From: David Härdeman <david@hardeman.nu>
Date: Sun, 5 Oct 2025 15:32:52 +0000 (+0200)
Subject: odhcpd: print compiled-in features in help message
X-Git-Url: http://git.openwrt.org/?a=commitdiff_plain;h=63617a2d2df02054d9d55b2aa2dd56249339fdf1;p=project%2Fodhcpd.git

odhcpd: print compiled-in features in help message

This is mostly useful for hacking, as a way to quickly determine from the command-line
how odhcpd has been built. But I also plan to use it in LuCI [1].

[1] https://github.com/openwrt/luci/blob/master/modules/luci-base/root/usr/share/rpcd/ucode/luci

Signed-off-by: David Härdeman <david@hardeman.nu>
Link: https://github.com/openwrt/odhcpd/pull/268
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
---

diff --git a/src/odhcpd.c b/src/odhcpd.c
index 1cab203..9bb9ddc 100644
--- a/src/odhcpd.c
+++ b/src/odhcpd.c
@@ -55,6 +55,23 @@ static void sighandler(_unused int signal)
 static void print_usage(const char *app)
 {
 	printf("== %s Usage ==\n"
+	       "Features: ra ndp dhcpv6"
+#ifdef DHCPV4_SUPPORT
+	       " dhcpv4"
+#else
+	       " no-dhcpv4"
+#endif /* DHCPV4_SUPPORT */
+#ifdef UBUS
+	       " ubus"
+#else
+	       " no-ubus"
+#endif /* UBUS */
+#ifdef EXT_CER_ID
+	       " cer"
+#else
+	       " no-cer"
+#endif /* EXT_CER_ID */
+	       "\n"
 	       "\n"
 	       "	-c <path>	Use an alternative configuration file\n"
 	       "	-l <int>	Specify log level 0..7 (default %d)\n"