- int ret = write(client->sock,
- client->header_or_error.data() + client->header_or_error_bytes_sent,
- client->header_or_error.size() - client->header_or_error_bytes_sent);
+sending_header_or_error_again:
+ int ret;
+ do {
+ ret = write(client->sock,
+ client->header_or_error.data() + client->header_or_error_bytes_sent,
+ client->header_or_error.size() - client->header_or_error_bytes_sent);
+ } while (ret == -1 && errno == EINTR);
+
+ if (ret == -1 && errno == EAGAIN) {
+ // We're out of socket space, so now we're at the “low edge” of epoll's
+ // edge triggering. epoll will tell us when there is more room, so for now,
+ // just return.
+ // This is postcondition #4.
+ return;
+ }
+