#include <u.h>#define NOPLAN9DEFINES#include <libc.h> #include <sys/stat.h> extern int _p9dir(struct stat*, struct stat*, char*, Dir*, char**, char*); Dir*dirfstat(int fd){	struct stat st;	int nstr;	Dir *d;	char *str, tmp[100]; 	if(fstat(fd, &st) < 0)		return nil; 	snprint(tmp, sizeof tmp, "/dev/fd/%d", fd);	nstr = _p9dir(&st, &st, tmp, nil, nil, nil);	d = mallocz(sizeof(Dir)+nstr, 1);	if(d == nil)		return nil;	str = (char*)&d[1];	_p9dir(&st, &st, tmp, d, &str, str+nstr);	return d;}