#include "apue.h"#include <errno.h>#define	CS_OPEN "/home/sar/opend"	/* well-known name */#define	CL_OPEN "open"				/* client's request for server */extern int	 debug;		/* nonzero if interactive (not daemon) */extern char	 errmsg[];	/* error message string to return to client */extern int	 oflag;		/* open flag: O_xxx ... */extern char	*pathname;	/* of file to open for client */typedef struct {	/* one Client struct per connected client */  int	fd;			/* fd, or -1 if available */  uid_t	uid;} Client;extern Client	*client;		/* ptr to malloc'ed array */extern int		 client_size;	/* # entries in client[] array */int		 cli_args(int, char **);int		 client_add(int, uid_t);void	 client_del(int);void	 loop(void);void	 request(char *, int, int, uid_t);