/*  * 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 <venti.h>#include <libsec.h>#include <thread.h> voidusage(void){	fprint(2, "usage: read [-h host] [-t type] score\n");	threadexitsall("usage");} voidthreadmain(int argc, char *argv[]){	int type, n;	uchar score[VtScoreSize];	uchar *buf;	VtConn *z;	char *host; 	fmtinstall('F', vtfcallfmt);	fmtinstall('V', vtscorefmt); 	host = nil;	type = -1;	ARGBEGIN{	case 'h':		host = EARGF(usage());		break;	case 't':		type = atoi(EARGF(usage()));		break;	default:		usage();		break;	}ARGEND 	if(argc != 1)		usage(); 	if(vtparsescore(argv[0], nil, score) < 0)		sysfatal("could not parse score '%s': %r", argv[0]); 	buf = vtmallocz(VtMaxLumpSize); 	z = vtdial(host);	if(z == nil)		sysfatal("could not connect to server: %r"); 	if(vtconnect(z) < 0)		sysfatal("vtconnect: %r"); 	if(type == -1){		n = -1;		for(type=0; type<VtMaxType; type++){			n = vtread(z, score, type, buf, VtMaxLumpSize);			if(n >= 0){				fprint(2, "venti/read%s%s %V %d\n", host ? " -h" : "", host ? host : "",					score, type);				break;			}		}	}else		n = vtread(z, score, type, buf, VtMaxLumpSize); 	vthangup(z);	if(n < 0)		sysfatal("could not read block: %r");	if(write(1, buf, n) != n)		sysfatal("write: %r");	threadexitsall(0);}