687 lines
16 KiB
C
687 lines
16 KiB
C
/*-
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* Copyright (c) 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley
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* by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
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* Support code is derived from software contributed to Berkeley
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* by Atsushi Murai (amurai@spec.co.jp).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)cd9660_rrip.c 8.2 (Berkeley) 1/23/94
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* $Id: cd9660_rrip.c,v 1.4 1994/09/15 19:46:01 bde Exp $
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/buf.h>
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#include <sys/file.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/kernel.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <isofs/cd9660/iso.h>
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#include <isofs/cd9660/cd9660_node.h>
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#include <isofs/cd9660/cd9660_rrip.h>
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#include <isofs/cd9660/iso_rrip.h>
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/*
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* POSIX file attribute
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*/
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static int
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cd9660_rrip_attr(p,ana)
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ISO_RRIP_ATTR *p;
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ISO_RRIP_ANALYZE *ana;
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{
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ana->inop->inode.iso_mode = isonum_731(p->mode_l);
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ana->inop->inode.iso_uid = (uid_t)isonum_731(p->uid_l);
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ana->inop->inode.iso_gid = (gid_t)isonum_731(p->gid_l);
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ana->inop->inode.iso_links = isonum_731(p->links_l);
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ana->fields &= ~ISO_SUSP_ATTR;
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return ISO_SUSP_ATTR;
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}
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static void
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cd9660_rrip_defattr(isodir,ana)
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struct iso_directory_record *isodir;
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ISO_RRIP_ANALYZE *ana;
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{
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/* But this is a required field! */
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printf("RRIP without PX field?\n");
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cd9660_defattr(isodir,ana->inop,NULL);
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}
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/*
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* Symbolic Links
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*/
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static int
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cd9660_rrip_slink(p,ana)
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ISO_RRIP_SLINK *p;
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ISO_RRIP_ANALYZE *ana;
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{
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register ISO_RRIP_SLINK_COMPONENT *pcomp;
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register ISO_RRIP_SLINK_COMPONENT *pcompe;
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int len, wlen, cont;
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char *outbuf, *inbuf;
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pcomp = (ISO_RRIP_SLINK_COMPONENT *)p->component;
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pcompe = (ISO_RRIP_SLINK_COMPONENT *)((char *)p + isonum_711(p->h.length));
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len = *ana->outlen;
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outbuf = ana->outbuf;
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cont = ana->cont;
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/*
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* Gathering a Symbolic name from each component with path
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*/
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for (;
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pcomp < pcompe;
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pcomp = (ISO_RRIP_SLINK_COMPONENT *)((char *)pcomp + ISO_RRIP_SLSIZ
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+ isonum_711(pcomp->clen))) {
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if (!cont) {
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if (len < ana->maxlen) {
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len++;
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*outbuf++ = '/';
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}
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}
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cont = 0;
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inbuf = "..";
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wlen = 0;
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switch (*pcomp->cflag) {
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case ISO_SUSP_CFLAG_CURRENT:
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/* Inserting Current */
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wlen = 1;
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break;
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case ISO_SUSP_CFLAG_PARENT:
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/* Inserting Parent */
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wlen = 2;
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break;
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case ISO_SUSP_CFLAG_ROOT:
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/* Inserting slash for ROOT */
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/* start over from beginning(?) */
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outbuf -= len;
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len = 0;
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break;
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case ISO_SUSP_CFLAG_VOLROOT:
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/* Inserting a mount point i.e. "/cdrom" */
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/* same as above */
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outbuf -= len;
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len = 0;
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inbuf = ana->imp->im_mountp->mnt_stat.f_mntonname;
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wlen = strlen(inbuf);
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break;
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case ISO_SUSP_CFLAG_HOST:
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/* Inserting hostname i.e. "kurt.tools.de" */
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inbuf = hostname;
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wlen = hostnamelen;
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break;
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case ISO_SUSP_CFLAG_CONTINUE:
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cont = 1;
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/* fall thru */
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case 0:
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/* Inserting component */
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wlen = isonum_711(pcomp->clen);
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inbuf = pcomp->name;
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break;
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default:
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printf("RRIP with incorrect flags?");
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wlen = ana->maxlen + 1;
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break;
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}
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if (len + wlen > ana->maxlen) {
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/* indicate error to caller */
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ana->cont = 1;
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ana->fields = 0;
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ana->outbuf -= *ana->outlen;
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*ana->outlen = 0;
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return 0;
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}
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bcopy(inbuf,outbuf,wlen);
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outbuf += wlen;
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len += wlen;
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}
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ana->outbuf = outbuf;
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*ana->outlen = len;
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ana->cont = cont;
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if (!isonum_711(p->flags)) {
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ana->fields &= ~ISO_SUSP_SLINK;
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return ISO_SUSP_SLINK;
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}
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return 0;
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}
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/*
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* Alternate name
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*/
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static int
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cd9660_rrip_altname(p,ana)
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ISO_RRIP_ALTNAME *p;
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ISO_RRIP_ANALYZE *ana;
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{
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char *inbuf;
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int wlen;
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int cont;
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inbuf = "..";
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wlen = 0;
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cont = 0;
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switch (*p->flags) {
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case ISO_SUSP_CFLAG_CURRENT:
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/* Inserting Current */
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wlen = 1;
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break;
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case ISO_SUSP_CFLAG_PARENT:
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/* Inserting Parent */
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wlen = 2;
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break;
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case ISO_SUSP_CFLAG_HOST:
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/* Inserting hostname i.e. "kurt.tools.de" */
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inbuf = hostname;
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wlen = hostnamelen;
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break;
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case ISO_SUSP_CFLAG_CONTINUE:
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cont = 1;
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/* fall thru */
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case 0:
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/* Inserting component */
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wlen = isonum_711(p->h.length) - 5;
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inbuf = (char *)p + 5;
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break;
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default:
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printf("RRIP with incorrect NM flags?\n");
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wlen = ana->maxlen + 1;
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break;
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}
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if ((*ana->outlen += wlen) > ana->maxlen) {
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/* treat as no name field */
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ana->fields &= ~ISO_SUSP_ALTNAME;
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ana->outbuf -= *ana->outlen - wlen;
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*ana->outlen = 0;
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return 0;
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}
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bcopy(inbuf,ana->outbuf,wlen);
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ana->outbuf += wlen;
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if (!cont) {
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ana->fields &= ~ISO_SUSP_ALTNAME;
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return ISO_SUSP_ALTNAME;
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}
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return 0;
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}
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static void
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cd9660_rrip_defname(isodir,ana)
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struct iso_directory_record *isodir;
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ISO_RRIP_ANALYZE *ana;
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{
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strcpy(ana->outbuf,"..");
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switch (*isodir->name) {
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default:
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isofntrans(isodir->name,isonum_711(isodir->name_len),
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ana->outbuf,ana->outlen,
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1,isonum_711(isodir->flags)&4);
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break;
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case 0:
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*ana->outlen = 1;
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break;
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case 1:
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*ana->outlen = 2;
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break;
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}
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}
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/*
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* Parent or Child Link
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*/
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static int
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cd9660_rrip_pclink(p,ana)
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ISO_RRIP_CLINK *p;
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ISO_RRIP_ANALYZE *ana;
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{
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*ana->inump = isonum_733(p->dir_loc) << ana->imp->im_bshift;
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ana->fields &= ~(ISO_SUSP_CLINK|ISO_SUSP_PLINK);
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return *p->h.type == 'C' ? ISO_SUSP_CLINK : ISO_SUSP_PLINK;
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}
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/*
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* Relocated directory
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*/
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static int
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cd9660_rrip_reldir(p,ana)
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ISO_RRIP_RELDIR *p;
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ISO_RRIP_ANALYZE *ana;
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{
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/* special hack to make caller aware of RE field */
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*ana->outlen = 0;
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ana->fields = 0;
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return ISO_SUSP_RELDIR|ISO_SUSP_ALTNAME|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
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}
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static int
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cd9660_rrip_tstamp(p,ana)
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ISO_RRIP_TSTAMP *p;
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ISO_RRIP_ANALYZE *ana;
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{
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unsigned char *ptime;
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ptime = p->time;
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/* Check a format of time stamp (7bytes/17bytes) */
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if (!(*p->flags&ISO_SUSP_TSTAMP_FORM17)) {
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if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
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ptime += 7;
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if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
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cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_mtime);
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ptime += 7;
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} else
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bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec));
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if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
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cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_atime);
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ptime += 7;
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} else
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ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
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if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
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cd9660_tstamp_conv7(ptime,&ana->inop->inode.iso_ctime);
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else
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ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
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} else {
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if (*p->flags&ISO_SUSP_TSTAMP_CREAT)
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ptime += 17;
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if (*p->flags&ISO_SUSP_TSTAMP_MODIFY) {
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cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_mtime);
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ptime += 17;
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} else
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bzero(&ana->inop->inode.iso_mtime,sizeof(struct timespec));
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if (*p->flags&ISO_SUSP_TSTAMP_ACCESS) {
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cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_atime);
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ptime += 17;
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} else
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ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
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if (*p->flags&ISO_SUSP_TSTAMP_ATTR)
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cd9660_tstamp_conv17(ptime,&ana->inop->inode.iso_ctime);
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else
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ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
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}
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ana->fields &= ~ISO_SUSP_TSTAMP;
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return ISO_SUSP_TSTAMP;
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}
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static void
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cd9660_rrip_deftstamp(isodir,ana)
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struct iso_directory_record *isodir;
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ISO_RRIP_ANALYZE *ana;
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{
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cd9660_deftstamp(isodir,ana->inop,NULL);
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}
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/*
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* POSIX device modes
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*/
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static int
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cd9660_rrip_device(p,ana)
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ISO_RRIP_DEVICE *p;
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ISO_RRIP_ANALYZE *ana;
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{
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unsigned high, low;
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high = isonum_733(p->dev_t_high_l);
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low = isonum_733(p->dev_t_low_l);
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if ( high == 0 ) {
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ana->inop->inode.iso_rdev = makedev( major(low), minor(low) );
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} else {
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ana->inop->inode.iso_rdev = makedev( high, minor(low) );
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}
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ana->fields &= ~ISO_SUSP_DEVICE;
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return ISO_SUSP_DEVICE;
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}
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/*
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* Flag indicating
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*/
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static int
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cd9660_rrip_idflag(p,ana)
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ISO_RRIP_IDFLAG *p;
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ISO_RRIP_ANALYZE *ana;
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{
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ana->fields &= isonum_711(p->flags)|~0xff; /* don't touch high bits */
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/* special handling of RE field */
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if (ana->fields&ISO_SUSP_RELDIR)
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return cd9660_rrip_reldir(p,ana);
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return ISO_SUSP_IDFLAG;
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}
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/*
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* Continuation pointer
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*/
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static int
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cd9660_rrip_cont(p,ana)
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ISO_RRIP_CONT *p;
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ISO_RRIP_ANALYZE *ana;
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{
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ana->iso_ce_blk = isonum_733(p->location);
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ana->iso_ce_off = isonum_733(p->offset);
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ana->iso_ce_len = isonum_733(p->length);
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return ISO_SUSP_CONT;
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}
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/*
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* System Use end
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*/
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static int
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cd9660_rrip_stop(p,ana)
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ISO_SUSP_HEADER *p;
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ISO_RRIP_ANALYZE *ana;
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{
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/* stop analyzing */
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ana->fields = 0;
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return ISO_SUSP_STOP;
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}
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/*
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* Extension reference
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*/
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static int
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cd9660_rrip_extref(p,ana)
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ISO_RRIP_EXTREF *p;
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ISO_RRIP_ANALYZE *ana;
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{
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if (isonum_711(p->len_id) != 10
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|| bcmp((char *)p + 8,"RRIP_1991A",10)
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|| isonum_711(p->version) != 1)
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return 0;
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ana->fields &= ~ISO_SUSP_EXTREF;
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return ISO_SUSP_EXTREF;
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}
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typedef struct {
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char type[2];
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int (*func)();
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void (*func2)();
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int result;
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} RRIP_TABLE;
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static int
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cd9660_rrip_loop(isodir,ana,table)
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struct iso_directory_record *isodir;
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ISO_RRIP_ANALYZE *ana;
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RRIP_TABLE *table;
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{
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register RRIP_TABLE *ptable;
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register ISO_SUSP_HEADER *phead;
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register ISO_SUSP_HEADER *pend;
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struct buf *bp = NULL;
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char *pwhead;
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int result;
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/*
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* Note: If name length is odd,
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* it will be padding 1 byte after the name
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*/
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pwhead = isodir->name + isonum_711(isodir->name_len);
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if (!(isonum_711(isodir->name_len)&1))
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pwhead++;
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/* If it's not the '.' entry of the root dir obey SP field */
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if (*isodir->name != 0
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|| isonum_733(isodir->extent) != ana->imp->root_extent)
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pwhead += ana->imp->rr_skip;
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else
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pwhead += ana->imp->rr_skip0;
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phead = (ISO_SUSP_HEADER *)pwhead;
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pend = (ISO_SUSP_HEADER *)((char *)isodir + isonum_711(isodir->length));
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result = 0;
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while (1) {
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ana->iso_ce_len = 0;
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/*
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* Note: "pend" should be more than one SUSP header
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*/
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while (pend >= phead + 1) {
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if (isonum_711(phead->version) == 1) {
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for (ptable = table; ptable->func; ptable++) {
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if (*phead->type == *ptable->type
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&& phead->type[1] == ptable->type[1]) {
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result |= ptable->func(phead,ana);
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break;
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}
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}
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if (!ana->fields)
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break;
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}
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/*
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* move to next SUSP
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* Hopefully this works with newer versions, too
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*/
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phead = (ISO_SUSP_HEADER *)((char *)phead + isonum_711(phead->length));
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}
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if ( ana->fields && ana->iso_ce_len ) {
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if (ana->iso_ce_blk >= ana->imp->volume_space_size
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|| ana->iso_ce_off + ana->iso_ce_len > ana->imp->logical_block_size
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|| bread(ana->imp->im_devvp,
|
|
iso_lblktodaddr(ana->imp, ana->iso_ce_blk),
|
|
ana->imp->logical_block_size,NOCRED,&bp))
|
|
/* what to do now? */
|
|
break;
|
|
phead = (ISO_SUSP_HEADER *)(bp->b_un.b_addr + ana->iso_ce_off);
|
|
pend = (ISO_SUSP_HEADER *) ((char *)phead + ana->iso_ce_len);
|
|
} else
|
|
break;
|
|
}
|
|
if (bp)
|
|
brelse(bp);
|
|
/*
|
|
* If we don't find the Basic SUSP stuffs, just set default value
|
|
* ( attribute/time stamp )
|
|
*/
|
|
for (ptable = table; ptable->func2; ptable++)
|
|
if (!(ptable->result&result))
|
|
ptable->func2(isodir,ana);
|
|
|
|
return result;
|
|
}
|
|
|
|
static RRIP_TABLE rrip_table_analyze[] = {
|
|
{ "PX", cd9660_rrip_attr, cd9660_rrip_defattr, ISO_SUSP_ATTR },
|
|
{ "TF", cd9660_rrip_tstamp, cd9660_rrip_deftstamp, ISO_SUSP_TSTAMP },
|
|
{ "PN", cd9660_rrip_device, 0, ISO_SUSP_DEVICE },
|
|
{ "RR", cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG },
|
|
{ "CE", cd9660_rrip_cont, 0, ISO_SUSP_CONT },
|
|
{ "ST", cd9660_rrip_stop, 0, ISO_SUSP_STOP },
|
|
{ "", 0, 0, 0 }
|
|
};
|
|
|
|
int
|
|
cd9660_rrip_analyze(isodir,inop,imp)
|
|
struct iso_directory_record *isodir;
|
|
struct iso_node *inop;
|
|
struct iso_mnt *imp;
|
|
{
|
|
ISO_RRIP_ANALYZE analyze;
|
|
|
|
analyze.inop = inop;
|
|
analyze.imp = imp;
|
|
analyze.fields = ISO_SUSP_ATTR|ISO_SUSP_TSTAMP|ISO_SUSP_DEVICE;
|
|
|
|
return cd9660_rrip_loop(isodir,&analyze,rrip_table_analyze);
|
|
}
|
|
|
|
/*
|
|
* Get Alternate Name from 'AL' record
|
|
* If either no AL record or 0 length,
|
|
* it will be return the translated ISO9660 name,
|
|
*/
|
|
static RRIP_TABLE rrip_table_getname[] = {
|
|
{ "NM", cd9660_rrip_altname, cd9660_rrip_defname, ISO_SUSP_ALTNAME },
|
|
{ "CL", cd9660_rrip_pclink, 0, ISO_SUSP_CLINK|ISO_SUSP_PLINK },
|
|
{ "PL", cd9660_rrip_pclink, 0, ISO_SUSP_CLINK|ISO_SUSP_PLINK },
|
|
{ "RE", cd9660_rrip_reldir, 0, ISO_SUSP_RELDIR },
|
|
{ "RR", cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG },
|
|
{ "CE", cd9660_rrip_cont, 0, ISO_SUSP_CONT },
|
|
{ "ST", cd9660_rrip_stop, 0, ISO_SUSP_STOP },
|
|
{ "", 0, 0, 0 }
|
|
};
|
|
|
|
int
|
|
cd9660_rrip_getname(isodir,outbuf,outlen,inump,imp)
|
|
struct iso_directory_record *isodir;
|
|
char *outbuf;
|
|
u_short *outlen;
|
|
ino_t *inump;
|
|
struct iso_mnt *imp;
|
|
{
|
|
ISO_RRIP_ANALYZE analyze;
|
|
RRIP_TABLE *tab;
|
|
|
|
analyze.outbuf = outbuf;
|
|
analyze.outlen = outlen;
|
|
analyze.maxlen = NAME_MAX;
|
|
analyze.inump = inump;
|
|
analyze.imp = imp;
|
|
analyze.fields = ISO_SUSP_ALTNAME|ISO_SUSP_RELDIR|ISO_SUSP_CLINK|ISO_SUSP_PLINK;
|
|
*outlen = 0;
|
|
|
|
tab = rrip_table_getname;
|
|
if (*isodir->name == 0
|
|
|| *isodir->name == 1) {
|
|
cd9660_rrip_defname(isodir,&analyze);
|
|
|
|
analyze.fields &= ~ISO_SUSP_ALTNAME;
|
|
tab++;
|
|
}
|
|
|
|
return cd9660_rrip_loop(isodir,&analyze,tab);
|
|
}
|
|
|
|
/*
|
|
* Get Symbolic Name from 'SL' record
|
|
*
|
|
* Note: isodir should contains SL record!
|
|
*/
|
|
static RRIP_TABLE rrip_table_getsymname[] = {
|
|
{ "SL", cd9660_rrip_slink, 0, ISO_SUSP_SLINK },
|
|
{ "RR", cd9660_rrip_idflag, 0, ISO_SUSP_IDFLAG },
|
|
{ "CE", cd9660_rrip_cont, 0, ISO_SUSP_CONT },
|
|
{ "ST", cd9660_rrip_stop, 0, ISO_SUSP_STOP },
|
|
{ "", 0, 0, 0 }
|
|
};
|
|
|
|
int
|
|
cd9660_rrip_getsymname(isodir,outbuf,outlen,imp)
|
|
struct iso_directory_record *isodir;
|
|
char *outbuf;
|
|
u_short *outlen;
|
|
struct iso_mnt *imp;
|
|
{
|
|
ISO_RRIP_ANALYZE analyze;
|
|
|
|
analyze.outbuf = outbuf;
|
|
analyze.outlen = outlen;
|
|
*outlen = 0;
|
|
analyze.maxlen = MAXPATHLEN;
|
|
analyze.cont = 1; /* don't start with a slash */
|
|
analyze.imp = imp;
|
|
analyze.fields = ISO_SUSP_SLINK;
|
|
|
|
return (cd9660_rrip_loop(isodir,&analyze,rrip_table_getsymname)&ISO_SUSP_SLINK);
|
|
}
|
|
|
|
static RRIP_TABLE rrip_table_extref[] = {
|
|
{ "ER", cd9660_rrip_extref, 0, ISO_SUSP_EXTREF },
|
|
{ "CE", cd9660_rrip_cont, 0, ISO_SUSP_CONT },
|
|
{ "ST", cd9660_rrip_stop, 0, ISO_SUSP_STOP },
|
|
{ "", 0, 0, 0 }
|
|
};
|
|
|
|
/*
|
|
* Check for Rock Ridge Extension and return offset of its fields.
|
|
* Note: We require the ER field.
|
|
*/
|
|
int
|
|
cd9660_rrip_offset(isodir,imp)
|
|
struct iso_directory_record *isodir;
|
|
struct iso_mnt *imp;
|
|
{
|
|
ISO_RRIP_OFFSET *p;
|
|
ISO_RRIP_ANALYZE analyze;
|
|
|
|
imp->rr_skip0 = 0;
|
|
p = (ISO_RRIP_OFFSET *)(isodir->name + 1);
|
|
if (bcmp(p,"SP\7\1\276\357",6)) {
|
|
/* Maybe, it's a CDROM XA disc? */
|
|
imp->rr_skip0 = 15;
|
|
p = (ISO_RRIP_OFFSET *)((char *)p + 15);
|
|
if (bcmp(p,"SP\7\1\276\357",6))
|
|
return -1;
|
|
}
|
|
|
|
analyze.imp = imp;
|
|
analyze.fields = ISO_SUSP_EXTREF;
|
|
if (!(cd9660_rrip_loop(isodir,&analyze,rrip_table_extref)&ISO_SUSP_EXTREF))
|
|
return -1;
|
|
|
|
return isonum_711(p->skip);
|
|
}
|