[PATCH 2/4] char: Factor out qemu_chr_print_types()

[Markus Armbruster <armbru@redhat.com>]

From: Kevin Wolf <kwolf@redhat.com>

We'll want to call the same from a non-QemuOpts code path.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20201023161312.460406-3-kwolf@redhat.com>
---
 include/chardev/char.h |  1 +
 chardev/char.c         | 16 ++++++++++------
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/include/chardev/char.h b/include/chardev/char.h
index db42f0a8c6..3b91645081 100644
--- a/include/chardev/char.h
+++ b/include/chardev/char.h
@@ -212,6 +212,7 @@ void qemu_chr_be_update_read_handlers(Chardev *s,
  */
 void qemu_chr_be_event(Chardev *s, QEMUChrEvent event);
 
+void qemu_chr_print_types(void);
 int qemu_chr_add_client(Chardev *s, int fd);
 Chardev *qemu_chr_find(const char *name);
 
diff --git a/chardev/char.c b/chardev/char.c
index 78553125d3..4d188bfa6f 100644
--- a/chardev/char.c
+++ b/chardev/char.c
@@ -633,6 +633,15 @@ ChardevBackend *qemu_chr_parse_opts(QemuOpts *opts, Error **errp)
     return backend;
 }
 
+void qemu_chr_print_types(void)
+{
+    g_autoptr(GString) str = g_string_new("");
+
+    chardev_name_foreach(help_string_append, str);
+
+    qemu_printf("Available chardev backend types: %s\n", str->str);
+}
+
 Chardev *qemu_chr_new_from_opts(QemuOpts *opts, GMainContext *context,
                                 Error **errp)
 {
@@ -644,12 +653,7 @@ Chardev *qemu_chr_new_from_opts(QemuOpts *opts, GMainContext *context,
     char *bid = NULL;
 
     if (name && is_help_option(name)) {
-        GString *str = g_string_new("");
-
-        chardev_name_foreach(help_string_append, str);
-
-        qemu_printf("Available chardev backend types: %s\n", str->str);
-        g_string_free(str, true);
+        qemu_chr_print_types();
         return NULL;
     }
 
-- 
2.26.2