opt: add support for showing default value.

[ccan] / ccan / opt / opt.c

diff --git a/ccan/opt/opt.c b/ccan/opt/opt.c
index f601bb69952185770923f83741fb3e0554e06dc9..236d2af00d20027d8f1b505f2b7ad2ec429f4ac4 100644 (file)
--- a/ccan/opt/opt.c
+++ b/ccan/opt/opt.c
@@ -31,6 +31,7 @@ static void add_opt(const struct opt_table *entry)
 void _opt_register(const char *longopt, char shortopt, enum opt_flags flags,
                   char *(*cb)(void *arg),
                   char *(*cb_arg)(const char *optarg, void *arg),
+                  void (*show)(char buf[OPT_SHOW_LEN], const void *arg),
                   void *arg, const char *desc)
 {
        struct opt_table opt;
@@ -39,6 +40,7 @@ void _opt_register(const char *longopt, char shortopt, enum opt_flags flags,
        opt.flags = flags;
        opt.cb = cb;
        opt.cb_arg = cb_arg;
+       opt.show = show;
        opt.arg = arg;
        opt.desc = desc;
        check_opt(&opt);