/* * One file structure is allocated * for each open/creat/pipe call. * Main use is to hold the read/write * pointer associated with each open * file. */struct	file{	char	f_flag;	char	f_count;	/* reference count */	int	f_inode;	/* pointer to inode structure */	char	*f_offset[2];	/* read/write character pointer */} file[NFILE];/* flags */#define	FREAD	01#define	FWRITE	02#define	FPIPE	04