/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <errno.h>#include <unistd.h>#include "lib.h"#include "sys9.h" ssize_twrite(int d, const void *buf, size_t nbytes){	int n; 	if(d<0 || d>=OPEN_MAX || !(_fdinfo[d].flags&FD_ISOPEN)){		errno = EBADF;		return -1;	}	if(_fdinfo[d].oflags&O_APPEND)		_SEEK(d, 0, 2);	n = _WRITE(d, buf, nbytes);	if(n < 0)		_syserrno();	return n;}