fixed SIGWINCH in emperor and added emperor rescan master fifo command

core/emperor.c

@@ -1506,6 +1506,8 @@ int uwsgi_emperor_scanner_event(int fd) {
 
 }
 
+static void emperor_wakeup(int sn) {}
+
 void emperor_loop() {
 
 	// monitor a directory
@@ -1534,6 +1536,7 @@ void emperor_loop() {
 	}
 
 	signal(SIGPIPE, SIG_IGN);
+	signal(SIGWINCH, emperor_wakeup);
 	uwsgi_unix_signal(SIGINT, royal_death);
 	uwsgi_unix_signal(SIGTERM, royal_death);
 	uwsgi_unix_signal(SIGQUIT, royal_death);

core/fifo.c

@@ -48,6 +48,14 @@ static void subscriptions_blocker() {
 	}
 }
 
+static void emperor_rescan() {
+	if (uwsgi.emperor_pid > 0) {
+		if (kill(uwsgi.emperor_pid, SIGWINCH)) {
+			uwsgi_error("emperor_rescan()/kill()");
+		}
+	}
+}
+
 /*
 
 this is called as soon as possibile allowing plugins (or hooks) to override it
@@ -74,6 +82,7 @@ void uwsgi_master_fifo_prepare() {
 	uwsgi_fifo_table['+'] = uwsgi_cheaper_increase;
 	uwsgi_fifo_table['c'] = uwsgi_chain_reload;
 	uwsgi_fifo_table['C'] = uwsgi_go_cheap;
+	uwsgi_fifo_table['E'] = emperor_rescan;
 	uwsgi_fifo_table['f'] = uwsgi_refork_master;
 	uwsgi_fifo_table['l'] = uwsgi_log_reopen;
 	uwsgi_fifo_table['L'] = uwsgi_log_rotate;

uwsgiconfig.py

@@ -1,6 +1,6 @@
 # uWSGI build system
 
-uwsgi_version = '2.0.2'
+uwsgi_version = '2.0.3'
 
 import os
 import re