227 pid_t xpopen_both(char **argv, int *pipes)  in xpopen_both()  argument
233   if (pipes) for (pid = 0; pid < 2; pid++) {  in xpopen_both()
234     if (pipes[pid] != -1) continue;  in xpopen_both()
241     if (pipes) {  in xpopen_both()
248         pipes[1] = cestnepasun[3];  in xpopen_both()
254         pipes[0] = cestnepasun[0];  in xpopen_both()
258       if (!pipes[1]) pipes[1] = dup(0);  in xpopen_both()
261       if (pipes[0]) {  in xpopen_both()
262         dup2(pipes[0], 0);  in xpopen_both()
263         close(pipes[0]);  in xpopen_both()
267       if (pipes[1] != 1) {  in xpopen_both()
268         dup2(pipes[1], 1);  in xpopen_both()
269         close(pipes[1]);  in xpopen_both()
298   if (pipes) {  in xpopen_both()
300       pipes[0] = cestnepasun[1];  in xpopen_both()
304       pipes[1] = cestnepasun[2];  in xpopen_both()
322 int xpclose_both(pid_t pid, int *pipes)  in xpclose_both()  argument
324   if (pipes) {  in xpclose_both()
325     close(pipes[0]);  in xpclose_both()
326     close(pipes[1]);  in xpclose_both()
335   int pipes[2], pid;  in xpopen()  local
337   pipes[0] = isstdout ? 0 : -1;  in xpopen()
338   pipes[1] = isstdout ? -1 : 1;  in xpopen()
339   pid = xpopen_both(argv, pipes);  in xpopen()
340   *pipe = pid ? pipes[!!isstdout] : -1;  in xpopen()