fixed handling of EAGAIN in linux-sendfile (fixes #657)

git-svn-id: svn://svn.lighttpd.net/lighttpd/branches/lighttpd-1.4.x@2072 152afb58-edef-0310-8abb-c4023f1b3aa9

NEWS

@@ -23,6 +23,7 @@ NEWS
   * support chained proxies in mod_extforward (#1528)
   * fixed bogus "cgi died ?" if we kill the CGI process on shutdown
   * fixed ECONNRESET handling in network-openssl
+  * fixed handling of EAGAIN in network-linux-sendfile (#657)
 
 - 1.4.18 - 2007-09-09
 

src/network_linux_sendfile.c

@@ -162,6 +162,7 @@ int network_write_chunkqueue_linuxsendfile(server *srv, connection *con, int fd,
 				switch (errno) {
 				case EAGAIN:
 				case EINTR:
+					/* ok, we can't send more, let's try later again */
 					r = 0;
 					break;
 				case EPIPE:
@@ -172,9 +173,7 @@ int network_write_chunkqueue_linuxsendfile(server *srv, connection *con, int fd,
 							"sendfile failed:", strerror(errno), fd);
 					return -1;
 				}
-			}
-
-			if (r == 0) {
+			} else if (r == 0) {
 				int oerrno = errno;
 				/* We got an event to write but we wrote nothing
 				 *