util: unify implementations of freeze()

src/main.c

@@ -73,11 +73,6 @@ static char *arg_console = NULL;
 
 static FILE* serialization = NULL;
 
-_noreturn_ static void freeze(void) {
-        for (;;)
-                pause();
-}
-
 static void nop_handler(int sig) {
 }
 

src/shutdown.c

@@ -40,11 +40,6 @@
 #define FINALIZE_ATTEMPTS 50
 #define FINALIZE_CRITICAL_ATTEMPTS 10
 
-_noreturn_ static void freeze(void) {
-        for (;;)
-                pause();
-}
-
 static bool ignore_proc(pid_t pid) {
         if (pid == 1)
                 return true;
@@ -341,5 +336,5 @@ int main(int argc, char *argv[]) {
                 r = -r;
         log_error("Critical error while doing system shutdown: %s", strerror(r));
         freeze();
-        return 0;
+        return EXIT_FAILURE;
 }

src/util.c

@@ -3308,6 +3308,11 @@ int wait_for_terminate_and_warn(const char *name, pid_t pid) {
 
 }
 
+void freeze(void) {
+        for (;;)
+                pause();
+}
+
 static const char *const ioprio_class_table[] = {
         [IOPRIO_CLASS_NONE] = "none",
         [IOPRIO_CLASS_RT] = "realtime",

src/util.h

@@ -356,6 +356,8 @@ char *unquote(const char *s, const char *quotes);
 int wait_for_terminate(pid_t pid, siginfo_t *status);
 int wait_for_terminate_and_warn(const char *name, pid_t pid);
 
+_noreturn_ void freeze(void);
+
 #define NULSTR_FOREACH(i, l) \
         for ((i) = (l); (i) && *(i); (i) = strchr((i), 0)+1)