266 	int pvec[2];  local
276 	if ((mode & 1) && pipe(pvec) < 0) {
289 			close(pvec[0]);
290 			close(pvec[1]);
304 			close(pvec[0]);
306 			dup(pvec[1]);
311 			close(pvec[1]);
329 		io = pvec[0];
330 		close(pvec[1]);
373 	static int pvec[2];  in vi_filter()  local
383 		if (pipe(pvec) < 0)  in vi_filter()
386 		io = pvec[0];  in vi_filter()
389 			close(pvec[1]);  in vi_filter()
395 			io = pvec[1];  in vi_filter()
396 			close(pvec[0]);  in vi_filter()
406 		close(pvec[1]);  in vi_filter()
407 		io = pvec[0];  in vi_filter()
410 	f = unixex("-c", uxb, (mode & 2) ? pvec[0] : 0, mode);  in vi_filter()
446 	static int pvec[2];  in recover()  local
448 	if (pipe(pvec) < 0)  in recover()
451 	io = pvec[0];  in recover()
453 		close(pvec[1]);  in recover()
461 		dup(pvec[1]);  in recover()
462 	        close(pvec[1]);  in recover()
475 	close(pvec[1]);  in recover()