/*  * 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 <u.h>#include <libc.h>#include <../boot/boot.h> voidgetpasswd(char *p, int len){	char c;	int i, n, fd; 	fd = open("#c/consctl", OWRITE);	if(fd < 0)		fatal("can't open consctl; please reboot");	write(fd, "rawon", 5); Prompt:			print("password: ");	n = 0;	for(;;){		do{			i = read(0, &c, 1);			if(i < 0)				fatal("can't read cons; please reboot");		}while(i == 0);		switch(c){		case '\n':			p[n] = '\0';			close(fd);			print("\n");			return;		case '\b':			if(n > 0)				n--;			break;		case 'u' - 'a' + 1:		/* cntrl-u */			print("\n");			goto Prompt;		default:			if(n < len - 1)				p[n++] = c;			break;		}	}}