init: Only do the init process setup if launched as "init"

We base this detection on the name of the binary: "init" means we've
been started as an init system.

When not running as an init system, we can skip the basic initialisation
as systemd or any other init system would have done that for us.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

Author: Damien Lespiau

src/init.c

@@ -1,4 +1,5 @@
 #define _GNU_SOURCE
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -1393,9 +1394,13 @@ static int hyper_setup_init_process(void)
 
 int main(int argc, char *argv[])
 {
-	char *cmdline, *ctl_serial, *tty_serial;
+	char *binary_name, *cmdline, *ctl_serial, *tty_serial;
+	bool is_init;
 
-	if (hyper_setup_init_process() < 0) {
+	binary_name = basename(argv[0]);
+	is_init = strncmp(binary_name, "init", 5) == 0;
+
+	if (is_init && hyper_setup_init_process() < 0) {
 		return -1;
 	}