/*  * 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 <auth.h>#include "authlocal.h" enum {	ARgiveup = 100,}; static intdorpc(AuthRpc *rpc, char *verb, char *val, int len, AuthGetkey *getkey){	int ret; 	for(;;){		if((ret = auth_rpc(rpc, verb, val, len)) != ARneedkey && ret != ARbadkey)			return ret;		if(getkey == nil)			return ARgiveup;	/* don't know how */		if((*getkey)(rpc->arg) < 0)			return ARgiveup;	/* user punted */	}} UserPasswd*auth_getuserpasswd(AuthGetkey *getkey, char *fmt, ...){	AuthRpc *rpc;	char *f[3], *p, *params;	int fd;	va_list arg;	UserPasswd *up; 	up = nil;	rpc = nil;	params = nil; 	fd = open("/mnt/factotum/rpc", ORDWR);	if(fd < 0)		goto out;	rpc = auth_allocrpc(fd);	if(rpc == nil)		goto out;	quotefmtinstall();	/* just in case */	va_start(arg, fmt);	params = vsmprint(fmt, arg);	va_end(arg);	if(params == nil)		goto out; 	if(dorpc(rpc, "start", params, strlen(params), getkey) != ARok	|| dorpc(rpc, "read", nil, 0, getkey) != ARok)		goto out; 	rpc->arg[rpc->narg] = '\0';	if(tokenize(rpc->arg, f, 2) != 2){		werrstr("bad answer from factotum");		goto out;	}	up = malloc(sizeof(*up)+rpc->narg+1);	if(up == nil)		goto out;	p = (char*)&up[1];	strcpy(p, f[0]);	up->user = p;	p += strlen(p)+1;	strcpy(p, f[1]);	up->passwd = p; out:	free(params);	auth_freerpc(rpc);	close(fd);	return up;}