#define nil NULL #define	nelem(x)	(sizeof(x)/sizeof((x)[0])) #define	ERRMAX	256#define	OREAD	0	/* open for read */#define	OWRITE	1	/* write */#define	ORDWR	2	/* read and write */#define	OEXEC	3	/* execute, == read but check execute permission */#define	OTRUNC	16	/* or'ed in (except for exec), truncate file first */#define	OCEXEC	32	/* or'ed in, close on exec */#define	ORCLOSE	64	/* or'ed in, remove on close */#define	ODIRECT	128	/* or'ed in, direct access */#define	ONONBLOCK 256	/* or'ed in, non-blocking call */#define	OEXCL	0x1000	/* or'ed in, exclusive use (create only) */#define	OLOCK	0x2000	/* or'ed in, lock after opening */#define	OAPPEND	0x4000	/* or'ed in, append only */ /* bits in Qid.type */#define QTDIR		0x80		/* type bit for directories */#define QTAPPEND	0x40		/* type bit for append only files */#define QTEXCL		0x20		/* type bit for exclusive use files */#define QTMOUNT		0x10		/* type bit for mounted channel */#define QTAUTH		0x08		/* type bit for authentication file */#define QTTMP		0x04		/* type bit for non-backed-up file */#define QTSYMLINK	0x02		/* type bit for symbolic link */#define QTFILE		0x00		/* type bits for plain file */ /* bits in Dir.mode */#define DMDIR		0x80000000	/* mode bit for directories */#define DMAPPEND	0x40000000	/* mode bit for append only files */#define DMEXCL		0x20000000	/* mode bit for exclusive use files */#define DMMOUNT		0x10000000	/* mode bit for mounted channel */#define DMAUTH		0x08000000	/* mode bit for authentication file */#define DMTMP		0x04000000	/* mode bit for non-backed-up file */#define DMSYMLINK	0x02000000	/* mode bit for symbolic link (Unix, 9P2000.u) */#define DMDEVICE	0x00800000	/* mode bit for device file (Unix, 9P2000.u) */#define DMNAMEDPIPE	0x00200000	/* mode bit for named pipe (Unix, 9P2000.u) */#define DMSOCKET	0x00100000	/* mode bit for socket (Unix, 9P2000.u) */#define DMSETUID	0x00080000	/* mode bit for setuid (Unix, 9P2000.u) */#define DMSETGID	0x00040000	/* mode bit for setgid (Unix, 9P2000.u) */ #define DMREAD		0x4		/* mode bit for read permission */#define DMWRITE		0x2		/* mode bit for write permission */#define DMEXEC		0x1		/* mode bit for execute permission */ #define	STATMAX	65535U	/* max length of machine-independent stat structure */#define	DIRMAX	(sizeof(Dir)+STATMAX)	/* max length of Dir structure */ typedef uint64_t u64int;typedef int64_t s64int;typedef uint8_t u8int;typedef int8_t s8int;typedef uint16_t u16int;typedef int16_t s16int;typedef uintptr_t uintptr;typedef intptr_t intptr;typedef uint32_t u32int;typedef int32_t s32int;typedef unsigned char uchar;typedef unsigned long long uvlong;typedef long long vlong; typedefstruct Qid{	uvlong	path;	u32int	vers;	uchar	type;} Qid; typedefstruct Dir {	/* system-modified data */	ushort	type;	/* server type */	uint	dev;	/* server subtype */	/* file data */	Qid	qid;	/* unique id from server */	u32int	mode;	/* permissions */	u32int	atime;	/* last read time */	u32int	mtime;	/* last write time */	vlong	length;	/* file length */	char	*name;	/* last element of path */	char	*uid;	/* owner name */	char	*gid;	/* group name */	char	*muid;	/* last modifier name */} Dir; char	*strecpy(char*, char*, char*);long	readn(int, void*, long);int	fauth(int fd, char *aname);