*: add -Wunused-parameter; fix resulting breakage

function                                             old     new   delta
procps_scan                                         1265    1298     +33
aliascmd                                             278     283      +5
parse_file_cmd                                       116     120      +4
dname_enc                                            373     377      +4
setcmd                                                90      93      +3
execcmd                                               57      60      +3
count_lines                                           72      74      +2
process_command_subs                                 340     339      -1
test_main                                            409     407      -2
mknod_main                                           179     177      -2
handle_incoming_and_exit                            2653    2651      -2
argstr                                              1312    1310      -2
shiftcmd                                             131     128      -3
exitcmd                                               46      43      -3
dotcmd                                               297     294      -3
breakcmd                                              86      83      -3
evalpipe                                             353     349      -4
evalcommand                                         1180    1176      -4
evalcmd                                              109     105      -4
send_tree                                            374     369      -5
mkfifo_main                                           82      77      -5
evalsubshell                                         152     147      -5
typecmd                                               75      69      -6
letcmd                                                61      55      -6
add_cmd                                             1190    1183      -7
main                                                 891     883      -8
ash_main                                            1415    1407      -8
parse_stream                                        1377    1367     -10
alloc_procps_scan                                     55       -     -55
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 7/21 up/down: 54/-148)          Total: -94 bytes
   text    data     bss     dec     hex filename
 797195     658    7428  805281   c49a1 busybox_old
 797101     658    7428  805187   c4943 busybox_unstripped

Makefile.flags

@@ -20,6 +20,7 @@ CPPFLAGS += \
 # flag checks are grouped together to speed the checks up a bit..
 CFLAGS += $(call cc-option,-Wall -Wshadow -Wwrite-strings,)
 CFLAGS += $(call cc-option,-Wundef -Wstrict-prototypes,)
+CFLAGS += $(call cc-option,-Wunused -Wunused-parameter,)
 # If you want to add "-Wmissing-prototypes -Wmissing-declarations" above
 # (or anything else for that matter) make sure that it is still possible
 # to build bbox without warnings. Current offender: find.c:alloc_action().

archival/bbunzip.c

@@ -159,7 +159,7 @@ USE_DESKTOP(long long) int unpack_bunzip2(void)
 }
 
 int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int bunzip2_main(int argc, char **argv)
+int bunzip2_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	getopt32(argv, "cfvdt");
 	argv += optind;
@@ -257,7 +257,7 @@ USE_DESKTOP(long long) int unpack_gunzip(void)
 }
 
 int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int gunzip_main(int argc, char **argv)
+int gunzip_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	getopt32(argv, "cfvdt");
 	argv += optind;
@@ -295,7 +295,7 @@ USE_DESKTOP(long long) int unpack_unlzma(void)
 }
 
 int unlzma_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int unlzma_main(int argc, char **argv)
+int unlzma_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	getopt32(argv, "cf");
 	argv += optind;
@@ -337,7 +337,7 @@ USE_DESKTOP(long long) int unpack_uncompress(void)
 }
 
 int uncompress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int uncompress_main(int argc, char **argv)
+int uncompress_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	getopt32(argv, "cf");
 	argv += optind;

archival/dpkg.c

@@ -949,7 +949,7 @@ static int package_satisfies_dependency(int package, int depend_type)
 	return 0;
 }
 
-static int check_deps(deb_file_t **deb_file, int deb_start, int dep_max_count)
+static int check_deps(deb_file_t **deb_file, int deb_start /*, int dep_max_count - ?? */)
 {
 	int *conflicts = NULL;
 	int conflicts_num = 0;
@@ -1689,7 +1689,7 @@ int dpkg_main(int argc, char **argv)
 
 	/* Check that the deb file arguments are installable */
 	if (!(opt & OPT_force_ignore_depends)) {
-		if (!check_deps(deb_file, 0, deb_count)) {
+		if (!check_deps(deb_file, 0 /*, deb_count*/)) {
 			bb_error_msg_and_die("dependency check failed");
 		}
 	}

console-tools/clear.c

@@ -13,7 +13,7 @@
 #include "libbb.h"
 
 int clear_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int clear_main(int argc, char **argv)
+int clear_main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 {
 	return printf("\033[H\033[J") != 6;
 }

console-tools/loadfont.c

@@ -167,7 +167,7 @@ static void loadnewfont(int fd)
 }
 
 int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int loadfont_main(int argc, char **argv)
+int loadfont_main(int argc, char **argv ATTRIBUTE_UNUSED)
 {
 	int fd;
 

console-tools/loadkmap.c

@@ -26,7 +26,7 @@ struct kbentry {
 #define MAX_NR_KEYMAPS  256
 
 int loadkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int loadkmap_main(int argc, char **argv)
+int loadkmap_main(int argc, char **argv ATTRIBUTE_UNUSED)
 {
 	struct kbentry ke;
 	int i, j, fd;

console-tools/reset.c

@@ -18,7 +18,7 @@ int stty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 #endif
 
 int reset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int reset_main(int argc, char **argv)
+int reset_main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 {
 	static const char *const args[] = {
 		"stty", "sane", NULL

console-tools/resize.c

@@ -21,10 +21,10 @@ onintr(int sig ATTRIBUTE_UNUSED)
 }
 
 int resize_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int resize_main(int argc, char **argv)
+int resize_main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 {
 	struct termios new;
-	struct winsize w = { 0,0,0,0 };
+	struct winsize w = { 0, 0, 0, 0 };
 	int ret;
 
 	/* We use _stderr_ in order to make resize usable

coreutils/cat.c

@@ -44,7 +44,7 @@ int bb_cat(char **argv)
 }
 
 int cat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int cat_main(int argc, char **argv)
+int cat_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	getopt32(argv, "u");
 	argv += optind;

coreutils/catv.c

@@ -13,7 +13,7 @@
 #include "libbb.h"
 
 int catv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int catv_main(int argc, char **argv)
+int catv_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int retval = EXIT_SUCCESS;
 	int fd;

coreutils/chmod.c

@@ -68,7 +68,7 @@ static int fileAction(const char *fileName, struct stat *statbuf, void* param, i
 }
 
 int chmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int chmod_main(int argc, char **argv)
+int chmod_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int retval = EXIT_SUCCESS;
 	char *arg, **argp;

coreutils/chown.c

@@ -42,7 +42,7 @@ typedef int (*chown_fptr)(const char *, uid_t, gid_t);
 static struct bb_uidgid_t ugid = { -1, -1 };
 
 static int fileAction(const char *fileName, struct stat *statbuf,
-		void *cf, int depth)
+		void *cf, int depth ATTRIBUTE_UNUSED)
 {
 	uid_t u = (ugid.uid == (uid_t)-1) ? statbuf->st_uid : ugid.uid;
 	gid_t g = (ugid.gid == (gid_t)-1) ? statbuf->st_gid : ugid.gid;
@@ -62,7 +62,7 @@ static int fileAction(const char *fileName, struct stat *statbuf,
 }
 
 int chown_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int chown_main(int argc, char **argv)
+int chown_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int retval = EXIT_SUCCESS;
 	int flags;

coreutils/comm.c

@@ -36,7 +36,7 @@ static void writeline(char *line, int class, int flags)
 }
 
 int comm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int comm_main(int argc, char **argv)
+int comm_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 #define LINE_LEN 100
 #define BB_EOF_0 0x1

coreutils/cut.c

@@ -162,7 +162,7 @@ static void cut_file(FILE *file, char delim)
 }
 
 int cut_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int cut_main(int argc, char **argv)
+int cut_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char delim = '\t';	/* delimiter, default is tab */
 	char *sopt, *ltok;

coreutils/du.c

@@ -141,7 +141,7 @@ static unsigned long du(const char *filename)
 }
 
 int du_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int du_main(int argc, char **argv)
+int du_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	unsigned long total;
 	int slink_depth_save;

coreutils/echo.c

@@ -31,7 +31,7 @@
  * using call -> jump optimization */
 
 int echo_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int echo_main(int argc, char **argv)
+int echo_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	const char *arg;
 #if !ENABLE_FEATURE_FANCY_ECHO

coreutils/env.c

@@ -40,7 +40,7 @@ static const char env_longopts[] ALIGN1 =
 #endif
 
 int env_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int env_main(int argc, char **argv)
+int env_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	/* cleanenv was static - why? */
 	char *cleanenv[1];

coreutils/expand.c

@@ -126,7 +126,7 @@ static void unexpand(FILE *file, unsigned int tab_size, unsigned opt)
 #endif
 
 int expand_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int expand_main(int argc, char **argv)
+int expand_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	/* Default 8 spaces for 1 tab */
 	const char *opt_t = "8";

coreutils/id.c

@@ -37,7 +37,7 @@ static int printf_full(unsigned int id, const char *arg, const char prefix)
 }
 
 int id_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int id_main(int argc, char **argv)
+int id_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	struct passwd *p;
 	uid_t uid;

coreutils/libcoreutils/coreutils.h

@@ -11,6 +11,6 @@ typedef int (*stat_func)(const char *fn, struct stat *ps);
 int cp_mv_stat2(const char *fn, struct stat *fn_stat, stat_func sf);
 int cp_mv_stat(const char *fn, struct stat *fn_stat);
 
-mode_t getopt_mk_fifo_nod(int argc, char **argv);
+mode_t getopt_mk_fifo_nod(char **argv);
 
 #endif

coreutils/libcoreutils/getopt_mk_fifo_nod.c

@@ -23,7 +23,7 @@
 #include "libbb.h"
 #include "coreutils.h"
 
-mode_t getopt_mk_fifo_nod(int argc, char **argv)
+mode_t getopt_mk_fifo_nod(char **argv)
 {
 	mode_t mode = 0666;
 	char *smode = NULL;

coreutils/mkfifo.c

@@ -14,12 +14,12 @@
 #include "libcoreutils/coreutils.h"
 
 int mkfifo_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int mkfifo_main(int argc, char **argv)
+int mkfifo_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	mode_t mode;
 	int retval = EXIT_SUCCESS;
 
-	mode = getopt_mk_fifo_nod(argc, argv);
+	mode = getopt_mk_fifo_nod(argv);
 
 	argv += optind;
 	if (!*argv) {

coreutils/mknod.c

@@ -24,7 +24,7 @@ int mknod_main(int argc, char **argv)
 	dev_t dev;
 	const char *name;
 
-	mode = getopt_mk_fifo_nod(argc, argv);
+	mode = getopt_mk_fifo_nod(argv);
 	argv += optind;
 	argc -= optind;
 

coreutils/pwd.c

@@ -12,7 +12,7 @@
 /* This is a NOFORK applet. Be very careful! */
 
 int pwd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int pwd_main(int argc, char **argv)
+int pwd_main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 {
 	char *buf;
 

coreutils/readlink.c

@@ -11,7 +11,7 @@
 #include "libbb.h"
 
 int readlink_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int readlink_main(int argc, char **argv)
+int readlink_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char *buf;
 	char *fname;

coreutils/rm.c

@@ -20,7 +20,7 @@
 /* This is a NOFORK applet. Be very careful! */
 
 int rm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int rm_main(int argc, char **argv)
+int rm_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int status = 0;
 	int flags = 0;

coreutils/rmdir.c

@@ -19,7 +19,7 @@
 #define IGNORE_NON_EMPTY 0x02
 
 int rmdir_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int rmdir_main(int argc, char **argv)
+int rmdir_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int status = EXIT_SUCCESS;
 	int flags;

coreutils/sort.c

@@ -275,7 +275,7 @@ static unsigned str2u(char **str)
 #endif
 
 int sort_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int sort_main(int argc, char **argv)
+int sort_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	FILE *fp, *outfile = stdout;
 	char *line, **lines = NULL;

coreutils/split.c

@@ -56,7 +56,7 @@ enum { READ_BUFFER_SIZE = COMMON_BUFSIZE - 1 };
 #define SPLIT_OPT_a (1<<2)
 
 int split_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int split_main(int argc, char **argv)
+int split_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	unsigned suffix_len = 2;
 	char *pfx;

coreutils/sync.c

@@ -14,8 +14,9 @@
 /* This is a NOFORK applet. Be very careful! */
 
 int sync_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int sync_main(int argc, char **argv)
+int sync_main(int argc, char **argv ATTRIBUTE_UNUSED)
 {
+	/* coreutils-6.9 compat */
 	bb_warn_ignoring_args(argc - 1);
 
 	sync();

coreutils/tac.c

@@ -26,7 +26,7 @@ struct lstring {
 };
 
 int tac_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int tac_main(int argc, char **argv)
+int tac_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char **name;
 	FILE *f;

coreutils/touch.c

@@ -22,7 +22,7 @@
 /* This is a NOFORK applet. Be very careful! */
 
 int touch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int touch_main(int argc, char **argv)
+int touch_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int fd;
 	int status = EXIT_SUCCESS;

coreutils/tr.c

@@ -174,7 +174,7 @@ static int complement(char *buffer, int buffer_len)
 }
 
 int tr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int tr_main(int argc, char **argv)
+int tr_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int output_length = 0, input_length;
 	int i;

coreutils/true.c

@@ -15,7 +15,7 @@
 /* This is a NOFORK applet. Be very careful! */
 
 int true_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int true_main(int argc, char **argv)
+int true_main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 {
 	return EXIT_SUCCESS;
 }

coreutils/tty.c

@@ -13,7 +13,7 @@
 #include "libbb.h"
 
 int tty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int tty_main(int argc, char **argv)
+int tty_main(int argc, char **argv SKIP_INCLUDE_SUSv2(ATTRIBUTE_UNUSED))
 {
 	const char *s;
 	USE_INCLUDE_SUSv2(int silent;)	/* Note: No longer relevant in SUSv3. */
@@ -22,15 +22,17 @@ int tty_main(int argc, char **argv)
 	xfunc_error_retval = 2;	/* SUSv3 requires > 1 for error. */
 
 	USE_INCLUDE_SUSv2(silent = getopt32(argv, "s");)
+	USE_INCLUDE_SUSv2(argc -= optind;)
+	SKIP_INCLUDE_SUSv2(argc -= 1;)
 
 	/* gnu tty outputs a warning that it is ignoring all args. */
-	bb_warn_ignoring_args(argc - optind);
+	bb_warn_ignoring_args(argc);
 
 	retval = 0;
 
 	s = ttyname(0);
 	if (s == NULL) {
-	/* According to SUSv3, ttyname can on fail with EBADF or ENOTTY.
+	/* According to SUSv3, ttyname can fail with EBADF or ENOTTY.
 	 * We know the file descriptor is good, so failure means not a tty. */
 		s = "not a tty";
 		retval = 1;

coreutils/uniq.c

@@ -28,7 +28,7 @@ static FILE *xgetoptfile_uniq_s(char **argv, int read0write2)
 }
 
 int uniq_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int uniq_main(int argc, char **argv)
+int uniq_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	FILE *in, *out;
 	unsigned long dups, skip_fields, skip_chars, i;

coreutils/uudecode.c

@@ -127,7 +127,7 @@ static void read_base64(FILE *src_stream, FILE *dst_stream)
 }
 
 int uudecode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int uudecode_main(int argc, char **argv)
+int uudecode_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	FILE *src_stream = stdin;
 	char *outname = NULL;

coreutils/wc.c

@@ -69,7 +69,7 @@ enum {
 };
 
 int wc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int wc_main(int argc, char **argv)
+int wc_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	FILE *fp;
 	const char *s, *arg;

coreutils/who.c

@@ -41,7 +41,7 @@ static void idle_string(char *str6, time_t t)
 }
 
 int who_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int who_main(int argc, char **argv)
+int who_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char str6[6];
 	struct utmp *ut;

coreutils/whoami.c

@@ -14,7 +14,7 @@
 /* This is a NOFORK applet. Be very careful! */
 
 int whoami_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int whoami_main(int argc, char **argv)
+int whoami_main(int argc, char **argv ATTRIBUTE_UNUSED)
 {
 	if (argc > 1)
 		bb_show_usage();

debianutils/mktemp.c

@@ -12,7 +12,7 @@
 #include "libbb.h"
 
 int mktemp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int mktemp_main(int argc, char **argv)
+int mktemp_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	// -d      Make a directory instead of a file
 	// -q      Fail silently if an error occurs [bbox: ignored]

debianutils/pipe_progress.c

@@ -15,7 +15,7 @@
  * Activity is indicated by a '.' to stderr
  */
 int pipe_progress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int pipe_progress_main(int argc, char **argv)
+int pipe_progress_main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 {
 	RESERVE_CONFIG_BUFFER(buf, PIPE_PROGRESS_SIZE);
 	time_t t = time(NULL);

debianutils/run_parts.c

@@ -79,7 +79,7 @@ static int bb_alphasort(const void *p1, const void *p2)
 	return (option_mask32 & OPT_r) ? -r : r;
 }
 
-static int act(const char *file, struct stat *statbuf, void *args, int depth)
+static int act(const char *file, struct stat *statbuf, void *args ATTRIBUTE_UNUSED, int depth)
 {
 	if (depth == 1)
 		return TRUE;
@@ -113,7 +113,7 @@ static const char runparts_longopts[] ALIGN1 =
 #endif
 
 int run_parts_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int run_parts_main(int argc, char **argv)
+int run_parts_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	const char *umask_p = "22";
 	llist_t *arg_list = NULL;

e2fsprogs/chattr.c

@@ -125,7 +125,7 @@ static void change_attributes(const char *name, struct globals *gp)
 }
 
 int chattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int chattr_main(int argc, char **argv)
+int chattr_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	struct globals g;
 	char *arg;

e2fsprogs/fsck.c

@@ -1128,7 +1128,7 @@ static void signal_cancel(int sig ATTRIBUTE_UNUSED)
 }
 
 int fsck_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int fsck_main(int argc, char **argv)
+int fsck_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int i, status;
 	/*int interactive;*/

e2fsprogs/lsattr.c

@@ -58,7 +58,7 @@ static void list_attributes(const char *name)
 }
 
 static int lsattr_dir_proc(const char *dir_name, struct dirent *de,
-			   void *private)
+			   void *private ATTRIBUTE_UNUSED)
 {
 	struct stat st;
 	char *path;
@@ -96,7 +96,7 @@ static void lsattr_args(const char *name)
 }
 
 int lsattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int lsattr_main(int argc, char **argv)
+int lsattr_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	getopt32(argv, "Radlv");
 	argv += optind;

editors/cmp.c

@@ -43,7 +43,7 @@ static const char opt_chars[] ALIGN1 = "sl";
 #define CMP_OPT_l (1<<1)
 
 int cmp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int cmp_main(int argc, char **argv)
+int cmp_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	FILE *fp1, *fp2, *outfile = stdout;
 	const char *filename1, *filename2 = "-";

editors/diff.c

@@ -1205,7 +1205,7 @@ static void diffdir(char *p1, char *p2)
 
 
 int diff_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int diff_main(int argc, char **argv)
+int diff_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	bool gotstdin = 0;
 	char *U_opt;

editors/patch.c

@@ -78,7 +78,7 @@ static int file_doesnt_exist(const char *filename)
 }
 
 int patch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int patch_main(int argc, char **argv)
+int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int patch_level = -1;
 	char *patch_line;

editors/sed.c

@@ -301,7 +301,7 @@ static int get_address(const char *my_str, int *linenum, regex_t ** regex)
 }
 
 /* Grab a filename.  Whitespace at start is skipped, then goes to EOL. */
-static int parse_file_cmd(sed_cmd_t *sed_cmd, const char *filecmdstr, char **retval)
+static int parse_file_cmd(/*sed_cmd_t *sed_cmd,*/ const char *filecmdstr, char **retval)
 {
 	int start = 0, idx, hack = 0;
 
@@ -375,7 +375,7 @@ static int parse_subst_cmd(sed_cmd_t *sed_cmd, const char *substr)
 		case 'w':
 		{
 			char *temp;
-			idx += parse_file_cmd(sed_cmd, substr+idx, &temp);
+			idx += parse_file_cmd(/*sed_cmd,*/ substr+idx, &temp);
 			break;
 		}
 		/* Ignore case (gnu exension) */
@@ -436,7 +436,7 @@ static const char *parse_cmd_args(sed_cmd_t *sed_cmd, const char *cmdstr)
 	} else if (strchr("rw", sed_cmd->cmd)) {
 		if (sed_cmd->end_line || sed_cmd->end_match)
 			bb_error_msg_and_die("command only uses one address");
-		cmdstr += parse_file_cmd(sed_cmd, cmdstr, &sed_cmd->string);
+		cmdstr += parse_file_cmd(/*sed_cmd,*/ cmdstr, &sed_cmd->string);
 		if (sed_cmd->cmd == 'w') {
 			sed_cmd->sw_file = xfopen(sed_cmd->string, "w");
 			sed_cmd->sw_last_char = '\n';

editors/vi.c

@@ -301,7 +301,7 @@ static void status_line_bold(const char *, ...);
 static void not_implemented(const char *); // display "Not implemented" message
 static int format_edit_status(void);	// format file status on status line
 static void redraw(int);	// force a full screen refresh
-static char* format_line(char*, int);
+static char* format_line(char* /*, int*/);
 static void refresh(int);	// update the terminal from screen[]
 
 static void Indicate_Error(void);       // use flash or beep to indicate error
@@ -2764,7 +2764,7 @@ static void redraw(int full_screen)
 }
 
 //----- Format a text[] line into a buffer ---------------------
-static char* format_line(char *src, int li)
+static char* format_line(char *src /*, int li*/)
 {
 	unsigned char c;
 	int co;
@@ -2848,7 +2848,7 @@ static void refresh(int full_screen)
 		int cs, ce;				// column start & end
 		char *out_buf;
 		// format current text line
-		out_buf = format_line(tp, li);
+		out_buf = format_line(tp /*, li*/);
 
 		// skip to the end of the current text[] line
 		if (tp < end) {

findutils/find.c

@@ -74,7 +74,9 @@ typedef struct {
 #endif
 } action;
 #define ACTS(name, arg...) typedef struct { action a; arg; } action_##name;
-#define ACTF(name)         static int func_##name(const char *fileName, struct stat *statbuf, action_##name* ap)
+#define ACTF(name)         static int func_##name(const char *fileName ATTRIBUTE_UNUSED, \
+                                                  struct stat *statbuf ATTRIBUTE_UNUSED, \
+                                                  action_##name* ap ATTRIBUTE_UNUSED)
                          ACTS(print)
                          ACTS(name,  const char *pattern; bool iname;)
 USE_FEATURE_FIND_PATH(   ACTS(path,  const char *pattern;))

findutils/grep.c

@@ -371,7 +371,7 @@ static void load_regexes_from_file(llist_t *fopt)
 	}
 }
 
-static int file_action_grep(const char *filename, struct stat *statbuf, void* matched, int depth)
+static int file_action_grep(const char *filename, struct stat *statbuf ATTRIBUTE_UNUSED, void* matched, int depth ATTRIBUTE_UNUSED)
 {
 	FILE *file = fopen(filename, "r");
 	if (file == NULL) {

include/busybox.h

@@ -59,7 +59,9 @@ extern const uint8_t applet_install_loc[];
 /* Length of these names has effect on size of libbusybox
  * and "individual" binaries. Keep them short.
  */
-void lbb_prepare(const char *applet, char **argv) MAIN_EXTERNALLY_VISIBLE;
+void lbb_prepare(const char *applet
+	USE_FEATURE_INDIVIDUAL(, char **argv)
+	) MAIN_EXTERNALLY_VISIBLE;
 #if ENABLE_BUILD_LIBBUSYBOX
 #if ENABLE_FEATURE_SHARED_BUSYBOX
 int lbb_main(int argc, char **argv) EXTERNALLY_VISIBLE;

include/libbb.h

@@ -1120,7 +1120,7 @@ enum {
 			| PSSCAN_STIME | PSSCAN_UTIME | PSSCAN_START_TIME
 			| PSSCAN_TTY,
 };
-procps_status_t* alloc_procps_scan(int flags);
+//procps_status_t* alloc_procps_scan(void);
 void free_procps_scan(procps_status_t* sp);
 procps_status_t* procps_scan(procps_status_t* sp, int flags);
 /* Format cmdline (up to col chars) into char buf[col+1] */

ipsvd/tcpudp.c

@@ -143,7 +143,7 @@ static void connection_status(void)
 		bb_error_msg("status %u/%u", cnum, cmax);
 }
 
-static void sig_child_handler(int sig)
+static void sig_child_handler(int sig ATTRIBUTE_UNUSED)
 {
 	int wstat;
 	int pid;
@@ -161,7 +161,7 @@ static void sig_child_handler(int sig)
 }
 
 int tcpudpsvd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int tcpudpsvd_main(int argc, char **argv)
+int tcpudpsvd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char *str_c, *str_C, *str_b, *str_t;
 	char *user;

libbb/appletlib.c

@@ -123,7 +123,8 @@ int find_applet_by_name(const char *name)
 int *const bb_errno __attribute__ ((section (".data")));
 #endif
 
-void lbb_prepare(const char *applet, char **argv)
+void lbb_prepare(const char *applet
+		USE_FEATURE_INDIVIDUAL(, char **argv))
 {
 #ifdef __GLIBC__
 	(*(int **)&bb_errno) = __errno_location();
@@ -662,10 +663,10 @@ void run_applet_and_exit(const char *name, char **argv)
 #if ENABLE_BUILD_LIBBUSYBOX
 int lbb_main(int argc, char **argv)
 #else
-int main(int argc, char **argv)
+int main(int argc ATTRIBUTE_UNUSED, char **argv)
 #endif
 {
-	lbb_prepare("busybox", argv);
+	lbb_prepare("busybox" USE_FEATURE_INDIVIDUAL(, argv));
 
 #if !BB_MMU
 	/* NOMMU re-exec trick sets high-order bit in first byte of name */

libbb/procps.c

@@ -93,7 +93,7 @@ static int read_to_buf(const char *filename, void *buf)
 	return ret;
 }
 
-procps_status_t *alloc_procps_scan(int flags)
+static procps_status_t *alloc_procps_scan(void)
 {
 	unsigned n = getpagesize();
 	procps_status_t* sp = xzalloc(sizeof(procps_status_t));
@@ -175,7 +175,7 @@ procps_status_t *procps_scan(procps_status_t* sp, int flags)
 	struct stat sb;
 
 	if (!sp)
-		sp = alloc_procps_scan(flags);
+		sp = alloc_procps_scan();
 
 	for (;;) {
 		entry = readdir(sp->dir);

libbb/recursive_action.c

@@ -22,8 +22,10 @@
  * is so stinking huge.
  */
 
-static int true_action(const char *fileName, struct stat *statbuf,
-						void* userData, int depth)
+static int true_action(const char *fileName ATTRIBUTE_UNUSED,
+		struct stat *statbuf ATTRIBUTE_UNUSED,
+		void* userData ATTRIBUTE_UNUSED,
+		int depth ATTRIBUTE_UNUSED)
 {
 	return TRUE;
 }

loginutils/adduser.c

@@ -85,7 +85,7 @@ static const char adduser_longopts[] ALIGN1 =
  * can be customized via command-line parameters.
  */
 int adduser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int adduser_main(int argc, char **argv)
+int adduser_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	struct passwd pw;
 	const char *usegroup = NULL;

loginutils/chpasswd.c

@@ -21,7 +21,7 @@ static const char chpasswd_longopts[] ALIGN1 =
 #define OPT_MD5		2
 
 int chpasswd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int chpasswd_main(int argc, char **argv)
+int chpasswd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char *name, *pass;
 	char salt[sizeof("$N$XXXXXXXX")];

loginutils/cryptpw.c

@@ -8,7 +8,7 @@
 #include "libbb.h"
 
 int cryptpw_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int cryptpw_main(int argc, char **argv)
+int cryptpw_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char salt[sizeof("$N$XXXXXXXX")];
 

loginutils/getty.c

@@ -367,7 +367,7 @@ static void auto_baud(char *buf, unsigned size_buf, struct termios *tp)
 }
 
 /* do_prompt - show login prompt, optionally preceded by /etc/issue contents */
-static void do_prompt(struct options *op, struct termios *tp)
+static void do_prompt(struct options *op)
 {
 #ifdef ISSUE
 	print_login_issue(op->issue, op->tty);
@@ -390,7 +390,7 @@ static int all_is_upcase(const char *s)
 /* get_logname - get user name, establish parity, speed, erase, kill, eol;
  * return NULL on BREAK, logname on success */
 static char *get_logname(char *logname, unsigned size_logname,
-		struct options *op, struct chardata *cp, struct termios *tp)
+		struct options *op, struct chardata *cp)
 {
 	char *bp;
 	char c;				/* input character, full eight bits */
@@ -414,7 +414,7 @@ static char *get_logname(char *logname, unsigned size_logname,
 	logname[0] = '\0';
 	while (!logname[0]) {
 		/* Write issue file and prompt, with "parity" bit == 0. */
-		do_prompt(op, tp);
+		do_prompt(op);
 
 		/* Read name, watch for break, parity, erase, kill, end-of-line. */
 		bp = logname;
@@ -621,7 +621,7 @@ static void update_utmp(const char *line, char *fakehost)
 #endif /* CONFIG_FEATURE_UTMP */
 
 int getty_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int getty_main(int argc, char **argv)
+int getty_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int n;
 	char *fakehost = NULL;          /* Fake hostname for ut_host */
@@ -670,7 +670,7 @@ int getty_main(int argc, char **argv)
 
 #ifdef DEBUGGING
 	dbf = xfopen(DEBUGTERM, "w");
-	for (n = 1; n < argc; n++) {
+	for (n = 1; argv[n]; n++) {
 		debug(argv[n]);
 		debug("\n");
 	}
@@ -750,7 +750,7 @@ int getty_main(int argc, char **argv)
 			/* Read the login name. */
 			debug("reading login name\n");
 			logname = get_logname(line_buf, sizeof(line_buf),
-					&options, &chardata, &termios);
+					&options, &chardata);
 			if (logname)
 				break;
 			/* we are here only if options.numspeed > 1 */

loginutils/login.c

@@ -114,7 +114,7 @@ static void write_utent(struct utmp *utptr, const char *username)
 #endif /* !ENABLE_FEATURE_UTMP */
 
 #if ENABLE_FEATURE_NOLOGIN
-static void die_if_nologin_and_non_root(int amroot)
+static void die_if_nologin(void)
 {
 	FILE *fp;
 	int c;
@@ -135,7 +135,7 @@ static void die_if_nologin_and_non_root(int amroot)
 	puts("\r\n[Disconnect bypassed -- root login allowed]\r");
 }
 #else
-static ALWAYS_INLINE void die_if_nologin_and_non_root(int amroot) {}
+static ALWAYS_INLINE void die_if_nologin(void) {}
 #endif
 
 #if ENABLE_FEATURE_SECURETTY && !ENABLE_PAM
@@ -406,7 +406,8 @@ int login_main(int argc, char **argv)
 	}
 
 	alarm(0);
-	die_if_nologin_and_non_root(pw->pw_uid == 0);
+	if (!amroot)
+		die_if_nologin();
 
 	write_utent(&utent, username);
 

loginutils/passwd.c

@@ -70,7 +70,7 @@ static char* new_password(const struct passwd *pw, uid_t myuid, int algo)
 }
 
 int passwd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int passwd_main(int argc, char **argv)
+int passwd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	enum {
 		OPT_algo = 0x1, /* -a - password algorithm */

loginutils/sulogin.c

@@ -15,7 +15,7 @@
 
 
 int sulogin_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int sulogin_main(int argc, char **argv)
+int sulogin_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char *cp;
 	int timeout = 0;

loginutils/vlock.c

@@ -18,21 +18,21 @@
 #include <sys/vt.h>
 #include "libbb.h"
 
-static void release_vt(int signo)
+static void release_vt(int signo ATTRIBUTE_UNUSED)
 {
 	/* If -a, param is 0, which means:
 	 * "no, kernel, we don't allow console switch away from us!" */
 	ioctl(STDIN_FILENO, VT_RELDISP, (unsigned long) !option_mask32);
 }
 
-static void acquire_vt(int signo)
+static void acquire_vt(int signo ATTRIBUTE_UNUSED)
 {
 	/* ACK to kernel that switch to console is successful */
 	ioctl(STDIN_FILENO, VT_RELDISP, VT_ACKACQ);
 }
 
 int vlock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int vlock_main(int argc, char **argv)
+int vlock_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	struct vt_mode vtm;
 	struct termios term;

miscutils/chat.c

@@ -103,7 +103,7 @@ static size_t unescape(char *s, int *nocr)
 
 
 int chat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int chat_main(int argc, char **argv)
+int chat_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 // should we dump device output? to what fd? by default no.
 // this can be controlled later via ECHO {ON|OFF} chat directive

miscutils/crond.c

@@ -158,7 +158,7 @@ static void crondlog(const char *ctl, ...)
 }
 
 int crond_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int crond_main(int ac, char **av)
+int crond_main(int ac ATTRIBUTE_UNUSED, char **av)
 {
 	unsigned opt;
 

miscutils/crontab.c

@@ -88,7 +88,7 @@ static int open_as_user(const struct passwd *pas, const char *file)
 }
 
 int crontab_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int crontab_main(int argc, char **argv)
+int crontab_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	const struct passwd *pas;
 	const char *crontab_dir = CRONTABS;

miscutils/eject.c

@@ -79,7 +79,7 @@ static void eject_cdrom(const int fd, const unsigned long flags,
 }
 
 int eject_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int eject_main(int argc, char **argv)
+int eject_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	unsigned long flags;
 	const char *device;

miscutils/last.c

@@ -27,7 +27,7 @@
 #endif
 
 int last_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int last_main(int argc, char **argv)
+int last_main(int argc, char **argv ATTRIBUTE_UNUSED)
 {
 	struct utmp ut;
 	int n, file = STDIN_FILENO;

miscutils/microcom.c

@@ -41,7 +41,7 @@ static int xset1(int fd, struct termios *tio, const char *device)
 }
 
 int microcom_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int microcom_main(int argc, char **argv)
+int microcom_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int sfd;
 	int nfd;

miscutils/strings.c

@@ -17,7 +17,7 @@
 #define SIZE			8
 
 int strings_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int strings_main(int argc, char **argv)
+int strings_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int n, c, status = EXIT_SUCCESS;
 	unsigned opt;

modutils/insmod.c

@@ -651,7 +651,7 @@ static struct obj_symbol *arch_new_symbol(void);
 
 static enum obj_reloc arch_apply_relocation(struct obj_file *f,
 				      struct obj_section *targsec,
-				      struct obj_section *symsec,
+				      /*struct obj_section *symsec,*/
 				      struct obj_symbol *sym,
 				      ElfW(RelM) *rel, ElfW(Addr) value);
 
@@ -792,8 +792,9 @@ static char *m_fullName;
 /*======================================================================*/
 
 
-static int check_module_name_match(const char *filename, struct stat *statbuf,
-				void *userdata, int depth)
+static int check_module_name_match(const char *filename,
+		struct stat *statbuf ATTRIBUTE_UNUSED,
+		void *userdata, int depth ATTRIBUTE_UNUSED)
 {
 	char *fullname = (char *) userdata;
 	char *tmp;
@@ -835,7 +836,7 @@ static struct obj_symbol *arch_new_symbol(void)
 static enum obj_reloc
 arch_apply_relocation(struct obj_file *f,
 				struct obj_section *targsec,
-				struct obj_section *symsec,
+				/*struct obj_section *symsec,*/
 				struct obj_symbol *sym,
 				ElfW(RelM) *rel, ElfW(Addr) v)
 {
@@ -1751,7 +1752,7 @@ static int arch_list_add(ElfW(RelM) *rel, struct arch_list_entry **list,
 
 #if defined(USE_SINGLE)
 
-static int arch_single_init(ElfW(RelM) *rel, struct arch_single_entry *single,
+static int arch_single_init(/*ElfW(RelM) *rel,*/ struct arch_single_entry *single,
 			     int offset, int size)
 {
 	if (single->allocated == 0) {
@@ -1899,7 +1900,7 @@ static void arch_create_got(struct obj_file *f)
 #if defined(USE_GOT_ENTRIES)
 			if (got_allocate) {
 				got_offset += arch_single_init(
-						rel, &intsym->gotent,
+						/*rel,*/ &intsym->gotent,
 						got_offset, GOT_ENTRY_SIZE);
 
 				got_needed = 1;
@@ -1913,7 +1914,7 @@ static void arch_create_got(struct obj_file *f)
 						plt_offset, PLT_ENTRY_SIZE);
 #else
 				plt_offset += arch_single_init(
-						rel, &intsym->pltent,
+						/*rel,*/ &intsym->pltent,
 						plt_offset, PLT_ENTRY_SIZE);
 #endif
 				plt_needed = 1;
@@ -3220,7 +3221,7 @@ static int obj_relocate(struct obj_file *f, ElfW(Addr) base)
 
 			/* Do it! */
 			switch (arch_apply_relocation
-					(f, targsec, symsec, intsym, rel, value)
+					(f, targsec, /*symsec,*/ intsym, rel, value)
 			) {
 			case obj_reloc_ok:
 				break;
@@ -3299,7 +3300,7 @@ static int obj_create_image(struct obj_file *f, char *image)
 
 /*======================================================================*/
 
-static struct obj_file *obj_load(FILE * fp, int loadprogbits)
+static struct obj_file *obj_load(FILE * fp, int loadprogbits ATTRIBUTE_UNUSED)
 {
 	struct obj_file *f;
 	ElfW(Shdr) * section_headers;
@@ -4193,9 +4194,9 @@ static const char *moderror(int err)
 
 #if !ENABLE_FEATURE_2_4_MODULES
 int insmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int insmod_main(int argc, char **argv)
+int insmod_main(int argc ATTRIBUTE_UNUSED, char **argv)
 #else
-static int insmod_ng_main(int argc, char **argv)
+static int insmod_ng_main(int argc ATTRIBUTE_UNUSED, char **argv)
 #endif
 {
 	long ret;

modutils/lsmod.c

@@ -141,7 +141,7 @@ int lsmod_main(int argc, char **argv)
 #else /* CONFIG_FEATURE_QUERY_MODULE_INTERFACE */
 
 int lsmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int lsmod_main(int argc, char **argv)
+int lsmod_main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED)
 {
 	FILE *file = xfopen("/proc/modules", "r");
 

networking/arp.c

@@ -435,7 +435,7 @@ static int arp_show(char *name)
 }
 
 int arp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int arp_main(int argc, char **argv)
+int arp_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char *hw_type;
 	char *protocol;

networking/arping.c

@@ -245,7 +245,7 @@ static bool recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
 }
 
 int arping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int arping_main(int argc, char **argv)
+int arping_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	const char *device = "eth0";
 	char *source = NULL;

networking/dnsd.c

@@ -321,15 +321,15 @@ static int process_packet(uint8_t * buf)
 /*
  * Exit on signal
  */
-static void interrupt(int x)
+static void interrupt(int sig)
 {
 	/* unlink("/var/run/dnsd.lock"); */
 	bb_error_msg("interrupt, exiting\n");
-	exit(2);
+	kill_myself_with_sig(sig);
 }
 
 int dnsd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int dnsd_main(int argc, char **argv)
+int dnsd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	const char *listen_interface = "0.0.0.0";
 	char *sttl, *sport;
@@ -387,6 +387,9 @@ int dnsd_main(int argc, char **argv)
 // Or else we can exhibit usual UDP ugliness:
 // [ip1.multihomed.ip2] <=  query to ip1  <= peer
 // [ip1.multihomed.ip2] => reply from ip2 => peer (confused)
+
+// TODO: recv_from_to
+
 		r = recvfrom(udps, buf, sizeof(buf), 0, &lsa->u.sa, &fromlen);
 		if (OPT_verbose)
 			bb_info_msg("Got UDP packet");

networking/ftpgetput.c

@@ -297,7 +297,7 @@ static const char ftpgetput_longopts[] ALIGN1 =
 #endif
 
 int ftpgetput_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ftpgetput_main(int argc, char **argv)
+int ftpgetput_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	/* content-length of the file */
 	unsigned opt;

networking/httpd.c

@@ -1754,7 +1754,7 @@ static Htaccess_Proxy *find_proxy_entry(const char *url)
  * Handle timeouts
  */
 static void exit_on_signal(int sig) ATTRIBUTE_NORETURN;
-static void exit_on_signal(int sig)
+static void exit_on_signal(int sig ATTRIBUTE_UNUSED)
 {
 	send_headers_and_exit(HTTP_REQUEST_TIMEOUT);
 }
@@ -2275,7 +2275,7 @@ enum {
 
 
 int httpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int httpd_main(int argc, char **argv)
+int httpd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int server_socket = server_socket; /* for gcc */
 	unsigned opt;

networking/ifenslave.c

@@ -150,7 +150,7 @@ static int release(char *master_ifname, char *slave_ifname);
 
 
 int ifenslave_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ifenslave_main(int argc, char **argv)
+int ifenslave_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char *master_ifname, *slave_ifname;
 	int rv;

networking/ifupdown.c

@@ -530,7 +530,7 @@ static int dhcp_down(struct interface_defn_t *ifd, execfn *exec)
 #endif
 }
 
-static int manual_up_down(struct interface_defn_t *ifd, execfn *exec)
+static int manual_up_down(struct interface_defn_t *ifd ATTRIBUTE_UNUSED, execfn *exec ATTRIBUTE_UNUSED)
 {
 	return 1;
 }

networking/inetd.c

@@ -1128,7 +1128,7 @@ static void clean_up_and_exit(int sig ATTRIBUTE_UNUSED)
 }
 
 int inetd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int inetd_main(int argc, char **argv)
+int inetd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	struct sigaction sa, saved_pipe_handler;
 	servtab_t *sep, *sep2;
@@ -1492,7 +1492,7 @@ static void init_ring(void)
 }
 /* Character generator. MMU arches only. */
 /* ARGSUSED */
-static void chargen_stream(int s, servtab_t *sep)
+static void chargen_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
 {
 	char *rs;
 	int len;

networking/interface.c

@@ -237,7 +237,7 @@ static char *UNSPEC_print(unsigned char *ptr)
 }
 
 /* Display an UNSPEC socket address. */
-static const char *UNSPEC_sprint(struct sockaddr *sap, int numeric)
+static const char *UNSPEC_sprint(struct sockaddr *sap, int numeric ATTRIBUTE_UNUSED)
 {
 	if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
 		return "[NONE SET]";

networking/ip.c

@@ -37,35 +37,35 @@ static int ip_do(int (*ip_func)(char **argv), char **argv)
 
 #if ENABLE_FEATURE_IP_ADDRESS
 int ipaddr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ipaddr_main(int argc, char **argv)
+int ipaddr_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
     return ip_do(do_ipaddr, argv);
 }
 #endif
 #if ENABLE_FEATURE_IP_LINK
 int iplink_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int iplink_main(int argc, char **argv)
+int iplink_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
     return ip_do(do_iplink, argv);
 }
 #endif
 #if ENABLE_FEATURE_IP_ROUTE
 int iproute_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int iproute_main(int argc, char **argv)
+int iproute_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
     return ip_do(do_iproute, argv);
 }
 #endif
 #if ENABLE_FEATURE_IP_RULE
 int iprule_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int iprule_main(int argc, char **argv)
+int iprule_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
     return ip_do(do_iprule, argv);
 }
 #endif
 #if ENABLE_FEATURE_IP_TUNNEL
 int iptunnel_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int iptunnel_main(int argc, char **argv)
+int iptunnel_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
     return ip_do(do_iptunnel, argv);
 }
@@ -73,7 +73,7 @@ int iptunnel_main(int argc, char **argv)
 
 
 int ip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ip_main(int argc, char **argv)
+int ip_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	static const char keywords[] ALIGN1 =
 		USE_FEATURE_IP_ADDRESS("address\0")

networking/isrv_identd.c

@@ -76,7 +76,7 @@ static int do_rd(int fd, void **paramp)
 	return retval;
 }
 
-static int do_timeout(void **paramp)
+static int do_timeout(void **paramp ATTRIBUTE_UNUSED)
 {
 	return 1; /* terminate session */
 }
@@ -93,7 +93,7 @@ static void inetd_mode(void)
 }
 
 int fakeidentd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int fakeidentd_main(int argc, char **argv)
+int fakeidentd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	enum {
 		OPT_foreground = 0x1,

networking/libiproute/ll_map.c

@@ -39,7 +39,9 @@ static struct idxmap *find_by_index(int idx)
 	return NULL;
 }
 
-int ll_remember_index(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
+int ll_remember_index(struct sockaddr_nl *who ATTRIBUTE_UNUSED,
+		struct nlmsghdr *n,
+		void *arg ATTRIBUTE_UNUSED)
 {
 	int h;
 	struct ifinfomsg *ifi = NLMSG_DATA(n);

networking/nc_bloaty.c

@@ -177,7 +177,7 @@ static void unarm(void)
 }
 
 /* timeout and other signal handling cruft */
-static void tmtravel(int sig)
+static void tmtravel(int sig ATTRIBUTE_UNUSED)
 {
 	unarm();
 	longjmp(jbuf, 1);

networking/netstat.c

@@ -486,7 +486,7 @@ static void do_info(const char *file, const char *name, int (*proc)(int, char *)
 }
 
 int netstat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int netstat_main(int argc, char **argv)
+int netstat_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	const char *net_conn_line_header = PRINT_NET_CONN_HEADER;
 	unsigned opt;

networking/ping.c

@@ -174,7 +174,7 @@ static void ping6(len_and_sockaddr *lsa)
 #endif
 
 int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ping_main(int argc, char **argv)
+int ping_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	len_and_sockaddr *lsa;
 #if ENABLE_PING6
@@ -495,7 +495,7 @@ static void unpack4(char *buf, int sz, struct sockaddr_in *from)
 	}
 }
 #if ENABLE_PING6
-static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit)
+static void unpack6(char *packet, int sz, /*struct sockaddr_in6 *from,*/ int hoplimit)
 {
 	struct icmp6_hdr *icmppkt;
 	char buf[INET6_ADDRSTRLEN];
@@ -658,7 +658,7 @@ static void ping6(len_and_sockaddr *lsa)
 				hoplimit = *(int*)CMSG_DATA(mp);
 			}
 		}
-		unpack6(packet, c, &from, hoplimit);
+		unpack6(packet, c, /*&from,*/ hoplimit);
 		if (pingcount > 0 && nreceived >= pingcount)
 			break;
 	}
@@ -683,7 +683,7 @@ static void ping(len_and_sockaddr *lsa)
 }
 
 int ping_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ping_main(int argc, char **argv)
+int ping_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	len_and_sockaddr *lsa;
 	char *opt_c, *opt_s;

networking/pscan.c

@@ -31,7 +31,7 @@ static const char *port_name(unsigned port)
 #define MONOTONIC_US() ((unsigned)monotonic_us())
 
 int pscan_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int pscan_main(int argc, char **argv)
+int pscan_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	const char *opt_max_port = "1024";      /* -P: default max port */
 	const char *opt_min_port = "1";         /* -p: default min port */

networking/route.c

@@ -539,7 +539,7 @@ void bb_displayroutes(int noresolve, int netstatfmt)
 
 #if ENABLE_FEATURE_IPV6
 
-static void INET6_displayroutes(int noresolve)
+static void INET6_displayroutes(void)
 {
 	char addr6[128], *naddr6;
 	/* In addr6x, we store both 40-byte ':'-delimited ipv6 addresses.
@@ -642,7 +642,7 @@ static const char tbl_verb[] ALIGN1 =
 ;
 
 int route_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int route_main(int argc, char **argv)
+int route_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	unsigned opt;
 	int what;
@@ -675,7 +675,7 @@ int route_main(int argc, char **argv)
 		int noresolve = (opt & ROUTE_OPT_n) ? 0x0fff : 0;
 #if ENABLE_FEATURE_IPV6
 		if (opt & ROUTE_OPT_INET6)
-			INET6_displayroutes(noresolve);
+			INET6_displayroutes();
 		else
 #endif
 			bb_displayroutes(noresolve, opt & ROUTE_OPT_e);

networking/sendmail.c

@@ -252,7 +252,7 @@ static void pop3_message(const char *filename)
 #endif
 
 int sendgetmail_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int sendgetmail_main(int argc, char **argv)
+int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	llist_t *opt_recipients = NULL;
 

networking/slattach.c

@@ -114,13 +114,13 @@ static void set_state(struct termios *state, int encap)
 	}
 }
 
-static void sig_handler(int signo)
+static void sig_handler(int signo ATTRIBUTE_UNUSED)
 {
 	restore_state_and_exit(0);
 }
 
 int slattach_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int slattach_main(int argc, char **argv)
+int slattach_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	/* Line discipline code table */
 	static const char proto_names[] ALIGN1 =

networking/telnetd.c

@@ -338,7 +338,7 @@ free_session(struct tsession *ts)
 
 #endif
 
-static void handle_sigchld(int sig)
+static void handle_sigchld(int sig ATTRIBUTE_UNUSED)
 {
 	pid_t pid;
 	struct tsession *ts;
@@ -360,7 +360,7 @@ static void handle_sigchld(int sig)
 }
 
 int telnetd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int telnetd_main(int argc, char **argv)
+int telnetd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	fd_set rdfdset, wrfdset;
 	unsigned opt;

networking/tftp.c

@@ -392,7 +392,7 @@ static int tftp( USE_GETPUT(const int cmd,)
 }
 
 int tftp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int tftp_main(int argc, char **argv)
+int tftp_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	len_and_sockaddr *peer_lsa;
 	const char *localfile = NULL;

networking/udhcp/dhcpc.c

@@ -129,7 +129,7 @@ static uint8_t* alloc_dhcp_option(int code, const char *str, int extra)
 
 
 int udhcpc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int udhcpc_main(int argc, char **argv)
+int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	uint8_t *temp, *message;
 	char *str_c, *str_V, *str_h, *str_F, *str_r, *str_T, *str_A, *str_t;

networking/udhcp/dhcpd.c

@@ -23,7 +23,7 @@ struct dhcpOfferedAddr *leases;
 
 
 int udhcpd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int udhcpd_main(int argc, char **argv)
+int udhcpd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	fd_set rfds;
 	struct timeval tv;

networking/udhcp/dumpleases.c

@@ -8,7 +8,7 @@
 #include "dhcpd.h"
 
 int dumpleases_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int dumpleases_main(int argc, char **argv)
+int dumpleases_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int fd;
 	int i;