#include <u.h>#include <libc.h>#include <venti.h>#include <libsec.h>#include <thread.h> enum{	Blocksize = 8192}; int chatty; voidusage(void){	fprint(2, "usage: writefile [-v] [-h host] < data\n");	threadexitsall("usage");} voidthreadmain(int argc, char *argv[]){	int n;	uchar score[VtScoreSize];	uchar *buf;	char *host;	vlong off;	VtEntry e;	VtRoot root;	VtCache *c;	VtConn *z;	VtFile *f; 	quotefmtinstall();	fmtinstall('F', vtfcallfmt);	fmtinstall('V', vtscorefmt); 	host = nil;	ARGBEGIN{	case 'V':		chattyventi++;		break;	case 'h':		host = EARGF(usage());		break;	case 'v':		chatty++;		break;	default:		usage();		break;	}ARGEND 	if(argc != 0)		usage(); 	buf = vtmallocz(Blocksize); 	z = vtdial(host);	if(z == nil)		sysfatal("could not connect to server: %r"); 	if(vtconnect(z) < 0)		sysfatal("vtconnect: %r"); 	// write file	c = vtcachealloc(z, Blocksize, 32);	if(c == nil)		sysfatal("vtcachealloc: %r");	f = vtfilecreateroot(c, Blocksize, Blocksize, VtDataType);	if(f == nil)		sysfatal("vtfilecreateroot: %r");	off = 0;	vtfilelock(f, VtOWRITE);	while((n = read(0, buf, Blocksize)) > 0){		if(vtfilewrite(f, buf, n, off) != n)			sysfatal("vtfilewrite: %r");		off += n;		if(vtfileflushbefore(f, off) < 0)			sysfatal("vtfileflushbefore: %r");	}	if(vtfileflush(f) < 0)		sysfatal("vtfileflush: %r");	if(vtfilegetentry(f, &e) < 0)		sysfatal("vtfilegetentry: %r");	vtfileunlock(f);		// write directory entry	memset(&root, 0, sizeof root);	vtentrypack(&e, buf, 0);	if(vtwrite(z, root.score, VtDirType, buf, VtEntrySize) < 0)		sysfatal("vtwrite dir: %r");		// write root	strcpy(root.name, "data");	strcpy(root.type, "file");	root.blocksize = Blocksize;	vtrootpack(&root, buf);	if(vtwrite(z, score, VtRootType, buf, VtRootSize) < 0)		sysfatal("vtwrite root: %r");		print("file:%V\n", score);	threadexitsall(0);}