+ debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
+ fd, strerror(errno));
+}
+
+void
+unset_nonblock(int fd)
+{
+ int val;
+
+ val = fcntl(fd, F_GETFL, 0);
+ if (val < 0) {
+ error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
+ return;
+ }
+ if (!(val & O_NONBLOCK)) {
+ debug2("fd %d is not O_NONBLOCK", fd);
+ return;
+ }
+ debug("fd %d clearing O_NONBLOCK", fd);
+ val &= ~O_NONBLOCK;
+ if (fcntl(fd, F_SETFL, val) == -1)
+ debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
+ fd, strerror(errno));
+}
+
+/* disable nagle on socket */
+void
+set_nodelay(int fd)
+{
+ int opt;
+ socklen_t optlen;
+
+ optlen = sizeof opt;
+ if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) {
+ debug("getsockopt TCP_NODELAY: %.100s", strerror(errno));
+ return;
+ }
+ if (opt == 1) {
+ debug2("fd %d is TCP_NODELAY", fd);
+ return;
+ }
+ opt = 1;
+ debug2("fd %d setting TCP_NODELAY", fd);
+ if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1)
+ error("setsockopt TCP_NODELAY: %.100s", strerror(errno));