- if (bufchain_size(chain) == 0)
- return bufchain_size(&stdout_data) + bufchain_size(&stderr_data);
-
- fl = fcntl(fd, F_GETFL);
- if (fl != -1 && !(fl & O_NONBLOCK))
- fcntl(fd, F_SETFL, fl | O_NONBLOCK);
- do {
- bufchain_prefix(chain, &senddata, &sendlen);
- ret = write(fd, senddata, sendlen);
- if (ret > 0)
- bufchain_consume(chain, ret);
- } while (ret == sendlen && bufchain_size(chain) != 0);
- if (fl != -1 && !(fl & O_NONBLOCK))
- fcntl(fd, F_SETFL, fl);
- if (ret < 0 && errno != EAGAIN) {
- perror(is_stderr ? "stderr: write" : "stdout: write");
- exit(1);
+ if (bufchain_size(chain) > 0) {
+ fl = fcntl(fd, F_GETFL);
+ if (fl != -1 && !(fl & O_NONBLOCK))
+ fcntl(fd, F_SETFL, fl | O_NONBLOCK);
+ do {
+ bufchain_prefix(chain, &senddata, &sendlen);
+ ret = write(fd, senddata, sendlen);
+ if (ret > 0)
+ bufchain_consume(chain, ret);
+ } while (ret == sendlen && bufchain_size(chain) != 0);
+ if (fl != -1 && !(fl & O_NONBLOCK))
+ fcntl(fd, F_SETFL, fl);
+ if (ret < 0 && errno != EAGAIN) {
+ perror(is_stderr ? "stderr: write" : "stdout: write");
+ exit(1);
+ }
+ }
+ if (outgoingeof == EOF_PENDING && bufchain_size(&stdout_data) == 0) {
+ close(STDOUT_FILENO);
+ outgoingeof = EOF_SENT;