*: 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

11 files changed, 57 insertions, 22 deletions

diff --git a/networking/Kbuild b/networking/Kbuild
index e06a124..44258e9 100644
--- a/networking/Kbuild
+++ b/networking/Kbuild
@@ -17,7 +17,7 @@ lib-$(CONFIG_FTPPUT)       += ftpgetput.o
 lib-$(CONFIG_HOSTNAME)     += hostname.o
 lib-$(CONFIG_HTTPD)        += httpd.o
 lib-$(CONFIG_IFCONFIG)     += ifconfig.o interface.o
-lib-$(CONFIG_IFENSLAVE)    += ifenslave.o
+lib-$(CONFIG_IFENSLAVE)    += ifenslave.o interface.o
 lib-$(CONFIG_IFUPDOWN)     += ifupdown.o
 lib-$(CONFIG_INETD)        += inetd.o
 lib-$(CONFIG_IP)           += ip.o
diff --git a/networking/ether-wake.c b/networking/ether-wake.c
index b752152..fcd7dd2 100644
--- a/networking/ether-wake.c
+++ b/networking/ether-wake.c
@@ -179,7 +179,7 @@ static int get_wol_pw(const char *ethoptarg, unsigned char *wol_passwd)
 }
 
 int ether_wake_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ether_wake_main(int argc, char **argv)
+int ether_wake_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	const char *ifname = "eth0";
 	char *pass;
diff --git a/networking/httpd.c b/networking/httpd.c
index 54f288c..522e7ee 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -1972,7 +1972,11 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
 			/* Try and do our best to parse more lines */
 			if ((STRNCASECMP(iobuf, "Content-length:") == 0)) {
 				/* extra read only for POST */
-				if (prequest != request_GET && prequest != request_HEAD) {
+				if (prequest != request_GET
+#if ENABLE_FEATURE_HTTPD_CGI
+				 && prequest != request_HEAD
+#endif
+				) {
 					tptr = iobuf + sizeof("Content-length:") - 1;
 					if (!tptr[0])
 						send_headers_and_exit(HTTP_BAD_REQUEST);
@@ -2129,7 +2133,12 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
 	 */
 
 	send_file_and_exit(tptr,
-		(prequest != request_HEAD ? SEND_HEADERS_AND_BODY : SEND_HEADERS));
+#if ENABLE_FEATURE_HTTPD_CGI
+		(prequest != request_HEAD ? SEND_HEADERS_AND_BODY : SEND_HEADERS)
+#else
+		SEND_HEADERS_AND_BODY
+#endif
+	);
 }
 
 /*
diff --git a/networking/ifupdown.c b/networking/ifupdown.c
index 6aa929a..586c3db 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)
 {
diff --git a/networking/inetd.c b/networking/inetd.c
index 0ddfa6b..b931aa1 100644
--- a/networking/inetd.c
+++ b/networking/inetd.c
@@ -1331,10 +1331,10 @@ int inetd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 				continue; /* -> check next fd in fd set */
 			}
 
-			/* we are either child or didn't fork at all */
+			/* we are either child or didn't vfork at all */
 #ifdef INETD_BUILTINS_ENABLED
 			if (sep->se_builtin) {
-				if (pid) { /* "pid" is -1: we did fork */
+				if (pid) { /* "pid" is -1: we did vfork */
 					close(sep->se_fd); /* listening socket */
 					logmode = 0; /* make xwrite etc silent */
 				}
@@ -1343,8 +1343,8 @@ int inetd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 					sep->se_builtin->bi_stream_fn(ctrl, sep);
 				else
 					sep->se_builtin->bi_dgram_fn(ctrl, sep);
-				if (pid) /* we did fork */
-					_exit(0);
+				if (pid) /* we did vfork */
+					_exit(1);
 				maybe_close(accepted_fd);
 				continue; /* -> check next fd in fd set */
 			}
@@ -1430,11 +1430,15 @@ static void echo_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
 		xwrite(s, line, sz);
 	}
 #else
+	/* We are after vfork here! */
 	static const char *const args[] = { "cat", NULL };
-	/* no error messages */
+	/* move network socket to stdin */
+	xmove_fd(s, STDIN_FILENO);
+	xdup2(STDIN_FILENO, STDOUT_FILENO);
+	/* no error messages please... */
 	xmove_fd(xopen("/dev/null", O_WRONLY), STDERR_FILENO);
 	BB_EXECVP("cat", (char**)args);
-	_exit(1);
+	/* on failure we return to main, which does exit(1) */
 #endif
 }
 static void echo_dg(int s, servtab_t *sep)
@@ -1463,11 +1467,15 @@ static void discard_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
 	while (safe_read(s, line, LINE_SIZE) > 0)
 		continue;
 #else
+	/* We are after vfork here! */
 	static const char *const args[] = { "dd", "of=/dev/null", NULL };
+	/* move network socket to stdin */
+	xmove_fd(s, STDIN_FILENO);
+	xdup2(STDIN_FILENO, STDOUT_FILENO);
 	/* no error messages */
 	xmove_fd(xopen("/dev/null", O_WRONLY), STDERR_FILENO);
 	BB_EXECVP("dd", (char**)args);
-	_exit(1);
+	/* on failure we return to main, which does exit(1) */
 #endif
 }
 /* ARGSUSED */
diff --git a/networking/nc.c b/networking/nc.c
index 7c2aafa..7d4a6e0 100644
--- a/networking/nc.c
+++ b/networking/nc.c
@@ -17,7 +17,7 @@
  * when compared to "standard" nc
  */
 
-static void timeout(int signum)
+static void timeout(int signum ATTRIBUTE_UNUSED)
 {
 	bb_error_msg_and_die("timed out");
 }
diff --git a/networking/sendmail.c b/networking/sendmail.c
index 241028b..2eb01dc 100644
--- a/networking/sendmail.c
+++ b/networking/sendmail.c
@@ -551,11 +551,11 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
 			int rc;
 
 			// retrieve message in ./tmp/
-			pop3_check(retr, (const char *)nmsg);
+			pop3_check(retr, (const char *)(ptrdiff_t)nmsg);
 			pop3_message(filename);
 			// delete message from server
 			if (opts & OPTF_z)
-				pop3_check("DELE %u", (const char*)nmsg);
+				pop3_check("DELE %u", (const char*)(ptrdiff_t)nmsg);
 
 			// run postprocessing program
 			if (*fargs) {
diff --git a/networking/telnetd.c b/networking/telnetd.c
index 20c5792..2ed3b74 100644
--- a/networking/telnetd.c
+++ b/networking/telnetd.c
@@ -161,14 +161,14 @@ make_new_session(
 	const char *login_argv[2];
 	struct termios termbuf;
 	int fd, pid;
-	char tty_name[32];
+	char tty_name[GETPTY_BUFSIZE];
 	struct tsession *ts = xzalloc(sizeof(struct tsession) + BUFSIZE * 2);
 
 	/*ts->buf1 = (char *)(ts + 1);*/
 	/*ts->buf2 = ts->buf1 + BUFSIZE;*/
 
 	/* Got a new connection, set up a tty. */
-	fd = getpty(tty_name, 32);
+	fd = getpty(tty_name);
 	if (fd < 0) {
 		bb_error_msg("can't create pty");
 		return NULL;
diff --git a/networking/traceroute.c b/networking/traceroute.c
index 582840a..c0b4a3f 100644
--- a/networking/traceroute.c
+++ b/networking/traceroute.c
@@ -729,6 +729,10 @@ pr_type(unsigned char t)
 }
 #endif
 
+#if !ENABLE_FEATURE_TRACEROUTE_VERBOSE
+#define packet_ok(buf, cc, from, seq) \
+	packet_ok(buf, cc, seq)
+#endif
 static int
 packet_ok(unsigned char *buf, int cc, struct sockaddr_in *from, int seq)
 {
diff --git a/networking/udhcp/clientsocket.c b/networking/udhcp/clientsocket.c
index b5534f8..0be661d 100644
--- a/networking/udhcp/clientsocket.c
+++ b/networking/udhcp/clientsocket.c
@@ -76,7 +76,7 @@ int raw_socket(int ifindex)
 		BPF_STMT(BPF_LD|BPF_W|BPF_IND, 0),
 		BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, SERVER_AND_CLIENT_PORTS, 0, 1),	/* L3, L4 */
 		/* returns */
-		BPF_STMT(BPF_RET|BPF_K, ~0UL),                          /* L3: pass */
+		BPF_STMT(BPF_RET|BPF_K, (~(uint32_t)0) ),               /* L3: pass */
 		BPF_STMT(BPF_RET|BPF_K, 0),                             /* L4: reject */
 	};
 	static const struct sock_fprog filter_prog = {
diff --git a/networking/wget.c b/networking/wget.c
index dc1dc2a..f8adcd7 100644
--- a/networking/wget.c
+++ b/networking/wget.c
@@ -189,7 +189,7 @@ static void progressmeter(int flag)
  */
 #else /* FEATURE_WGET_STATUSBAR */
 
-static ALWAYS_INLINE void progressmeter(int flag) { }
+static ALWAYS_INLINE void progressmeter(int flag ATTRIBUTE_UNUSED) { }
 
 #endif