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  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*      $NetBSD: cd9660_rrip.c,v 1.11 1994/12/24 15:30:10 cgd Exp $     */
  23
  24 /*-
  25  * Copyright (c) 1993, 1994
  26  *      The Regents of the University of California.  All rights reserved.
  27  *
  28  * This code is derived from software contributed to Berkeley
  29  * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
  30  * Support code is derived from software contributed to Berkeley
  31  * by Atsushi Murai (amurai@spec.co.jp).
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)cd9660_rrip.c       8.6 (Berkeley) 12/5/94
  62
  63
  64
  65  * HISTORY
  66  * 22-Jan-98    radar 1669467 - ISO 9660 CD support - jwc
  67
  68  */
  69
  70 #include <sys/param.h>
  71 #include <sys/systm.h>
  72 #include <sys/vnode.h>
  73 #include <sys/mount.h>
  74 #include <sys/namei.h>
  75 #include <sys/buf.h>
  76 #include <sys/file.h>
  77 #include <sys/kernel.h>
  78 #include <sys/stat.h>
  79 #include <sys/types.h>
  80
  81 #include <sys/time.h>
  82
  83 #include <isofs/cd9660/iso.h>
  84 #include <isofs/cd9660/cd9660_node.h>
  85 #include <isofs/cd9660/cd9660_rrip.h>
  86 #include <isofs/cd9660/iso_rrip.h>
  87
  88 /*
  89  * POSIX file attribute
  90  */
  91 static int
  92 cd9660_rrip_attr(p,ana)
  93         ISO_RRIP_ATTR *p;
  94         ISO_RRIP_ANALYZE *ana;
  95 {
  96         ana->inop->inode.iso_mode = isonum_733(p->mode);
  97         ana->inop->inode.iso_uid = isonum_733(p->uid);
  98         ana->inop->inode.iso_gid = isonum_733(p->gid);
  99         ana->inop->inode.iso_links = isonum_733(p->links);
 100         ana->fields &= ~ISO_SUSP_ATTR;
 101         return ISO_SUSP_ATTR;
 102 }
 103
 104 static void
 105 cd9660_rrip_defattr(isodir,ana)
 106         struct iso_directory_record *isodir;
 107         ISO_RRIP_ANALYZE *ana;
 108 {
 109         /* But this is a required field! */
 110         printf("RRIP without PX field?\n");
 111         cd9660_defattr(isodir,ana->inop,NULL);
 112 }
 113
 114 /*
 115  * Symbolic Links
 116  */
 117 static int
 118 cd9660_rrip_slink(p,ana)
 119         ISO_RRIP_SLINK  *p;
 120         ISO_RRIP_ANALYZE *ana;
 121 {
 122         register ISO_RRIP_SLINK_COMPONENT *pcomp;
 123         register ISO_RRIP_SLINK_COMPONENT *pcompe;
 124         int len, wlen, cont;
 125         char *outbuf, *inbuf;
 126
 127         pcomp = (ISO_RRIP_SLINK_COMPONENT *)p->component;
 128         pcompe = (ISO_RRIP_SLINK_COMPONENT *)((char *)p + isonum_711(p->h.length));
 129         len = *ana->outlen;
 130         outbuf = ana->outbuf;
 131         cont = ana->cont;
 132
 133         /*
 134          * Gathering a Symbolic name from each component with path
 135          */
 136         for (;
 137              pcomp < pcompe;
 138              pcomp = (ISO_RRIP_SLINK_COMPONENT *)((char *)pcomp + ISO_RRIP_SLSIZ
 139                                                   + isonum_711(pcomp->clen))) {
 140
 141                 if (!cont) {
 142                         if (len < ana->maxlen) {
 143                                 len++;
 144                                 *outbuf++ = '/';
 145                         }
 146                 }
 147                 cont = 0;
 148
 149                 inbuf = "..";
 150                 wlen = 0;
 151
 152                 switch (*pcomp->cflag) {
 153
 154                 case ISO_SUSP_CFLAG_CURRENT:
 155                         /* Inserting Current */
 156                         wlen = 1;
 157                         break;
 158
 159                 case ISO_SUSP_CFLAG_PARENT:
 160                         /* Inserting Parent */
 161                         wlen = 2;
 162                         break;
 163
 164                 case ISO_SUSP_CFLAG_ROOT:
 165                         /* Inserting slash for ROOT */
 166                         /* start over from beginning(?) */
 167                         outbuf -= len;
 168                         len = 0;
 169                         break;
 170
 171                 case ISO_SUSP_CFLAG_VOLROOT:
 172                         /* Inserting a mount point i.e. "/cdrom" */
 173                         /* same as above */
 174                         outbuf -= len;
 175                         len = 0;
 176                         inbuf = ana->imp->im_mountp->mnt_stat.f_mntonname;
 177                         wlen = strlen(inbuf);
 178                         break;
 179
 180                 case ISO_SUSP_CFLAG_HOST:
 181                         /* Inserting hostname i.e. "kurt.tools.de" */
 182                         inbuf = hostname;
 183                         wlen = hostnamelen;
 184                         break;
 185
 186                 case ISO_SUSP_CFLAG_CONTINUE:
 187                         cont = 1;
 188                         /* fall thru */
 189                 case 0:
 190                         /* Inserting component */
 191                         wlen = isonum_711(pcomp->clen);
 192                         inbuf = pcomp->name;
 193                         break;
 194                 default:
 195                         printf("RRIP with incorrect flags?");
 196                         wlen = ana->maxlen + 1;
 197                         break;
 198                 }
 199
 200                 if (len + wlen > ana->maxlen) {
 201                         /* indicate error to caller */
 202                         ana->cont = 1;
 203                         ana->fields = 0;
 204                         ana->outbuf -= *ana->outlen;
 205                         *ana->outlen = 0;
 206                         return 0;
 207                 }
 208
 209                 bcopy(inbuf,outbuf,wlen);
 210                 outbuf += wlen;
 211                 len += wlen;
 212
 213         }
 214         ana->outbuf = outbuf;
 215         *ana->outlen = len;
 216         ana->cont = cont;
 217
 218         if (!isonum_711(p->flags)) {
 219                 ana->fields &= ~ISO_SUSP_SLINK;
 220                 return ISO_SUSP_SLINK;
 221         }
 222         return 0;
 223 }
 224
 225 /*
 226  * Alternate name
 227  */
 228 static int
 229 cd9660_rrip_altname(p,ana)
 230         ISO_RRIP_ALTNAME *p;
 231         ISO_RRIP_ANALYZE *ana;
 232 {
 233         char *inbuf;
 234         int wlen;
 235         int cont;
 236
 237         inbuf = "..";
 238         wlen = 0;
 239         cont = 0;
 240
 241         switch (*p->flags) {
 242         case ISO_SUSP_CFLAG_CURRENT:
 243                 /* Inserting Current */
 244                 wlen = 1;
 245                 break;
 246
 247         case ISO_SUSP_CFLAG_PARENT:
 248                 /* Inserting Parent */
 249                 wlen = 2;
 250                 break;
 251
 252         case ISO_SUSP_CFLAG_HOST:
 253                 /* Inserting hostname i.e. "kurt.tools.de" */
 254                 inbuf = hostname;
 255                 wlen = hostnamelen;
 256                 break;
 257
 258         case ISO_SUSP_CFLAG_CONTINUE:
 259                 cont = 1;
 260                 /* fall thru */
 261         case 0:
 262                 /* Inserting component */
 263                 wlen = isonum_711(p->h.length) - 5;
 264                 inbuf = (char *)p + 5;
 265                 break;
 266
 267         default:
 268                 printf("RRIP with incorrect NM flags?\n");
 269                 wlen = ana->maxlen + 1;
 270                 break;
 271         }
 272
 273         if ((*ana->outlen += wlen) > ana->maxlen) {
 274                 /* treat as no name field */
 275                 ana->fields &= ~ISO_SUSP_ALTNAME;
 276                 ana->outbuf -= *ana->outlen - wlen;
 277                 *ana->outlen = 0;
 278                 return 0;
 279         }
 280
 281         bcopy(inbuf,ana->outbuf,wlen);
 282         ana->outbuf += wlen;
 283
 284         if (!cont) {
 285                 ana->fields &= ~ISO_SUSP_ALTNAME;
 286                 return ISO_SUSP_ALTNAME;
 287         }
 288         return 0;
 289 }
 290
 291 static void
 292 cd9660_rrip_defname(isodir,ana)
 293         struct iso_directory_record *isodir;
 294         ISO_RRIP_ANALYZE *ana;
 295 {
 296         strcpy(ana->outbuf,"..");
 297         switch (*isodir->name) {
 298         default:
 299                 isofntrans(isodir->name, isonum_711(isodir->name_len),
 300                            ana->outbuf, ana->outlen, 1,
 301                            isonum_711(isodir->flags) & associatedBit);
 302                 break;
 303         case 0:
 304                 *ana->outlen = 1;
 305                 break;
 306         case 1:
 307                 *ana->outlen = 2;
 308                 break;
 309         }
 310 }
 311
 312 /*
 313  * Parent or Child Link
 314  */
 315 static int
 316 cd9660_rrip_pclink(p,ana)
 317         ISO_RRIP_CLINK  *p;
 318         ISO_RRIP_ANALYZE *ana;
 319 {
 320         *ana->inump = isonum_733(p->dir_loc) << ana->imp->im_bshift;
 321         ana->fields &= ~(ISO_SUSP_CLINK|ISO_SUSP_PLINK);
 322         return *p->h.type == 'C' ? ISO_SUSP_CLINK : ISO_SUSP_PLINK;
 323 }
 324
 325 /*
 326  * Relocated directory
 327  */
 328 static int
 329 cd9660_rrip_reldir(p,ana)
 330         ISO_RRIP_RELDIR  *p;
 331         ISO_RRIP_ANALYZE *ana;
 332 {
 333         /* special hack to make caller aware of RE field */
 334         *ana->outlen = 0;
 335         ana->fields = 0;
 336         return ISO_SUSP_RELDIR|ISO_SUSP_ALTNAME|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
 337 }
 338
 339 static int
 340 cd9660_rrip_tstamp(p,ana)
 341         ISO_RRIP_TSTAMP *p;
 342         ISO_RRIP_ANALYZE *ana;
 343 {
 344         u_char *ptime;
 345
 346         ptime = p->time;
 347
 348         /* Check a format of time stamp (7bytes/17bytes) */
 349         if (!(*p->flags&ISO_SUSP_TSTAMP_FORM17)) {
 350                 if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
 351                         ptime += 7;
 352
 353                 if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
 354                         cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_mtime);
 355                         ptime += 7;
 356                 } else
 357                         bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec));
 358
 359                 if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
 360                         cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_atime);
 361                         ptime += 7;
 362                 } else
 363                         ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
 364
 365                 if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
 366                         cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_ctime);
 367                 else
 368                         ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
 369
 370         } else {
 371                 if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
 372                         ptime += 17;
 373
 374                 if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
 375                         cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_mtime);
 376                         ptime += 17;
 377                 } else
 378                         bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec));
 379
 380                 if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
 381                         cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_atime);
 382                         ptime += 17;
 383                 } else
 384                         ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
 385
 386                 if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
 387                         cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_ctime);
 388                 else
 389                         ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
 390
 391         }
 392         ana->fields &= ~ISO_SUSP_TSTAMP;
 393         return ISO_SUSP_TSTAMP;
 394 }
 395
 396 static void
 397 cd9660_rrip_deftstamp(isodir,ana)
 398         struct iso_directory_record  *isodir;
 399         ISO_RRIP_ANALYZE *ana;
 400 {
 401         cd9660_deftstamp(isodir,ana->inop,NULL);
 402 }
 403
 404 /*
 405  * POSIX device modes
 406  */
 407 static int
 408 cd9660_rrip_device(p,ana)
 409         ISO_RRIP_DEVICE *p;
 410         ISO_RRIP_ANALYZE *ana;
 411 {
 412         u_int high, low;
 413
 414         high = isonum_733(p->dev_t_high);
 415         low  = isonum_733(p->dev_t_low);
 416
 417         if (high == 0)
 418                 ana->inop->inode.iso_rdev = makedev(major(low), minor(low));
 419         else
 420                 ana->inop->inode.iso_rdev = makedev(high, minor(low));
 421         ana->fields &= ~ISO_SUSP_DEVICE;
 422         return ISO_SUSP_DEVICE;
 423 }
 424
 425 /*
 426  * Flag indicating
 427  */
 428 static int
 429 cd9660_rrip_idflag(p,ana)
 430         ISO_RRIP_IDFLAG *p;
 431         ISO_RRIP_ANALYZE *ana;
 432 {
 433         ana->fields &= isonum_711(p->flags)|~0xff; /* don't touch high bits */
 434         /* special handling of RE field */
 435         if (ana->fields&ISO_SUSP_RELDIR)
 436                 return cd9660_rrip_reldir(p,ana);
 437
 438         return ISO_SUSP_IDFLAG;
 439 }
 440
 441 /*
 442  * Continuation pointer
 443  */
 444 static int
 445 cd9660_rrip_cont(p,ana)
 446         ISO_RRIP_CONT *p;
 447         ISO_RRIP_ANALYZE *ana;
 448 {
 449         ana->iso_ce_blk = isonum_733(p->location);
 450         ana->iso_ce_off = isonum_733(p->offset);
 451         ana->iso_ce_len = isonum_733(p->length);
 452         return ISO_SUSP_CONT;
 453 }
 454
 455 /*
 456  * System Use end
 457  */
 458 static int
 459 cd9660_rrip_stop(p,ana)
 460         ISO_SUSP_HEADER *p;
 461         ISO_RRIP_ANALYZE *ana;
 462 {
 463         return ISO_SUSP_STOP;
 464 }
 465
 466 /*
 467  * Extension reference
 468  */
 469 static int
 470 cd9660_rrip_extref(p,ana)
 471         ISO_RRIP_EXTREF *p;
 472         ISO_RRIP_ANALYZE *ana;
 473 {
 474         if (isonum_711(p->len_id) != 10
 475             || bcmp((char *)p + 8,"RRIP_1991A",10)
 476             || isonum_711(p->version) != 1)
 477                 return 0;
 478         ana->fields &= ~ISO_SUSP_EXTREF;
 479         return ISO_SUSP_EXTREF;
 480 }
 481
 482 typedef struct {
 483         char type[2];
 484         int (*func)();
 485         void (*func2)();
 486         int result;
 487 } RRIP_TABLE;
 488
 489 static int
 490 cd9660_rrip_loop(isodir,ana,table)
 491         struct iso_directory_record *isodir;
 492         ISO_RRIP_ANALYZE *ana;
 493         RRIP_TABLE *table;
 494 {
 495         register RRIP_TABLE *ptable;
 496         register ISO_SUSP_HEADER *phead;
 497         register ISO_SUSP_HEADER *pend;
 498         struct buf *bp = NULL;
 499         char *pwhead;
 500         int result;
 501
 502         /*
 503          * Note: If name length is odd,
 504          *       it will be padding 1 byte  after the name
 505          */
 506         pwhead = isodir->name + isonum_711(isodir->name_len);
 507         if (!(isonum_711(isodir->name_len)&1))
 508                 pwhead++;
 509
 510         /* If it's not the '.' entry of the root dir obey SP field */
 511         if (*isodir->name != 0
 512             || isonum_733(isodir->extent) != ana->imp->root_extent)
 513                 pwhead += ana->imp->rr_skip;
 514         else
 515                 pwhead += ana->imp->rr_skip0;
 516
 517         phead = (ISO_SUSP_HEADER *)pwhead;
 518         pend = (ISO_SUSP_HEADER *)((char *)isodir + isonum_711(isodir->length));
 519
 520         result = 0;
 521         while (1) {
 522                 ana->iso_ce_len = 0;
 523                 /*
 524                  * Note: "pend" should be more than one SUSP header
 525                  */
 526                 while (pend >= phead + 1) {
 527                         if (isonum_711(phead->version) == 1) {
 528                                 for (ptable = table; ptable->func; ptable++) {
 529                                         if (*phead->type == *ptable->type
 530                                             && phead->type[1] == ptable->type[1]) {
 531                                                 result |= ptable->func(phead,ana);
 532                                                 break;
 533                                         }
 534                                 }
 535                                 if (!ana->fields)
 536                                         break;
 537                         }
 538                         if (result&ISO_SUSP_STOP) {
 539                                 result &= ~ISO_SUSP_STOP;
 540                                 break;
 541                         }
 542                         /* plausibility check */
 543                         if (isonum_711(phead->length) < sizeof(*phead))
 544                                 break;
 545                         /*
 546                          * move to next SUSP
 547                          * Hopefully this works with newer versions, too
 548                          */
 549                         phead = (ISO_SUSP_HEADER *)((char *)phead + isonum_711(phead->length));
 550                 }
 551
 552                 if (ana->fields && ana->iso_ce_len) {
 553                         if (ana->iso_ce_blk >= ana->imp->volume_space_size
 554                             || ana->iso_ce_off + ana->iso_ce_len > ana->imp->logical_block_size
 555                             || bread(ana->imp->im_devvp,
 556 #if 1 // radar 1669467 - logical and physical blocksize are the same
 557                                      ana->iso_ce_blk,
 558 #else
 559                                      ana->iso_ce_blk << (ana->imp->im_bshift - DEV_BSHIFT),
 560 #endif // radar 1669467
 561                                      ana->imp->logical_block_size, NOCRED, &bp))
 562                                 /* what to do now? */
 563                                 break;
 564                         phead = (ISO_SUSP_HEADER *)(bp->b_data + ana->iso_ce_off);
 565                         pend = (ISO_SUSP_HEADER *) ((char *)phead + ana->iso_ce_len);
 566                 } else
 567                         break;
 568         }
 569         if (bp)
 570                 brelse(bp);
 571         /*
 572          * If we don't find the Basic SUSP stuffs, just set default value
 573          *   (attribute/time stamp)
 574          */
 575         for (ptable = table; ptable->func2; ptable++)
 576                 if (!(ptable->result&result))
 577                         ptable->func2(isodir,ana);
 578
 579         return result;
 580 }
 581
 582 /*
 583  * Get Attributes.
 584  */
 585 static RRIP_TABLE rrip_table_analyze[] = {
 586         { "PX", cd9660_rrip_attr,       cd9660_rrip_defattr,    ISO_SUSP_ATTR },
 587         { "TF", cd9660_rrip_tstamp,     cd9660_rrip_deftstamp,  ISO_SUSP_TSTAMP },
 588         { "PN", cd9660_rrip_device,     0,                      ISO_SUSP_DEVICE },
 589         { "RR", cd9660_rrip_idflag,     0,                      ISO_SUSP_IDFLAG },
 590         { "CE", cd9660_rrip_cont,       0,                      ISO_SUSP_CONT },
 591         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 592         { "",   0,                      0,                      0 }
 593 };
 594
 595 int
 596 cd9660_rrip_analyze(isodir,inop,imp)
 597         struct iso_directory_record *isodir;
 598         struct iso_node *inop;
 599         struct iso_mnt *imp;
 600 {
 601         ISO_RRIP_ANALYZE analyze;
 602
 603         analyze.inop = inop;
 604         analyze.imp = imp;
 605         analyze.fields = ISO_SUSP_ATTR|ISO_SUSP_TSTAMP|ISO_SUSP_DEVICE;
 606
 607         return cd9660_rrip_loop(isodir,&analyze,rrip_table_analyze);
 608 }
 609
 610 /*
 611  * Get Alternate Name.
 612  */
 613 static RRIP_TABLE rrip_table_getname[] = {
 614         { "NM", cd9660_rrip_altname,    cd9660_rrip_defname,    ISO_SUSP_ALTNAME },
 615         { "CL", cd9660_rrip_pclink,     0,                      ISO_SUSP_CLINK|ISO_SUSP_PLINK },
 616         { "PL", cd9660_rrip_pclink,     0,                      ISO_SUSP_CLINK|ISO_SUSP_PLINK },
 617         { "RE", cd9660_rrip_reldir,     0,                      ISO_SUSP_RELDIR },
 618         { "RR", cd9660_rrip_idflag,     0,                      ISO_SUSP_IDFLAG },
 619         { "CE", cd9660_rrip_cont,       0,                      ISO_SUSP_CONT },
 620         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 621         { "",   0,                      0,                      0 }
 622 };
 623
 624 int
 625 cd9660_rrip_getname(isodir,outbuf,outlen,inump,imp)
 626         struct iso_directory_record *isodir;
 627         char *outbuf;
 628         u_short *outlen;
 629         ino_t *inump;
 630         struct iso_mnt *imp;
 631 {
 632         ISO_RRIP_ANALYZE analyze;
 633         RRIP_TABLE *tab;
 634
 635         analyze.outbuf = outbuf;
 636         analyze.outlen = outlen;
 637         analyze.maxlen = ISO_RRIP_NAMEMAX;
 638         analyze.inump = inump;
 639         analyze.imp = imp;
 640         analyze.fields = ISO_SUSP_ALTNAME|ISO_SUSP_RELDIR|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
 641         *outlen = 0;
 642
 643         tab = rrip_table_getname;
 644         if (*isodir->name == 0
 645             || *isodir->name == 1) {
 646                 cd9660_rrip_defname(isodir,&analyze);
 647
 648                 analyze.fields &= ~ISO_SUSP_ALTNAME;
 649                 tab++;
 650         }
 651
 652         return cd9660_rrip_loop(isodir,&analyze,tab);
 653 }
 654
 655 /*
 656  * Get Symbolic Link.
 657  */
 658 static RRIP_TABLE rrip_table_getsymname[] = {
 659         { "SL", cd9660_rrip_slink,      0,                      ISO_SUSP_SLINK },
 660         { "RR", cd9660_rrip_idflag,     0,                      ISO_SUSP_IDFLAG },
 661         { "CE", cd9660_rrip_cont,       0,                      ISO_SUSP_CONT },
 662         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 663         { "",   0,                      0,                      0 }
 664 };
 665
 666 int
 667 cd9660_rrip_getsymname(isodir,outbuf,outlen,imp)
 668         struct iso_directory_record *isodir;
 669         char *outbuf;
 670         u_short *outlen;
 671         struct iso_mnt *imp;
 672 {
 673         ISO_RRIP_ANALYZE analyze;
 674
 675         analyze.outbuf = outbuf;
 676         analyze.outlen = outlen;
 677         *outlen = 0;
 678         analyze.maxlen = MAXPATHLEN;
 679         analyze.cont = 1;               /* don't start with a slash */
 680         analyze.imp = imp;
 681         analyze.fields = ISO_SUSP_SLINK;
 682
 683         return (cd9660_rrip_loop(isodir,&analyze,rrip_table_getsymname)&ISO_SUSP_SLINK);
 684 }
 685
 686 static RRIP_TABLE rrip_table_extref[] = {
 687         { "ER", cd9660_rrip_extref,     0,                      ISO_SUSP_EXTREF },
 688         { "CE", cd9660_rrip_cont,       0,                      ISO_SUSP_CONT },
 689         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 690         { "",   0,                      0,                      0 }
 691 };
 692
 693 /*
 694  * Check for Rock Ridge Extension and return offset of its fields.
 695  * Note: We insist on the ER field.
 696  */
 697 int
 698 cd9660_rrip_offset(isodir,imp)
 699         struct iso_directory_record *isodir;
 700         struct iso_mnt *imp;
 701 {
 702         ISO_RRIP_OFFSET *p;
 703         ISO_RRIP_ANALYZE analyze;
 704
 705         imp->rr_skip0 = 0;
 706         p = (ISO_RRIP_OFFSET *)(isodir->name + 1);
 707         if (bcmp(p,"SP\7\1\276\357",6)) {
 708                 /* Maybe, it's a CDROM XA disc? */
 709                 imp->rr_skip0 = 15;
 710                 p = (ISO_RRIP_OFFSET *)((char *)p + 15);
 711                 if (bcmp(p,"SP\7\1\276\357",6))
 712                         return -1;
 713         }
 714
 715         analyze.imp = imp;
 716         analyze.fields = ISO_SUSP_EXTREF;
 717         if (!(cd9660_rrip_loop(isodir,&analyze,rrip_table_extref)&ISO_SUSP_EXTREF))
 718                 return -1;
 719
 720         return isonum_711(p->skip);
 721 }