added --emperor-wrapper

core/emperor.c

@@ -1039,7 +1039,7 @@ static void uwsgi_emperor_spawn_vassal(struct uwsgi_instance *n_ui) {
 
 		char **vassal_argv = uwsgi_malloc(sizeof(char *) * counter);
 		// set args
-		vassal_argv[0] = uwsgi.binary_path;
+		vassal_argv[0] = uwsgi.emperor_wrapper ? uwsgi.emperor_wrapper: uwsgi.binary_path;
 
 		char *colon = NULL;
 

core/uwsgi.c

@@ -173,6 +173,7 @@ static struct uwsgi_option uwsgi_base_options[] = {
 	{"master", no_argument, 'M', "enable master process", uwsgi_opt_true, &uwsgi.master_process, 0},
 	{"honour-stdin", no_argument, 0, "do not remap stdin to /dev/null", uwsgi_opt_true, &uwsgi.honour_stdin, 0},
 	{"emperor", required_argument, 0, "run the Emperor", uwsgi_opt_add_string_list, &uwsgi.emperor, 0},
+	{"emperor-wrapper", required_argument, 0, "set a binary wrapper for vassals", uwsgi_opt_set_str, &uwsgi.emperor_wrapper, 0},
 	{"emperor-nofollow", no_argument, 0, "do not follow symlinks when checking for mtime", uwsgi_opt_true, &uwsgi.emperor_nofollow, 0},
 	{"emperor-procname", required_argument, 0, "set the Emperor process name", uwsgi_opt_set_str, &uwsgi.emperor_procname, 0},
 	{"emperor-freq", required_argument, 0, "set the Emperor scan frequency (default 3 seconds)", uwsgi_opt_set_int, &uwsgi.emperor_freq, 0},

uwsgi.h

@@ -1870,6 +1870,7 @@ struct uwsgi_server {
 	int emperor_clone;
 	char *pivot_root;
 #endif
+	char *emperor_wrapper;
 
 #ifdef __FreeBSD__
 	char *jail;