*: 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

4 files changed, 26 insertions, 8 deletions

diff --git a/util-linux/fbset.c b/util-linux/fbset.c
index d616abd36..ab7770d4f 100644
--- a/util-linux/fbset.c
+++ b/util-linux/fbset.c
@@ -170,10 +170,10 @@ enum {
 };
 #endif
 
+#if ENABLE_FEATURE_FBSET_READMODE
 static int readmode(struct fb_var_screeninfo *base, const char *fn,
 					const char *mode)
 {
-#if ENABLE_FEATURE_FBSET_READMODE
 	FILE *f;
 	char buf[256];
 	char *p = buf;
@@ -257,11 +257,9 @@ static int readmode(struct fb_var_screeninfo *base, const char *fn,
 				return 1;
 		}
 	}
-#else
-	bb_error_msg("mode reading not compiled in");
-#endif
 	return 0;
 }
+#endif
 
 static inline void setmode(struct fb_var_screeninfo *base,
 					struct fb_var_screeninfo *set)
@@ -389,9 +387,13 @@ int fbset_main(int argc, char **argv)
 	fh = xopen(fbdev, O_RDONLY);
 	xioctl(fh, FBIOGET_VSCREENINFO, &var);
 	if (g_options & OPT_READMODE) {
+#if !ENABLE_FEATURE_FBSET_READMODE
+		bb_show_usage();
+#else
 		if (!readmode(&var, modefile, mode)) {
 			bb_error_msg_and_die("unknown video mode '%s'", mode);
 		}
+#endif
 	}
 
 	setmode(&var, &varset);
diff --git a/util-linux/fdisk.c b/util-linux/fdisk.c
index a75b4f817..dcfae96f5 100644
--- a/util-linux/fdisk.c
+++ b/util-linux/fdisk.c
@@ -128,7 +128,11 @@ static unsigned read_int(unsigned low, unsigned dflt, unsigned high, unsigned ba
 #endif
 static const char *partition_type(unsigned char type);
 static void get_geometry(void);
+#if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE
 static int get_boot(enum action what);
+#else
+static int get_boot(void);
+#endif
 
 #define PLURAL   0
 #define SINGULAR 1
@@ -1237,8 +1241,12 @@ get_geometry(void)
  *    0: found or created label
  *    1: I/O error
  */
-static int
-get_boot(enum action what)
+#if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE
+static int get_boot(enum action what)
+#else
+static int get_boot(void)
+#define get_boot(what) get_boot()
+#endif
 {
 	int i;
 
diff --git a/util-linux/script.c b/util-linux/script.c
index c37fd9d61..1c95ea550 100644
--- a/util-linux/script.c
+++ b/util-linux/script.c
@@ -29,7 +29,7 @@ int script_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	int attr_ok; /* NB: 0: ok */
 	int winsz_ok;
 	int pty;
-	char pty_line[32];
+	char pty_line[GETPTY_BUFSIZE];
 	struct termios tt, rtt;
 	struct winsize win;
 	const char *fname = "typescript";
@@ -69,7 +69,7 @@ int script_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		shell = DEFAULT_SHELL;
 	}
 
-	pty = getpty(pty_line, sizeof(pty_line));
+	pty = getpty(pty_line);
 	if (pty < 0) {
 		bb_perror_msg_and_die("can't get pty");
 	}
diff --git a/util-linux/volume_id/get_devname.c b/util-linux/volume_id/get_devname.c
index 75060b0d8..af03d07a3 100644
--- a/util-linux/volume_id/get_devname.c
+++ b/util-linux/volume_id/get_devname.c
@@ -26,6 +26,10 @@ static struct uuidCache_s {
 } *uuidCache;
 
 /* for now, only ext2, ext3 and xfs are supported */
+#if !ENABLE_FEATURE_VOLUMEID_ISO9660
+#define get_label_uuid(device, label, uuid, iso_only) \
+	get_label_uuid(device, label, uuid)
+#endif
 static int
 get_label_uuid(const char *device, char **label, char **uuid, int iso_only)
 {
@@ -83,6 +87,10 @@ uuidcache_addentry(char * device, int major, int minor, char *label, char *uuid)
 	memcpy(last->uuid, uuid, sizeof(last->uuid));
 }
 
+#if !ENABLE_FEATURE_VOLUMEID_ISO9660
+#define uuidcache_check_device(device_name, ma, mi, iso_only) \
+	uuidcache_check_device(device_name, ma, mi)
+#endif
 static void
 uuidcache_check_device(const char *device_name, int ma, int mi, int iso_only)
 {