qemu-io: Move 'quit' function

This one only makes sense in the context of the qemu-io tool, so move it
to qemu-io.c. Adapt coding style and register it like other commands.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

cmd.c

@@ -410,32 +410,3 @@ timestr(
 		snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000));
 	}
 }
-
-
-/* from libxcmd/quit.c */
-
-static cmdinfo_t quit_cmd;
-
-/* ARGSUSED */
-static int
-quit_f(
-    BlockDriverState *bs,
-	int	argc,
-	char	**argv)
-{
-	return 1;
-}
-
-void
-quit_init(void)
-{
-	quit_cmd.name = _("quit");
-	quit_cmd.altname = _("q");
-	quit_cmd.cfunc = quit_f;
-	quit_cmd.argmin = -1;
-	quit_cmd.argmax = -1;
-	quit_cmd.flags = CMD_FLAG_GLOBAL;
-	quit_cmd.oneline = _("exit the program");
-
-	add_command(&quit_cmd);
-}

cmd.h

@@ -42,8 +42,6 @@ typedef struct cmdinfo {
 extern cmdinfo_t	*cmdtab;
 extern int		ncmds;
 
-void quit_init(void);
-
 typedef int (*checkfunc_t)(BlockDriverState *bs, const cmdinfo_t *ci);
 
 void add_command(const cmdinfo_t *ci);

qemu-io.c

@@ -137,6 +137,21 @@ static int open_f(BlockDriverState *bs, int argc, char **argv)
     return openfile(argv[optind], flags, growable);
 }
 
+static int quit_f(BlockDriverState *bs, int argc, char **argv)
+{
+    return 1;
+}
+
+static const cmdinfo_t quit_cmd = {
+    .name       = "quit",
+    .altname    = "q",
+    .cfunc      = quit_f,
+    .argmin     = -1,
+    .argmax     = -1,
+    .flags      = CMD_FLAG_GLOBAL,
+    .oneline    = "exit the program",
+};
+
 static void usage(const char *name)
 {
     printf(
@@ -247,7 +262,7 @@ int main(int argc, char **argv)
     bdrv_init();
 
     /* initialize commands */
-    quit_init();
+    add_command(&quit_cmd);
     add_command(&open_cmd);
     add_command(&close_cmd);