pr-helper: fix --socket-path default in help

Currently --help shows "(default '(null)')" for the -k/--socket-path
option.  Fix it by getting the default path in /var/run.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

diff --git a/scsi/qemu-pr-helper.c b/scsi/qemu-pr-helper.c
index d0f83176e1a63547a28282849c228cf2e7acd5a2..4057cf355c361b02eee277c26dbba40e3d36c0cb 100644 (file)
--- a/scsi/qemu-pr-helper.c
+++ b/scsi/qemu-pr-helper.c
@@ -74,8 +74,16 @@ static int uid = -1;
 static int gid = -1;
 #endif
 
+static void compute_default_paths(void)
+{
+    if (!socket_path) {
+        socket_path = qemu_get_local_state_pathname("run/qemu-pr-helper.sock");
+    }
+}
+
 static void usage(const char *name)
 {
+    compute_default_paths();
     (printf) (
 "Usage: %s [OPTIONS] FILE\n"
 "Persistent Reservation helper program for QEMU\n"
@@ -845,13 +853,6 @@ static const char *socket_activation_validate_opts(void)
     return NULL;
 }
 
-static void compute_default_paths(void)
-{
-    if (!socket_path) {
-        socket_path = qemu_get_local_state_pathname("run/qemu-pr-helper.sock");
-    }
-}
-
 static void termsig_handler(int signum)
 {
     atomic_cmpxchg(&state, RUNNING, TERMINATE);