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NetBSD/sys/isofs/cd9660/cd9660_rrip.c

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/* $NetBSD: cd9660_rrip.c,v 1.19 1999/07/13 11:12:06 scw Exp $ */
/*-
* Copyright (c) 1993, 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_rrip.c 8.6 (Berkeley) 12/5/94
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/buf.h>
#include <sys/file.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/kernel.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/time.h>
#include <isofs/cd9660/iso.h>
#include <isofs/cd9660/cd9660_extern.h>
#include <isofs/cd9660/cd9660_node.h>
#include <isofs/cd9660/cd9660_rrip.h>
#include <isofs/cd9660/iso_rrip.h>
typedef struct {
char type[2];
int (*func) __P((void *, ISO_RRIP_ANALYZE *));
void (*func2) __P((void *, ISO_RRIP_ANALYZE *));
int result;
} RRIP_TABLE;
static int cd9660_rrip_attr __P((void *, ISO_RRIP_ANALYZE *));
static void cd9660_rrip_defattr __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_slink __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_altname __P((void *, ISO_RRIP_ANALYZE *));
static void cd9660_rrip_defname __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_pclink __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_reldir __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_tstamp __P((void *, ISO_RRIP_ANALYZE *));
static void cd9660_rrip_deftstamp __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_device __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_idflag __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_cont __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_stop __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_extref __P((void *, ISO_RRIP_ANALYZE *));
static int cd9660_rrip_loop __P((struct iso_directory_record *,
ISO_RRIP_ANALYZE *, RRIP_TABLE *));
/*
* POSIX file attribute
*/
static int
cd9660_rrip_attr(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
ISO_RRIP_ATTR *p = v;
ana->inop->inode.iso_mode = isonum_733(p->mode);
ana->inop->inode.iso_uid = isonum_733(p->uid);
ana->inop->inode.iso_gid = isonum_733(p->gid);
ana->inop->inode.iso_links = isonum_733(p->links);
ana->fields &= ~ISO_SUSP_ATTR;
return ISO_SUSP_ATTR;
}
static void
cd9660_rrip_defattr(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
struct iso_directory_record *isodir = v;
/* But this is a required field! */
printf("RRIP without PX field?\n");
cd9660_defattr(isodir, ana->inop, NULL);
}
/*
* Symbolic Links
*/
static int
cd9660_rrip_slink(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
ISO_RRIP_SLINK *p = v;
register ISO_RRIP_SLINK_COMPONENT *pcomp;
register ISO_RRIP_SLINK_COMPONENT *pcompe;
int len, wlen, cont;
char *outbuf, *inbuf;
pcomp = (ISO_RRIP_SLINK_COMPONENT *)p->component;
pcompe = (ISO_RRIP_SLINK_COMPONENT *)
((char *)p + isonum_711(p->h.length));
len = *ana->outlen;
outbuf = ana->outbuf;
cont = ana->cont;
/*
* Gathering a Symbolic name from each component with path
*/
for (;
pcomp < pcompe;
pcomp = (ISO_RRIP_SLINK_COMPONENT *)((char *)pcomp + ISO_RRIP_SLSIZ
+ isonum_711(pcomp->clen))) {
if (!cont) {
if (len < ana->maxlen) {
len++;
*outbuf++ = '/';
}
}
cont = 0;
inbuf = "..";
wlen = 0;
switch (*pcomp->cflag) {
case ISO_SUSP_CFLAG_CURRENT:
/* Inserting Current */
wlen = 1;
break;
case ISO_SUSP_CFLAG_PARENT:
/* Inserting Parent */
wlen = 2;
break;
case ISO_SUSP_CFLAG_ROOT:
/* Inserting slash for ROOT */
/* start over from beginning(?) */
outbuf -= len;
len = 0;
break;
case ISO_SUSP_CFLAG_VOLROOT:
/* Inserting a mount point i.e. "/cdrom" */
/* same as above */
outbuf -= len;
len = 0;
inbuf = ana->imp->im_mountp->mnt_stat.f_mntonname;
wlen = strlen(inbuf);
break;
case ISO_SUSP_CFLAG_HOST:
/* Inserting hostname i.e. "kurt.tools.de" */
inbuf = hostname;
wlen = hostnamelen;
break;
case ISO_SUSP_CFLAG_CONTINUE:
cont = 1;
/* fall thru */
case 0:
/* Inserting component */
wlen = isonum_711(pcomp->clen);
inbuf = pcomp->name;
break;
default:
printf("RRIP with incorrect flags?");
wlen = ana->maxlen + 1;
break;
}
if (len + wlen > ana->maxlen) {
/* indicate error to caller */
ana->cont = 1;
ana->fields = 0;
ana->outbuf -= *ana->outlen;
*ana->outlen = 0;
return 0;
}
memcpy(outbuf, inbuf, wlen);
outbuf += wlen;
len += wlen;
}
ana->outbuf = outbuf;
*ana->outlen = len;
ana->cont = cont;
if (!isonum_711(p->flags)) {
ana->fields &= ~ISO_SUSP_SLINK;
return ISO_SUSP_SLINK;
}
return 0;
}
/*
* Alternate name
*/
static int
cd9660_rrip_altname(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
ISO_RRIP_ALTNAME *p = v;
char *inbuf;
int wlen;
int cont;
inbuf = "..";
wlen = 0;
cont = 0;
switch (*p->flags) {
case ISO_SUSP_CFLAG_CURRENT:
/* Inserting Current */
wlen = 1;
break;
case ISO_SUSP_CFLAG_PARENT:
/* Inserting Parent */
wlen = 2;
break;
case ISO_SUSP_CFLAG_HOST:
/* Inserting hostname i.e. "kurt.tools.de" */
inbuf = hostname;
wlen = hostnamelen;
break;
case ISO_SUSP_CFLAG_CONTINUE:
cont = 1;
/* fall thru */
case 0:
/* Inserting component */
wlen = isonum_711(p->h.length) - 5;
inbuf = (char *)p + 5;
break;
default:
printf("RRIP with incorrect NM flags?\n");
wlen = ana->maxlen + 1;
break;
}
if ((*ana->outlen += wlen) > ana->maxlen) {
/* treat as no name field */
ana->fields &= ~ISO_SUSP_ALTNAME;
ana->outbuf -= *ana->outlen - wlen;
*ana->outlen = 0;
return 0;
}
memcpy(ana->outbuf, inbuf, wlen);
ana->outbuf += wlen;
if (!cont) {
ana->fields &= ~ISO_SUSP_ALTNAME;
return ISO_SUSP_ALTNAME;
}
return 0;
}
static void
cd9660_rrip_defname(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
struct iso_directory_record *isodir = v;
isofntrans(isodir->name, isonum_711(isodir->name_len),
ana->outbuf, ana->outlen,
1, isonum_711(isodir->flags) & 4,
ana->imp->im_joliet_level);
switch (ana->outbuf[0]) {
default:
break;
case 0:
ana->outbuf[0] = '.';
*ana->outlen = 1;
break;
case 1:
strcpy(ana->outbuf, "..");
*ana->outlen = 2;
break;
}
}
/*
* Parent or Child Link
*/
static int
cd9660_rrip_pclink(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
ISO_RRIP_CLINK *p = v;
*ana->inump = isonum_733(p->dir_loc) << ana->imp->im_bshift;
ana->fields &= ~(ISO_SUSP_CLINK | ISO_SUSP_PLINK);
return *p->h.type == 'C' ? ISO_SUSP_CLINK : ISO_SUSP_PLINK;
}
/*
* Relocated directory
*/
/*ARGSUSED*/
static int
cd9660_rrip_reldir(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
/* special hack to make caller aware of RE field */
*ana->outlen = 0;
ana->fields = 0;
return ISO_SUSP_RELDIR | ISO_SUSP_ALTNAME
| ISO_SUSP_CLINK | ISO_SUSP_PLINK;
}
static int
cd9660_rrip_tstamp(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
ISO_RRIP_TSTAMP *p = v;
u_char *ptime;
ptime = p->time;
/* Check a format of time stamp (7bytes/17bytes) */
if (!(*p->flags & ISO_SUSP_TSTAMP_FORM17)) {
if (*p->flags & ISO_SUSP_TSTAMP_CREAT)
ptime += 7;
if (*p->flags & ISO_SUSP_TSTAMP_MODIFY) {
cd9660_tstamp_conv7(ptime, &ana->inop->inode.iso_mtime);
ptime += 7;
} else
memset(&ana->inop->inode.iso_mtime, 0, sizeof(struct timespec));
if (*p->flags & ISO_SUSP_TSTAMP_ACCESS) {
cd9660_tstamp_conv7(ptime, &ana->inop->inode.iso_atime);
ptime += 7;
} else
ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
if (*p->flags & ISO_SUSP_TSTAMP_ATTR)
cd9660_tstamp_conv7(ptime, &ana->inop->inode.iso_ctime);
else
ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
} else {
if (*p->flags & ISO_SUSP_TSTAMP_CREAT)
ptime += 17;
if (*p->flags & ISO_SUSP_TSTAMP_MODIFY) {
cd9660_tstamp_conv17(ptime, &ana->inop->inode.iso_mtime);
ptime += 17;
} else
memset(&ana->inop->inode.iso_mtime, 0, sizeof(struct timespec));
if (*p->flags & ISO_SUSP_TSTAMP_ACCESS) {
cd9660_tstamp_conv17(ptime, &ana->inop->inode.iso_atime);
ptime += 17;
} else
ana->inop->inode.iso_atime = ana->inop->inode.iso_mtime;
if (*p->flags & ISO_SUSP_TSTAMP_ATTR)
cd9660_tstamp_conv17(ptime, &ana->inop->inode.iso_ctime);
else
ana->inop->inode.iso_ctime = ana->inop->inode.iso_mtime;
}
ana->fields &= ~ISO_SUSP_TSTAMP;
return ISO_SUSP_TSTAMP;
}
static void
cd9660_rrip_deftstamp(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
struct iso_directory_record *isodir = v;
cd9660_deftstamp(isodir, ana->inop, NULL);
}
/*
* POSIX device modes
*/
static int
cd9660_rrip_device(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
ISO_RRIP_DEVICE *p = v;
u_int high, low;
high = isonum_733(p->dev_t_high);
low = isonum_733(p->dev_t_low);
if (high == 0)
ana->inop->inode.iso_rdev = makedev(major(low), minor(low));
else
ana->inop->inode.iso_rdev = makedev(high, minor(low));
ana->fields &= ~ISO_SUSP_DEVICE;
return ISO_SUSP_DEVICE;
}
/*
* Flag indicating
*/
static int
cd9660_rrip_idflag(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
ISO_RRIP_IDFLAG *p = v;
ana->fields &= isonum_711(p->flags) | ~0xff; /* don't touch high bits */
/* special handling of RE field */
if (ana->fields & ISO_SUSP_RELDIR)
return cd9660_rrip_reldir(p, ana);
return ISO_SUSP_IDFLAG;
}
/*
* Continuation pointer
*/
static int
cd9660_rrip_cont(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
ISO_RRIP_CONT *p = v;
ana->iso_ce_blk = isonum_733(p->location);
ana->iso_ce_off = isonum_733(p->offset);
ana->iso_ce_len = isonum_733(p->length);
return ISO_SUSP_CONT;
}
/*
* System Use end
*/
static int
cd9660_rrip_stop(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
return ISO_SUSP_STOP;
}
/*
* Extension reference
*/
static int
cd9660_rrip_extref(v, ana)
void *v;
ISO_RRIP_ANALYZE *ana;
{
ISO_RRIP_EXTREF *p = v;
if (isonum_711(p->version) != 1)
return 0;
if (isonum_711(p->len_id) != 9
&& isonum_711(p->len_id) != 10)
return 0;
if (isonum_711(p->len_id) == 9
&& memcmp((char *)p + 8, "IEEE_1282", 9))
return 0;
if (isonum_711(p->len_id) == 10
&& memcmp((char *)p + 8, "IEEE_P1282", 10)
&& memcmp((char *)p + 8, "RRIP_1991A", 10))
return 0;
ana->fields &= ~ISO_SUSP_EXTREF;
return ISO_SUSP_EXTREF;
}
static int
cd9660_rrip_loop(isodir, ana, table)
struct iso_directory_record *isodir;
ISO_RRIP_ANALYZE *ana;
RRIP_TABLE *table;
{
register RRIP_TABLE *ptable;
register ISO_SUSP_HEADER *phead;
register ISO_SUSP_HEADER *pend;
struct buf *bp = NULL;
char *pwhead;
u_char c;
int result;
/*
* Note: If name length is odd,
* it will be padded by 1 byte after the name
*/
pwhead = isodir->name + isonum_711(isodir->name_len);
if (!(isonum_711(isodir->name_len) & 1))
pwhead++;
isochar(isodir->name, pwhead, ana->imp->im_joliet_level, &c);
/* If it's not the '.' entry of the root dir obey SP field */
if (c != 0 || isonum_733(isodir->extent) != ana->imp->root_extent)
pwhead += ana->imp->rr_skip;
else
pwhead += ana->imp->rr_skip0;
phead = (ISO_SUSP_HEADER *)pwhead;
pend = (ISO_SUSP_HEADER *)((char *)isodir + isonum_711(isodir->length));
result = 0;
while (1) {
ana->iso_ce_len = 0;
/*
* Note: "pend" should be more than one SUSP header
*/
while (pend >= phead + 1) {
if (isonum_711(phead->version) == 1) {
for (ptable = table; ptable->func; ptable++) {
if (*phead->type == *ptable->type
&& phead->type[1] == ptable->type[1]) {
result |= ptable->func(phead, ana);
break;
}
}
if (!ana->fields)
break;
}
if (result & ISO_SUSP_STOP) {
result &= ~ISO_SUSP_STOP;
break;
}
/* plausibility check */
if (isonum_711(phead->length) < sizeof(*phead))
break;
/*
* move to next SUSP
* Hopefully this works with newer versions, too
*/
phead = (ISO_SUSP_HEADER *)((char *)phead + isonum_711(phead->length));
}
if (ana->fields && ana->iso_ce_len) {
if (ana->iso_ce_blk >= ana->imp->volume_space_size
|| ana->iso_ce_off + ana->iso_ce_len > ana->imp->logical_block_size
|| bread(ana->imp->im_devvp,
ana->iso_ce_blk << (ana->imp->im_bshift - DEV_BSHIFT),
ana->imp->logical_block_size, NOCRED, &bp))
/* what to do now? */
break;
phead = (ISO_SUSP_HEADER *)(bp->b_data + 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;
}
/*
* Get Attributes.
*/
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.
*/
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;
u_char c;
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;
isochar(isodir->name, isodir->name + isonum_711(isodir->name_len),
imp->im_joliet_level, &c);
tab = rrip_table_getname;
if (c == 0 || c == 1) {
cd9660_rrip_defname(isodir, &analyze);
analyze.fields &= ~ISO_SUSP_ALTNAME;
tab++;
}
return cd9660_rrip_loop(isodir, &analyze, tab);
}
/*
* Get Symbolic Link.
*/
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 insist on 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 (memcmp(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 (memcmp(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);
}
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