ttyd: log to syslog

Signed-off-by: Richard Yu <yurichard3839@gmail.com>

utils/ttyd/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ttyd
 PKG_VERSION:=1.5.2
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/tsl0922/ttyd/tar.gz/$(PKG_VERSION)?

utils/ttyd/patches/100-log-to-syslog.patch

@@ -0,0 +1,20 @@
+--- a/src/server.c
++++ b/src/server.c
+@@ -6,6 +6,7 @@
+ #include <getopt.h>
+ #include <signal.h>
+ #include <sys/stat.h>
++#include <syslog.h>
+ 
+ #include <libwebsockets.h>
+ #include <json.h>
+@@ -418,7 +419,8 @@ main(int argc, char **argv) {
+         return -1;
+     }
+ 
+-    lws_set_log_level(debug_level, NULL);
++    openlog("ttyd", LOG_NDELAY | LOG_PID, LOG_DAEMON);
++    lws_set_log_level(debug_level, lwsl_emit_syslog);
+ 
+ #if LWS_LIBRARY_VERSION_MAJOR >= 2
+     char server_hdr[128] = "";