#include <u.h>#include <libc.h>#include <thread.h> enum{	STACK = 32768,}; voidusage(void){	fprint(2, "usage: dial [-e] addr\n");	threadexitsall("usage");} int waitforeof;voidtxproc(void *v){	int fd;	char buf[8192];	int n; 	fd = (int)v;	while((n = read(0, buf, sizeof buf)) > 0)		if(write(fd, buf, n) < 0)			break; 	if(!waitforeof)		threadexitsall(nil);} voidthreadmain(int argc, char **argv){	int fd;	char buf[8192];	int n; 	ARGBEGIN{	case 'e':		waitforeof = 1;		break;	default:		usage();	}ARGEND 	if(argc != 1)		usage(); 	if((fd = dial(argv[0], nil, nil, nil)) < 0)		sysfatal("dial: %r"); 	proccreate(txproc, (void*)fd, STACK); 	while((n = read(fd, buf, sizeof buf)) > 0)		if(write(1, buf, n) < 0)			break; 	threadexitsall(nil);}