bsd/isofs/cd9660/cd9660_rrip.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*      $NetBSD: cd9660_rrip.c,v 1.11 1994/12/24 15:30:10 cgd Exp $     */
  26
  27 /*-
  28  * Copyright (c) 1993, 1994
  29  *      The Regents of the University of California.  All rights reserved.
  30  *
  31  * This code is derived from software contributed to Berkeley
  32  * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
  33  * Support code is derived from software contributed to Berkeley
  34  * by Atsushi Murai (amurai@spec.co.jp).
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)cd9660_rrip.c       8.6 (Berkeley) 12/5/94
  65
  66
  67
  68  * HISTORY
  69  * 22-Jan-98    radar 1669467 - ISO 9660 CD support - jwc
  70
  71  */
  72
  73 #include <sys/param.h>
  74 #include <sys/systm.h>
  75 #include <sys/vnode.h>
  76 #include <sys/mount.h>
  77 #include <sys/namei.h>
  78 #include <sys/buf.h>
  79 #include <sys/file.h>
  80 #include <sys/kernel.h>
  81 #include <sys/stat.h>
  82 #include <sys/types.h>
  83
  84 #include <sys/time.h>
  85
  86 #include <isofs/cd9660/iso.h>
  87 #include <isofs/cd9660/cd9660_node.h>
  88 #include <isofs/cd9660/cd9660_rrip.h>
  89 #include <isofs/cd9660/iso_rrip.h>
  90
  91 /*
  92  * POSIX file attribute
  93  */
  94 static int
  95 cd9660_rrip_attr(p,ana)
  96         ISO_RRIP_ATTR *p;
  97         ISO_RRIP_ANALYZE *ana;
  98 {
  99         ana->inop->inode.iso_mode = isonum_733(p->mode);
 100         ana->inop->inode.iso_uid = isonum_733(p->uid);
 101         ana->inop->inode.iso_gid = isonum_733(p->gid);
 102         ana->inop->inode.iso_links = isonum_733(p->links);
 103         ana->fields &= ~ISO_SUSP_ATTR;
 104         return ISO_SUSP_ATTR;
 105 }
 106
 107 static void
 108 cd9660_rrip_defattr(isodir,ana)
 109         struct iso_directory_record *isodir;
 110         ISO_RRIP_ANALYZE *ana;
 111 {
 112         /* But this is a required field! */
 113         printf("RRIP without PX field?\n");
 114         cd9660_defattr(isodir,ana->inop,NULL);
 115 }
 116
 117 /*
 118  * Symbolic Links
 119  */
 120 static int
 121 cd9660_rrip_slink(p,ana)
 122         ISO_RRIP_SLINK  *p;
 123         ISO_RRIP_ANALYZE *ana;
 124 {
 125         register ISO_RRIP_SLINK_COMPONENT *pcomp;
 126         register ISO_RRIP_SLINK_COMPONENT *pcompe;
 127         int len, wlen, cont;
 128         char *outbuf, *inbuf;
 129
 130         pcomp = (ISO_RRIP_SLINK_COMPONENT *)p->component;
 131         pcompe = (ISO_RRIP_SLINK_COMPONENT *)((char *)p + isonum_711(p->h.length));
 132         len = *ana->outlen;
 133         outbuf = ana->outbuf;
 134         cont = ana->cont;
 135
 136         /*
 137          * Gathering a Symbolic name from each component with path
 138          */
 139         for (;
 140              pcomp < pcompe;
 141              pcomp = (ISO_RRIP_SLINK_COMPONENT *)((char *)pcomp + ISO_RRIP_SLSIZ
 142                                                   + isonum_711(pcomp->clen))) {
 143
 144                 if (!cont) {
 145                         if (len < ana->maxlen) {
 146                                 len++;
 147                                 *outbuf++ = '/';
 148                         }
 149                 }
 150                 cont = 0;
 151
 152                 inbuf = "..";
 153                 wlen = 0;
 154
 155                 switch (*pcomp->cflag) {
 156
 157                 case ISO_SUSP_CFLAG_CURRENT:
 158                         /* Inserting Current */
 159                         wlen = 1;
 160                         break;
 161
 162                 case ISO_SUSP_CFLAG_PARENT:
 163                         /* Inserting Parent */
 164                         wlen = 2;
 165                         break;
 166
 167                 case ISO_SUSP_CFLAG_ROOT:
 168                         /* Inserting slash for ROOT */
 169                         /* start over from beginning(?) */
 170                         outbuf -= len;
 171                         len = 0;
 172                         break;
 173
 174                 case ISO_SUSP_CFLAG_VOLROOT:
 175                         /* Inserting a mount point i.e. "/cdrom" */
 176                         /* same as above */
 177                         outbuf -= len;
 178                         len = 0;
 179                         inbuf = ana->imp->im_mountp->mnt_stat.f_mntonname;
 180                         wlen = strlen(inbuf);
 181                         break;
 182
 183                 case ISO_SUSP_CFLAG_HOST:
 184                         /* Inserting hostname i.e. "kurt.tools.de" */
 185                         inbuf = hostname;
 186                         wlen = hostnamelen;
 187                         break;
 188
 189                 case ISO_SUSP_CFLAG_CONTINUE:
 190                         cont = 1;
 191                         /* fall thru */
 192                 case 0:
 193                         /* Inserting component */
 194                         wlen = isonum_711(pcomp->clen);
 195                         inbuf = pcomp->name;
 196                         break;
 197                 default:
 198                         printf("RRIP with incorrect flags?");
 199                         wlen = ana->maxlen + 1;
 200                         break;
 201                 }
 202
 203                 if (len + wlen > ana->maxlen) {
 204                         /* indicate error to caller */
 205                         ana->cont = 1;
 206                         ana->fields = 0;
 207                         ana->outbuf -= *ana->outlen;
 208                         *ana->outlen = 0;
 209                         return 0;
 210                 }
 211
 212                 bcopy(inbuf,outbuf,wlen);
 213                 outbuf += wlen;
 214                 len += wlen;
 215
 216         }
 217         ana->outbuf = outbuf;
 218         *ana->outlen = len;
 219         ana->cont = cont;
 220
 221         if (!isonum_711(p->flags)) {
 222                 ana->fields &= ~ISO_SUSP_SLINK;
 223                 return ISO_SUSP_SLINK;
 224         }
 225         return 0;
 226 }
 227
 228 /*
 229  * Alternate name
 230  */
 231 static int
 232 cd9660_rrip_altname(p,ana)
 233         ISO_RRIP_ALTNAME *p;
 234         ISO_RRIP_ANALYZE *ana;
 235 {
 236         char *inbuf;
 237         int wlen;
 238         int cont;
 239
 240         inbuf = "..";
 241         wlen = 0;
 242         cont = 0;
 243
 244         switch (*p->flags) {
 245         case ISO_SUSP_CFLAG_CURRENT:
 246                 /* Inserting Current */
 247                 wlen = 1;
 248                 break;
 249
 250         case ISO_SUSP_CFLAG_PARENT:
 251                 /* Inserting Parent */
 252                 wlen = 2;
 253                 break;
 254
 255         case ISO_SUSP_CFLAG_HOST:
 256                 /* Inserting hostname i.e. "kurt.tools.de" */
 257                 inbuf = hostname;
 258                 wlen = hostnamelen;
 259                 break;
 260
 261         case ISO_SUSP_CFLAG_CONTINUE:
 262                 cont = 1;
 263                 /* fall thru */
 264         case 0:
 265                 /* Inserting component */
 266                 wlen = isonum_711(p->h.length) - 5;
 267                 inbuf = (char *)p + 5;
 268                 break;
 269
 270         default:
 271                 printf("RRIP with incorrect NM flags?\n");
 272                 wlen = ana->maxlen + 1;
 273                 break;
 274         }
 275
 276         if ((*ana->outlen += wlen) > ana->maxlen) {
 277                 /* treat as no name field */
 278                 ana->fields &= ~ISO_SUSP_ALTNAME;
 279                 ana->outbuf -= *ana->outlen - wlen;
 280                 *ana->outlen = 0;
 281                 return 0;
 282         }
 283
 284         bcopy(inbuf,ana->outbuf,wlen);
 285         ana->outbuf += wlen;
 286
 287         if (!cont) {
 288                 ana->fields &= ~ISO_SUSP_ALTNAME;
 289                 return ISO_SUSP_ALTNAME;
 290         }
 291         return 0;
 292 }
 293
 294 static void
 295 cd9660_rrip_defname(isodir,ana)
 296         struct iso_directory_record *isodir;
 297         ISO_RRIP_ANALYZE *ana;
 298 {
 299         strcpy(ana->outbuf,"..");
 300         switch (*isodir->name) {
 301         default:
 302                 isofntrans(isodir->name, isonum_711(isodir->name_len),
 303                            ana->outbuf, ana->outlen, 1);
 304                 break;
 305         case 0:
 306                 *ana->outlen = 1;
 307                 break;
 308         case 1:
 309                 *ana->outlen = 2;
 310                 break;
 311         }
 312 }
 313
 314 /*
 315  * Parent or Child Link
 316  */
 317 static int
 318 cd9660_rrip_pclink(p,ana)
 319         ISO_RRIP_CLINK  *p;
 320         ISO_RRIP_ANALYZE *ana;
 321 {
 322         *ana->inump = isonum_733(p->dir_loc) << ana->imp->im_bshift;
 323         ana->fields &= ~(ISO_SUSP_CLINK|ISO_SUSP_PLINK);
 324         return *p->h.type == 'C' ? ISO_SUSP_CLINK : ISO_SUSP_PLINK;
 325 }
 326
 327 /*
 328  * Relocated directory
 329  */
 330 static int
 331 cd9660_rrip_reldir(p,ana)
 332         ISO_RRIP_RELDIR  *p;
 333         ISO_RRIP_ANALYZE *ana;
 334 {
 335         /* special hack to make caller aware of RE field */
 336         *ana->outlen = 0;
 337         ana->fields = 0;
 338         return ISO_SUSP_RELDIR|ISO_SUSP_ALTNAME|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
 339 }
 340
 341 static int
 342 cd9660_rrip_tstamp(p,ana)
 343         ISO_RRIP_TSTAMP *p;
 344         ISO_RRIP_ANALYZE *ana;
 345 {
 346         u_char *ptime;
 347
 348         ptime = p->time;
 349
 350         /* Check a format of time stamp (7bytes/17bytes) */
 351         if (!(*p->flags&ISO_SUSP_TSTAMP_FORM17)) {
 352                 if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
 353                         ptime += 7;
 354
 355                 if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
 356                         cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_mtime);
 357                         ptime += 7;
 358                 } else
 359                         bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec));
 360
 361                 if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
 362                         cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_atime);
 363                         ptime += 7;
 364                 } else
 365                         ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
 366
 367                 if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
 368                         cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_ctime);
 369                 else
 370                         ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
 371
 372         } else {
 373                 if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
 374                         ptime += 17;
 375
 376                 if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
 377                         cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_mtime);
 378                         ptime += 17;
 379                 } else
 380                         bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec));
 381
 382                 if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
 383                         cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_atime);
 384                         ptime += 17;
 385                 } else
 386                         ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
 387
 388                 if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
 389                         cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_ctime);
 390                 else
 391                         ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
 392
 393         }
 394         ana->fields &= ~ISO_SUSP_TSTAMP;
 395         return ISO_SUSP_TSTAMP;
 396 }
 397
 398 static void
 399 cd9660_rrip_deftstamp(isodir,ana)
 400         struct iso_directory_record  *isodir;
 401         ISO_RRIP_ANALYZE *ana;
 402 {
 403         cd9660_deftstamp(isodir,ana->inop,NULL);
 404 }
 405
 406 /*
 407  * POSIX device modes
 408  */
 409 static int
 410 cd9660_rrip_device(p,ana)
 411         ISO_RRIP_DEVICE *p;
 412         ISO_RRIP_ANALYZE *ana;
 413 {
 414         u_int high, low;
 415
 416         high = isonum_733(p->dev_t_high);
 417         low  = isonum_733(p->dev_t_low);
 418
 419         if (high == 0)
 420                 ana->inop->inode.iso_rdev = makedev(major(low), minor(low));
 421         else
 422                 ana->inop->inode.iso_rdev = makedev(high, minor(low));
 423         ana->fields &= ~ISO_SUSP_DEVICE;
 424         return ISO_SUSP_DEVICE;
 425 }
 426
 427 /*
 428  * Flag indicating
 429  */
 430 static int
 431 cd9660_rrip_idflag(p,ana)
 432         ISO_RRIP_IDFLAG *p;
 433         ISO_RRIP_ANALYZE *ana;
 434 {
 435         ana->fields &= isonum_711(p->flags)|~0xff; /* don't touch high bits */
 436         /* special handling of RE field */
 437         if (ana->fields&ISO_SUSP_RELDIR)
 438                 return cd9660_rrip_reldir(p,ana);
 439
 440         return ISO_SUSP_IDFLAG;
 441 }
 442
 443 /*
 444  * Continuation pointer
 445  */
 446 static int
 447 cd9660_rrip_cont(p,ana)
 448         ISO_RRIP_CONT *p;
 449         ISO_RRIP_ANALYZE *ana;
 450 {
 451         ana->iso_ce_blk = isonum_733(p->location);
 452         ana->iso_ce_off = isonum_733(p->offset);
 453         ana->iso_ce_len = isonum_733(p->length);
 454         return ISO_SUSP_CONT;
 455 }
 456
 457 /*
 458  * System Use end
 459  */
 460 static int
 461 cd9660_rrip_stop(p,ana)
 462         ISO_SUSP_HEADER *p;
 463         ISO_RRIP_ANALYZE *ana;
 464 {
 465         return ISO_SUSP_STOP;
 466 }
 467
 468 /*
 469  * Extension reference
 470  */
 471 static int
 472 cd9660_rrip_extref(p,ana)
 473         ISO_RRIP_EXTREF *p;
 474         ISO_RRIP_ANALYZE *ana;
 475 {
 476         if (isonum_711(p->len_id) != 10
 477             || bcmp((char *)p + 8,"RRIP_1991A",10)
 478             || isonum_711(p->version) != 1)
 479                 return 0;
 480         ana->fields &= ~ISO_SUSP_EXTREF;
 481         return ISO_SUSP_EXTREF;
 482 }
 483
 484 typedef struct {
 485         char type[2];
 486         int (*func)();
 487         void (*func2)();
 488         int result;
 489 } RRIP_TABLE;
 490
 491 static int
 492 cd9660_rrip_loop(isodir,ana,table)
 493         struct iso_directory_record *isodir;
 494         ISO_RRIP_ANALYZE *ana;
 495         RRIP_TABLE *table;
 496 {
 497         register RRIP_TABLE *ptable;
 498         register ISO_SUSP_HEADER *phead;
 499         register ISO_SUSP_HEADER *pend;
 500         struct buf *bp = NULL;
 501         char *pwhead;
 502         int result;
 503
 504         /*
 505          * Note: If name length is odd,
 506          *       it will be padding 1 byte  after the name
 507          */
 508         pwhead = isodir->name + isonum_711(isodir->name_len);
 509         if (!(isonum_711(isodir->name_len)&1))
 510                 pwhead++;
 511
 512         /* If it's not the '.' entry of the root dir obey SP field */
 513         if (*isodir->name != 0
 514             || isonum_733(isodir->extent) != ana->imp->root_extent)
 515                 pwhead += ana->imp->rr_skip;
 516         else
 517                 pwhead += ana->imp->rr_skip0;
 518
 519         phead = (ISO_SUSP_HEADER *)pwhead;
 520         pend = (ISO_SUSP_HEADER *)((char *)isodir + isonum_711(isodir->length));
 521
 522         result = 0;
 523         while (1) {
 524                 ana->iso_ce_len = 0;
 525                 /*
 526                  * Note: "pend" should be more than one SUSP header
 527                  */
 528                 while (pend >= phead + 1) {
 529                         if (isonum_711(phead->version) == 1) {
 530                                 for (ptable = table; ptable->func; ptable++) {
 531                                         if (*phead->type == *ptable->type
 532                                             && phead->type[1] == ptable->type[1]) {
 533                                                 result |= ptable->func(phead,ana);
 534                                                 break;
 535                                         }
 536                                 }
 537                                 if (!ana->fields)
 538                                         break;
 539                         }
 540                         if (result&ISO_SUSP_STOP) {
 541                                 result &= ~ISO_SUSP_STOP;
 542                                 break;
 543                         }
 544                         /* plausibility check */
 545                         if (isonum_711(phead->length) < sizeof(*phead))
 546                                 break;
 547                         /*
 548                          * move to next SUSP
 549                          * Hopefully this works with newer versions, too
 550                          */
 551                         phead = (ISO_SUSP_HEADER *)((char *)phead + isonum_711(phead->length));
 552                 }
 553
 554                 if (ana->fields && ana->iso_ce_len) {
 555                         if (ana->iso_ce_blk >= ana->imp->volume_space_size
 556                             || ana->iso_ce_off + ana->iso_ce_len > ana->imp->logical_block_size
 557                             || bread(ana->imp->im_devvp,
 558 #if 1 // radar 1669467 - logical and physical blocksize are the same
 559                                      ana->iso_ce_blk,
 560 #else
 561                                      ana->iso_ce_blk << (ana->imp->im_bshift - DEV_BSHIFT),
 562 #endif // radar 1669467
 563                                      ana->imp->logical_block_size, NOCRED, &bp))
 564                                 /* what to do now? */
 565                                 break;
 566                         phead = (ISO_SUSP_HEADER *)(bp->b_data + ana->iso_ce_off);
 567                         pend = (ISO_SUSP_HEADER *) ((char *)phead + ana->iso_ce_len);
 568                 } else
 569                         break;
 570         }
 571         if (bp)
 572                 brelse(bp);
 573         /*
 574          * If we don't find the Basic SUSP stuffs, just set default value
 575          *   (attribute/time stamp)
 576          */
 577         for (ptable = table; ptable->func2; ptable++)
 578                 if (!(ptable->result&result))
 579                         ptable->func2(isodir,ana);
 580
 581         return result;
 582 }
 583
 584 /*
 585  * Get Attributes.
 586  */
 587 static RRIP_TABLE rrip_table_analyze[] = {
 588         { "PX", cd9660_rrip_attr,       cd9660_rrip_defattr,    ISO_SUSP_ATTR },
 589         { "TF", cd9660_rrip_tstamp,     cd9660_rrip_deftstamp,  ISO_SUSP_TSTAMP },
 590         { "PN", cd9660_rrip_device,     0,                      ISO_SUSP_DEVICE },
 591         { "RR", cd9660_rrip_idflag,     0,                      ISO_SUSP_IDFLAG },
 592         { "CE", cd9660_rrip_cont,       0,                      ISO_SUSP_CONT },
 593         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 594         { "",   0,                      0,                      0 }
 595 };
 596
 597 int
 598 cd9660_rrip_analyze(isodir,inop,imp)
 599         struct iso_directory_record *isodir;
 600         struct iso_node *inop;
 601         struct iso_mnt *imp;
 602 {
 603         ISO_RRIP_ANALYZE analyze;
 604
 605         analyze.inop = inop;
 606         analyze.imp = imp;
 607         analyze.fields = ISO_SUSP_ATTR|ISO_SUSP_TSTAMP|ISO_SUSP_DEVICE;
 608
 609         return cd9660_rrip_loop(isodir,&analyze,rrip_table_analyze);
 610 }
 611
 612 /*
 613  * Get Alternate Name.
 614  */
 615 static RRIP_TABLE rrip_table_getname[] = {
 616         { "NM", cd9660_rrip_altname,    cd9660_rrip_defname,    ISO_SUSP_ALTNAME },
 617         { "CL", cd9660_rrip_pclink,     0,                      ISO_SUSP_CLINK|ISO_SUSP_PLINK },
 618         { "PL", cd9660_rrip_pclink,     0,                      ISO_SUSP_CLINK|ISO_SUSP_PLINK },
 619         { "RE", cd9660_rrip_reldir,     0,                      ISO_SUSP_RELDIR },
 620         { "RR", cd9660_rrip_idflag,     0,                      ISO_SUSP_IDFLAG },
 621         { "CE", cd9660_rrip_cont,       0,                      ISO_SUSP_CONT },
 622         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 623         { "",   0,                      0,                      0 }
 624 };
 625
 626 int
 627 cd9660_rrip_getname(isodir,outbuf,outlen,inump,imp)
 628         struct iso_directory_record *isodir;
 629         char *outbuf;
 630         u_short *outlen;
 631         ino_t *inump;
 632         struct iso_mnt *imp;
 633 {
 634         ISO_RRIP_ANALYZE analyze;
 635         RRIP_TABLE *tab;
 636
 637         analyze.outbuf = outbuf;
 638         analyze.outlen = outlen;
 639         analyze.maxlen = ISO_RRIP_NAMEMAX;
 640         analyze.inump = inump;
 641         analyze.imp = imp;
 642         analyze.fields = ISO_SUSP_ALTNAME|ISO_SUSP_RELDIR|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
 643         *outlen = 0;
 644
 645         tab = rrip_table_getname;
 646         if (*isodir->name == 0
 647             || *isodir->name == 1) {
 648                 cd9660_rrip_defname(isodir,&analyze);
 649
 650                 analyze.fields &= ~ISO_SUSP_ALTNAME;
 651                 tab++;
 652         }
 653
 654         return cd9660_rrip_loop(isodir,&analyze,tab);
 655 }
 656
 657 /*
 658  * Get Symbolic Link.
 659  */
 660 static RRIP_TABLE rrip_table_getsymname[] = {
 661         { "SL", cd9660_rrip_slink,      0,                      ISO_SUSP_SLINK },
 662         { "RR", cd9660_rrip_idflag,     0,                      ISO_SUSP_IDFLAG },
 663         { "CE", cd9660_rrip_cont,       0,                      ISO_SUSP_CONT },
 664         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 665         { "",   0,                      0,                      0 }
 666 };
 667
 668 int
 669 cd9660_rrip_getsymname(isodir,outbuf,outlen,imp)
 670         struct iso_directory_record *isodir;
 671         char *outbuf;
 672         u_short *outlen;
 673         struct iso_mnt *imp;
 674 {
 675         ISO_RRIP_ANALYZE analyze;
 676
 677         analyze.outbuf = outbuf;
 678         analyze.outlen = outlen;
 679         *outlen = 0;
 680         analyze.maxlen = MAXPATHLEN;
 681         analyze.cont = 1;               /* don't start with a slash */
 682         analyze.imp = imp;
 683         analyze.fields = ISO_SUSP_SLINK;
 684
 685         return (cd9660_rrip_loop(isodir,&analyze,rrip_table_getsymname)&ISO_SUSP_SLINK);
 686 }
 687
 688 static RRIP_TABLE rrip_table_extref[] = {
 689         { "ER", cd9660_rrip_extref,     0,                      ISO_SUSP_EXTREF },
 690         { "CE", cd9660_rrip_cont,       0,                      ISO_SUSP_CONT },
 691         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 692         { "",   0,                      0,                      0 }
 693 };
 694
 695 /*
 696  * Check for Rock Ridge Extension and return offset of its fields.
 697  * Note: We insist on the ER field.
 698  */
 699 int
 700 cd9660_rrip_offset(isodir,imp)
 701         struct iso_directory_record *isodir;
 702         struct iso_mnt *imp;
 703 {
 704         ISO_RRIP_OFFSET *p;
 705         ISO_RRIP_ANALYZE analyze;
 706
 707         imp->rr_skip0 = 0;
 708         p = (ISO_RRIP_OFFSET *)(isodir->name + 1);
 709         if (bcmp(p,"SP\7\1\276\357",6)) {
 710                 /* Maybe, it's a CDROM XA disc? */
 711                 imp->rr_skip0 = 15;
 712                 p = (ISO_RRIP_OFFSET *)((char *)p + 15);
 713                 if (bcmp(p,"SP\7\1\276\357",6))
 714                         return -1;
 715         }
 716
 717         analyze.imp = imp;
 718         analyze.fields = ISO_SUSP_EXTREF;
 719         if (!(cd9660_rrip_loop(isodir,&analyze,rrip_table_extref)&ISO_SUSP_EXTREF))
 720                 return -1;
 721
 722         return isonum_711(p->skip);
 723 }