squashfs-tools/squashfs-tools/unsquash-1.c - nest-cam/4320010/squashfs-tools - Git at Google

 /*
  * Unsquash a squashfs filesystem.  This is a highly compressed read only
  * filesystem.
  *
  * Copyright (c) 2009, 2010, 2011, 2012
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2,
  * or (at your option) any later version.
  *
  * 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; if not, write to the Free Software
  * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  *
  * unsquash-1.c
  */

 #include "unsquashfs.h"
 #include "squashfs_compat.h"

 void read_block_list_1(unsigned int *block_list, char *block_ptr, int blocks)
 {
 	unsigned short block_size;
 	int i;

 	TRACE("read_block_list: blocks %d\n", blocks);

 	for(i = 0; i < blocks; i++, block_ptr += 2) {
 		if(swap) {
 			unsigned short sblock_size;
 			memcpy(&sblock_size, block_ptr, sizeof(unsigned short));
 			SQUASHFS_SWAP_SHORTS_3((&block_size), &sblock_size, 1);
 		} else
 			memcpy(&block_size, block_ptr, sizeof(unsigned short));
 		block_list[i] = SQUASHFS_COMPRESSED_SIZE(block_size) |
 			(SQUASHFS_COMPRESSED(block_size) ? 0 :
 			SQUASHFS_COMPRESSED_BIT_BLOCK);
 	}
 }


 int read_fragment_table_1(long long *directory_table_end)
 {
 	TRACE("read_fragment_table\n");
 	*directory_table_end = sBlk.s.fragment_table_start;
 	return TRUE;
 }


 struct inode *read_inode_1(unsigned int start_block, unsigned int offset)
 {
 	static union squashfs_inode_header_1 header;
 	long long start = sBlk.s.inode_table_start + start_block;
 	int bytes = lookup_entry(inode_table_hash, start);
 	char *block_ptr = inode_table + bytes + offset;
 	static struct inode i;

 	TRACE("read_inode: reading inode [%d:%d]\n", start_block,  offset);

 	if(bytes == -1)
 		EXIT_UNSQUASH("read_inode: inode table block %lld not found\n",
 			 start);

 	if(swap) {
 		squashfs_base_inode_header_1 sinode;
 		memcpy(&sinode, block_ptr, sizeof(header.base));
 		SQUASHFS_SWAP_BASE_INODE_HEADER_1(&header.base, &sinode,
 			sizeof(squashfs_base_inode_header_1));
 	} else
 		memcpy(&header.base, block_ptr, sizeof(header.base));

 	i.uid = (uid_t) uid_table[(header.base.inode_type - 1) /
 		SQUASHFS_TYPES * 16 + header.base.uid];
 	if(header.base.inode_type == SQUASHFS_IPC_TYPE) {
 		squashfs_ipc_inode_header_1 *inodep = &header.ipc;

 		if(swap) {
 			squashfs_ipc_inode_header_1 sinodep;
 			memcpy(&sinodep, block_ptr, sizeof(sinodep));
 			SQUASHFS_SWAP_IPC_INODE_HEADER_1(inodep, &sinodep);
 		} else
 			memcpy(inodep, block_ptr, sizeof(*inodep));

 		if(inodep->type == SQUASHFS_SOCKET_TYPE) {
 			i.mode = S_IFSOCK | header.base.mode;
 			i.type = SQUASHFS_SOCKET_TYPE;
 		} else {
 			i.mode = S_IFIFO | header.base.mode;
 			i.type = SQUASHFS_FIFO_TYPE;
 		}
 		i.uid = (uid_t) uid_table[inodep->offset * 16 + inodep->uid];
 	} else {
 		i.mode = lookup_type[(header.base.inode_type - 1) %
 			SQUASHFS_TYPES + 1] | header.base.mode;
 		i.type = (header.base.inode_type - 1) % SQUASHFS_TYPES + 1;
 	}

 	i.xattr = SQUASHFS_INVALID_XATTR;
 	i.gid = header.base.guid == 15 ? i.uid :
 		(uid_t) guid_table[header.base.guid];
 	i.time = sBlk.s.mkfs_time;
 	i.inode_number = inode_number ++;

 	switch(i.type) {
 		case SQUASHFS_DIR_TYPE: {
 			squashfs_dir_inode_header_1 *inode = &header.dir;

 			if(swap) {
 				squashfs_dir_inode_header_1 sinode;
 				memcpy(&sinode, block_ptr, sizeof(header.dir));
 				SQUASHFS_SWAP_DIR_INODE_HEADER_1(inode,
 					&sinode);
 			} else
 			memcpy(inode, block_ptr, sizeof(header.dir));

 			i.data = inode->file_size;
 			i.offset = inode->offset;
 			i.start = inode->start_block;
 			i.time = inode->mtime;
 			break;
 		}
 		case SQUASHFS_FILE_TYPE: {
 			squashfs_reg_inode_header_1 *inode = &header.reg;

 			if(swap) {
 				squashfs_reg_inode_header_1 sinode;
 				memcpy(&sinode, block_ptr, sizeof(sinode));
 				SQUASHFS_SWAP_REG_INODE_HEADER_1(inode,
 					&sinode);
 			} else
 				memcpy(inode, block_ptr, sizeof(*inode));

 			i.data = inode->file_size;
 			i.time = inode->mtime;
 			i.blocks = (i.data + sBlk.s.block_size - 1) >>
 				sBlk.s.block_log;
 			i.start = inode->start_block;
 			i.block_ptr = block_ptr + sizeof(*inode);
 			i.fragment = 0;
 			i.frag_bytes = 0;
 			i.offset = 0;
 			i.sparse = 0;
 			break;
 		}
 		case SQUASHFS_SYMLINK_TYPE: {
 			squashfs_symlink_inode_header_1 *inodep =
 				&header.symlink;

 			if(swap) {
 				squashfs_symlink_inode_header_1 sinodep;
 				memcpy(&sinodep, block_ptr, sizeof(sinodep));
 				SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(inodep,
 					&sinodep);
 			} else
 				memcpy(inodep, block_ptr, sizeof(*inodep));

 			i.symlink = malloc(inodep->symlink_size + 1);
 			if(i.symlink == NULL)
 				EXIT_UNSQUASH("read_inode: failed to malloc "
 					"symlink data\n");
 			strncpy(i.symlink, block_ptr +
 				sizeof(squashfs_symlink_inode_header_1),
 				inodep->symlink_size);
 			i.symlink[inodep->symlink_size] = '\0';
 			i.data = inodep->symlink_size;
 			break;
 		}
  		case SQUASHFS_BLKDEV_TYPE:
 	 	case SQUASHFS_CHRDEV_TYPE: {
 			squashfs_dev_inode_header_1 *inodep = &header.dev;

 			if(swap) {
 				squashfs_dev_inode_header_1 sinodep;
 				memcpy(&sinodep, block_ptr, sizeof(sinodep));
 				SQUASHFS_SWAP_DEV_INODE_HEADER_1(inodep,
 					&sinodep);
 			} else
 				memcpy(inodep, block_ptr, sizeof(*inodep));

 			i.data = inodep->rdev;
 			break;
 			}
 		case SQUASHFS_FIFO_TYPE:
 		case SQUASHFS_SOCKET_TYPE: {
 			i.data = 0;
 			break;
 			}
 		default:
 			EXIT_UNSQUASH("Unknown inode type %d in "
 				" read_inode_header_1!\n",
 				header.base.inode_type);
 	}
 	return &i;
 }


 struct dir *squashfs_opendir_1(unsigned int block_start, unsigned int offset,
 	struct inode **i)
 {
 	squashfs_dir_header_2 dirh;
 	char buffer[sizeof(squashfs_dir_entry_2) + SQUASHFS_NAME_LEN + 1]
 		__attribute__((aligned));
 	squashfs_dir_entry_2 *dire = (squashfs_dir_entry_2 *) buffer;
 	long long start;
 	int bytes;
 	int dir_count, size;
 	struct dir_ent *new_dir;
 	struct dir *dir;

 	TRACE("squashfs_opendir: inode start block %d, offset %d\n",
 		block_start, offset);

 	*i = s_ops.read_inode(block_start, offset);

 	dir = malloc(sizeof(struct dir));
 	if(dir == NULL)
 		EXIT_UNSQUASH("squashfs_opendir: malloc failed!\n");

 	dir->dir_count = 0;
 	dir->cur_entry = 0;
 	dir->mode = (*i)->mode;
 	dir->uid = (*i)->uid;
 	dir->guid = (*i)->gid;
 	dir->mtime = (*i)->time;
 	dir->xattr = (*i)->xattr;
 	dir->dirs = NULL;

 	if ((*i)->data == 0)
 		/*
 		 * if the directory is empty, skip the unnecessary
 		 * lookup_entry, this fixes the corner case with
 		 * completely empty filesystems where lookup_entry correctly
 		 * returning -1 is incorrectly treated as an error
 		 */
 		return dir;

 	start = sBlk.s.directory_table_start + (*i)->start;
 	bytes = lookup_entry(directory_table_hash, start);
 	if(bytes == -1)
 		EXIT_UNSQUASH("squashfs_opendir: directory block %d not "
 			"found!\n", block_start);

 	bytes += (*i)->offset;
 	size = (*i)->data + bytes;

 	while(bytes < size) {
 		if(swap) {
 			squashfs_dir_header_2 sdirh;
 			memcpy(&sdirh, directory_table + bytes, sizeof(sdirh));
 			SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh);
 		} else
 			memcpy(&dirh, directory_table + bytes, sizeof(dirh));

 		dir_count = dirh.count + 1;
 		TRACE("squashfs_opendir: Read directory header @ byte position "
 			"%d, %d directory entries\n", bytes, dir_count);
 		bytes += sizeof(dirh);

 		/* dir_count should never be larger than 256 */
 		if(dir_count > 256)
 			goto corrupted;

 		while(dir_count--) {
 			if(swap) {
 				squashfs_dir_entry_2 sdire;
 				memcpy(&sdire, directory_table + bytes,
 					sizeof(sdire));
 				SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire);
 			} else
 				memcpy(dire, directory_table + bytes,
 					sizeof(*dire));
 			bytes += sizeof(*dire);

 			/* size should never be larger than SQUASHFS_NAME_LEN */
 			if(dire->size > SQUASHFS_NAME_LEN)
 				goto corrupted;

 			memcpy(dire->name, directory_table + bytes,
 				dire->size + 1);
 			dire->name[dire->size + 1] = '\0';
 			TRACE("squashfs_opendir: directory entry %s, inode "
 				"%d:%d, type %d\n", dire->name,
 				dirh.start_block, dire->offset, dire->type);
 			if((dir->dir_count % DIR_ENT_SIZE) == 0) {
 				new_dir = realloc(dir->dirs, (dir->dir_count +
 					DIR_ENT_SIZE) * sizeof(struct dir_ent));
 				if(new_dir == NULL)
 					EXIT_UNSQUASH("squashfs_opendir: "
 						"realloc failed!\n");
 				dir->dirs = new_dir;
 			}
 			strcpy(dir->dirs[dir->dir_count].name, dire->name);
 			dir->dirs[dir->dir_count].start_block =
 				dirh.start_block;
 			dir->dirs[dir->dir_count].offset = dire->offset;
 			dir->dirs[dir->dir_count].type = dire->type;
 			dir->dir_count ++;
 			bytes += dire->size + 1;
 		}
 	}

 	return dir;

 corrupted:
 	free(dir->dirs);
 	free(dir);
 	return NULL;
 }


 int read_uids_guids_1()
 {
 	int res;

 	TRACE("read_uids_guids: no_uids %d, no_guids %d\n", sBlk.no_uids,
 		sBlk.no_guids);

 	uid_table = malloc((sBlk.no_uids + sBlk.no_guids) *
 		sizeof(unsigned int));
 	if(uid_table == NULL) {
 		ERROR("read_uids_guids: failed to allocate uid/gid table\n");
 		return FALSE;
 	}

 	guid_table = uid_table + sBlk.no_uids;

 	if(swap) {
 		unsigned int suid_table[sBlk.no_uids + sBlk.no_guids];

 		res = read_fs_bytes(fd, sBlk.uid_start, (sBlk.no_uids +
 			sBlk.no_guids) * sizeof(unsigned int), suid_table);
 		if(res == FALSE) {
 			ERROR("read_uids_guids: failed to read uid/gid table"
 				"\n");
 			return FALSE;
 		}
 		SQUASHFS_SWAP_INTS_3(uid_table, suid_table,
 			sBlk.no_uids + sBlk.no_guids);
 	} else {
 		res = read_fs_bytes(fd, sBlk.uid_start, (sBlk.no_uids +
 			sBlk.no_guids) * sizeof(unsigned int), uid_table);
 		if(res == FALSE) {
 			ERROR("read_uids_guids: failed to read uid/gid table"
 				"\n");
 			return FALSE;
 		}
 	}

 	return TRUE;
 }
	/*
	* Unsquash a squashfs filesystem. This is a highly compressed read only
	* filesystem.
	*
	* Copyright (c) 2009, 2010, 2011, 2012
	* Phillip Lougher <phillip@squashfs.org.uk>
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version 2,
	* or (at your option) any later version.
	*
	* 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; if not, write to the Free Software
	* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	*
	* unsquash-1.c
	*/

	#include "unsquashfs.h"
	#include "squashfs_compat.h"

	void read_block_list_1(unsigned int block_list, char block_ptr, int blocks)
	{
	unsigned short block_size;
	int i;

	TRACE("read_block_list: blocks %d\n", blocks);

	for(i = 0; i < blocks; i++, block_ptr += 2) {
	if(swap) {
	unsigned short sblock_size;
	memcpy(&sblock_size, block_ptr, sizeof(unsigned short));
	SQUASHFS_SWAP_SHORTS_3((&block_size), &sblock_size, 1);
	} else
	memcpy(&block_size, block_ptr, sizeof(unsigned short));
	block_list[i] = SQUASHFS_COMPRESSED_SIZE(block_size) \|
	(SQUASHFS_COMPRESSED(block_size) ? 0 :
	SQUASHFS_COMPRESSED_BIT_BLOCK);
	}
	}


	int read_fragment_table_1(long long *directory_table_end)
	{
	TRACE("read_fragment_table\n");
	*directory_table_end = sBlk.s.fragment_table_start;
	return TRUE;
	}


	struct inode *read_inode_1(unsigned int start_block, unsigned int offset)
	{
	static union squashfs_inode_header_1 header;
	long long start = sBlk.s.inode_table_start + start_block;
	int bytes = lookup_entry(inode_table_hash, start);
	char *block_ptr = inode_table + bytes + offset;
	static struct inode i;

	TRACE("read_inode: reading inode [%d:%d]\n", start_block, offset);

	if(bytes == -1)
	EXIT_UNSQUASH("read_inode: inode table block %lld not found\n",
	start);

	if(swap) {
	squashfs_base_inode_header_1 sinode;
	memcpy(&sinode, block_ptr, sizeof(header.base));
	SQUASHFS_SWAP_BASE_INODE_HEADER_1(&header.base, &sinode,
	sizeof(squashfs_base_inode_header_1));
	} else
	memcpy(&header.base, block_ptr, sizeof(header.base));

	i.uid = (uid_t) uid_table[(header.base.inode_type - 1) /
	SQUASHFS_TYPES * 16 + header.base.uid];
	if(header.base.inode_type == SQUASHFS_IPC_TYPE) {
	squashfs_ipc_inode_header_1 *inodep = &header.ipc;

	if(swap) {
	squashfs_ipc_inode_header_1 sinodep;
	memcpy(&sinodep, block_ptr, sizeof(sinodep));
	SQUASHFS_SWAP_IPC_INODE_HEADER_1(inodep, &sinodep);
	} else
	memcpy(inodep, block_ptr, sizeof(*inodep));

	if(inodep->type == SQUASHFS_SOCKET_TYPE) {
	i.mode = S_IFSOCK \| header.base.mode;
	i.type = SQUASHFS_SOCKET_TYPE;
	} else {
	i.mode = S_IFIFO \| header.base.mode;
	i.type = SQUASHFS_FIFO_TYPE;
	}
	i.uid = (uid_t) uid_table[inodep->offset * 16 + inodep->uid];
	} else {
	i.mode = lookup_type[(header.base.inode_type - 1) %
	SQUASHFS_TYPES + 1] \| header.base.mode;
	i.type = (header.base.inode_type - 1) % SQUASHFS_TYPES + 1;
	}

	i.xattr = SQUASHFS_INVALID_XATTR;
	i.gid = header.base.guid == 15 ? i.uid :
	(uid_t) guid_table[header.base.guid];
	i.time = sBlk.s.mkfs_time;
	i.inode_number = inode_number ++;

	switch(i.type) {
	case SQUASHFS_DIR_TYPE: {
	squashfs_dir_inode_header_1 *inode = &header.dir;

	if(swap) {
	squashfs_dir_inode_header_1 sinode;
	memcpy(&sinode, block_ptr, sizeof(header.dir));
	SQUASHFS_SWAP_DIR_INODE_HEADER_1(inode,
	&sinode);
	} else
	memcpy(inode, block_ptr, sizeof(header.dir));

	i.data = inode->file_size;
	i.offset = inode->offset;
	i.start = inode->start_block;
	i.time = inode->mtime;
	break;
	}
	case SQUASHFS_FILE_TYPE: {
	squashfs_reg_inode_header_1 *inode = &header.reg;

	if(swap) {
	squashfs_reg_inode_header_1 sinode;
	memcpy(&sinode, block_ptr, sizeof(sinode));
	SQUASHFS_SWAP_REG_INODE_HEADER_1(inode,
	&sinode);
	} else
	memcpy(inode, block_ptr, sizeof(*inode));

	i.data = inode->file_size;
	i.time = inode->mtime;
	i.blocks = (i.data + sBlk.s.block_size - 1) >>
	sBlk.s.block_log;
	i.start = inode->start_block;
	i.block_ptr = block_ptr + sizeof(*inode);
	i.fragment = 0;
	i.frag_bytes = 0;
	i.offset = 0;
	i.sparse = 0;
	break;
	}
	case SQUASHFS_SYMLINK_TYPE: {
	squashfs_symlink_inode_header_1 *inodep =
	&header.symlink;

	if(swap) {
	squashfs_symlink_inode_header_1 sinodep;
	memcpy(&sinodep, block_ptr, sizeof(sinodep));
	SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(inodep,
	&sinodep);
	} else
	memcpy(inodep, block_ptr, sizeof(*inodep));

	i.symlink = malloc(inodep->symlink_size + 1);
	if(i.symlink == NULL)
	EXIT_UNSQUASH("read_inode: failed to malloc "
	"symlink data\n");
	strncpy(i.symlink, block_ptr +
	sizeof(squashfs_symlink_inode_header_1),
	inodep->symlink_size);
	i.symlink[inodep->symlink_size] = '\0';
	i.data = inodep->symlink_size;
	break;
	}
	case SQUASHFS_BLKDEV_TYPE:
	case SQUASHFS_CHRDEV_TYPE: {
	squashfs_dev_inode_header_1 *inodep = &header.dev;

	if(swap) {
	squashfs_dev_inode_header_1 sinodep;
	memcpy(&sinodep, block_ptr, sizeof(sinodep));
	SQUASHFS_SWAP_DEV_INODE_HEADER_1(inodep,
	&sinodep);
	} else
	memcpy(inodep, block_ptr, sizeof(*inodep));

	i.data = inodep->rdev;
	break;
	}
	case SQUASHFS_FIFO_TYPE:
	case SQUASHFS_SOCKET_TYPE: {
	i.data = 0;
	break;
	}
	default:
	EXIT_UNSQUASH("Unknown inode type %d in "
	" read_inode_header_1!\n",
	header.base.inode_type);
	}
	return &i;
	}


	struct dir *squashfs_opendir_1(unsigned int block_start, unsigned int offset,
	struct inode **i)
	{
	squashfs_dir_header_2 dirh;
	char buffer[sizeof(squashfs_dir_entry_2) + SQUASHFS_NAME_LEN + 1]
	__attribute__((aligned));
	squashfs_dir_entry_2 dire = (squashfs_dir_entry_2 ) buffer;
	long long start;
	int bytes;
	int dir_count, size;
	struct dir_ent *new_dir;
	struct dir *dir;

	TRACE("squashfs_opendir: inode start block %d, offset %d\n",
	block_start, offset);

	*i = s_ops.read_inode(block_start, offset);

	dir = malloc(sizeof(struct dir));
	if(dir == NULL)
	EXIT_UNSQUASH("squashfs_opendir: malloc failed!\n");

	dir->dir_count = 0;
	dir->cur_entry = 0;
	dir->mode = (*i)->mode;
	dir->uid = (*i)->uid;
	dir->guid = (*i)->gid;
	dir->mtime = (*i)->time;
	dir->xattr = (*i)->xattr;
	dir->dirs = NULL;

	if ((*i)->data == 0)
	/*
	* if the directory is empty, skip the unnecessary
	* lookup_entry, this fixes the corner case with
	* completely empty filesystems where lookup_entry correctly
	* returning -1 is incorrectly treated as an error
	*/
	return dir;

	start = sBlk.s.directory_table_start + (*i)->start;
	bytes = lookup_entry(directory_table_hash, start);
	if(bytes == -1)
	EXIT_UNSQUASH("squashfs_opendir: directory block %d not "
	"found!\n", block_start);

	bytes += (*i)->offset;
	size = (*i)->data + bytes;

	while(bytes < size) {
	if(swap) {
	squashfs_dir_header_2 sdirh;
	memcpy(&sdirh, directory_table + bytes, sizeof(sdirh));
	SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh);
	} else
	memcpy(&dirh, directory_table + bytes, sizeof(dirh));

	dir_count = dirh.count + 1;
	TRACE("squashfs_opendir: Read directory header @ byte position "
	"%d, %d directory entries\n", bytes, dir_count);
	bytes += sizeof(dirh);

	/* dir_count should never be larger than 256 */
	if(dir_count > 256)
	goto corrupted;

	while(dir_count--) {
	if(swap) {
	squashfs_dir_entry_2 sdire;
	memcpy(&sdire, directory_table + bytes,
	sizeof(sdire));
	SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire);
	} else
	memcpy(dire, directory_table + bytes,
	sizeof(*dire));
	bytes += sizeof(*dire);

	/* size should never be larger than SQUASHFS_NAME_LEN */
	if(dire->size > SQUASHFS_NAME_LEN)
	goto corrupted;

	memcpy(dire->name, directory_table + bytes,
	dire->size + 1);
	dire->name[dire->size + 1] = '\0';
	TRACE("squashfs_opendir: directory entry %s, inode "
	"%d:%d, type %d\n", dire->name,
	dirh.start_block, dire->offset, dire->type);
	if((dir->dir_count % DIR_ENT_SIZE) == 0) {
	new_dir = realloc(dir->dirs, (dir->dir_count +
	DIR_ENT_SIZE) * sizeof(struct dir_ent));
	if(new_dir == NULL)
	EXIT_UNSQUASH("squashfs_opendir: "
	"realloc failed!\n");
	dir->dirs = new_dir;
	}
	strcpy(dir->dirs[dir->dir_count].name, dire->name);
	dir->dirs[dir->dir_count].start_block =
	dirh.start_block;
	dir->dirs[dir->dir_count].offset = dire->offset;
	dir->dirs[dir->dir_count].type = dire->type;
	dir->dir_count ++;
	bytes += dire->size + 1;
	}
	}

	return dir;

	corrupted:
	free(dir->dirs);
	free(dir);
	return NULL;
	}


	int read_uids_guids_1()
	{
	int res;

	TRACE("read_uids_guids: no_uids %d, no_guids %d\n", sBlk.no_uids,
	sBlk.no_guids);

	uid_table = malloc((sBlk.no_uids + sBlk.no_guids) *
	sizeof(unsigned int));
	if(uid_table == NULL) {
	ERROR("read_uids_guids: failed to allocate uid/gid table\n");
	return FALSE;
	}

	guid_table = uid_table + sBlk.no_uids;

	if(swap) {
	unsigned int suid_table[sBlk.no_uids + sBlk.no_guids];

	res = read_fs_bytes(fd, sBlk.uid_start, (sBlk.no_uids +
	sBlk.no_guids) * sizeof(unsigned int), suid_table);
	if(res == FALSE) {
	ERROR("read_uids_guids: failed to read uid/gid table"
	"\n");
	return FALSE;
	}
	SQUASHFS_SWAP_INTS_3(uid_table, suid_table,
	sBlk.no_uids + sBlk.no_guids);
	} else {
	res = read_fs_bytes(fd, sBlk.uid_start, (sBlk.no_uids +
	sBlk.no_guids) * sizeof(unsigned int), uid_table);
	if(res == FALSE) {
	ERROR("read_uids_guids: failed to read uid/gid table"
	"\n");
	return FALSE;
	}
	}

	return TRUE;
	}