*: fix fallout from -Wunused-parameter

function                                             old     new   delta
bbunpack                                             358     366      +8
passwd_main                                         1070    1072      +2
handle_incoming_and_exit                            2651    2653      +2
getpty                                                88      86      -2
script_main                                          975     972      -3
inetd_main                                          2036    2033      -3
dname_enc                                            377     373      -4
make_new_session                                     474     462     -12
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/5 up/down: 12/-24)            Total: -12 bytes
   text    data     bss     dec     hex filename
 797429     658    7428  805515   c4a8b busybox_old
 797417     658    7428  805503   c4a7f busybox_unstripped

1 files changed, 18 insertions, 4 deletions

diff --git a/networking/ifupdown.c b/networking/ifupdown.c
index 6aa929a30..586c3db63 100644
--- a/networking/ifupdown.c
+++ b/networking/ifupdown.c
@@ -483,9 +483,9 @@ static const struct dhcp_client_t ext_dhcp_clients[] = {
 };
 #endif /* ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCPC */
 
+#if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
 static int dhcp_up(struct interface_defn_t *ifd, execfn *exec)
 {
-#if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
         int i;
 #if ENABLE_FEATURE_IFUPDOWN_IP
         /* ip doesn't up iface when it configures it (unlike ifconfig) */
@@ -498,7 +498,10 @@ static int dhcp_up(struct interface_defn_t *ifd, execfn *exec)
         }
         bb_error_msg("no dhcp clients found");
         return 0;
+}
 #elif ENABLE_APP_UDHCPC
+static int dhcp_up(struct interface_defn_t *ifd, execfn *exec)
+{
 #if ENABLE_FEATURE_IFUPDOWN_IP
         /* ip doesn't up iface when it configures it (unlike ifconfig) */
         if (!execute("ip link set %iface% up", ifd, exec))
@@ -507,14 +510,18 @@ static int dhcp_up(struct interface_defn_t *ifd, execfn *exec)
         return execute("udhcpc -R -n -p /var/run/udhcpc.%iface%.pid "
                         "-i %iface%[[ -H %hostname%]][[ -c %clientid%]][[ -s %script%]]",
                         ifd, exec);
+}
 #else
+static int dhcp_up(struct interface_defn_t *ifd ATTRIBUTE_UNUSED,
+                execfn *exec ATTRIBUTE_UNUSED)
+{
         return 0; /* no dhcp support */
-#endif
 }
+#endif
 
+#if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
 static int dhcp_down(struct interface_defn_t *ifd, execfn *exec)
 {
-#if ENABLE_FEATURE_IFUPDOWN_EXTERNAL_DHCP
         int i;
         for (i = 0; i < ARRAY_SIZE(ext_dhcp_clients); i++) {
                 if (exists_execable(ext_dhcp_clients[i].name))
@@ -522,13 +529,20 @@ static int dhcp_down(struct interface_defn_t *ifd, execfn *exec)
         }
         bb_error_msg("no dhcp clients found, using static interface shutdown");
         return static_down(ifd, exec);
+}
 #elif ENABLE_APP_UDHCPC
+static int dhcp_down(struct interface_defn_t *ifd, execfn *exec)
+{
         return execute("kill "
                        "`cat /var/run/udhcpc.%iface%.pid` 2>/dev/null", ifd, exec);
+}
 #else
+static int dhcp_down(struct interface_defn_t *ifd ATTRIBUTE_UNUSED,
+                execfn *exec ATTRIBUTE_UNUSED)
+{
         return 0; /* no dhcp support */
-#endif
 }
+#endif
 
 static int manual_up_down(struct interface_defn_t *ifd ATTRIBUTE_UNUSED, execfn *exec ATTRIBUTE_UNUSED)
 {