+++ /dev/null
-/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-/* $NetBSD: cd9660_util.c,v 1.8 1994/12/13 22:33:25 mycroft Exp $ */
-
-/*-
- * Copyright (c) 1994
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley
- * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
- * Support code is derived from software contributed to Berkeley
- * by Atsushi Murai (amurai@spec.co.jp).
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)cd9660_util.c 8.3 (Berkeley) 12/5/94
- *
- * HISTORY
- * 7-Dec-98 Add ATTR_VOL_MOUNTFLAGS attribute support - djb
- * 18-Nov-98 Add support for volfs - djb
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/vnode.h>
-#include <sys/mount.h>
-#include <sys/namei.h>
-#include <sys/resourcevar.h>
-#include <sys/kernel.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include <sys/buf.h>
-#include <sys/proc.h>
-#include <sys/kauth.h>
-#include <sys/conf.h>
-#include <sys/utfconv.h>
-#include <miscfs/specfs/specdev.h> /* XXX */
-#include <miscfs/fifofs/fifo.h> /* XXX */
-#include <sys/malloc.h>
-#include <sys/dir.h>
-#include <sys/attr.h>
-#include <kern/assert.h>
-
-#include <isofs/cd9660/iso.h>
-#include <isofs/cd9660/cd9660_node.h>
-#include <isofs/cd9660/iso_rrip.h>
-
-#include <libkern/OSByteOrder.h>
-
-/*
- * translate and compare a filename
- * Note: Version number plus ';' may be omitted.
- */
-int
-isofncmp(u_char *fn, int fnlen, u_char *isofn, int isolen)
-{
- int i, j;
- char c;
-
- while (--fnlen >= 0) {
- if (--isolen < 0)
- return *fn;
- if ((c = *isofn++) == ';') {
- switch (*fn++) {
- default:
- return *--fn;
- case 0:
- return 0;
- case ';':
- break;
- }
- for (i = 0; --fnlen >= 0; i = i * 10 + *fn++ - '0') {
- if (*fn < '0' || *fn > '9') {
- return -1;
- }
- }
- for (j = 0; --isolen >= 0; j = j * 10 + *isofn++ - '0');
- return i - j;
- }
- /* if raw comparison fails, check if char was mapped */
- if (c != *fn) {
- if (c >= 'A' && c <= 'Z') {
- if (c + ('a' - 'A') != *fn) {
- if (*fn >= 'a' && *fn <= 'z')
- return *fn - ('a' - 'A') - c;
- else
- return *fn - c;
- }
- } else if (c == '/') {
- if (*fn != ':')
- return *fn - c;
- } else if (c > 0 || *fn != '_')
- return *fn - c;
- }
- fn++;
- }
- if (isolen > 0) {
- switch (*isofn) {
- default:
- return -1;
- case '.':
- if (isofn[1] != ';')
- return -1;
- case ';':
- return 0;
- }
- }
- return 0;
-}
-
-
-/*
- * translate and compare a UCS-2 filename
- * Note: Version number plus ';' may be omitted.
- *
- * The name pointed to by "fn" is the search name, whose characters are
- * in native endian order. The name "ucsfn" is the on-disk name, whose
- * characters are in big endian order.
- */
-
-int
-ucsfncmp(u_int16_t *fn, int fnlen, u_int16_t *ucsfn, int ucslen)
-{
- int i, j;
- u_int16_t c;
-
- /* convert byte count to char count */
- ucslen /= 2;
- fnlen /= 2;
-
- while (--fnlen >= 0) {
- if (--ucslen < 0)
- return *fn;
- if ((c = OSSwapBigToHostInt16(*ucsfn++)) == UCS_SEPARATOR2) {
- switch (*fn++) {
- default:
- return *--fn;
- case 0:
- return 0;
- case UCS_SEPARATOR2:
- break;
- }
- for (i = 0; --fnlen >= 0; i = i * 10 + *fn++ - '0') {
- if (*fn < '0' || *fn > '9') {
- return -1;
- }
- }
- for (j = 0; --ucslen >= 0; j = j * 10 + OSSwapBigToHostInt16(*ucsfn++) - '0');
- return i - j;
- }
- if (c != *fn)
- return *fn - c;
- fn++;
- }
- if (ucslen > 0) {
- switch (*ucsfn) {
- default:
- return -1;
- case OSSwapHostToBigConstInt16(UCS_SEPARATOR1):
- if (ucsfn[1] != OSSwapHostToBigConstInt16(UCS_SEPARATOR2))
- return -1;
- case OSSwapHostToBigConstInt16(UCS_SEPARATOR2):
- return 0;
- }
- }
- return 0;
-}
-
-
-/*
- * translate a filename
- */
-void
-isofntrans(u_char *infn, int infnlen, u_char *outfn, u_short *outfnlen,
- int original, int assoc)
-{
- int fnidx = 0;
-
- /*
- * Add a "._" prefix for associated files
- */
- if (assoc) {
- *outfn++ = ASSOCCHAR1;
- *outfn++ = ASSOCCHAR2;
- fnidx += 2;
- infnlen +=2;
- }
- for (; fnidx < infnlen; fnidx++) {
- char c = *infn++;
-
- /*
- * Some ISO 9600 CD names contain 8-bit chars.
- * These chars are mapped to '_' because there
- * is no context for mapping them to UTF-8.
- * In addition '/' is mapped to ':'.
- *
- * isofncmp accounts for these mappings.
- */
- if (!original) {
- if (c < 0)
- c = '_';
- else if (c == '/')
- c = ':';
- else if (c == '.' && *infn == ';')
- break;
- else if (c == ';')
- break;
- }
- *outfn++ = c;
- }
- *outfnlen = fnidx;
-}
-
-
-
-/*
- * translate a UCS-2 filename to UTF-8
- */
-void
-ucsfntrans(u_int16_t *infn, int infnlen, u_char *outfn, u_short *outfnlen,
- int dir, int assoc)
-{
- if (infnlen == 1) {
- strcpy(outfn, "..");
-
- if (*(u_char*)infn == 0)
- *outfnlen = 1;
- else if (*(u_char*)infn == 1)
- *outfnlen = 2;
- } else {
- int fnidx;
- size_t outbytes;
- int flags;
-
- fnidx = infnlen/2;
- flags = 0;
-
- /*
- * Add a "._" prefix for associated files
- */
- if (assoc) {
- *outfn++ = ASSOCCHAR1;
- *outfn++ = ASSOCCHAR2;
- }
- if (!dir) {
- /* strip file version number */
- for (fnidx--; fnidx > 0; fnidx--) {
- /* stop when ';' is found */
- if (infn[fnidx] == OSSwapHostToBigConstInt16(UCS_SEPARATOR2)) {
- /* drop dangling dot */
- if (fnidx > 0 && infn[fnidx-1] == OSSwapHostToBigConstInt16(UCS_SEPARATOR1))
- fnidx--;
- break;
- }
- }
- if (fnidx <= 0)
- fnidx = infnlen/2;
- }
-
- flags = UTF_NO_NULL_TERM | UTF_DECOMPOSED | UTF_BIG_ENDIAN;
-
- (void) utf8_encodestr(infn, fnidx * 2, outfn, &outbytes, ISO_JOLIET_NAMEMAX, 0, flags);
- *outfnlen = assoc ? outbytes + 2 : outbytes;
- }
-}
-
-
-/*
- * count the number of children by enumerating the directory
- */
-static int
-isochildcount(struct vnode *vdp, int *dircnt, int *filcnt)
-{
- struct iso_node *dp;
- struct buf *bp = NULL;
- struct iso_mnt *imp;
- struct iso_directory_record *ep;
- uint32_t bmask;
- int error = 0;
- int reclen;
- int dirs, files;
- int blkoffset;
- int logblksize;
- int32_t diroffset;
-
- dp = VTOI(vdp);
- imp = dp->i_mnt;
- bmask = imp->im_sector_size - 1;
- logblksize = imp->im_sector_size;
- blkoffset = diroffset = 0;
- dirs = files = 0;
-
- while (diroffset < dp->i_size) {
- /*
- * If offset is on a block boundary, read the next
- * directory block. Release previous if it exists.
- */
- if ((diroffset & bmask) == 0) {
- if (bp != NULL)
- buf_brelse(bp);
- if ( (error = cd9660_blkatoff(vdp, SECTOFF(imp, diroffset), NULL, &bp)) )
- break;
- blkoffset = 0;
- }
-
- ep = (struct iso_directory_record *)
- (buf_dataptr(bp) + blkoffset);
-
- reclen = isonum_711(ep->length);
- if (reclen == 0) {
- /* skip to next block, if any */
- diroffset =
- (diroffset & ~bmask) + logblksize;
- continue;
- }
-
- if ((reclen < ISO_DIRECTORY_RECORD_SIZE) ||
- (blkoffset + reclen > logblksize) ||
- (reclen < ISO_DIRECTORY_RECORD_SIZE + isonum_711(ep->name_len))){
- /* illegal, so give up */
- break;
- }
-
- /*
- * Some poorly mastered discs have an incorrect directory
- * file size. If the '.' entry has a better size (bigger)
- * then use that instead.
- */
- if ((diroffset == 0) && (isonum_733(ep->size) > dp->i_size)) {
- dp->i_size = isonum_733(ep->size);
- }
-
- if ( isonum_711(ep->flags) & directoryBit )
- dirs++;
- else if ((isonum_711(ep->flags) & associatedBit) == 0)
- files++;
-
- diroffset += reclen;
- blkoffset += reclen;
- }
-
- if (bp)
- buf_brelse (bp);
-
- *dircnt = dirs;
- *filcnt = files;
-
- return (error);
-}
-
-
-static uint32_t
-DerivePermissionSummary(uid_t owner, gid_t group, mode_t obj_mode, __unused struct iso_mnt *imp)
-{
- kauth_cred_t cred = kauth_cred_get();
- uint32_t permissions;
- int is_member;
-
- /* User id 0 (root) always gets access. */
- if (!suser(cred, NULL)) {
- permissions = R_OK | X_OK;
- goto Exit;
- };
-
- /* Otherwise, check the owner. */
- if (owner == kauth_cred_getuid(cred)) {
- permissions = ((uint32_t)obj_mode & S_IRWXU) >> 6;
- goto Exit;
- }
-
- /* Otherwise, check the groups. */
- if (kauth_cred_ismember_gid(cred, group, &is_member) == 0 && is_member) {
- permissions = ((uint32_t)obj_mode & S_IRWXG) >> 3;
- goto Exit;
- }
-
- /* Otherwise, settle for 'others' access. */
- permissions = (uint32_t)obj_mode & S_IRWXO;
-
-Exit:
- return permissions & ~W_OK; /* Write access is always impossible */
-}
projects / apple / xnu.git / blobdiff