bsd/isofs/cd9660/cd9660_rrip.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*      $NetBSD: cd9660_rrip.c,v 1.11 1994/12/24 15:30:10 cgd Exp $     */
  29
  30 /*-
  31  * Copyright (c) 1993, 1994
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * This code is derived from software contributed to Berkeley
  35  * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
  36  * Support code is derived from software contributed to Berkeley
  37  * by Atsushi Murai (amurai@spec.co.jp).
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 3. All advertising materials mentioning features or use of this software
  48  *    must display the following acknowledgement:
  49  *      This product includes software developed by the University of
  50  *      California, Berkeley and its contributors.
  51  * 4. Neither the name of the University nor the names of its contributors
  52  *    may be used to endorse or promote products derived from this software
  53  *    without specific prior written permission.
  54  *
  55  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  56  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  57  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  58  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  59  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  60  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  61  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  62  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  63  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  64  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  65  * SUCH DAMAGE.
  66  *
  67  *      @(#)cd9660_rrip.c       8.6 (Berkeley) 12/5/94
  68
  69
  70
  71  * HISTORY
  72  * 22-Jan-98    radar 1669467 - ISO 9660 CD support - jwc
  73
  74  */
  75
  76 #include <sys/param.h>
  77 #include <sys/systm.h>
  78 #include <sys/vnode.h>
  79 #include <sys/mount.h>
  80 #include <sys/namei.h>
  81 #include <sys/buf.h>
  82 #include <sys/file.h>
  83 #include <sys/kernel.h>
  84 #include <sys/stat.h>
  85 #include <sys/types.h>
  86
  87 #include <sys/time.h>
  88
  89 #include <isofs/cd9660/iso.h>
  90 #include <isofs/cd9660/cd9660_node.h>
  91 #include <isofs/cd9660/cd9660_rrip.h>
  92 #include <isofs/cd9660/iso_rrip.h>
  93
  94 /*
  95  * POSIX file attribute
  96  */
  97 static int
  98 cd9660_rrip_attr(ISO_RRIP_ATTR *p, ISO_RRIP_ANALYZE *ana)
  99 {
 100         ana->inop->inode.iso_mode = isonum_733(p->mode);
 101         ana->inop->inode.iso_uid = isonum_733(p->uid);
 102         ana->inop->inode.iso_gid = isonum_733(p->gid);
 103         ana->inop->inode.iso_links = isonum_733(p->links);
 104         ana->fields &= ~ISO_SUSP_ATTR;
 105         return ISO_SUSP_ATTR;
 106 }
 107
 108 static void
 109 cd9660_rrip_defattr(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana)
 110 {
 111         /* But this is a required field! */
 112         printf("RRIP without PX field?\n");
 113         cd9660_defattr(isodir,ana->inop,NULL);
 114 }
 115
 116 /*
 117  * Symbolic Links
 118  */
 119 static int
 120 cd9660_rrip_slink(ISO_RRIP_SLINK *p, 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 = &(vfs_statfs(ana->imp->im_mountp)->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(ISO_RRIP_ALTNAME *p, ISO_RRIP_ANALYZE *ana)
 230 {
 231         char *inbuf;
 232         int wlen;
 233         int cont;
 234
 235         inbuf = "..";
 236         wlen = 0;
 237         cont = 0;
 238
 239         switch (*p->flags) {
 240         case ISO_SUSP_CFLAG_CURRENT:
 241                 /* Inserting Current */
 242                 wlen = 1;
 243                 break;
 244
 245         case ISO_SUSP_CFLAG_PARENT:
 246                 /* Inserting Parent */
 247                 wlen = 2;
 248                 break;
 249
 250         case ISO_SUSP_CFLAG_HOST:
 251                 /* Inserting hostname i.e. "kurt.tools.de" */
 252                 inbuf = hostname;
 253                 wlen = hostnamelen;
 254                 break;
 255
 256         case ISO_SUSP_CFLAG_CONTINUE:
 257                 cont = 1;
 258                 /* fall thru */
 259         case 0:
 260                 /* Inserting component */
 261                 wlen = isonum_711(p->h.length) - 5;
 262                 inbuf = (char *)p + 5;
 263                 break;
 264
 265         default:
 266                 printf("RRIP with incorrect NM flags?\n");
 267                 wlen = ana->maxlen + 1;
 268                 break;
 269         }
 270
 271         if ((*ana->outlen += wlen) > ana->maxlen) {
 272                 /* treat as no name field */
 273                 ana->fields &= ~ISO_SUSP_ALTNAME;
 274                 ana->outbuf -= *ana->outlen - wlen;
 275                 *ana->outlen = 0;
 276                 return 0;
 277         }
 278
 279         bcopy(inbuf,ana->outbuf,wlen);
 280         ana->outbuf += wlen;
 281
 282         if (!cont) {
 283                 ana->fields &= ~ISO_SUSP_ALTNAME;
 284                 return ISO_SUSP_ALTNAME;
 285         }
 286         return 0;
 287 }
 288
 289 static void
 290 cd9660_rrip_defname(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana)
 291 {
 292         strcpy(ana->outbuf,"..");
 293         switch (*isodir->name) {
 294         default:
 295                 isofntrans(isodir->name, isonum_711(isodir->name_len),
 296                            ana->outbuf, ana->outlen, 1,
 297                            isonum_711(isodir->flags) & associatedBit);
 298                 break;
 299         case 0:
 300                 *ana->outlen = 1;
 301                 break;
 302         case 1:
 303                 *ana->outlen = 2;
 304                 break;
 305         }
 306 }
 307
 308 /*
 309  * Parent or Child Link
 310  */
 311 static int
 312 cd9660_rrip_pclink(ISO_RRIP_CLINK *p, ISO_RRIP_ANALYZE *ana)
 313 {
 314         *ana->inump = isonum_733(p->dir_loc) << ana->imp->im_bshift;
 315         ana->fields &= ~(ISO_SUSP_CLINK|ISO_SUSP_PLINK);
 316         return *p->h.type == 'C' ? ISO_SUSP_CLINK : ISO_SUSP_PLINK;
 317 }
 318
 319 /*
 320  * Relocated directory
 321  */
 322 /* ARGSUSED */
 323 static int
 324 cd9660_rrip_reldir(__unused ISO_RRIP_RELDIR *p, ISO_RRIP_ANALYZE *ana)
 325 {
 326         /* special hack to make caller aware of RE field */
 327         *ana->outlen = 0;
 328         ana->fields = 0;
 329         return ISO_SUSP_RELDIR|ISO_SUSP_ALTNAME|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
 330 }
 331
 332 static int
 333 cd9660_rrip_tstamp(ISO_RRIP_TSTAMP *p, ISO_RRIP_ANALYZE *ana)
 334 {
 335         u_char *ptime;
 336
 337         ptime = p->time;
 338
 339         /* Check a format of time stamp (7bytes/17bytes) */
 340         if (!(*p->flags&ISO_SUSP_TSTAMP_FORM17)) {
 341                 if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
 342                         ptime += 7;
 343
 344                 if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
 345                         cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_mtime);
 346                         ptime += 7;
 347                 } else
 348                         bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec));
 349
 350                 if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
 351                         cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_atime);
 352                         ptime += 7;
 353                 } else
 354                         ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
 355
 356                 if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
 357                         cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_ctime);
 358                 else
 359                         ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
 360
 361         } else {
 362                 if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
 363                         ptime += 17;
 364
 365                 if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
 366                         cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_mtime);
 367                         ptime += 17;
 368                 } else
 369                         bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec));
 370
 371                 if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
 372                         cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_atime);
 373                         ptime += 17;
 374                 } else
 375                         ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
 376
 377                 if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
 378                         cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_ctime);
 379                 else
 380                         ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
 381
 382         }
 383         ana->fields &= ~ISO_SUSP_TSTAMP;
 384         return ISO_SUSP_TSTAMP;
 385 }
 386
 387 static void
 388 cd9660_rrip_deftstamp(struct iso_directory_record *isodir,
 389                         ISO_RRIP_ANALYZE *ana)
 390 {
 391         cd9660_deftstamp(isodir,ana->inop,NULL);
 392 }
 393
 394 /*
 395  * POSIX device modes
 396  */
 397 static int
 398 cd9660_rrip_device(ISO_RRIP_DEVICE *p, ISO_RRIP_ANALYZE *ana)
 399 {
 400         u_int high, low;
 401
 402         high = isonum_733(p->dev_t_high);
 403         low  = isonum_733(p->dev_t_low);
 404
 405         if (high == 0)
 406                 ana->inop->inode.iso_rdev = makedev(major(low), minor(low));
 407         else
 408                 ana->inop->inode.iso_rdev = makedev(high, minor(low));
 409         ana->fields &= ~ISO_SUSP_DEVICE;
 410         return ISO_SUSP_DEVICE;
 411 }
 412
 413 /*
 414  * Flag indicating
 415  */
 416 static int
 417 cd9660_rrip_idflag(ISO_RRIP_IDFLAG *p, ISO_RRIP_ANALYZE *ana)
 418 {
 419         ana->fields &= isonum_711(p->flags)|~0xff; /* don't touch high bits */
 420         /* special handling of RE field */
 421         if (ana->fields&ISO_SUSP_RELDIR)
 422                 return cd9660_rrip_reldir(p,ana);
 423
 424         return ISO_SUSP_IDFLAG;
 425 }
 426
 427 /*
 428  * Continuation pointer
 429  */
 430 static int
 431 cd9660_rrip_cont(ISO_RRIP_CONT *p, ISO_RRIP_ANALYZE *ana)
 432 {
 433         ana->iso_ce_blk = isonum_733(p->location);
 434         ana->iso_ce_off = isonum_733(p->offset);
 435         ana->iso_ce_len = isonum_733(p->length);
 436         return ISO_SUSP_CONT;
 437 }
 438
 439 /*
 440  * System Use end
 441  */
 442 /* ARGSUSED */
 443 static int
 444 cd9660_rrip_stop(__unused ISO_SUSP_HEADER *p, __unused ISO_RRIP_ANALYZE *ana)
 445 {
 446         return ISO_SUSP_STOP;
 447 }
 448
 449 /*
 450  * Extension reference
 451  */
 452 static int
 453 cd9660_rrip_extref(ISO_RRIP_EXTREF *p, ISO_RRIP_ANALYZE *ana)
 454 {
 455         if (isonum_711(p->len_id) != 10
 456             || bcmp((char *)p + 8,"RRIP_1991A",10)
 457             || isonum_711(p->version) != 1)
 458                 return 0;
 459         ana->fields &= ~ISO_SUSP_EXTREF;
 460         return ISO_SUSP_EXTREF;
 461 }
 462
 463 typedef int (*rrip_table_func)(ISO_SUSP_HEADER *phead, ISO_RRIP_ANALYZE *ana);
 464 typedef int (*rrip_table_func2)(struct iso_directory_record *isodir,
 465                               ISO_RRIP_ANALYZE *ana);
 466 typedef struct {
 467         char type[2];
 468         rrip_table_func func;
 469         rrip_table_func2 func2;
 470         int result;
 471 } RRIP_TABLE;
 472
 473 static int
 474 cd9660_rrip_loop(struct iso_directory_record *isodir, ISO_RRIP_ANALYZE *ana,
 475                 RRIP_TABLE *table)
 476 {
 477         register RRIP_TABLE *ptable;
 478         register ISO_SUSP_HEADER *phead;
 479         register ISO_SUSP_HEADER *pend;
 480         struct buf *bp = NULL;
 481         char *pwhead;
 482         int result;
 483
 484         /*
 485          * Note: If name length is odd,
 486          *       it will be padding 1 byte  after the name
 487          */
 488         pwhead = isodir->name + isonum_711(isodir->name_len);
 489         if (!(isonum_711(isodir->name_len)&1))
 490                 pwhead++;
 491
 492         /* If it's not the '.' entry of the root dir obey SP field */
 493         if (*isodir->name != 0
 494             || isonum_733(isodir->extent) != ana->imp->root_extent)
 495                 pwhead += ana->imp->rr_skip;
 496         else
 497                 pwhead += ana->imp->rr_skip0;
 498
 499         phead = (ISO_SUSP_HEADER *)pwhead;
 500         pend = (ISO_SUSP_HEADER *)((char *)isodir + isonum_711(isodir->length));
 501
 502         result = 0;
 503         while (1) {
 504                 ana->iso_ce_len = 0;
 505                 /*
 506                  * Note: "pend" should be more than one SUSP header
 507                  */
 508                 while (pend >= phead + 1) {
 509                         if (isonum_711(phead->version) == 1) {
 510                                 for (ptable = table; ptable->func; ptable++) {
 511                                         if (*phead->type == *ptable->type
 512                                             && phead->type[1] == ptable->type[1]) {
 513                                                 result |= (ptable->func(phead,ana));
 514                                                 break;
 515                                         }
 516                                 }
 517                                 if (!ana->fields)
 518                                         break;
 519                         }
 520                         if (result&ISO_SUSP_STOP) {
 521                                 result &= ~ISO_SUSP_STOP;
 522                                 break;
 523                         }
 524                         /* plausibility check */
 525                         if (isonum_711(phead->length) < sizeof(*phead))
 526                                 break;
 527                         /*
 528                          * move to next SUSP
 529                          * Hopefully this works with newer versions, too
 530                          */
 531                         phead = (ISO_SUSP_HEADER *)((char *)phead + isonum_711(phead->length));
 532                 }
 533
 534                 if (ana->fields && ana->iso_ce_len) {
 535                         if (ana->iso_ce_blk >= ana->imp->volume_space_size
 536                             || ana->iso_ce_off + ana->iso_ce_len > ana->imp->logical_block_size
 537                             || buf_bread(ana->imp->im_devvp,
 538 #if 1 // radar 1669467 - logical and physical blocksize are the same
 539                                      (daddr64_t)((unsigned)ana->iso_ce_blk),
 540 #else
 541                                      (daddr64_t)((unsigned)(ana->iso_ce_blk << (ana->imp->im_bshift - DEV_BSHIFT))),
 542 #endif // radar 1669467
 543                                      ana->imp->logical_block_size, NOCRED, &bp))
 544                                 /* what to do now? */
 545                                 break;
 546                         phead = (ISO_SUSP_HEADER *)((char *)buf_dataptr(bp) + ana->iso_ce_off);
 547                         pend = (ISO_SUSP_HEADER *) ((char *)phead + ana->iso_ce_len);
 548                 } else
 549                         break;
 550         }
 551         if (bp)
 552                 buf_brelse(bp);
 553         /*
 554          * If we don't find the Basic SUSP stuffs, just set default value
 555          *   (attribute/time stamp)
 556          */
 557         for (ptable = table; ptable->func2; ptable++)
 558                 if (!(ptable->result&result))
 559                         ptable->func2(isodir,ana);
 560
 561         return result;
 562 }
 563
 564 /*
 565  * Get Attributes.
 566  */
 567 static RRIP_TABLE rrip_table_analyze[] = {
 568         { "PX", (rrip_table_func)cd9660_rrip_attr,
 569                                         (rrip_table_func2)cd9660_rrip_defattr,
 570                                                                 ISO_SUSP_ATTR },
 571         { "TF", (rrip_table_func)cd9660_rrip_tstamp,
 572                                         (rrip_table_func2)cd9660_rrip_deftstamp,
 573                                                                 ISO_SUSP_TSTAMP },
 574         { "PN", (rrip_table_func)cd9660_rrip_device,
 575                                         0,                      ISO_SUSP_DEVICE },
 576         { "RR", (rrip_table_func)cd9660_rrip_idflag,
 577                                         0,                      ISO_SUSP_IDFLAG },
 578         { "CE", (rrip_table_func)cd9660_rrip_cont,
 579                                         0,                      ISO_SUSP_CONT },
 580         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 581         { "",   0,                      0,                      0 }
 582 };
 583
 584 int
 585 cd9660_rrip_analyze(struct iso_directory_record *isodir, struct iso_node *inop,
 586                         struct iso_mnt *imp)
 587 {
 588         ISO_RRIP_ANALYZE analyze;
 589
 590         analyze.inop = inop;
 591         analyze.imp = imp;
 592         analyze.fields = ISO_SUSP_ATTR|ISO_SUSP_TSTAMP|ISO_SUSP_DEVICE;
 593
 594         return cd9660_rrip_loop(isodir,&analyze,rrip_table_analyze);
 595 }
 596
 597 /*
 598  * Get Alternate Name.
 599  */
 600 static RRIP_TABLE rrip_table_getname[] = {
 601         { "NM", (rrip_table_func)cd9660_rrip_altname,
 602                                         (rrip_table_func2)cd9660_rrip_defname,
 603                                                                 ISO_SUSP_ALTNAME },
 604         { "CL", (rrip_table_func)cd9660_rrip_pclink,
 605                                         0,                      ISO_SUSP_CLINK|ISO_SUSP_PLINK },
 606         { "PL", (rrip_table_func)cd9660_rrip_pclink,
 607                                         0,                      ISO_SUSP_CLINK|ISO_SUSP_PLINK },
 608         { "RE", (rrip_table_func)cd9660_rrip_reldir,
 609                                         0,                      ISO_SUSP_RELDIR },
 610         { "RR", (rrip_table_func)cd9660_rrip_idflag,
 611                                         0,                      ISO_SUSP_IDFLAG },
 612         { "CE", (rrip_table_func)cd9660_rrip_cont,
 613                                         0,                      ISO_SUSP_CONT },
 614         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 615         { "",   0,                      0,                      0 }
 616 };
 617
 618 int
 619 cd9660_rrip_getname(struct iso_directory_record *isodir, char *outbuf,
 620                         u_short *outlen, ino_t *inump, struct iso_mnt *imp)
 621 {
 622         ISO_RRIP_ANALYZE analyze;
 623         RRIP_TABLE *tab;
 624
 625         analyze.outbuf = outbuf;
 626         analyze.outlen = outlen;
 627         analyze.maxlen = ISO_RRIP_NAMEMAX;
 628         analyze.inump = inump;
 629         analyze.imp = imp;
 630         analyze.fields = ISO_SUSP_ALTNAME|ISO_SUSP_RELDIR|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
 631         *outlen = 0;
 632
 633         tab = rrip_table_getname;
 634         if (*isodir->name == 0
 635             || *isodir->name == 1) {
 636                 cd9660_rrip_defname(isodir,&analyze);
 637
 638                 analyze.fields &= ~ISO_SUSP_ALTNAME;
 639                 tab++;
 640         }
 641
 642         return cd9660_rrip_loop(isodir,&analyze,tab);
 643 }
 644
 645 /*
 646  * Get Symbolic Link.
 647  */
 648 static RRIP_TABLE rrip_table_getsymname[] = {
 649         { "SL", (rrip_table_func)cd9660_rrip_slink,
 650                                         0,                      ISO_SUSP_SLINK },
 651         { "RR", (rrip_table_func)cd9660_rrip_idflag,
 652                                         0,                      ISO_SUSP_IDFLAG },
 653         { "CE", (rrip_table_func)cd9660_rrip_cont,
 654                                         0,                      ISO_SUSP_CONT },
 655         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 656         { "",   0,                      0,                      0 }
 657 };
 658
 659 int
 660 cd9660_rrip_getsymname(struct iso_directory_record *isodir, char *outbuf,
 661                         u_short *outlen, struct iso_mnt *imp)
 662 {
 663         ISO_RRIP_ANALYZE analyze;
 664
 665         analyze.outbuf = outbuf;
 666         analyze.outlen = outlen;
 667         *outlen = 0;
 668         analyze.maxlen = MAXPATHLEN;
 669         analyze.cont = 1;               /* don't start with a slash */
 670         analyze.imp = imp;
 671         analyze.fields = ISO_SUSP_SLINK;
 672
 673         return (cd9660_rrip_loop(isodir,&analyze,rrip_table_getsymname)&ISO_SUSP_SLINK);
 674 }
 675
 676 static RRIP_TABLE rrip_table_extref[] = {
 677         { "ER", (rrip_table_func)cd9660_rrip_extref,
 678                                         0,                      ISO_SUSP_EXTREF },
 679         { "CE", (rrip_table_func)cd9660_rrip_cont,
 680                                         0,                      ISO_SUSP_CONT },
 681         { "ST", cd9660_rrip_stop,       0,                      ISO_SUSP_STOP },
 682         { "",   0,                      0,                      0 }
 683 };
 684
 685 /*
 686  * Check for Rock Ridge Extension and return offset of its fields.
 687  * Note: We insist on the ER field.
 688  */
 689 int
 690 cd9660_rrip_offset(struct iso_directory_record *isodir, struct iso_mnt *imp)
 691 {
 692         ISO_RRIP_OFFSET *p;
 693         ISO_RRIP_ANALYZE analyze;
 694
 695         imp->rr_skip0 = 0;
 696         p = (ISO_RRIP_OFFSET *)(isodir->name + 1);
 697         if (bcmp(p,"SP\7\1\276\357",6)) {
 698                 /* Maybe, it's a CDROM XA disc? */
 699                 imp->rr_skip0 = 15;
 700                 p = (ISO_RRIP_OFFSET *)((char *)p + 15);
 701                 if (bcmp(p,"SP\7\1\276\357",6))
 702                         return -1;
 703         }
 704
 705         analyze.imp = imp;
 706         analyze.fields = ISO_SUSP_EXTREF;
 707         if (!(cd9660_rrip_loop(isodir,&analyze,rrip_table_extref)&ISO_SUSP_EXTREF))
 708                 return -1;
 709
 710         return isonum_711(p->skip);
 711 }