#include <u.h>#include <libc.h>#include <fcall.h>#include <thread.h>#include <9p.h> #define MAXDEEPDIR	16	/* maximum levels of directory */#define MAXPATH		1024#define PATHBYTES	(sizeof(char) * MAXPATH) voidtruncfile(File *f, vlong l){	/** TODO: free queue */	f->length = l;} voidaccessfile(File *f, int a){	f->atime = time(0); 	if(a & AWRITE) {		f->mtime = f->atime;		f->qid.vers++;	}} char *fullpath(File *f){	char *path;	char *elem[MAXDEEPDIR];	int pos = 0, i; 	path = emalloc9p(PATHBYTES); 	memset(path, 0, PATHBYTES); 	while(strcmp(f->name, "/") != 0 && pos < MAXDEEPDIR) {		elem[pos++] = f->name; 		f = f->parent;	} 	if(pos >= (MAXDEEPDIR - 1))		return nil; 	elem[pos++] = f->name; 	for(i = pos - 1; i >= 0; i--) {		path = strncat(path, elem[i], PATHBYTES); 		if(i < (pos - 1) && i > 0)			path = strncat(path, "/", PATHBYTES);	} 	return path;}