#include <u.h>#include <libc.h>#include <auth.h> intauth_getkey(char *params){	char *name;	int pid;	Waitmsg *w; 	/* start /factotum to query for a key */	name = unsharp("#9/bin/factotum");	if(name == nil || access(name, AEXEC) < 0){		werrstr("auth_getkey: no $PLAN9/bin/factotum: didn't get key %s", params);		return -1;	}	switch(pid = fork()){	case -1:		werrstr("can't fork for %s: %r", name);		return -1;	case 0:		execl(name, "getkey", "-g", params, nil);		exits(0);	default:		free(name);		for(;;){			w = wait();			if(w == nil)				break;			if(w->pid == pid){				if(w->msg[0] != '\0'){					free(w);					return -1;				}				free(w);				return 0;			}		}	}	return 0;}