{		yaffsfs_SetError(-ENOTDIR);	}	else if(!obj)	{		yaffsfs_SetError(-ENOENT);	}	else if(!isDirectory && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)	{		yaffsfs_SetError(-EISDIR);	}	else if(isDirectory && obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)	{		yaffsfs_SetError(-ENOTDIR);	}	else if(isDirectory && obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)	{		yaffsfs_SetError(-ENOTDIR);	}	else	{		result = yaffs_Unlink(dir,name);				if(result == YAFFS_FAIL && isDirectory)		{			yaffsfs_SetError(-ENOTEMPTY);		}	}		yaffsfs_Unlock();		// todo error		return (result == YAFFS_FAIL) ? -1 : 0;}int yaffs_rmdir(const char *path) {	return yaffsfs_DoUnlink(path,1);}int yaffs_unlink(const char *path) {	return yaffsfs_DoUnlink(path,0);}int yaffs_rename(const char *oldPath, const char *newPath){	yaffs_Object *olddir = NULL;	yaffs_Object *newdir = NULL;	yaffs_Object *obj = NULL;	char *oldname;	char *newname;	int result= YAFFS_FAIL;	int renameAllowed = 1;		yaffsfs_Lock();		olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0);	newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0);	obj = yaffsfs_FindObject(NULL,oldPath,0);		if(!olddir || !newdir || !obj)	{		// bad file		yaffsfs_SetError(-EBADF);			renameAllowed = 0;		}	else if(olddir->myDev != newdir->myDev)	{		// oops must be on same device		// todo error		yaffsfs_SetError(-EXDEV);		renameAllowed = 0;		}	else if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)	{		// It is a directory, check that it is not being renamed to 		// being its own decendent.		// Do this by tracing from the new directory back to the root, checking for obj				yaffs_Object *xx = newdir;				while( renameAllowed && xx)		{			if(xx == obj)			{				renameAllowed = 0;			}			xx = xx->parent;		}		if(!renameAllowed) yaffsfs_SetError(-EACCESS);	}		if(renameAllowed)	{		result = yaffs_RenameObject(olddir,oldname,newdir,newname);	}		yaffsfs_Unlock();		return (result == YAFFS_FAIL) ? -1 : 0;	}static int yaffsfs_DoStat(yaffs_Object *obj,struct yaffs_stat *buf){	int retVal = -1;	if(obj)	{		obj = yaffs_GetEquivalentObject(obj);	}	if(obj && buf)	{    	buf->yst_dev = (int)obj->myDev->genericDevice;    	buf->yst_ino = obj->objectId;    	buf->yst_mode = obj->yst_mode & ~S_IFMT; // clear out file type bits			if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) 		{			buf->yst_mode |= S_IFDIR;		}		else if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) 		{			buf->yst_mode |= S_IFLNK;		}		else if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)		{			buf->yst_mode |= S_IFREG;		}		    	buf->yst_nlink = yaffs_GetObjectLinkCount(obj);    	buf->yst_uid = 0;        	buf->yst_gid = 0;;         	buf->yst_rdev = obj->yst_rdev;    	buf->yst_size = yaffs_GetObjectFileLength(obj);		buf->yst_blksize = YAFFS_BYTES_PER_CHUNK;    	buf->yst_blocks = (buf->yst_size + YAFFS_BYTES_PER_CHUNK -1)/YAFFS_BYTES_PER_CHUNK;    	buf->yst_atime = obj->yst_atime;     	buf->yst_ctime = obj->yst_ctime;     	buf->yst_mtime = obj->yst_mtime; 		retVal = 0;	}	return retVal;}static int yaffsfs_DoStatOrLStat(const char *path, struct yaffs_stat *buf,int doLStat){	yaffs_Object *obj;		int retVal = -1;		yaffsfs_Lock();	obj = yaffsfs_FindObject(NULL,path,0);		if(!doLStat && obj)	{		obj = yaffsfs_FollowLink(obj,0);	}		if(obj)	{		retVal = yaffsfs_DoStat(obj,buf);	}	else	{		// todo error not found		yaffsfs_SetError(-ENOENT);	}		yaffsfs_Unlock();		return retVal;	}int yaffs_stat(const char *path, struct yaffs_stat *buf){	return yaffsfs_DoStatOrLStat(path,buf,0);}int yaffs_lstat(const char *path, struct yaffs_stat *buf){	return yaffsfs_DoStatOrLStat(path,buf,1);}int yaffs_fstat(int fd, struct yaffs_stat *buf){	yaffs_Object *obj;		int retVal = -1;		yaffsfs_Lock();	obj = yaffsfs_GetHandleObject(fd);		if(obj)	{		retVal = yaffsfs_DoStat(obj,buf);	}	else	{		// bad handle		yaffsfs_SetError(-EBADF);			}		yaffsfs_Unlock();		return retVal;}static int yaffsfs_DoChMod(yaffs_Object *obj,mode_t mode){	int result;	if(obj)	{		obj = yaffs_GetEquivalentObject(obj);	}		if(obj)	{		obj->yst_mode = mode;		obj->dirty = 1;		result = yaffs_FlushFile(obj,0);	}		return result == YAFFS_OK ? 0 : -1;}int yaffs_chmod(const char *path, mode_t mode){	yaffs_Object *obj;		int retVal = -1;		yaffsfs_Lock();	obj = yaffsfs_FindObject(NULL,path,0);		if(obj)	{		retVal = yaffsfs_DoChMod(obj,mode);	}	else	{		// todo error not found		yaffsfs_SetError(-ENOENT);	}		yaffsfs_Unlock();		return retVal;	}int yaffs_fchmod(int fd, mode_t mode){	yaffs_Object *obj;		int retVal = -1;		yaffsfs_Lock();	obj = yaffsfs_GetHandleObject(fd);		if(obj)	{		retVal = yaffsfs_DoChMod(obj,mode);	}	else	{		// bad handle		yaffsfs_SetError(-EBADF);			}		yaffsfs_Unlock();		return retVal;}int yaffs_mkdir(const char *path, mode_t mode){	yaffs_Object *parent = NULL;	yaffs_Object *dir;	char *name;	int retVal= -1;		yaffsfs_Lock();	parent = yaffsfs_FindDirectory(NULL,path,&name,0);	dir = yaffs_MknodDirectory(parent,name,mode,0,0);	if(dir)	{		retVal = 0;	}	else	{		yaffsfs_SetError(-ENOSPC); // just assume no space for now		retVal = -1;	}		yaffsfs_Unlock();		return retVal;}int yaffs_mount(const char *path){	int retVal=-1;	int result=YAFFS_FAIL;	yaffs_Device *dev=NULL;	char *dummy;		yaffsfs_Lock();	dev = yaffsfs_FindDevice(path,&dummy);	if(dev)	{		if(!dev->isMounted)		{			result = yaffs_GutsInitialise(dev);			if(result == YAFFS_FAIL)			{				// todo error - mount failed				yaffsfs_SetError(-ENOMEM);			}			retVal = result ? 0 : -1;					}		else		{			//todo error - already mounted.			yaffsfs_SetError(-EBUSY);		}	}	else	{		// todo error - no device		yaffsfs_SetError(-ENODEV);	}	yaffsfs_Unlock();	return retVal;	}int yaffs_unmount(const char *path){	int retVal=-1;	yaffs_Device *dev=NULL;	char *dummy;		yaffsfs_Lock();	dev = yaffsfs_FindDevice(path,&dummy);	if(dev)	{		if(dev->isMounted)		{			int i;			int inUse;			for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++)			{				if(yaffsfs_handle[i].inUse && yaffsfs_handle[i].obj->myDev == dev)				{					inUse = 1; // the device is in use, can't unmount				}			}						if(!inUse)			{				yaffs_Deinitialise(dev);									retVal = 0;			}			else			{				// todo error can't unmount as files are open				yaffsfs_SetError(-EBUSY);			}					}		else		{			//todo error - not mounted.			yaffsfs_SetError(-EINVAL);					}	}	else	{		// todo error - no device		yaffsfs_SetError(-ENODEV);	}		yaffsfs_Unlock();	return retVal;	}off_t yaffs_freespace(const char *path){	off_t retVal=-1;	yaffs_Device *dev=NULL;	char *dummy;		yaffsfs_Lock();	dev = yaffsfs_FindDevice(path,&dummy);	if(dev)	{		retVal = yaffs_GetNumberOfFreeChunks(dev);		retVal *= YAFFS_BYTES_PER_CHUNK;			}	else	{		yaffsfs_SetError(-EINVAL);	}		yaffsfs_Unlock();	return retVal;	}void yaffs_initialise(yaffsfs_DeviceConfiguration *cfgList){		yaffsfs_DeviceConfiguration *cfg;		yaffsfs_configurationList = cfgList;		yaffsfs_InitHandles();		cfg = yaffsfs_configurationList;		while(cfg && cfg->prefix && cfg->dev)	{		cfg->dev->isMounted = 0;		cfg++;	}		}//// Directory search stuff.yaffs_DIR *yaffs_opendir(const char *dirname){	yaffs_DIR *dir = NULL; 	yaffs_Object *obj = NULL;	yaffsfs_DirectorySearchContext *dsc = NULL;		yaffsfs_Lock();		obj = yaffsfs_FindObject(NULL,dirname,0);		if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)	{				dsc = YMALLOC(sizeof(yaffsfs_DirectorySearchContext));		dir = (yaffs_DIR *)dsc;		if(dsc)		{			dsc->magic = YAFFS_MAGIC;			dsc->list = NULL;			memset(dsc->name,0,NAME_MAX+1);			strncpy(dsc->name,dirname,NAME_MAX);		}		}		yaffsfs_Unlock();		return dir;}struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp){	yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;	struct yaffs_dirent *retVal = NULL;	struct list_head *i;		yaffs_Object *entry = NULL;	int offset;	yaffs_Object *obj = NULL;	struct yaffsfs_ObjectListEntry *list = NULL;	int inList = 0;			yaffsfs_Lock();		offset = -1;		if(dsc && dsc->magic == YAFFS_MAGIC)	{		yaffsfs_SetError(0);				obj = yaffsfs_FindObject(NULL,dsc->name,0);			if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)		{						list_for_each(i,&obj->variant.directoryVariant.children)			{							offset++;					entry = (i) ?  list_entry(i, yaffs_Object,siblings) : NULL;								if(entry)					{						list = dsc->list;						inList = 0;						while(list && !inList)						{							if(list->objectId == entry->objectId)							{								inList = 1;							}							list = list->next;						}												if(!inList) goto foundNew;					}							}						foundNew:						if(!inList && entry)			{				//This is the entry we're going to return;				struct yaffsfs_ObjectListEntry *le;								le = YMALLOC(sizeof(struct yaffsfs_ObjectListEntry));								if(le)				{					le->next =  dsc->list;					le->objectId = entry->objectId;					dsc->list = le;										dsc->de.d_ino = yaffs_GetEquivalentObject(entry)->objectId;					dsc->de.d_off = offset;					yaffs_GetObjectName(entry,dsc->de.d_name,NAME_MAX+1);					dsc->de.d_reclen = sizeof(struct yaffs_dirent);										retVal = &dsc->de;				}							}		}	}	else	{		yaffsfs_SetError(-EBADF);	}		yaffsfs_Unlock();		return retVal;	}void yaffsfs_ListClear(yaffsfs_DirectorySearchContext *dsc) {		struct yaffsfs_ObjectListEntry *le;		if(dsc && dsc->magic == YAFFS_MAGIC)	{		while(dsc->list)		{			le = dsc->list;			dsc->list = dsc->list->next;			YFREE(le);		}	}	}void yaffs_rewinddir(yaffs_DIR *dirp){	yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;			yaffsfs_Lock();	yaffsfs_ListClear(dsc);	yaffsfs_Unlock();}int yaffs_closedir(yaffs_DIR *dirp){	yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;			yaffsfs_Lock();	yaffsfs_ListClear(dsc);	dsc->magic = 0;	YFREE(dsc);	yaffsfs_Unlock();	return 0;}int yaffs_symlink(const char *oldpath, const char *newpath){	yaffs_Object *parent = NULL;	yaffs_Object *obj;	char *name;	int retVal= -1;	int mode = 0; // ignore for now		yaffsfs_Lock();	parent = yaffsfs_FindDirectory(NULL,newpath,&name,0);	obj = yaffs_MknodSymLink(parent,name,mode,0,0,oldpath);	if(obj)	{		retVal = 0;	}	else	{		yaffsfs_SetError(-ENOSPC); // just assume no space for now		retVal = -1;	}		yaffsfs_Unlock();		return retVal;	}int yaffs_readlink(const char *path, char *buf, int bufsiz){	yaffs_Object *obj = NULL;	int retVal;			yaffsfs_Lock();		obj = yaffsfs_FindObject(NULL,path,0);		if(!obj)	{		yaffsfs_SetError(-ENOENT);		retVal = -1;	}	else if(obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK)	{		yaffsfs_SetError(-EINVAL);		retVal = -1;	}	else	{		char *alias = obj->variant.symLinkVariant.alias;		memset(buf,0,bufsiz);		strncpy(buf,alias,bufsiz - 1);		retVal = 0;	}	yaffsfs_Unlock();	return retVal;}int yaffs_link(const char *oldpath, const char *newpath); int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev);int yaffs_DumpDevStruct(const char *path){	char *rest;		yaffs_Object *obj = yaffsfs_FindRoot(path,&rest);		if(obj)	{		yaffs_Device *dev = obj->myDev;				printf("\n"			   "nPageWrites.......... %d\n"			   "nPageReads........... %d\n"			   "nBlockErasures....... %d\n"			   "nGCCopies............ %d\n"			   "garbageCollections... %d\n"			   "passiveGarbageColl'ns %d\n"			   "\n",				dev->nPageWrites,				dev->nPageReads,				dev->nBlockErasures,				dev->nGCCopies,				dev->garbageCollections,				dev->passiveGarbageCollections		);	}	return 0;}