rely on it behaving like a "standard"
 350          * magtape driver.
 351          */
 352         { MT_ISAR,      "SCSI tape drive", 0,           0 },
 353 #if defined (__i386__)
 354         { MT_ISVIPER1,  "Archive Viper", WTDS_BITS, WTER_BITS },
 355         { MT_ISMFOUR,   "Wangtek",       WTDS_BITS, WTER_BITS },
 356 #endif
 357 #endif /* defined (__DragonFly__) */
 358         { 0 }
 359 };
 360
 361 /*
 362  * Interpret the status buffer returned
 363  */
 364 void
 365 status(struct mtget *bp)
 366 {
 367         struct tape_desc *mt;
 368
 369         for (mt = tapes;; mt++) {
 370                 if (mt->t_type == 0) {
 371                         (void)printf("%d: unknown tape drive type\n",
 372                             bp->mt_type);
 373                         return;
 374                 }
 375                 if (mt->t_type == bp->mt_type)
 376                         break;
 377         }
 378 #if defined (__DragonFly__)
 379         if(mt->t_type == MT_ISAR)
 380                 st_status(bp);
 381         else {
 382 #endif /* defined (__DragonFly__) */
 383         (void)printf("%s tape drive, residual=%d\n", mt->t_name, bp->mt_resid);
 384         printreg("ds", (unsigned short)bp->mt_dsreg, mt->t_dsbits);
 385         printreg("\ner", (unsigned short)bp->mt_erreg, mt->t_erbits);
 386         (void)putchar('\n');
 387 #if defined (__DragonFly__)
 388         }
 389 #endif /* defined (__DragonFly__) */
 390 }
 391
 392 /*
 393  * Print a register a la the %b format of the kernel's printf.
 394  */
 395 void
 396 printreg(char *s, u_int v, char *bits)
 397 {
 398         int i, any = 0;
 399         char c;
 400
 401         if (bits && *bits == 8)
 402                 printf("%s=%o", s, v);
 403         else
 404                 printf("%s=%x", s, v);
 405         if (!bits)
 406                 return;
 407         bits++;
 408         if (v && bits) {
 409                 putchar('<');
 410                 while ((i = *bits++)) {
 411                         if (v & (1 << (i-1))) {
 412                                 if (any)
 413                                         putchar(',');
 414                                 any = 1;
 415                                 for (; (c = *bits) > 32; bits++)
 416                                         putchar(c);
 417                         } else
 418                                 for (; *bits > 32; bits++)
 419                                         ;
 420                 }
 421                 putchar('>');
 422         }
 423 }
 424
 425 void
 426 usage(void)
 427 {
 428         (void)fprintf(stderr, "usage: mt [-f device] command [ count ]\n");
 429         exit(1);
 430 }
 431
 432 #if defined (__DragonFly__)
 433
 434 struct densities {
 435         int dens;
 436         int bpmm;
 437         int bpi;
 438         const char *name;
 439 } dens[] = {
 440         /*
 441          * Taken from T10 Project 997D
 442          * SCSI-3 Stream Device Commands (SSC)
 443          * Revision 11, 4-Nov-97
 444          */
 445         /*Num.  bpmm    bpi     Reference     */
 446         { 0x1,  32,     800,    "X3.22-1983" },
 447         { 0x2,  63,     1600,   "X3.39-1986" },
 448         { 0x3,  246,    6250,   "X3.54-1986" },
 449         { 0x5,  315,    8000,   "X3.136-1986" },
 450         { 0x6,  126,    3200,   "X3.157-1987" },
 451         { 0x7,  252,    6400,   "X3.116-1986" },
 452         { 0x8,  315,    8000,   "X3.158-1987" },
 453         { 0x9,  491,    37871,  "X3.180" },
 454         { 0xA,  262,    6667,   "X3B5/86-199" },
 455         { 0xB,  63,     1600,   "X3.56-1986" },
 456         { 0xC,  500,    12690,  "HI-TC1" },
 457         { 0xD,  999,    25380,  "HI-TC2" },
 458         { 0xF,  394,    10000,  "QIC-120" },
 459         { 0x10, 394,    10000,  "QIC-150" },
 460         { 0x11, 630,    16000,  "QIC-320" },
 461         { 0x12, 2034,   51667,  "QIC-1350" },
 462         { 0x13, 2400,   61000,  "X3B5/88-185A" },
 463         { 0x14, 1703,   43245,  "X3.202-1991" },
 464         { 0x15, 1789,   45434,  "ECMA TC17" },
 465         { 0x16, 394,    10000,  "X3.193-1990" },
 466         { 0x17, 1673,   42500,  "X3B5/91-174" },
 467         { 0x18, 1673,   42500,  "X3B5/92-50" },
 468         { 0x19, 2460,   62500,  "DLTapeIII" },
 469         { 0x1A, 3214,   81633,  "DLTapeIV(20GB)" },
 470         { 0x1B, 3383,   85937,  "DLTapeIV(35GB)" },
 471         { 0x1C, 1654,   42000,  "QIC-385M" },
 472         { 0x1D, 1512,   38400,  "QIC-410M" },
 473         { 0x1E, 1385,   36000,  "QIC-1000C" },
 474         { 0x1F, 2666,   67733,  "QIC-2100C" },
 475         { 0x20, 2666,   67733,  "QIC-6GB(M)" },
 476         { 0x21, 2666,   67733,  "QIC-20GB(C)" },
 477         { 0x22, 1600,   40640,  "QIC-2GB(C)" },
 478         { 0x23, 2666,   67733,  "QIC-875M" },
 479         { 0x24, 2400,   61000,  "DDS-2" },
 480         { 0x25, 3816,   97000,  "DDS-3" },
 481         { 0x26, 3816,   97000,  "DDS-4" },
 482         { 0x27, 3056,   77611,  "Mammoth" },
 483         { 0x28, 1491,   37871,  "X3.224" },
 484         { 0x41, 3868,   98250,  "DLTapeIV(40GB)" },
 485         { 0x48, 5236,   133000, "SDLTapeI(110)" },
 486         { 0x49, 7598,   193000, "SDLTapeI(160)" },
 487         { 0, 0, 0, NULL }
 488 };
 489
 490 struct compression_types {
 491         u_int32_t       comp_number;
 492         const char      *name;
 493 } comp_types[] = {
 494         { 0x00, "none" },
 495         { 0x00, "off" },
 496         { 0x10, "IDRC" },
 497         { 0x20, "DCLZ" },
 498         { 0xffffffff, "enable" },
 499         { 0xffffffff, "on" },
 500         { 0xf0f0f0f0, NULL}
 501 };
 502
 503 const char *
 504 denstostring(int d)
 505 {
 506         static char buf[20];
 507         struct densities *sd;
 508
 509         /* densities 0 and 0x7f are handled as special cases */
 510         if (d == 0)
 511                 return "default";
 512         if (d == 0x7f)
 513                 return "same";
 514         for (sd = dens; sd->dens; sd++)
 515                 if (sd->dens == d)
 516                         break;
 517         if (sd->dens == 0)
 518                 sprintf(buf, "0x%02x", d);
 519         else
 520                 sprintf(buf, "0x%02x:%s", d, sd->name);
 521         return buf;
 522 }
 523
 524 /*
 525  * Given a specific density number, return either the bits per inch or bits
 526  * per millimeter for the given density.
 527  */
 528 int
 529 denstobp(int d, int bpi)
 530 {
 531         struct densities *sd;
 532
 533         for (sd = dens; sd->dens; sd++)
 534                 if (sd->dens == d)
 535                         break;
 536         if (sd->dens == 0)
 537                 return(0);
 538         else {
 539                 if (bpi)
 540                         return(sd->bpi);
 541                 else
 542                         return(sd->bpmm);
 543         }
 544 }
 545
 546 int
 547 stringtodens(const char *s)
 548 {
 549         struct densities *sd;
 550         size_t l = strlen(s);
 551
 552         for (sd = dens; sd->dens; sd++)
 553                 if (strncasecmp(sd->name, s, l) == 0)
 554                         break;
 555         return sd->dens;
 556 }
 557
 558
 559 const char *
 560 getblksiz(int bs)
 561 {
 562         static char buf[25];
 563         if (bs == 0)
 564                 return "variable";
 565         else {
 566                 sprintf(buf, "%d bytes", bs);
 567                 return buf;
 568         }
 569 }
 570
 571 const char *
 572 comptostring(u_int32_t comp)
 573 {
 574         static char buf[20];
 575         struct compression_types *ct;
 576
 577         if (comp == MT_COMP_DISABLED)
 578                 return "disabled";
 579         else if (comp == MT_COMP_UNSUPP)
 580                 return "unsupported";
 581
 582         for (ct = comp_types; ct->name; ct++)
 583                 if (ct->comp_number == comp)
 584                         break;
 585
 586         if (ct->comp_number == 0xf0f0f0f0) {
 587                 sprintf(buf, "0x%x", comp);
 588                 return(buf);
 589         } else
 590                 return(ct->name);
 591 }
 592
 593 u_int32_t
 594 stringtocomp(const char *s)
 595 {
 596         struct compression_types *ct;
 597         size_t l = strlen(s);
 598
 599         for (ct = comp_types; ct->name; ct++)
 600                 if (strncasecmp(ct->name, s, l) == 0)
 601                         break;
 602
 603         return(ct->comp_number);
 604 }
 605
 606 void
 607 st_status(struct mtget *bp)
 608 {
 609         printf("Mode      Density              Blocksize      bpi      "
 610                "Compression\n"
 611                "Current:  %-17s    %-12s   %-7d  %s\n"
 612                "---------available modes---------\n"
 613                "0:        %-17s    %-12s   %-7d  %s\n"
 614                "1:        %-17s    %-12s   %-7d  %s\n"
 615                "2:        %-17s    %-12s   %-7d  %s\n"
 616                "3:        %-17s    %-12s   %-7d  %s\n",
 617                denstostring(bp->mt_density), getblksiz(bp->mt_blksiz),
 618                denstobp(bp->mt_density, TRUE), comptostring(bp->mt_comp),
 619                denstostring(bp->mt_density0), getblksiz(bp->mt_blksiz0),
 620                denstobp(bp->mt_density0, TRUE), comptostring(bp->mt_comp0),
 621                denstostring(bp->mt_density1), getblksiz(bp->mt_blksiz1),
 622                denstobp(bp->mt_density1, TRUE), comptostring(bp->mt_comp1),
 623                denstostring(bp->mt_density2), getblksiz(bp->mt_blksiz2),
 624                denstobp(bp->mt_density2, TRUE), comptostring(bp->mt_comp2),
 625                denstostring(bp->mt_density3), getblksiz(bp->mt_blksiz3),
 626                denstobp(bp->mt_density3, TRUE), comptostring(bp->mt_comp3));
 627
 628         if (bp->mt_dsreg != MTIO_DSREG_NIL) {
 629                 auto char foo[32];
 630                 const char *sfmt = "Current Driver State: %s.\n";
 631                 printf("---------------------------------\n");
 632                 switch (bp->mt_dsreg) {
 633                 case MTIO_DSREG_REST:
 634                         printf(sfmt, "at rest");
 635                         break;
 636                 case MTIO_DSREG_RBSY:
 637                         printf(sfmt, "Communicating with drive");
 638                         break;
 639                 case MTIO_DSREG_WR:
 640                         printf(sfmt, "Writing");
 641                         break;
 642                 case MTIO_DSREG_FMK:
 643                         printf(sfmt, "Writing Filemarks");
 644                         break;
 645                 case MTIO_DSREG_ZER:
 646                         printf(sfmt, "Erasing");
 647                         break;
 648                 case MTIO_DSREG_RD:
 649                         printf(sfmt, "Reading");
 650                         break;
 651                 case MTIO_DSREG_FWD:
 652                         printf(sfmt, "Spacing Forward");
 653                         break;
 654                 case MTIO_DSREG_REV:
 655                         printf(sfmt, "Spacing Reverse");
 656                         break;
 657                 case MTIO_DSREG_POS:
 658                         printf(sfmt,
 659                             "Hardware Positioning (direction unknown)");
 660                         break;
 661                 case MTIO_DSREG_REW:
 662                         printf(sfmt, "Rewinding");
 663                         break;
 664                 case MTIO_DSREG_TEN:
 665                         printf(sfmt, "Retensioning");
 666                         break;
 667                 case MTIO_DSREG_UNL:
 668                         printf(sfmt, "Unloading");
 669                         break;
 670                 case MTIO_DSREG_LD:
 671                         printf(sfmt, "Loading");
 672                         break;
 673                 default:
 674                         (void) sprintf(foo, "Unknown state 0x%x", bp->mt_dsreg);
 675                         printf(sfmt, foo);
 676                         break;
 677                 }
 678         }
 679         if (bp->mt_resid == 0 && bp->mt_fileno == (daddr_t) -1 &&
 680             bp->mt_blkno == (daddr_t) -1)
 681                 return;
 682         printf("---------------------------------\n");
 683         printf("File Number: %ld\tRecord Number: %ld\tResidual Count %d\n",
 684             bp->mt_fileno, bp->mt_blkno, bp->mt_resid);
 685 }
 686
 687 void
 688 warn_eof(void)
 689 {
 690         fprintf(stderr,
 691                 "The \"eof\" command has been disabled.\n"
 692                 "Use \"weof\" if you really want to write end-of-file marks,\n"
 693                 "or \"eom\" if you rather want to skip to the end of "
 694                 "recorded medium.\n");
 695         exit(1);
 696 }
 697
 698 #endif /* defined (__DragonFly__) */