*: shrink: use Vladimir's "o+" specifier instead of xatou(opt_param)

function                                             old     new   delta
getopt32                                            1370    1385     +15
sulogin_main                                         490     494      +4
realpath_main                                         84      86      +2
sleep_main                                            76      77      +1
mt_main                                              256     257      +1
printenv_main                                         75      74      -1
fdformat_main                                        546     545      -1
usleep_main                                           44      42      -2
setlogcons_main                                       77      75      -2
ed_main                                             2654    2649      -5
deallocvt_main                                        69      64      -5
addgroup_main                                        373     368      -5
mkfs_minix_main                                     2989    2982      -7
tail_main                                           1221    1213      -8
sv_main                                             1254    1241     -13
du_main                                              348     328     -20
tftp_main                                            325     302     -23
split_main                                           581     558     -23
nc_main                                             1000     977     -23
diff_main                                            891     868     -23
arping_main                                         1797    1770     -27
ls_main                                              893     847     -46
od_main                                             2797    2750     -47
readprofile_main                                    1944    1895     -49
tcpudpsvd_main                                      1973    1922     -51
udhcpc_main                                         2590    2513     -77
grep_main                                            824     722    -102
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/22 up/down: 23/-560)         Total: -537 bytes
   text    data     bss     dec     hex filename
 796973     658    7428  805059   c48c3 busybox_old
 796479     662    7420  804561   c46d1 busybox_unstripped

34 files changed, 172 insertions, 209 deletions

diff --git a/console-tools/deallocvt.c b/console-tools/deallocvt.c
index 117224560..1200cae1d 100644
--- a/console-tools/deallocvt.c
+++ b/console-tools/deallocvt.c
@@ -16,19 +16,15 @@
 enum { VT_DISALLOCATE = 0x5608 }; /* free memory associated to vt */
 
 int deallocvt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int deallocvt_main(int argc, char **argv)
+int deallocvt_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	/* num = 0 deallocate all unused consoles */
 	int num = 0;
 
-	switch (argc) {
-	case 2:
+	if (argv[1]) {
+		if (argv[2])
+			bb_show_usage();
 		num = xatou_range(argv[1], 1, 63);
-		/* Fallthrough */
-	case 1:
-		break;
-	default:
-		bb_show_usage();
 	}
 
 	/* double cast suppresses "cast to ptr from int of different size" */
diff --git a/console-tools/openvt.c b/console-tools/openvt.c
index ff169530d..39b985995 100644
--- a/console-tools/openvt.c
+++ b/console-tools/openvt.c
@@ -27,9 +27,10 @@ int openvt_main(int argc, char **argv)
 	/* grab new one */
 	close(0);
 	xopen(vtname, O_RDWR);
-	dup2(0, STDOUT_FILENO);
-	dup2(0, STDERR_FILENO);
+	xdup2(0, STDOUT_FILENO);
+	xdup2(0, STDERR_FILENO);
 
-	BB_EXECVP(argv[2], &argv[2]);
+	argv += 2;
+	BB_EXECVP(argv[0], argv);
 	_exit(1);
 }
diff --git a/console-tools/setkeycodes.c b/console-tools/setkeycodes.c
index ba3d2e44e..e9a050862 100644
--- a/console-tools/setkeycodes.c
+++ b/console-tools/setkeycodes.c
@@ -14,7 +14,7 @@
 
 /* From <linux/kd.h> */
 struct kbkeycode {
-	unsigned int scancode, keycode;
+	unsigned scancode, keycode;
 };
 enum {
 	KDSETKEYCODE = 0x4B4D  /* write kernel keycode table entry */
@@ -33,7 +33,7 @@ int setkeycodes_main(int argc, char **argv)
 	fd = get_console_fd();
 
 	while (argc > 2) {
-		a.keycode = xatoul_range(argv[2], 0, 127);
+		a.keycode = xatou_range(argv[2], 0, 127);
 		a.scancode = sc = xstrtoul_range(argv[1], 16, 0, 255);
 		if (a.scancode > 127) {
 			a.scancode -= 0xe000;
diff --git a/console-tools/setlogcons.c b/console-tools/setlogcons.c
index 0f6491c72..b312fa76e 100644
--- a/console-tools/setlogcons.c
+++ b/console-tools/setlogcons.c
@@ -12,7 +12,7 @@
 #include "libbb.h"
 
 int setlogcons_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int setlogcons_main(int argc, char **argv)
+int setlogcons_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	struct {
 		char fn;
@@ -22,8 +22,8 @@ int setlogcons_main(int argc, char **argv)
 	arg.fn = 11;    /* redirect kernel messages */
 	arg.subarg = 0; /* to specified console (current as default) */
 
-	if (argc == 2)
-		arg.subarg = xatoul_range(argv[1], 0, 63);
+	if (argv[1])
+		arg.subarg = xatou_range(argv[1], 0, 63);
 
 	xioctl(xopen(VC_1, O_RDONLY), TIOCLINUX, &arg);
 
diff --git a/coreutils/du.c b/coreutils/du.c
index 7495f7a7b..b469824ea 100644
--- a/coreutils/du.c
+++ b/coreutils/du.c
@@ -146,7 +146,6 @@ int du_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	unsigned long total;
 	int slink_depth_save;
 	bool print_final_total;
-	char *smax_print_depth;
 	unsigned opt;
 
 #if ENABLE_FEATURE_HUMAN_READABLE
@@ -168,8 +167,8 @@ int du_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	 * ignore -a.  This is consistent with -s being equivalent to -d 0.
 	 */
 #if ENABLE_FEATURE_HUMAN_READABLE
-	opt_complementary = "h-km:k-hm:m-hk:H-L:L-H:s-d:d-s";
-	opt = getopt32(argv, "aHkLsx" "d:" "lc" "hm", &smax_print_depth);
+	opt_complementary = "h-km:k-hm:m-hk:H-L:L-H:s-d:d-s:d+";
+	opt = getopt32(argv, "aHkLsx" "d:" "lc" "hm", &G.max_print_depth);
 	argv += optind;
 	if (opt & (1 << 9)) {
 		/* -h opt */
@@ -184,8 +183,8 @@ int du_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		G.disp_hr = 1024;
 	}
 #else
-	opt_complementary = "H-L:L-H:s-d:d-s";
-	opt = getopt32(argv, "aHkLsx" "d:" "lc", &smax_print_depth);
+	opt_complementary = "H-L:L-H:s-d:d-s:d+";
+	opt = getopt32(argv, "aHkLsx" "d:" "lc", &G.max_print_depth);
 	argv += optind;
 #if !ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
 	if (opt & (1 << 2)) {
@@ -211,10 +210,6 @@ int du_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		G.max_print_depth = 0;
 	}
 	G.one_file_system = opt & (1 << 5); /* -x opt */
-	if (opt & (1 << 6)) {
-		/* -d opt */
-		G.max_print_depth = xatoi_u(smax_print_depth);
-	}
 	if (opt & (1 << 7)) {
 		/* -l opt */
 		G.count_hardlinks = MAXINT(nlink_t);
diff --git a/coreutils/ls.c b/coreutils/ls.c
index dbf1c5ba6..9e5c6dee9 100644
--- a/coreutils/ls.c
+++ b/coreutils/ls.c
@@ -799,8 +799,6 @@ int ls_main(int argc, char **argv)
 	int ac;
 	int i;
 	char **av;
-	USE_FEATURE_AUTOWIDTH(char *tabstops_str = NULL;)
-	USE_FEATURE_AUTOWIDTH(char *terminal_width_str = NULL;)
 	USE_FEATURE_LS_COLOR(char *color_opt;)
 
 #if ENABLE_FEATURE_LS_TIMESTAMPS
@@ -820,12 +818,9 @@ int ls_main(int argc, char **argv)
 	/* process options */
 	USE_FEATURE_LS_COLOR(applet_long_options = ls_color_opt;)
 #if ENABLE_FEATURE_AUTOWIDTH
-	opt = getopt32(argv, ls_options, &tabstops_str, &terminal_width_str
+	opt_complementary = "T+:w+"; /* -T N, -w N */
+	opt = getopt32(argv, ls_options, &tabstops, &terminal_width
 				USE_FEATURE_LS_COLOR(, &color_opt));
-	if (tabstops_str)
-		tabstops = xatou(tabstops_str);
-	if (terminal_width_str)
-		terminal_width = xatou(terminal_width_str);
 #else
 	opt = getopt32(argv, ls_options USE_FEATURE_LS_COLOR(, &color_opt));
 #endif
diff --git a/coreutils/od_bloaty.c b/coreutils/od_bloaty.c
index a083114c9..4526f0ede 100644
--- a/coreutils/od_bloaty.c
+++ b/coreutils/od_bloaty.c
@@ -188,7 +188,7 @@ static off_t pseudo_offset;
    a multiple of the least common multiple of the sizes associated with
    the specified output types.  It should be as large as possible, but
    no larger than 16 -- unless specified with the -w option.  */
-static size_t bytes_per_block;
+static unsigned bytes_per_block = 32; /* have to use unsigned, not size_t */
 
 /* A NULL-terminated list of the file-arguments from the command line.  */
 static const char *const *file_list;
@@ -1218,7 +1218,6 @@ int od_main(int argc, char **argv)
 		;
 #endif
 	char *str_A, *str_N, *str_j, *str_S;
-	char *str_w = NULL;
 	llist_t *lst_t = NULL;
 	unsigned opt;
 	int l_c_m;
@@ -1239,7 +1238,7 @@ int od_main(int argc, char **argv)
 	/* flag_dump_strings = 0; - already is */
 
 	/* Parse command line */
-	opt_complementary = "t::"; // list
+	opt_complementary = "w+:t::"; /* -w N, -t is a list */
 #if ENABLE_GETOPT_LONG
 	applet_long_options = od_longopts;
 #endif
@@ -1248,7 +1247,7 @@ int od_main(int argc, char **argv)
 		// -S was -s and also had optional parameter
 		// but in coreutils 6.3 it was renamed and now has
 		// _mandatory_ parameter
-		&str_A, &str_N, &str_j, &lst_t, &str_S, &str_w);
+		&str_A, &str_N, &str_j, &lst_t, &str_S, &bytes_per_block);
 	argc -= optind;
 	argv += optind;
 	if (opt & OPT_A) {
@@ -1404,9 +1403,6 @@ int od_main(int argc, char **argv)
 	l_c_m = get_lcm();
 
 	if (opt & OPT_w) { /* -w: width */
-		bytes_per_block = 32;
-		if (str_w)
-			bytes_per_block = xatou(str_w);
 		if (!bytes_per_block || bytes_per_block % l_c_m != 0) {
 			bb_error_msg("warning: invalid width %u; using %d instead",
 					(unsigned)bytes_per_block, l_c_m);
diff --git a/coreutils/printenv.c b/coreutils/printenv.c
index 06d68d0ef..31d76d712 100644
--- a/coreutils/printenv.c
+++ b/coreutils/printenv.c
@@ -11,10 +11,10 @@
 #include "libbb.h"
 
 int printenv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int printenv_main(int argc, char **argv)
+int printenv_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	/* no variables specified, show whole env */
-	if (argc == 1) {
+	if (!argv[1]) {
 		int e = 0;
 		while (environ[e])
 			puts(environ[e++]);
diff --git a/coreutils/realpath.c b/coreutils/realpath.c
index bcb73a8dc..6766524a7 100644
--- a/coreutils/realpath.c
+++ b/coreutils/realpath.c
@@ -13,7 +13,7 @@
 #include "libbb.h"
 
 int realpath_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int realpath_main(int argc, char **argv)
+int realpath_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int retval = EXIT_SUCCESS;
 
@@ -25,19 +25,18 @@ int realpath_main(int argc, char **argv)
 # define resolved_path_MUST_FREE 0
 #endif
 
-	if (--argc == 0) {
+	if (!*++argv) {
 		bb_show_usage();
 	}
 
 	do {
-		argv++;
 		if (realpath(*argv, resolved_path) != NULL) {
 			puts(resolved_path);
 		} else {
 			retval = EXIT_FAILURE;
 			bb_simple_perror_msg(*argv);
 		}
-	} while (--argc);
+	} while (*++argv);
 
 #if ENABLE_FEATURE_CLEAN_UP && resolved_path_MUST_FREE
 	RELEASE_CONFIG_BUFFER(resolved_path);
diff --git a/coreutils/sleep.c b/coreutils/sleep.c
index 6890e35c1..78f9a8ebf 100644
--- a/coreutils/sleep.c
+++ b/coreutils/sleep.c
@@ -34,17 +34,16 @@ static const struct suffix_mult sfx[] = {
 #endif
 
 int sleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int sleep_main(int argc, char **argv)
+int sleep_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	unsigned duration;
 
-#if ENABLE_FEATURE_FANCY_SLEEP
-
-	if (argc < 2) {
+	++argv;
+	if (!*argv)
 		bb_show_usage();
-	}
 
-	++argv;
+#if ENABLE_FEATURE_FANCY_SLEEP
+
 	duration = 0;
 	do {
 		duration += xatoul_range_sfx(*argv, 0, UINT_MAX-duration, sfx);
@@ -52,11 +51,7 @@ int sleep_main(int argc, char **argv)
 
 #else  /* FEATURE_FANCY_SLEEP */
 
-	if (argc != 2) {
-		bb_show_usage();
-	}
-
-	duration = xatou(argv[1]);
+	duration = xatou(*argv);
 
 #endif /* FEATURE_FANCY_SLEEP */
 
diff --git a/coreutils/split.c b/coreutils/split.c
index cf26a9322..2306789f0 100644
--- a/coreutils/split.c
+++ b/coreutils/split.c
@@ -68,15 +68,13 @@ int split_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	ssize_t bytes_read, to_write;
 	char *src;
 
-	opt_complementary = "?2";
-	opt = getopt32(argv, "l:b:a:", &count_p, &count_p, &sfx);
+	opt_complementary = "?2:a+"; /* max 2 args; -a N */
+	opt = getopt32(argv, "l:b:a:", &count_p, &count_p, &suffix_len);
 
 	if (opt & SPLIT_OPT_l)
-		cnt = xatoul(count_p);
-	if (opt & SPLIT_OPT_b)
-		cnt = xatoul_sfx(count_p, split_suffices);
-	if (opt & SPLIT_OPT_a)
-		suffix_len = xatou(sfx);
+		cnt = XATOOFF(count_p);
+	if (opt & SPLIT_OPT_b) // FIXME: also needs XATOOFF
+		cnt = xatoull_sfx(count_p, split_suffices);
 	sfx = "x";
 
 	argv += optind;
diff --git a/coreutils/tail.c b/coreutils/tail.c
index 52aa8f69e..35b25a416 100644
--- a/coreutils/tail.c
+++ b/coreutils/tail.c
@@ -87,7 +87,6 @@ int tail_main(int argc, char **argv)
 	bool from_top;
 	int header_threshhold = 1;
 	const char *str_c, *str_n;
-	USE_FEATURE_FANCY_TAIL(const char *str_s;)
 
 	char *tailbuf;
 	size_t tailbufsize;
@@ -110,8 +109,9 @@ int tail_main(int argc, char **argv)
 	}
 #endif
 
+	USE_FEATURE_FANCY_TAIL(opt_complementary = "s+";) /* -s N */
 	opt = getopt32(argv, "fc:n:" USE_FEATURE_FANCY_TAIL("qs:v"),
-			&str_c, &str_n USE_FEATURE_FANCY_TAIL(,&str_s));
+			&str_c, &str_n USE_FEATURE_FANCY_TAIL(,&sleep_period));
 #define FOLLOW (opt & 0x1)
 #define COUNT_BYTES (opt & 0x2)
 	//if (opt & 0x1) // -f
@@ -119,7 +119,6 @@ int tail_main(int argc, char **argv)
 	if (opt & 0x4) count = eat_num(str_n); // -n
 #if ENABLE_FEATURE_FANCY_TAIL
 	if (opt & 0x8) header_threshhold = INT_MAX; // -q
-	if (opt & 0x10) sleep_period = xatou(str_s); // -s
 	if (opt & 0x20) header_threshhold = 0; // -v
 #endif
 	argc -= optind;
diff --git a/coreutils/usleep.c b/coreutils/usleep.c
index 1c9022325..d34880d3a 100644
--- a/coreutils/usleep.c
+++ b/coreutils/usleep.c
@@ -14,9 +14,9 @@
 /* This is a NOFORK applet. Be very careful! */
 
 int usleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int usleep_main(int argc, char **argv)
+int usleep_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
-	if (argc != 2) {
+	if (!argv[1]) {
 		bb_show_usage();
 	}
 
diff --git a/editors/diff.c b/editors/diff.c
index f9e82ba02..486077847 100644
--- a/editors/diff.c
+++ b/editors/diff.c
@@ -1208,17 +1208,16 @@ int diff_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int diff_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	bool gotstdin = 0;
-	char *U_opt;
 	char *f1, *f2;
 	llist_t *L_arg = NULL;
 
 	INIT_G();
 
-	/* exactly 2 params; collect multiple -L <label> */
-	opt_complementary = "=2:L::";
+	/* exactly 2 params; collect multiple -L <label>; -U N */
+	opt_complementary = "=2:L::U+";
 	getopt32(argv, "abdiL:NqrsS:tTU:wu"
 			"p" /* ignored (for compatibility) */,
-			&L_arg, &start, &U_opt);
+			&L_arg, &start, &context);
 	/*argc -= optind;*/
 	argv += optind;
 	while (L_arg) {
@@ -1233,8 +1232,6 @@ int diff_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		/* we leak L_arg here... */
 		L_arg = L_arg->link;
 	}
-	if (option_mask32 & FLAG_U)
-		context = xatoi_u(U_opt);
 
 	/*
 	 * Do sanity checks, fill in stb1 and stb2 and call the appropriate
diff --git a/editors/ed.c b/editors/ed.c
index 15f0147be..9606cfdde 100644
--- a/editors/ed.c
+++ b/editors/ed.c
@@ -89,7 +89,7 @@ static char *skip_blank(const char *cp)
 
 
 int ed_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ed_main(int argc, char **argv)
+int ed_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	INIT_G();
 
@@ -99,7 +99,7 @@ int ed_main(int argc, char **argv)
 	lines.next = &lines;
 	lines.prev = &lines;
 
-	if (argc > 1) {
+	if (argv[1]) {
 		fileName = xstrdup(argv[1]);
 		if (!readLines(fileName, 1)) {
 			return EXIT_SUCCESS;
diff --git a/findutils/grep.c b/findutils/grep.c
index c4cfcb852..259026ee5 100644
--- a/findutils/grep.c
+++ b/findutils/grep.c
@@ -7,7 +7,7 @@
  *
  * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
  */
-/* BB_AUDIT SUSv3 defects - unsupported option -x.  */
+/* BB_AUDIT SUSv3 defects - unsupported option -x "match whole line only". */
 /* BB_AUDIT GNU defects - always acts as -a.  */
 /* http://www.opengroup.org/onlinepubs/007904975/utilities/grep.html */
 /*
@@ -299,7 +299,7 @@ static int grep_file(FILE *file)
 				free(before_buf[curpos]);
 				before_buf[curpos] = line;
 				curpos = (curpos + 1) % lines_before;
-				/* avoid free(line) - we took line */
+				/* avoid free(line) - we took the line */
 				line = NULL;
 			}
 		}
@@ -371,7 +371,10 @@ static void load_regexes_from_file(llist_t *fopt)
 	}
 }
 
-static int file_action_grep(const char *filename, struct stat *statbuf ATTRIBUTE_UNUSED, void* matched, int depth ATTRIBUTE_UNUSED)
+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) {
@@ -405,35 +408,28 @@ int grep_main(int argc, char **argv)
 {
 	FILE *file;
 	int matched;
-	char *mopt;
 	llist_t *fopt = NULL;
 
 	/* do normal option parsing */
 #if ENABLE_FEATURE_GREP_CONTEXT
-	char *slines_after;
-	char *slines_before;
-	char *Copt;
+	int Copt;
 
-	opt_complementary = "H-h:e::f::C-AB";
+	/* -H unsets -h; -C unsets -A,-B; -e,-f are lists;
+	 * -m,-A,-B,-C have numeric param */
+	opt_complementary = "H-h:C-AB:e::f::m+:A+:B+:C+";
 	getopt32(argv,
 		OPTSTR_GREP,
-		&pattern_head, &fopt, &mopt,
-		&slines_after, &slines_before, &Copt);
+		&pattern_head, &fopt, &max_matches,
+		&lines_after, &lines_before, &Copt);
 
 	if (option_mask32 & OPT_C) {
 		/* -C unsets prev -A and -B, but following -A or -B
 		   may override it */
 		if (!(option_mask32 & OPT_A)) /* not overridden */
-			slines_after = Copt;
+			lines_after = Copt;
 		if (!(option_mask32 & OPT_B)) /* not overridden */
-			slines_before = Copt;
-		option_mask32 |= OPT_A|OPT_B; /* for parser */
-	}
-	if (option_mask32 & OPT_A) {
-		lines_after = xatoi_u(slines_after);
-	}
-	if (option_mask32 & OPT_B) {
-		lines_before = xatoi_u(slines_before);
+			lines_before = Copt;
+		//option_mask32 |= OPT_A|OPT_B; /* for parser */
 	}
 	/* sanity checks */
 	if (option_mask32 & (OPT_c|OPT_q|OPT_l|OPT_L)) {
@@ -444,13 +440,11 @@ int grep_main(int argc, char **argv)
 		before_buf = xzalloc(lines_before * sizeof(char *));
 #else
 	/* with auto sanity checks */
-	opt_complementary = "H-h:e::f::c-n:q-n:l-n";
+	/* -H unsets -h; -c,-q or -l unset -n; -e,-f are lists; -m N */
+	opt_complementary = "H-h:c-n:q-n:l-n:e::f::m+";
 	getopt32(argv, OPTSTR_GREP,
-		&pattern_head, &fopt, &mopt);
+		&pattern_head, &fopt, &max_matches);
 #endif
-	if (option_mask32 & OPT_m) {
-		max_matches = xatoi_u(mopt);
-	}
 	invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
 
 	if (pattern_head != NULL) {
@@ -481,8 +475,8 @@ int grep_main(int argc, char **argv)
 	argv += optind;
 	argc -= optind;
 
-	/* if we didn't get a pattern from a -e and no command file was specified,
-	 * argv[optind] should be the pattern. no pattern, no worky */
+	/* if we didn't get a pattern from -e and no command file was specified,
+	 * first parameter should be the pattern. no pattern, no worky */
 	if (pattern_head == NULL) {
 		char *pattern;
 		if (*argv == NULL)
@@ -508,7 +502,7 @@ int grep_main(int argc, char **argv)
 	do {
 		cur_file = *argv++;
 		file = stdin;
-		if (!cur_file || (*cur_file == '-' && !cur_file[1])) {
+		if (!cur_file || LONE_DASH(cur_file)) {
 			cur_file = "(standard input)";
 		} else {
 			if (option_mask32 & OPT_r) {
diff --git a/init/halt.c b/init/halt.c
index 1f0fae302..c14f0f221 100644
--- a/init/halt.c
+++ b/init/halt.c
@@ -33,7 +33,7 @@ RB_AUTOBOOT
 	};
 	static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
 
-	char *delay;
+	int delay = 0;
 	int which, flags, rc = 1;
 #if ENABLE_FEATURE_WTMP
 	struct utmp utmp;
@@ -46,9 +46,10 @@ RB_AUTOBOOT
 		continue;
 
 	/* Parse and handle arguments */
+	opt_complementary = "d+"; /* -d N */
 	flags = getopt32(argv, "d:nfw", &delay);
-	if (flags & 1)
-		sleep(xatou(delay));
+
+	sleep(delay);
 
 #if ENABLE_FEATURE_WTMP
 	if (access(bb_path_wtmp_file, R_OK|W_OK) == -1) {
diff --git a/init/init.c b/init/init.c
index 1145c0490..6d4969c4b 100644
--- a/init/init.c
+++ b/init/init.c
@@ -818,14 +818,14 @@ static void reload_signal(int sig ATTRIBUTE_UNUSED)
 }
 
 int init_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int init_main(int argc, char **argv)
+int init_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	struct init_action *a;
 	pid_t wpid;
 
 	die_sleep = 30 * 24*60*60; /* if xmalloc will ever die... */
 
-	if (argc > 1 && !strcmp(argv[1], "-q")) {
+	if (argv[1] && !strcmp(argv[1], "-q")) {
 		return kill(1, SIGHUP);
 	}
 
@@ -868,7 +868,7 @@ int init_main(int argc, char **argv)
 			putenv((char *) *e);
 	}
 
-	if (argc > 1) setenv("RUNLEVEL", argv[1], 1);
+	if (argv[1]) setenv("RUNLEVEL", argv[1], 1);
 
 	/* Hello world */
 	message(MAYBE_CONSOLE | L_LOG, "init started: %s", bb_banner);
@@ -890,7 +890,7 @@ int init_main(int argc, char **argv)
 	}
 
 	/* Check if we are supposed to be in single user mode */
-	if (argc > 1
+	if (argv[1]
 	 && (!strcmp(argv[1], "single") || !strcmp(argv[1], "-s") || LONE_CHAR(argv[1], '1'))
 	) {
 		/* Start a shell on console */
diff --git a/ipsvd/tcpudp.c b/ipsvd/tcpudp.c
index 8f23ca640..8f6616fe0 100644
--- a/ipsvd/tcpudp.c
+++ b/ipsvd/tcpudp.c
@@ -163,7 +163,7 @@ static void sig_child_handler(int sig ATTRIBUTE_UNUSED)
 int tcpudpsvd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int tcpudpsvd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
-	char *str_c, *str_C, *str_b, *str_t;
+	char *str_C, *str_t;
 	char *user;
 	struct hcc *hccp;
 	const char *instructs;
@@ -189,21 +189,20 @@ int tcpudpsvd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 
 	tcp = (applet_name[0] == 't');
 
-	/* 3+ args, -i at most once, -p implies -h, -v is counter */
-	opt_complementary = "-3:i--i:ph:vv";
+	/* 3+ args, -i at most once, -p implies -h, -v is counter, -b N, -c N */
+	opt_complementary = "-3:i--i:ph:vv:b+:c+";
 #ifdef SSLSVD
 	getopt32(argv, "+c:C:i:x:u:l:Eb:hpt:vU:/:Z:K:",
-		&str_c, &str_C, &instructs, &instructs, &user, &preset_local_hostname,
-		&str_b, &str_t, &ssluser, &root, &cert, &key, &verbose
+		&cmax, &str_C, &instructs, &instructs, &user, &preset_local_hostname,
+		&backlog, &str_t, &ssluser, &root, &cert, &key, &verbose
 	);
 #else
+	/* "+": stop on first non-option */
 	getopt32(argv, "+c:C:i:x:u:l:Eb:hpt:v",
-		&str_c, &str_C, &instructs, &instructs, &user, &preset_local_hostname,
-		&str_b, &str_t, &verbose
+		&cmax, &str_C, &instructs, &instructs, &user, &preset_local_hostname,
+		&backlog, &str_t, &verbose
 	);
 #endif
-	if (option_mask32 & OPT_c)
-		cmax = xatou_range(str_c, 1, INT_MAX);
 	if (option_mask32 & OPT_C) { /* -C n[:message] */
 		max_per_host = bb_strtou(str_C, &str_C, 10);
 		if (str_C[0]) {
@@ -219,8 +218,6 @@ int tcpudpsvd_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		if (!get_uidgid(&ugid, user, 1))
 			bb_error_msg_and_die("unknown user/group: %s", user);
 	}
-	if (option_mask32 & OPT_b)
-		backlog = xatou(str_b);
 #ifdef SSLSVD
 	if (option_mask32 & OPT_U) ssluser = optarg;
 	if (option_mask32 & OPT_slash) root = optarg;
diff --git a/libbb/getopt32.c b/libbb/getopt32.c
index 9e53dfd08..51e030653 100644
--- a/libbb/getopt32.c
+++ b/libbb/getopt32.c
@@ -117,7 +117,7 @@ const char *opt_complementary
         if w is given once, GNU ps sets the width to 132,
         if w is given more than once, it is "unlimited"
 
-        int w_counter = 0;
+        int w_counter = 0; // must be initialized!
         opt_complementary = "ww";
         getopt32(argv, "w", &w_counter);
         if (w_counter)
@@ -220,7 +220,7 @@ Special characters:
  "x--x" Variation of the above, it means that -x option should occur
         at most once.
 
- "a+:"  A plus after a char in opt_complementary means that the parameter
+ "a+"   A plus after a char in opt_complementary means that the parameter
         for this option is a nonnegative integer. It will be processed
         with xatoi_u() - allowed range is 0..INT_MAX.
 
@@ -255,7 +255,7 @@ Special characters:
         For example from "id" applet:
 
         // Don't allow -n -r -rn -ug -rug -nug -rnug
-        opt_complementary = "r?ug:n?ug:?u--g:g--u";
+        opt_complementary = "r?ug:n?ug:u--g:g--u";
         flags = getopt32(argv, "rnug");
 
         This example allowed only:
@@ -545,11 +545,14 @@ getopt32(char **argv, const char *applet_opts, ...)
 		if (on_off->counter)
 			(*(on_off->counter))++;
 		if (on_off->param_type == PARAM_LIST) {
-			llist_add_to_end((llist_t **)(on_off->optarg), optarg);
+			if (optarg)
+				llist_add_to_end((llist_t **)(on_off->optarg), optarg);
 		} else if (on_off->param_type == PARAM_INT) {
-			*(unsigned*)(on_off->optarg) = xatoi_u(optarg);
+			if (optarg)
+				*(unsigned*)(on_off->optarg) = xatoi_u(optarg);
 		} else if (on_off->optarg) {
-			*(char **)(on_off->optarg) = optarg;
+			if (optarg)
+				*(char **)(on_off->optarg) = optarg;
 		}
 		if (pargv != NULL)
 			break;
diff --git a/loginutils/addgroup.c b/loginutils/addgroup.c
index 31e507045..b25f8171d 100644
--- a/loginutils/addgroup.c
+++ b/loginutils/addgroup.c
@@ -123,7 +123,7 @@ static void add_user_to_group(char **args,
  * will add an existing user to an existing group.
  */
 int addgroup_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int addgroup_main(int argc, char **argv)
+int addgroup_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char *group;
 	gid_t gid = 0;
@@ -144,10 +144,10 @@ int addgroup_main(int argc, char **argv)
 	}
 	/* move past the commandline options */
 	argv += optind;
-	argc -= optind;
+	//argc -= optind;
 
 #if ENABLE_FEATURE_ADDUSER_TO_GROUP
-	if (argc == 2) {
+	if (argv[1]) {
 		struct group *gr;
 
 		if (option_mask32) {
@@ -170,7 +170,7 @@ int addgroup_main(int argc, char **argv)
 		add_user_to_group(argv, bb_path_group_file, xfopen);
 #if ENABLE_FEATURE_SHADOWPASSWDS
 		add_user_to_group(argv, bb_path_gshadow_file, fopen_or_warn);
-#endif /* ENABLE_FEATURE_SHADOWPASSWDS */
+#endif
 	} else
 #endif /* ENABLE_FEATURE_ADDUSER_TO_GROUP */
 		new_group(argv[0], gid);
diff --git a/loginutils/login.c b/loginutils/login.c
index d7eb8d35b..e8fe74e16 100644
--- a/loginutils/login.c
+++ b/loginutils/login.c
@@ -221,7 +221,7 @@ static void alarm_handler(int sig ATTRIBUTE_UNUSED)
 }
 
 int login_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int login_main(int argc, char **argv)
+int login_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	enum {
 		LOGIN_OPT_f = (1<<0),
@@ -269,8 +269,9 @@ int login_main(int argc, char **argv)
 			bb_error_msg_and_die("-f is for root only");
 		safe_strncpy(username, opt_user, sizeof(username));
 	}
-	if (optind < argc) /* user from command line (getty) */
-		safe_strncpy(username, argv[optind], sizeof(username));
+	argv += optind;
+	if (argv[0]) /* user from command line (getty) */
+		safe_strncpy(username, argv[0], sizeof(username));
 
 	/* Let's find out and memorize our tty */
 	if (!isatty(0) || !isatty(1) || !isatty(2))
diff --git a/loginutils/sulogin.c b/loginutils/sulogin.c
index caa1a8335..17bb15efa 100644
--- a/loginutils/sulogin.c
+++ b/loginutils/sulogin.c
@@ -19,7 +19,6 @@ int sulogin_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	char *cp;
 	int timeout = 0;
-	char *timeout_arg;
 	struct passwd *pwd;
 	const char *shell;
 #if ENABLE_FEATURE_SHADOWPASSWDS
@@ -31,9 +30,8 @@ int sulogin_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	logmode = LOGMODE_BOTH;
 	openlog(applet_name, 0, LOG_AUTH);
 
-	if (getopt32(argv, "t:", &timeout_arg)) {
-		timeout = xatoi_u(timeout_arg);
-	}
+	opt_complementary = "t+"; /* -t N */
+	getopt32(argv, "t:", &timeout);
 
 	if (argv[optind]) {
 		close(0);
@@ -43,6 +41,7 @@ int sulogin_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		dup(0);
 	}
 
+	/* Malicious use like "sulogin /dev/sda"? */
 	if (!isatty(0) || !isatty(1) || !isatty(2)) {
 		logmode = LOGMODE_SYSLOG;
 		bb_error_msg_and_die("not a tty");
diff --git a/miscutils/mt.c b/miscutils/mt.c
index c16073c61..c56a8e0ca 100644
--- a/miscutils/mt.c
+++ b/miscutils/mt.c
@@ -81,24 +81,22 @@ static const char opcode_name[] ALIGN1 =
 	"weof"            "\0";
 
 int mt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int mt_main(int argc, char **argv)
+int mt_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	const char *file = "/dev/tape";
 	struct mtop op;
 	struct mtpos position;
 	int fd, mode, idx;
 
-	if (argc < 2) {
+	if (!argv[1]) {
 		bb_show_usage();
 	}
 
 	if (strcmp(argv[1], "-f") == 0) {
-		if (argc < 4) {
+		if (!argv[2] || !argv[3])
 			bb_show_usage();
-		}
 		file = argv[2];
 		argv += 2;
-		argc -= 2;
 	}
 
 	idx = index_in_strings(opcode_name, argv[1]);
@@ -107,7 +105,7 @@ int mt_main(int argc, char **argv)
 		bb_error_msg_and_die("unrecognized opcode %s", argv[1]);
 
 	op.mt_op = opcode_value[idx];
-	if (argc >= 3)
+	if (argv[2])
 		op.mt_count = xatoi_u(argv[2]);
 	else
 		op.mt_count = 1;		/* One, not zero, right? */
diff --git a/networking/arping.c b/networking/arping.c
index 6a17b18ee..39dcb7cc2 100644
--- a/networking/arping.c
+++ b/networking/arping.c
@@ -264,16 +264,14 @@ int arping_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	err_str = xasprintf("interface %s %%s", device);
 	{
 		unsigned opt;
-		char *str_count, *str_timeout;
+		char *str_timeout;
 
 		/* Dad also sets quit_on_reply.
 		 * Advert also sets unsolicited.
 		 */
-		opt_complementary = "=1:Df:AU";
+		opt_complementary = "=1:Df:AU:c+";
 		opt = getopt32(argv, "DUAqfbc:w:I:s:",
-				&str_count, &str_timeout, &device, &source);
-		if (opt & 0x40) /* -c: count */
-			count = xatoi_u(str_count);
+				&count, &str_timeout, &device, &source);
 		if (opt & 0x80) /* -w: timeout */
 			timeout_us = xatou_range(str_timeout, 0, INT_MAX/2000000) * 1000000 + 500000;
 		//if (opt & 0x200) /* -s: source */
diff --git a/networking/nc_bloaty.c b/networking/nc_bloaty.c
index 34f715fc5..dd94a1460 100644
--- a/networking/nc_bloaty.c
+++ b/networking/nc_bloaty.c
@@ -674,7 +674,7 @@ Debug("wrote %d to net, errno %d", rr, errno);
 int nc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int nc_main(int argc, char **argv)
 {
-	char *str_p, *str_s, *str_w;
+	char *str_p, *str_s;
 	USE_NC_EXTRA(char *str_i, *str_o;)
 	char *themdotted = themdotted; /* gcc */
 	char **proggie;
@@ -710,10 +710,10 @@ int nc_main(int argc, char **argv)
  e_found:
 
 	// -g -G -t -r deleted, unimplemented -a deleted too
-	opt_complementary = "?2:vv"; /* max 2 params, -v is a counter */
+	opt_complementary = "?2:vv:w+"; /* max 2 params; -v is a counter; -w N */
 	getopt32(argv, "hnp:s:uvw:" USE_NC_SERVER("l")
 			USE_NC_EXTRA("i:o:z"),
-			&str_p, &str_s, &str_w
+			&str_p, &str_s, &o_wait
 			USE_NC_EXTRA(, &str_i, &str_o, &o_verbose));
 	argv += optind;
 #if ENABLE_NC_EXTRA
@@ -731,9 +731,7 @@ int nc_main(int argc, char **argv)
 	//if (option_mask32 & OPT_r) /* randomize various things */
 	//if (option_mask32 & OPT_u) /* use UDP */
 	//if (option_mask32 & OPT_v) /* verbose */
-	if (option_mask32 & OPT_w) { /* wait time */
-		o_wait = xatoi_u(str_w);
-	}
+	//if (option_mask32 & OPT_w) /* wait time */
 	//if (option_mask32 & OPT_z) /* little or no data xfer */
 
 	/* We manage our fd's so that they are never 0,1,2 */
diff --git a/networking/tftp.c b/networking/tftp.c
index 14c340b22..187261568 100644
--- a/networking/tftp.c
+++ b/networking/tftp.c
@@ -397,9 +397,6 @@ int tftp_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	len_and_sockaddr *peer_lsa;
 	const char *localfile = NULL;
 	const char *remotefile = NULL;
-#if ENABLE_FEATURE_TFTP_BLOCKSIZE
-	const char *sblocksize = NULL;
-#endif
 	int port;
 	USE_GETPUT(int cmd;)
 	int fd = -1;
@@ -409,13 +406,14 @@ int tftp_main(int argc ATTRIBUTE_UNUSED, char **argv)
 
 	/* -p or -g is mandatory, and they are mutually exclusive */
 	opt_complementary = "" USE_FEATURE_TFTP_GET("g:") USE_FEATURE_TFTP_PUT("p:")
-			USE_GETPUT("?g--p:p--g");
+			USE_GETPUT("g--p:p--g:")
+			USE_FEATURE_TFTP_BLOCKSIZE("b+");
 
 	USE_GETPUT(cmd =) getopt32(argv,
 			USE_FEATURE_TFTP_GET("g") USE_FEATURE_TFTP_PUT("p")
 				"l:r:" USE_FEATURE_TFTP_BLOCKSIZE("b:"),
 			&localfile, &remotefile
-			USE_FEATURE_TFTP_BLOCKSIZE(, &sblocksize));
+			USE_FEATURE_TFTP_BLOCKSIZE(, &blocksize));
 	argv += optind;
 
 	flags = O_RDONLY;
@@ -423,12 +421,8 @@ int tftp_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		flags = O_WRONLY | O_CREAT | O_TRUNC;
 
 #if ENABLE_FEATURE_TFTP_BLOCKSIZE
-	if (sblocksize) {
-		blocksize = xatoi_u(sblocksize);
-		if (!tftp_blocksize_check(blocksize, 0)) {
-			return EXIT_FAILURE;
-		}
-	}
+	if (!tftp_blocksize_check(blocksize, 0))
+		return EXIT_FAILURE;
 #endif
 
 	if (!localfile)
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index 576b1cbb8..fe8f4c8fa 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -132,7 +132,7 @@ int udhcpc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 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;
+	char *str_c, *str_V, *str_h, *str_F, *str_r;
 	USE_FEATURE_UDHCP_PORT(char *str_P;)
 	llist_t *list_O = NULL;
 #if ENABLE_FEATURE_UDHCPC_ARPING
@@ -223,7 +223,8 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	client_config.script = DEFAULT_SCRIPT;
 
 	/* Parse command line */
-	opt_complementary = "c--C:C--c:O::"; // Cc: mutually exclusive; O: list
+	/* Cc: mutually exclusive; O: list; -T,-t,-A take numeric param */
+	opt_complementary = "c--C:C--c:O::T+:t+:A+";
 #if ENABLE_GETOPT_LONG
 	applet_long_options = udhcpc_longopts;
 #endif
@@ -233,7 +234,8 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		"O:"
 		, &str_c, &str_V, &str_h, &str_h, &str_F
 		, &client_config.interface, &client_config.pidfile, &str_r
-		, &client_config.script, &str_T, &str_t, &str_A
+		, &client_config.script
+		, &discover_timeout, &discover_retries, &tryagain_timeout
 		USE_FEATURE_UDHCPC_ARPING(, &str_W)
 		USE_FEATURE_UDHCP_PORT(, &str_P)
 		, &list_O
@@ -273,12 +275,9 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	if (opt & OPT_r)
 		requested_ip = inet_addr(str_r);
 	// if (opt & OPT_s) client_config.script = ...
-	if (opt & OPT_T)
-		discover_timeout = xatoi_u(str_T);
-	if (opt & OPT_t)
-		discover_retries = xatoi_u(str_t);
-	if (opt & OPT_A)
-		tryagain_timeout = xatoi_u(str_A);
+	// if (opt & OPT_T) discover_timeout = xatoi_u(str_T);
+	// if (opt & OPT_t) discover_retries = xatoi_u(str_t);
+	// if (opt & OPT_A) tryagain_timeout = xatoi_u(str_A);
 	if (opt & OPT_v) {
 		puts("version "BB_VER);
 		return 0;
diff --git a/runit/sv.c b/runit/sv.c
index 45d5572f8..d5a9bd9cf 100644
--- a/runit/sv.c
+++ b/runit/sv.c
@@ -422,7 +422,7 @@ int sv_main(int argc, char **argv)
 	char **servicex;
 	unsigned waitsec = 7;
 	smallint kll = 0;
-	smallint verbose = 0;
+	int verbose = 0;
 	int (*act)(const char*);
 	int (*cbk)(const char*);
 	int curdir;
@@ -436,9 +436,8 @@ int sv_main(int argc, char **argv)
 	x = getenv("SVWAIT");
 	if (x) waitsec = xatou(x);
 
-	opt = getopt32(argv, "w:v", &x);
-	if (opt & 1) waitsec = xatou(x); // -w
-	if (opt & 2) verbose = 1; // -v
+	opt_complementary = "w+:vv"; /* -w N, -v is a counter */
+	opt = getopt32(argv, "w:v", &waitsec, &verbose);
 	argc -= optind;
 	argv += optind;
 	action = *argv++;
diff --git a/util-linux/fdformat.c b/util-linux/fdformat.c
index c4f97ae34..eac7b15e9 100644
--- a/util-linux/fdformat.c
+++ b/util-linux/fdformat.c
@@ -41,7 +41,7 @@ struct format_descr {
 #define FD_FILL_BYTE 0xF6 /* format fill byte. */
 
 int fdformat_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int fdformat_main(int argc, char **argv)
+int fdformat_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int fd, n, cyl, read_bytes, verify;
 	unsigned char *data;
@@ -49,9 +49,7 @@ int fdformat_main(int argc, char **argv)
 	struct floppy_struct param;
 	struct format_descr descr;
 
-	if (argc < 2) {
-		bb_show_usage();
-	}
+	opt_complementary = "=1"; /* must have 1 param */
 	verify = !getopt32(argv, "n");
 	argv += optind;
 
diff --git a/util-linux/mkfs_minix.c b/util-linux/mkfs_minix.c
index 3fbdc2020..60031a5c3 100644
--- a/util-linux/mkfs_minix.c
+++ b/util-linux/mkfs_minix.c
@@ -627,7 +627,7 @@ int mkfs_minix_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	unsigned opt;
 	char *tmp;
 	struct stat statbuf;
-	char *str_i, *str_n;
+	char *str_i;
 	char *listfile = NULL;
 
 	INIT_G();
@@ -643,13 +643,13 @@ int mkfs_minix_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		bb_error_msg_and_die("bad inode size");
 #endif
 
-	opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &str_n);
+	opt_complementary = "n+"; /* -n N */
+	opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &G.namelen);
 	argv += optind;
 	//if (opt & 1) -c
 	if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i
 	//if (opt & 4) -l
 	if (opt & 8) { // -n
-		G.namelen = xatoi_u(str_n);
 		if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC;
 		else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2;
 		else bb_show_usage();
diff --git a/util-linux/readprofile.c b/util-linux/readprofile.c
index ef7865951..e25d07d2b 100644
--- a/util-linux/readprofile.c
+++ b/util-linux/readprofile.c
@@ -8,7 +8,7 @@
  */
 
 /*
- * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
+ * 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL>
  * - added Native Language Support
  * 1999-09-01 Stephane Eranian <eranian@cello.hpl.hp.com>
  * - 64bit clean patch
@@ -45,7 +45,7 @@ int readprofile_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int readprofile_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	FILE *map;
-	const char *mapFile, *proFile, *mult = 0;
+	const char *mapFile, *proFile;
 	unsigned long indx = 1;
 	size_t len;
 	uint64_t add0 = 0;
@@ -55,37 +55,49 @@ int readprofile_main(int argc ATTRIBUTE_UNUSED, char **argv)
 	char fn_name[S_LEN], next_name[S_LEN];   /* current and next name */
 	char mapline[S_LEN];
 	char mode[8];
-	int optAll = 0, optInfo = 0, optReset = 0;
-	int optVerbose = 0, optNative = 0;
-	int optBins = 0, optSub = 0;
 	int maplineno = 1;
 	int header_printed;
+	int multiplier = 0;
+	unsigned opt;
+	enum {
+		OPT_M = (1 << 0),
+		OPT_m = (1 << 1),
+		OPT_p = (1 << 2),
+		OPT_n = (1 << 3),
+		OPT_a = (1 << 4),
+		OPT_b = (1 << 5),
+		OPT_s = (1 << 6),
+		OPT_i = (1 << 7),
+		OPT_r = (1 << 8),
+		OPT_v = (1 << 9),
+	};
+#define optMult    (opt & OPT_M)
+#define optNative  (opt & OPT_n)
+#define optAll     (opt & OPT_a)
+#define optBins    (opt & OPT_b)
+#define optSub     (opt & OPT_s)
+#define optInfo    (opt & OPT_i)
+#define optReset   (opt & OPT_r)
+#define optVerbose (opt & OPT_v)
 
 #define next (current^1)
 
 	proFile = defaultpro;
 	mapFile = defaultmap;
 
-	opt_complementary = "nn:aa:bb:ss:ii:rr:vv";
-	getopt32(argv, "M:m:p:nabsirv",
-			&mult, &mapFile, &proFile,
-			&optNative, &optAll, &optBins, &optSub,
-			&optInfo, &optReset, &optVerbose);
+	opt_complementary = "M+"; /* -M N */
+	opt = getopt32(argv, "M:m:p:nabsirv", &multiplier, &mapFile, &proFile);
 
-	if (optReset || mult) {
-		int multiplier, fd, to_write;
+	if (opt & (OPT_M|OPT_r)) { /* mult or reset, or both */
+		int fd, to_write;
 
 		/*
 		 * When writing the multiplier, if the length of the write is
 		 * not sizeof(int), the multiplier is not changed
 		 */
-		if (mult) {
-			multiplier = xatoi_u(mult);
-			to_write = sizeof(int);
-		} else {
-			multiplier = 0;
+		to_write = sizeof(int);
+		if (!optMult)
 			to_write = 1;	/* sth different from sizeof(int) */
-		}
 
 		fd = xopen(defaultpro, O_WRONLY);
 		xwrite(fd, &multiplier, to_write);
@@ -187,8 +199,9 @@ int readprofile_main(int argc ATTRIBUTE_UNUSED, char **argv)
 		if (optBins) {
 			if (optVerbose || this > 0)
 				printf("  total\t\t\t\t%u\n", this);
-		} else if ((this || optAll) &&
-			   (fn_len = next_add-fn_add) != 0) {
+		} else if ((this || optAll)
+		        && (fn_len = next_add-fn_add) != 0
+		) {
 			if (optVerbose)
 				printf("%016llx %-40s %6i %8.4f\n", fn_add,
 				       fn_name, this, this/(double)fn_len);
diff --git a/util-linux/setarch.c b/util-linux/setarch.c
index dbc02de5e..1f979a73c 100644
--- a/util-linux/setarch.c
+++ b/util-linux/setarch.c
@@ -12,7 +12,7 @@
 #include "libbb.h"
 
 int setarch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int setarch_main(int ATTRIBUTE_UNUSED argc, char **argv)
+int setarch_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int pers = -1;
 
diff --git a/util-linux/swaponoff.c b/util-linux/swaponoff.c
index 48f6f4e0b..beefac030 100644
--- a/util-linux/swaponoff.c
+++ b/util-linux/swaponoff.c
@@ -59,11 +59,11 @@ static int do_em_all(void)
 }
 
 int swap_on_off_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int swap_on_off_main(int argc, char **argv)
+int swap_on_off_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
 	int ret;
 
-	if (argc == 1)
+	if (!argv[1])
 		bb_show_usage();
 
 	ret = getopt32(argv, "a");