/*
 * This file has been modified for the cdrkit suite.
 *
 * The behaviour and appearence of the program code below can differ to a major
 * extent from the version distributed by the original author(s).
 *
 * For details, see Changelog file distributed with the cdrkit package. If you
 * received this file from another source then ask the distributing person for
 * a log of modifications.
 *
 */

/* @(#)isovfy.c	1.26 05/05/15 joerg */
/*
 * File isovfy.c - verify consistency of iso9660 filesystem.
 *
 *
 * Written by Eric Youngdale (1993).
 *
 * Copyright 1993 Yggdrasil Computing, Incorporated
 * Copyright (c) 1999-2004 J. Schilling
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; see the file COPYING.  If not, write to the Free Software
 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <mconfig.h>
#include <stdxlib.h>
#include <unixstd.h>
#include <strdefs.h>
#include <utypes.h>

#include <stdio.h>
#include <standard.h>
#include <signal.h>
#include <schily.h>

#include "../scsi.h"
#include "../../wodim/defaults.h"

/*
 * XXX JS: Some structures have odd lengths!
 * Some compilers (e.g. on Sun3/mc68020) padd the structures to even length.
 * For this reason, we cannot use sizeof (struct iso_path_table) or
 * sizeof (struct iso_directory_record) to compute on disk sizes.
 * Instead, we use offsetof(..., name) and add the name size.
 * See iso9660.h
 */
#ifndef	offsetof
#define	offsetof(TYPE, MEMBER)	((size_t) &((TYPE *)0)->MEMBER)
#endif

/*
 * Note: always use these macros to avoid problems.
 *
 * ISO_ROUND_UP(X)	may cause an integer overflow and thus give
 *			incorrect results. So avoid it if possible.
 *
 * ISO_BLOCKS(X)	is overflow safe. Prefer this when ever it is possible.
 */
#define	SECTOR_SIZE	(2048)
#define	ISO_ROUND_UP(X)	(((X) + (SECTOR_SIZE - 1)) & ~(SECTOR_SIZE - 1))
#define	ISO_BLOCKS(X)	(((X) / SECTOR_SIZE) + (((X)%SECTOR_SIZE)?1:0))

#define	infile	in_image
FILE *infile = NULL;
int blocksize;

#define	PAGE	sizeof (buffer)

#define	ISODCL(from, to)	(to - from + 1)

struct iso_primary_descriptor {
	unsigned char type			[ISODCL(1,   1)]; /* 711 */
	unsigned char id			[ISODCL(2,   6)];
	unsigned char version			[ISODCL(7,   7)]; /* 711 */
	unsigned char unused1			[ISODCL(8,   8)];
	unsigned char system_id			[ISODCL(9,   40)]; /* aunsigned chars */
	unsigned char volume_id			[ISODCL(41,  72)]; /* dunsigned chars */
	unsigned char unused2			[ISODCL(73,  80)];
	unsigned char volume_space_size		[ISODCL(81,  88)]; /* 733 */
	unsigned char unused3			[ISODCL(89,  120)];
	unsigned char volume_set_size		[ISODCL(121, 124)]; /* 723 */
	unsigned char volume_sequence_number	[ISODCL(125, 128)]; /* 723 */
	unsigned char logical_block_size	[ISODCL(129, 132)]; /* 723 */
	unsigned char path_table_size		[ISODCL(133, 140)]; /* 733 */
	unsigned char type_l_path_table		[ISODCL(141, 144)]; /* 731 */
	unsigned char opt_type_l_path_table	[ISODCL(145, 148)]; /* 731 */
	unsigned char type_m_path_table		[ISODCL(149, 152)]; /* 732 */
	unsigned char opt_type_m_path_table	[ISODCL(153, 156)]; /* 732 */
	unsigned char root_directory_record	[ISODCL(157, 190)]; /* 9.1 */
	unsigned char volume_set_id		[ISODCL(191, 318)]; /* dunsigned chars */
	unsigned char publisher_id		[ISODCL(319, 446)]; /* achars */
	unsigned char preparer_id		[ISODCL(447, 574)]; /* achars */
	unsigned char application_id		[ISODCL(575, 702)]; /* achars */
	unsigned char copyright_file_id		[ISODCL(703, 739)]; /* 7.5 dchars */
	unsigned char abstract_file_id		[ISODCL(740, 776)]; /* 7.5 dchars */
	unsigned char bibliographic_file_id	[ISODCL(777, 813)]; /* 7.5 dchars */
	unsigned char creation_date		[ISODCL(814, 830)]; /* 8.4.26.1 */
	unsigned char modification_date		[ISODCL(831, 847)]; /* 8.4.26.1 */
	unsigned char expiration_date		[ISODCL(848, 864)]; /* 8.4.26.1 */
	unsigned char effective_date		[ISODCL(865, 881)]; /* 8.4.26.1 */
	unsigned char file_structure_version	[ISODCL(882, 882)]; /* 711 */
	unsigned char unused4			[ISODCL(883, 883)];
	unsigned char application_data		[ISODCL(884, 1395)];
	unsigned char unused5			[ISODCL(1396, 2048)];
};

struct iso_directory_record {
	unsigned char length			[ISODCL(1, 1)]; /* 711 */
	unsigned char ext_attr_length		[ISODCL(2, 2)]; /* 711 */
	unsigned char extent			[ISODCL(3, 10)]; /* 733 */
	unsigned char size			[ISODCL(11, 18)]; /* 733 */
	unsigned char date			[ISODCL(19, 25)]; /* 7 by 711 */
	unsigned char flags			[ISODCL(26, 26)];
	unsigned char file_unit_size		[ISODCL(27, 27)]; /* 711 */
	unsigned char interleave		[ISODCL(28, 28)]; /* 711 */
	unsigned char volume_sequence_number	[ISODCL(29, 32)]; /* 723 */
	unsigned char name_len			[ISODCL(33, 33)]; /* 711 */
	unsigned char name			[38];
};

static int	isonum_721(char * p);
static int	isonum_723(char * p);
static int	isonum_711(char * p);
static int	isonum_731(char * p);
static int	isonum_722(char * p);
static int	isonum_732(char * p);
static int	isonum_733(unsigned char * p);
static int	parse_rr(unsigned char * pnt, int len, int cont_flag);
static int	dump_rr(struct iso_directory_record * idr);
static void	check_tree(off_t file_addr, int file_size, off_t parent_addr);
static void	check_path_tables(int typel_extent, int typem_extent, 
										int path_table_size);
static void	usage(int excode);

static int
isonum_721(char *p)
{
	return ((p[0] & 0xff) | ((p[1] & 0xff) << 8));
}

static int
isonum_723(char *p)
{
#if 0
	if (p[0] != p[3] || p[1] != p[2]) {
#ifdef	USE_LIBSCHILY
		comerrno(EX_BAD, "invalid format 7.2.3 number\n");
#else
		fprintf(stderr, "invalid format 7.2.3 number\n");
		exit(1);
#endif
	}
#endif
	return (isonum_721(p));
}

static int
isonum_711(char *p)
{
	return (*p & 0xff);
}

static int
isonum_731(char *p)
{
	return ((p[0] & 0xff)
		| ((p[1] & 0xff) << 8)
		| ((p[2] & 0xff) << 16)
		| ((p[3] & 0xff) << 24));
}

static int
isonum_722(char *p)
{
	return ((p[1] & 0xff)
		| ((p[0] & 0xff) << 8));
}

static int
isonum_732(char *p)
{
	return ((p[3] & 0xff)
		| ((p[2] & 0xff) << 8)
		| ((p[1] & 0xff) << 16)
		| ((p[0] & 0xff) << 24));
}

static int
isonum_733(unsigned char *p)
{
	return (isonum_731((char *)p));
}

char	lbuffer[1024];
int	iline;
int	rr_goof;


static int
parse_rr(unsigned char *pnt, int len, int cont_flag)
{
	int		slen;
	int		ncount;
	int		flag1;
	int		flag2;
	int		extent;
	unsigned char	*pnts;
	off_t		cont_extent;
	int		cont_offset;
	int		cont_size;
	char		symlinkname[1024];

	sprintf(lbuffer+iline, " RRlen=%d ", len);
	iline += strlen(lbuffer+iline);

	cont_extent = (off_t)0;
	cont_offset = cont_size = 0;

	symlinkname[0] = 0;

	ncount = 0;
	flag1 = flag2 = 0;
	while (len >= 4) {
		if (ncount)
			sprintf(lbuffer+iline, ",");
		else
			sprintf(lbuffer+iline, "[");
		iline += strlen(lbuffer + iline);
		sprintf(lbuffer+iline, "%c%c", pnt[0], pnt[1]);
		iline += strlen(lbuffer + iline);
		if (pnt[0] < 'A' || pnt[0] > 'Z' || pnt[1] < 'A' ||
		    pnt[1] > 'Z') {
			sprintf(lbuffer+iline, "**BAD SUSP %d %d]",
					pnt[0], pnt[1]);
			rr_goof++;
			iline += strlen(lbuffer + iline);
			return (flag2);
		}

		if (pnt[3] != 1 && pnt[3] != 2) {
			sprintf(lbuffer+iline, "**BAD RRVERSION (%d)\n", pnt[3]);
			rr_goof++;
			iline += strlen(lbuffer + iline);
			return (flag2);
		}
		ncount++;
		if (pnt[0] == 'R' && pnt[1] == 'R') flag1 = pnt[4] & 0xff;
		if (strncmp((char *)pnt, "PX", 2) == 0) flag2 |= 1;
		if (strncmp((char *)pnt, "PN", 2) == 0) flag2 |= 2;
		if (strncmp((char *)pnt, "SL", 2) == 0) flag2 |= 4;
		if (strncmp((char *)pnt, "NM", 2) == 0) flag2 |= 8;
		if (strncmp((char *)pnt, "CL", 2) == 0) flag2 |= 16;
		if (strncmp((char *)pnt, "PL", 2) == 0) flag2 |= 32;
		if (strncmp((char *)pnt, "RE", 2) == 0) flag2 |= 64;
		if (strncmp((char *)pnt, "TF", 2) == 0) flag2 |= 128;

		if (strncmp((char *)pnt, "CE", 2) == 0) {
			cont_extent = (off_t)isonum_733(pnt+4);
			cont_offset = isonum_733(pnt+12);
			cont_size = isonum_733(pnt+20);
			sprintf(lbuffer+iline, "=[%x,%x,%d]",
					(int)cont_extent, cont_offset, cont_size);
			iline += strlen(lbuffer + iline);
		}

		if (strncmp((char *)pnt, "PL", 2) == 0 || strncmp((char *)pnt, "CL", 2) == 0) {
			extent = isonum_733(pnt+4);
			sprintf(lbuffer+iline, "=%x", extent);
			iline += strlen(lbuffer + iline);
			if (extent == 0)
				rr_goof++;
		}
		if (strncmp((char *)pnt, "SL", 2) == 0) {
			pnts = pnt+5;
			slen = pnt[2] - 5;
			while (slen >= 1) {
				switch (pnts[0] & 0xfe) {
				case 0:
					strncat(symlinkname, (char *)(pnts+2), pnts[1]);
					break;
				case 2:
					strcat(symlinkname, ".");
					break;
				case 4:
					strcat(symlinkname, "..");
					break;
				case 8:
					strcat(symlinkname, "/");
					break;
				case 16:
					strcat(symlinkname, "/mnt");
					sprintf(lbuffer+iline, "Warning - mount point requested");
					iline += strlen(lbuffer + iline);
					break;
				case 32:
					strcat(symlinkname, "kafka");
					sprintf(lbuffer+iline, "Warning - host_name requested");
					iline += strlen(lbuffer + iline);
					break;
				default:
					sprintf(lbuffer+iline, "Reserved bit setting in symlink");
					rr_goof++;
					iline += strlen(lbuffer + iline);
					break;
				}
				if ((pnts[0] & 0xfe) && pnts[1] != 0) {
					sprintf(lbuffer+iline, "Incorrect length in symlink component");
					iline += strlen(lbuffer + iline);
				}
				if ((pnts[0] & 1) == 0)
					strcat(symlinkname, "/");
				slen -= (pnts[1] + 2);
				pnts += (pnts[1] + 2);
			}
			if (symlinkname[0] != 0) {
				sprintf(lbuffer+iline, "=%s", symlinkname);
				iline += strlen(lbuffer + iline);
				symlinkname[0] = 0;
			}
		}

		len -= pnt[2];
		pnt += pnt[2];
		if (len <= 3 && cont_extent) {
			unsigned char sector[2048];
#ifdef	USE_SCG
			readsecs(cont_extent * blocksize / 2048, sector, ISO_BLOCKS(sizeof (sector)));
#else
			lseek(fileno(infile), cont_extent * blocksize, SEEK_SET);
			read(fileno(infile), sector, sizeof (sector));
#endif
			flag2 |= parse_rr(&sector[cont_offset], cont_size, 1);
		}
	}
	if (ncount) {
		sprintf(lbuffer+iline, "]");
		iline += strlen(lbuffer + iline);
	}
	if (!cont_flag && flag1 && flag1 != flag2) {
		sprintf(lbuffer+iline, "Flag %x != %x", flag1, flag2);
		rr_goof++;
		iline += strlen(lbuffer + iline);
	}
	return (flag2);
}

static int
dump_rr(struct iso_directory_record *idr)
{
	int len;
	char * pnt;

	len = idr->length[0] & 0xff;
	len -= offsetof(struct iso_directory_record, name[0]);
	len -= idr->name_len[0];
	pnt = (char *) idr;
	pnt += offsetof(struct iso_directory_record, name[0]);
	pnt += idr->name_len[0];

	if ((idr->name_len[0] & 1) == 0) {
		pnt++;
		len--;
	}

	rr_goof = 0;
	parse_rr((unsigned char *)pnt, len, 0);
	return (rr_goof);
}


static int	dir_count = 0;
static int	dir_size_count = 0;
static int	ngoof = 0;

static void
check_tree(off_t file_addr, int file_size, off_t parent_addr)
{
	unsigned char	buffer[2048];
	unsigned int	k;
	int		rflag = 0;
	int		i;
	int		i1;
	int		j;
	int		goof;
	int		extent;
	int		size;
	off_t		orig_file_addr;
	off_t		parent_file_addr;
	struct iso_directory_record	*idr;

	i1 = 0;

	orig_file_addr = file_addr / blocksize;  /* Actual extent of this directory */
	parent_file_addr = parent_addr / blocksize;

	if ((dir_count % 100) == 0)
		printf("[%d %d]\n", dir_count, dir_size_count);
#if 0
	if (sizeof (file_addr) > sizeof (long)) {
		printf("Starting directory %ld %d %lld\n",
				file_addr, file_size,
				(Llong)parent_addr);
	} else {
		printf("Starting directory %ld %d %ld\n", file_addr, file_size, parent_addr);
	}
#endif

	dir_count++;
	dir_size_count += file_size / blocksize;

	if (file_size & 0x3ff)
		printf("********Directory has unusual size\n");

	for (k = 0; k < (file_size / sizeof (buffer)); k++) {
#ifdef	USE_SCG
		readsecs(file_addr / 2048, buffer, ISO_BLOCKS(sizeof (buffer)));
#else
		lseek(fileno(infile), file_addr, SEEK_SET);
		read(fileno(infile), buffer, sizeof (buffer));
#endif
		i = 0;
		while (1 == 1) {
			goof = iline = 0;
			idr = (struct iso_directory_record *) &buffer[i];
			if (idr->length[0] == 0) break;
			sprintf(&lbuffer[iline], "%3d ", idr->length[0]);
			iline += strlen(lbuffer + iline);
			extent = isonum_733(idr->extent);
			size = isonum_733(idr->size);
			sprintf(&lbuffer[iline], "%5x ", extent);
			iline += strlen(lbuffer + iline);
			sprintf(&lbuffer[iline], "%8d ", size);
			iline += strlen(lbuffer + iline);
			sprintf(&lbuffer[iline], "%c", (idr->flags[0] & 2) ? '*' : ' ');
			iline += strlen(lbuffer + iline);

			if (idr->name_len[0] > 33) {
				sprintf(&lbuffer[iline], "File name length=(%d)",
							idr->name_len[0]);
				goof++;
				iline += strlen(lbuffer + iline);
			} else if (idr->name_len[0] == 1 && idr->name[0] == 0) {
				sprintf(&lbuffer[iline], ".             ");
				iline += strlen(lbuffer + iline);
				rflag = 0;
				if (orig_file_addr != (off_t)(isonum_733(idr->extent) + isonum_711((char *) idr->ext_attr_length))) {
					sprintf(&lbuffer[iline], "***** Directory has null extent.");
					goof++;
					iline += strlen(lbuffer + iline);
				}
				if (i1) {
					sprintf(&lbuffer[iline], "***** . not  first entry.");
					rr_goof++;
					iline += strlen(lbuffer + iline);
				}
			} else if (idr->name_len[0] == 1 && idr->name[0] == 1) {
				sprintf(&lbuffer[iline], "..            ");
				iline += strlen(lbuffer + iline);
				rflag = 0;
				if (parent_file_addr != (off_t)(isonum_733(idr->extent) + isonum_711((char *) idr->ext_attr_length))) {
					sprintf(&lbuffer[iline], "***** Directory has null extent.");
					goof++;
					iline += strlen(lbuffer + iline);
				}
				if (i1 != 1) {
					sprintf(&lbuffer[iline], "***** .. not second entry.");
					rr_goof++;
					iline += strlen(lbuffer + iline);
				}
			} else {
				if (i1 < 2) {
					sprintf(&lbuffer[iline], " Improper sorting.");
					rr_goof++;
				}
				for (j = 0; j < (int)idr->name_len[0]; j++) {
					sprintf(&lbuffer[iline], "%c", idr->name[j]);
				}
				for (j = 0; j < (14 - (int) idr->name_len[0]); j++) {
					sprintf(&lbuffer[iline], " ");
					iline += strlen(lbuffer + iline);
				}
				rflag = 1;
			}

			if (size && extent == 0) {
				sprintf(&lbuffer[iline], "****Extent==0, size != 0");
				goof++;
				iline += strlen(lbuffer + iline);
			}
#if 0
			/* This is apparently legal. */
			if (size == 0 && extent) {
				sprintf(&lbuffer[iline], "****Extent!=0, size == 0");
				goof++;
				iline += strlen(lbuffer + iline);
			}
#endif

			if (idr->flags[0] & 0xf5) {
				sprintf(&lbuffer[iline], "Flags=(%x) ", idr->flags[0]);
				goof++;
				iline += strlen(lbuffer + iline);
			}
			if (idr->interleave[0]) {
				sprintf(&lbuffer[iline], "Interleave=(%d) ", idr->interleave[0]);
				goof++;
				iline += strlen(lbuffer + iline);
			}

			if (idr->file_unit_size[0]) {
				sprintf(&lbuffer[iline], "File unit size=(%d) ", idr->file_unit_size[0]);
				goof++;
				iline += strlen(lbuffer + iline);
			}

			if (idr->volume_sequence_number[0] != 1) {
				sprintf(&lbuffer[iline], "Volume sequence number=(%d) ", idr->volume_sequence_number[0]);
				goof++;
				iline += strlen(lbuffer + iline);
			}

			goof += dump_rr(idr);
			sprintf(&lbuffer[iline], "\n");
			iline += strlen(lbuffer + iline);


			if (goof) {
				ngoof++;
				lbuffer[iline++] = 0;
				if (sizeof (orig_file_addr) > sizeof (long)) {
					printf("%llx: %s", (Llong)orig_file_addr, lbuffer);
				} else {
					printf("%lx: %s", (long)orig_file_addr, lbuffer);
				}
			}



			if (rflag && (idr->flags[0] & 2))
				check_tree((off_t)(isonum_733(idr->extent) + isonum_711((char *)idr->ext_attr_length)) * blocksize,
						isonum_733(idr->size),
						orig_file_addr * blocksize);
			i += buffer[i];
			i1++;
			if (i > 2048 - offsetof(struct iso_directory_record, name[0]))
				break;
		}
		file_addr += sizeof (buffer);
	}
	fflush(stdout);
}


/*
 * This function simply dumps the contents of the path tables.  No
 * consistency checking takes place, although this would proably be a good
 * idea.
 */
struct path_table_info {
	char		*name;
	unsigned int	extent;
	unsigned short	index;
	unsigned short	parent;
};

static void
check_path_tables(int typel_extent, int typem_extent, int path_table_size)
{
	int	count;
	int	j;
	char	*pnt;
	char	*typel;
	char	*typem;

	/* Now read in the path tables */

	typel = (char *) malloc(ISO_ROUND_UP(path_table_size));
#ifdef	USE_SCG
	readsecs(typel_extent * blocksize / 2048, typel, ISO_BLOCKS(path_table_size));
#else
	lseek(fileno(infile), (off_t)((off_t)typel_extent) * blocksize, SEEK_SET);
	do{int ret;ret=read(fileno(infile), typel, path_table_size);}while(0); /* FIXME: check return value */
#endif
	typem = (char *) malloc(path_table_size);
	lseek(fileno(infile), (off_t)((off_t)typem_extent) * blocksize, SEEK_SET);
	do{int ret;ret=read(fileno(infile), typem, path_table_size);}while(0); /* FIXME: check return value */

	j = path_table_size;
	pnt = typel;
	count = 1;
	while (j) {
		int	namelen;
		int	extent;
		int	idx;
		char	name[32];

		namelen = *pnt++; pnt++;
		extent = isonum_731(pnt);
		pnt += 4;
		idx = isonum_721(pnt);
		pnt += 2;
		j -= 8 + namelen;
		memset(name, 0, sizeof (name));

		strncpy(name, pnt, namelen);
		pnt += namelen;
		if (j & 1) {
			j--;
			pnt++;
		}
		printf("%4.4d %4.4d %8.8x %s\n", count++, idx, extent, name);
	}

	j = path_table_size;
	pnt = typem;
	count = 1;

	while (j) {
		int	namelen;
		int	extent;
		int	idx;
		char	name[32];

		namelen = *pnt++; pnt++;
		extent = isonum_732(pnt);
		pnt += 4;
		idx = isonum_722(pnt);
		pnt += 2;
		j -= 8+namelen;
		memset(name, 0, sizeof (name));

		strncpy(name, pnt, namelen);
		pnt += namelen;
		if (j & 1) {
			j--;
			pnt++;
		}
		printf("%4.4d %4.4d %8.8x %s\n", count++, idx, extent, name);
	}
}

static void
usage(int excode)
{
	errmsgno(EX_BAD, "Usage: %s [options] image\n",
						get_progname());

	fprintf(stderr, "Options:\n");
	fprintf(stderr, "\t-help, -h	Print this help\n");
	fprintf(stderr, "\t-version	Print version info and exit\n");
	fprintf(stderr, "\t-i filename	Filename to read ISO-9660 image from\n");
	fprintf(stderr, "\tdev=target	SCSI target to use as CD/DVD-Recorder\n");
	fprintf(stderr, "\nIf neither -i nor dev= are speficied, <image> is needed.\n");
	exit(excode);
}

int
main(int argc, char *argv[])
{
	int	cac;
	char	* const *cav;
	char	*opts = "help,h,version,i*,dev*";
	BOOL	help = FALSE;
	BOOL	prvers = FALSE;
	char	*filename = NULL;
	char	*devname = NULL;
	off_t	file_addr;
	int	file_size;
	struct iso_primary_descriptor	ipd;
	struct iso_directory_record	*idr;
	int	typel_extent;
	int	typem_extent;
	int	path_table_size;

	save_args(argc, argv);

	cac = argc - 1;
	cav = argv + 1;
	if (getallargs(&cac, &cav, opts, &help, &help, &prvers,
			&filename, &devname) < 0) {
		errmsgno(EX_BAD, "Bad Option: '%s'\n", cav[0]);
		usage(EX_BAD);
	}
	if (help)
		usage(0);
	if (prvers) {
		printf("isovfy %s (%s)\n", CDRKIT_VERSION, HOST_SYSTEM);
		exit(0);
	}
	cac = argc - 1;
	cav = argv + 1;
	if (filename == NULL && devname == NULL) {
		if (getfiles(&cac, &cav, opts) != 0) {
			filename = cav[0];
			cac--, cav++;
		}
	}
	if (getfiles(&cac, &cav, opts) != 0) {
		errmsgno(EX_BAD, "Bad Argument: '%s'\n", cav[0]);
		usage(EX_BAD);
	}
	if (filename != NULL && devname != NULL) {
		errmsgno(EX_BAD, "Only one of -i or dev= allowed\n");
		usage(EX_BAD);
	}
#ifdef	USE_SCG
	if (filename == NULL && devname == NULL)
		cdr_defaults(&devname, NULL, NULL, NULL);
#endif
	if (filename == NULL && devname == NULL) {
#ifdef	USE_LIBSCHILY
		errmsgno(EX_BAD, "ISO-9660 image not specified\n");
#else
		fprintf(stderr, "ISO-9660 image not specified\n");
#endif
		usage(EX_BAD);
	}

	if (filename != NULL)
		infile = fopen(filename, "rb");
	else
		filename = devname;

	if (infile != NULL) {
		/* EMPTY */;
#ifdef	USE_SCG
	} else if (scsidev_open(filename) < 0) {
#else
	} else {
#endif
#ifdef	USE_LIBSCHILY
		comerr("Cannot open '%s'\n", filename);
#else
		fprintf(stderr, "Cannot open '%s'\n", filename);
		exit(1);
#endif
	}


	file_addr = (off_t)32768;
#ifdef	USE_SCG
	readsecs(file_addr / 2048, &ipd, ISO_BLOCKS(sizeof (ipd)));
#else
	lseek(fileno(infile), file_addr, SEEK_SET);
	read(fileno(infile), &ipd, sizeof (ipd));
#endif

	idr = (struct iso_directory_record *)ipd.root_directory_record;

	blocksize = isonum_723((char *)ipd.logical_block_size);
	if (blocksize != 512 && blocksize != 1024 && blocksize != 2048) {
		blocksize = 2048;
	}

	file_addr = (off_t)isonum_733(idr->extent) + isonum_711((char *)idr->ext_attr_length);
	file_size = isonum_733(idr->size);

	if (sizeof (file_addr) > sizeof (long)) {
		printf("Root at extent %llx, %d bytes\n", (Llong)file_addr, file_size);
	} else {
		printf("Root at extent %lx, %d bytes\n", (long)file_addr, file_size);
	}
	file_addr = file_addr * blocksize;

	check_tree(file_addr, file_size, file_addr);

	typel_extent = isonum_731((char *)ipd.type_l_path_table);
	typem_extent = isonum_732((char *)ipd.type_m_path_table);
	path_table_size = isonum_733(ipd.path_table_size);

	/* Enable this to get the dump of the path tables */
#if 0
	check_path_tables(typel_extent, typem_extent, path_table_size);
#endif

	if (infile != NULL)
		fclose(infile);

	if (!ngoof)
		printf("No errors found\n");
	return (0);
}
