commit 4fa1f0dc052968b41d2bdffd9cb9fcab8137cdaf
author Kevin Wolf <kwolf@redhat.com> Fri Oct 11 21:49:17 2019 +0200
committer Kevin Wolf <kwolf@redhat.com> Mon Oct 14 17:12:48 2019 +0200
tree adc04289e0c57cdef33b2cf07764c49257785312
parent 3e9297f3659701a72110f0f560b4cc22452972f1

qemu-io: Support help options for --object

Instead of parsing help options as normal object properties and
returning an error, provide the same help functionality as the system
emulator in qemu-io, too.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

qemu-io.c

diff --git a/qemu-io.c b/qemu-io.c
index f64eca6..91e3276 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -475,6 +475,13 @@
     },
 };
 
+static bool qemu_io_object_print_help(const char *type, QemuOpts *opts)
+{
+    if (user_creatable_print_help(type, opts)) {
+        exit(0);
+    }
+    return true;
+}
 
 static QemuOptsList file_opts = {
     .name = "file",
@@ -622,7 +629,7 @@
 
     qemu_opts_foreach(&qemu_object_opts,
                       user_creatable_add_opts_foreach,
-                      NULL, &error_fatal);
+                      qemu_io_object_print_help, &error_fatal);
 
     if (!trace_init_backends()) {
         exit(1);