#include <u.h>#include <libc.h>#include <auth.h>#include "authsrv.h" voidgetpass(char *key, int check){	char pass[32], rpass[32];	char *err; 	readln("Password: ", pass, sizeof pass, 1);	readln("Confirm password: ", rpass, sizeof rpass, 1);	if(strcmp(pass, rpass) != 0)		error("password mismatch");	if(!passtokey(key, pass))		error("bad password");	if(check)		if(err = okpasswd(pass))			error(err);} voidreadln(char *prompt, char *line, int len, int raw){	char *p;	int fd, ctl, n, nr; 	fd = open("/dev/cons", ORDWR);	if(fd < 0)		error("couldn't open cons");	if(raw){		ctl = open("/dev/consctl", OWRITE);		if(ctl < 0)			error("couldn't set raw mode");		write(ctl, "rawon", 5);	} else		ctl = -1;	fprint(fd, "%s", prompt);	nr = 0;	p = line;	for(;;){		n = read(fd, p, 1);		if(n < 0){			close(fd);			close(ctl);			error("can't read cons\n");		}		if(*p == 0x7f)			exits(0);		if(n == 0 || *p == '\n' || *p == '\r'){			*p = '\0';			if(raw)				write(fd, "\n", 1);			close(fd);			close(ctl);			return;		}		if(*p == '\b'){			if(nr > 0){				nr--;				p--;			}		}else{			nr++;			p++;		}		if(nr == len){			fprint(fd, "line too long; try again\n");			nr = 0;			p = line;		}	}}