getopt32: remove opt_complementary

function                                             old     new   delta
vgetopt32                                           1318    1392     +74
runsvdir_main                                        703     713     +10
bb_make_directory                                    423     425      +2
collect_cpu                                          546     545      -1
opt_chars                                              3       -      -3
opt_complementary                                      4       -      -4
tftpd_main                                           567     562      -5
ntp_init                                             476     471      -5
zcip_main                                           1266    1256     -10
xxd_main                                             428     418     -10
whois_main                                           140     130     -10
who_main                                             463     453     -10
which_main                                           212     202     -10
wget_main                                           2535    2525     -10
watchdog_main                                        291     281     -10
watch_main                                           222     212     -10
vlock_main                                           399     389     -10
uuencode_main                                        332     322     -10
uudecode_main                                        316     306     -10
unlink_main                                           45      35     -10
udhcpd_main                                         1482    1472     -10
udhcpc_main                                         2762    2752     -10
tune2fs_main                                         290     280     -10
tunctl_main                                          366     356     -10
truncate_main                                        218     208     -10
tr_main                                              518     508     -10
time_main                                           1134    1124     -10
tftp_main                                            286     276     -10
telnetd_main                                        1873    1863     -10
tcpudpsvd_main                                      1785    1775     -10
taskset_main                                         521     511     -10
tar_main                                            1009     999     -10
tail_main                                           1644    1634     -10
syslogd_main                                        1967    1957     -10
switch_root_main                                     368     358     -10
svlogd_main                                         1454    1444     -10
sv                                                  1296    1286     -10
stat_main                                            104      94     -10
start_stop_daemon_main                              1028    1018     -10
split_main                                           542     532     -10
sort_main                                            796     786     -10
slattach_main                                        624     614     -10
shuf_main                                            504     494     -10
setsid_main                                           96      86     -10
setserial_main                                      1132    1122     -10
setfont_main                                         388     378     -10
setconsole_main                                       78      68     -10
sendmail_main                                       1209    1199     -10
sed_main                                             677     667     -10
script_main                                         1077    1067     -10
run_parts_main                                       325     315     -10
rtcwake_main                                         454     444     -10
rm_main                                              175     165     -10
reformime_main                                       119     109     -10
readlink_main                                        123     113     -10
rdate_main                                           246     236     -10
pwdx_main                                            189     179     -10
pstree_main                                          317     307     -10
pscan_main                                           663     653     -10
popmaildir_main                                      818     808     -10
pmap_main                                             80      70     -10
nc_main                                             1042    1032     -10
mv_main                                              558     548     -10
mountpoint_main                                      477     467     -10
mount_main                                          1264    1254     -10
modprobe_main                                        768     758     -10
modinfo_main                                         333     323     -10
mktemp_main                                          200     190     -10
mkswap_main                                          324     314     -10
mkfs_vfat_main                                      1489    1479     -10
microcom_main                                        715     705     -10
md5_sha1_sum_main                                    521     511     -10
man_main                                             867     857     -10
makedevs_main                                       1052    1042     -10
ls_main                                              563     553     -10
losetup_main                                         432     422     -10
loadfont_main                                         89      79     -10
ln_main                                              524     514     -10
link_main                                             75      65     -10
ipcalc_main                                          544     534     -10
iostat_main                                         2397    2387     -10
install_main                                         768     758     -10
id_main                                              480     470     -10
i2cset_main                                         1239    1229     -10
i2cget_main                                          380     370     -10
i2cdump_main                                        1482    1472     -10
i2cdetect_main                                       682     672     -10
hwclock_main                                         406     396     -10
httpd_main                                           741     731     -10
grep_main                                            837     827     -10
getty_main                                          1559    1549     -10
fuser_main                                           297     287     -10
ftpgetput_main                                       345     335     -10
ftpd_main                                           2232    2222     -10
fstrim_main                                          251     241     -10
fsfreeze_main                                         77      67     -10
fsck_minix_main                                     2921    2911     -10
flock_main                                           314     304     -10
flashcp_main                                         740     730     -10
flash_eraseall_main                                  833     823     -10
fdformat_main                                        532     522     -10
expand_main                                          680     670     -10
eject_main                                           335     325     -10
dumpleases_main                                      630     620     -10
du_main                                              314     304     -10
dos2unix_main                                        441     431     -10
diff_main                                           1350    1340     -10
df_main                                             1064    1054     -10
date_main                                           1095    1085     -10
cut_main                                             961     951     -10
cryptpw_main                                         228     218     -10
crontab_main                                         575     565     -10
crond_main                                          1149    1139     -10
cp_main                                              370     360     -10
common_traceroute_main                              3834    3824     -10
common_ping_main                                    1767    1757     -10
comm_main                                            239     229     -10
cmp_main                                             655     645     -10
chrt_main                                            379     369     -10
chpst_main                                           704     694     -10
chpasswd_main                                        308     298     -10
chown_main                                           171     161     -10
chmod_main                                           158     148     -10
cat_main                                             428     418     -10
bzip2_main                                           120     110     -10
blkdiscard_main                                      264     254     -10
base64_main                                          221     211     -10
arping_main                                         1665    1655     -10
ar_main                                              556     546     -10
adjtimex_main                                        406     396     -10
adduser_main                                         882     872     -10
addgroup_main                                        411     401     -10
acpid_main                                          1198    1188     -10
optstring                                             11       -     -11
opt_string                                            18       -     -18
OPT_STR                                               25       -     -25
ubi_tools_main                                      1288    1258     -30
ls_options                                            31       -     -31
------------------------------------------------------------------------------
(add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383)      Total: -1297 bytes
   text	   data	    bss	    dec	    hex	filename
 915428	    485	   6876	 922789	  e14a5	busybox_old
 914629	    485	   6872	 921986	  e1182	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

archival/ar.c

@@ -243,10 +243,13 @@ int ar_main(int argc UNUSED_PARAM, char **argv)
 	/* prepend '-' to the first argument if required */
 	if (argv[1] && argv[1][0] != '-' && argv[1][0] != '\0')
 		argv[1] = xasprintf("-%s", argv[1]);
-	/* -1: at least one param is reqd */
-	/* one of p,t,x[,r] is required */
-	opt_complementary = "-1:p:t:x"IF_FEATURE_AR_CREATE(":r");
-	opt = getopt32(argv, "voc""ptx"IF_FEATURE_AR_CREATE("r"));
+	opt = getopt32(argv, "^"
+		"voc""ptx"IF_FEATURE_AR_CREATE("r")
+		"\0"
+		/* -1: at least one arg is reqd */
+		/* one of p,t,x[,r] is required */
+		"-1:p:t:x"IF_FEATURE_AR_CREATE(":r")
+	);
 	argv += optind;
 
 	t = opt / FIRST_CMD;

archival/bzip2.c

@@ -195,9 +195,11 @@ int bzip2_main(int argc UNUSED_PARAM, char **argv)
 	 * --best        alias for -9
 	 */
 
-	opt_complementary = "s2"; /* -s means -2 (compatibility) */
-	/* Must match bbunzip's constants OPT_STDOUT, OPT_FORCE! */
-	opt = getopt32(argv, "cfkv" IF_FEATURE_BZIP2_DECOMPRESS("dt") "123456789qzs");
+	opt = getopt32(argv, "^"
+		/* Must match bbunzip's constants OPT_STDOUT, OPT_FORCE! */
+		"cfkv" IF_FEATURE_BZIP2_DECOMPRESS("dt") "123456789qzs"
+		"\0" "s2" /* -s means -2 (compatibility) */
+	);
 #if ENABLE_FEATURE_BZIP2_DECOMPRESS /* bunzip2_main may not be visible... */
 	if (opt & 0x30) // -d and/or -t
 		return bunzip2_main(argc, argv);

archival/dpkg_deb.c

@@ -80,8 +80,9 @@ int dpkg_deb_main(int argc UNUSED_PARAM, char **argv)
 #endif
 
 	/* Must have 1 or 2 args */
-	opt_complementary = "-1:?2:c--efXx:e--cfXx:f--ceXx:X--cefx:x--cefX";
-	opt = getopt32(argv, "cefXx");
+	opt = getopt32(argv, "^" "cefXx"
+			"\0" "-1:?2:c--efXx:e--cfXx:f--ceXx:X--cefx:x--cefX"
+	);
 	argv += optind;
 	//argc -= optind;
 

archival/lzop.c

@@ -1138,7 +1138,7 @@ int lzop_main(int argc UNUSED_PARAM, char **argv)
 	/* -U is "anti -k", invert bit for bbunpack(): */
 	option_mask32 ^= OPT_KEEP;
 	/* -k disables -U (if any): */
-	/* opt_complementary = "k-U"; - nope, only handles -Uk, not -kU */
+	/* opt_complementary "k-U"? - nope, only handles -Uk, not -kU */
 	if (option_mask32 & OPT_k)
 		option_mask32 |= OPT_KEEP;
 

archival/tar.c

@@ -973,18 +973,6 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
 	/* Prepend '-' to the first argument if required */
 	if (argv[1] && argv[1][0] != '-' && argv[1][0] != '\0')
 		argv[1] = xasprintf("-%s", argv[1]);
-	opt_complementary =
-		"tt:vv:" // count -t,-v
-#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
-		"\xff::" // --exclude=PATTERN is a list
-#endif
-		IF_FEATURE_TAR_CREATE("c:") "t:x:" // at least one of these is reqd
-		IF_FEATURE_TAR_CREATE("c--tx:t--cx:x--ct") // mutually exclusive
-		IF_NOT_FEATURE_TAR_CREATE("t--x:x--t") // mutually exclusive
-#if ENABLE_FEATURE_TAR_LONG_OPTIONS
-		":\xf9+" // --strip-components=NUM
-#endif
-	;
 #if ENABLE_DESKTOP
 	/* Lie to buildroot when it starts asking stupid questions. */
 	if (argv[1] && strcmp(argv[1], "--version") == 0) {
@@ -1021,7 +1009,7 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
 		}
 	}
 #endif
-	opt = GETOPT32(argv,
+	opt = GETOPT32(argv, "^"
 		"txC:f:Oopvk"
 		IF_FEATURE_TAR_CREATE(   "ch"    )
 		IF_FEATURE_SEAMLESS_BZ2( "j"     )
@@ -1032,6 +1020,17 @@ int tar_main(int argc UNUSED_PARAM, char **argv)
 		IF_FEATURE_SEAMLESS_Z(   "Z"     )
 		IF_FEATURE_TAR_NOPRESERVE_TIME("m")
 		IF_FEATURE_TAR_LONG_OPTIONS("\xf9:") // --strip-components
+		"\0"
+		"tt:vv:" // count -t,-v
+#if ENABLE_FEATURE_TAR_LONG_OPTIONS && ENABLE_FEATURE_TAR_FROM
+		"\xff::" // --exclude=PATTERN is a list
+#endif
+		IF_FEATURE_TAR_CREATE("c:") "t:x:" // at least one of these is reqd
+		IF_FEATURE_TAR_CREATE("c--tx:t--cx:x--ct") // mutually exclusive
+		IF_NOT_FEATURE_TAR_CREATE("t--x:x--t") // mutually exclusive
+#if ENABLE_FEATURE_TAR_LONG_OPTIONS
+		":\xf9+" // --strip-components=NUM
+#endif
 		LONGOPTS
 		, &base_dir // -C dir
 		, &tar_filename // -f filename

console-tools/loadfont.c

@@ -348,8 +348,7 @@ int loadfont_main(int argc UNUSED_PARAM, char **argv)
 	unsigned char *buffer;
 
 	// no arguments allowed!
-	opt_complementary = "=0";
-	getopt32(argv, "");
+	getopt32(argv, "^" "" "\0" "=0");
 
 	/*
 	 * We used to look at the length of the input file
@@ -437,8 +436,7 @@ int setfont_main(int argc UNUSED_PARAM, char **argv)
 	char *mapfilename;
 	const char *tty_name = CURRENT_TTY;
 
-	opt_complementary = "=1";
-	opts = getopt32(argv, "m:C:", &mapfilename, &tty_name);
+	opts = getopt32(argv, "^" "m:C:" "\0" "=1", &mapfilename, &tty_name);
 	argv += optind;
 
 	fd = xopen_nonblocking(tty_name);

console-tools/setconsole.c

@@ -47,8 +47,7 @@ int setconsole_main(int argc UNUSED_PARAM, char **argv)
 	int reset;
 
 	/* at most one non-option argument */
-	opt_complementary = "?1";
-	reset = getopt32(argv, "r");
+	reset = getopt32(argv, "^" "r" "\0" "?1");
 
 	argv += 1 + reset;
 	if (*argv) {

coreutils/cat.c

@@ -170,9 +170,11 @@ int cat_main(int argc UNUSED_PARAM, char **argv)
 {
 	unsigned opts;
 
-	IF_FEATURE_CATV(opt_complementary = "Aetv"; /* -A == -vet */)
-	/* -u is ignored ("unbuffered") */
-	opts = getopt32(argv, IF_FEATURE_CATV("etvA") IF_FEATURE_CATN("nb") "u");
+	opts = getopt32(argv, IF_FEATURE_CATV("^")
+		/* -u is ignored ("unbuffered") */
+		IF_FEATURE_CATV("etvA")IF_FEATURE_CATN("nb")"u"
+		IF_FEATURE_CATV("\0" "Aetv" /* -A == -vet */)
+	);
 	argv += optind;
 
 	/* Read from stdin if there's nothing else to do. */

coreutils/chmod.c

@@ -123,8 +123,7 @@ int chmod_main(int argc UNUSED_PARAM, char **argv)
 	}
 
 	/* Parse options */
-	opt_complementary = "-2";
-	getopt32(argv, ("-"OPT_STR) + 1); /* Reuse string */
+	getopt32(argv, "^" OPT_STR "\0" "-2");
 	argv += optind;
 
 	/* Restore option-like mode if needed */

coreutils/chown.c

@@ -55,7 +55,7 @@
 /* This is a NOEXEC applet. Be very careful! */
 
 
-#define OPT_STR     ("Rh" IF_DESKTOP("vcfLHP"))
+#define OPT_STR     "Rh" IF_DESKTOP("vcfLHP")
 #define BIT_RECURSE 1
 #define OPT_RECURSE (opt & 1)
 #define OPT_NODEREF (opt & 2)
@@ -127,11 +127,10 @@ int chown_main(int argc UNUSED_PARAM, char **argv)
 	int opt, flags;
 	struct param_t param;
 
-	opt_complementary = "-2";
 #if ENABLE_FEATURE_CHOWN_LONG_OPTIONS
-	opt = getopt32long(argv, OPT_STR, chown_longopts);
+	opt = getopt32long(argv, "^" OPT_STR "\0" "=2", chown_longopts);
 #else
-	opt = getopt32(argv, OPT_STR);
+	opt = getopt32(argv, "^" OPT_STR "\0" "=2");
 #endif
 	argv += optind;
 

coreutils/comm.c

@@ -62,8 +62,7 @@ int comm_main(int argc UNUSED_PARAM, char **argv)
 	int i;
 	int order;
 
-	opt_complementary = "=2";
-	getopt32(argv, "123");
+	getopt32(argv, "^" "123" "\0" "=2");
 	argv += optind;
 
 	for (i = 0; i < 2; ++i) {

coreutils/cp.c

@@ -73,15 +73,17 @@ int cp_main(int argc, char **argv)
 #endif
 	};
 
-	// Need at least two arguments
-	// Soft- and hardlinking doesn't mix
-	// -P and -d are the same (-P is POSIX, -d is GNU)
-	// -r and -R are the same
-	// -R (and therefore -r) turns on -d (coreutils does this)
-	// -a = -pdR
-	opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR";
 #if ENABLE_FEATURE_CP_LONG_OPTIONS
-	flags = getopt32long(argv, FILEUTILS_CP_OPTSTR,
+	flags = getopt32long(argv, "^"
+		FILEUTILS_CP_OPTSTR
+		"\0"
+		// Need at least two arguments
+		// Soft- and hardlinking doesn't mix
+		// -P and -d are the same (-P is POSIX, -d is GNU)
+		// -r and -R are the same
+		// -R (and therefore -r) turns on -d (coreutils does this)
+		// -a = -pdR
+		"-2:l--s:s--l:Pd:rRd:Rd:apdR",
 		"archive\0"        No_argument "a"
 		"force\0"          No_argument "f"
 		"interactive\0"    No_argument "i"

coreutils/cut.c

@@ -42,7 +42,7 @@
 
 
 /* option vars */
-static const char optstring[] ALIGN1 = "b:c:f:d:sn";
+#define OPT_STR "b:c:f:d:sn"
 #define CUT_OPT_BYTE_FLGS     (1 << 0)
 #define CUT_OPT_CHAR_FLGS     (1 << 1)
 #define CUT_OPT_FIELDS_FLGS   (1 << 2)
@@ -201,8 +201,11 @@ int cut_main(int argc UNUSED_PARAM, char **argv)
 	char *sopt, *ltok;
 	unsigned opt;
 
-	opt_complementary = "b--bcf:c--bcf:f--bcf";
-	opt = getopt32(argv, optstring, &sopt, &sopt, &sopt, &ltok);
+	opt = getopt32(argv, "^"
+			OPT_STR
+			"\0" "b--bcf:c--bcf:f--bcf",
+			&sopt, &sopt, &sopt, &ltok
+	);
 //	argc -= optind;
 	argv += optind;
 	if (!(opt & (CUT_OPT_BYTE_FLGS | CUT_OPT_CHAR_FLGS | CUT_OPT_FIELDS_FLGS)))

coreutils/date.c

@@ -192,12 +192,16 @@ int date_main(int argc UNUSED_PARAM, char **argv)
 	char *filename;
 	char *isofmt_arg = NULL;
 
-	opt_complementary = "d--s:s--d"
-		IF_FEATURE_DATE_ISOFMT(":R--I:I--R");
-	opt = getopt32long(argv, "Rs:ud:r:"
-			IF_FEATURE_DATE_ISOFMT("I::D:"), date_longopts,
+	opt = getopt32long(argv, "^"
+			"Rs:ud:r:"
+			IF_FEATURE_DATE_ISOFMT("I::D:")
+			"\0"
+			"d--s:s--d"
+			IF_FEATURE_DATE_ISOFMT(":R--I:I--R"),
+			date_longopts,
 			&date_str, &date_str, &filename
-			IF_FEATURE_DATE_ISOFMT(, &isofmt_arg, &fmt_str2dt));
+			IF_FEATURE_DATE_ISOFMT(, &isofmt_arg, &fmt_str2dt)
+	);
 	argv += optind;
 	maybe_set_utc(opt);
 

coreutils/df.c

@@ -115,15 +115,18 @@ int df_main(int argc UNUSED_PARAM, char **argv)
 
 	init_unicode();
 
+	opt = getopt32(argv, "^"
+			"kPT"
+			IF_FEATURE_DF_FANCY("aiB:")
+			IF_FEATURE_HUMAN_READABLE("hm")
+			"\0"
 #if ENABLE_FEATURE_HUMAN_READABLE && ENABLE_FEATURE_DF_FANCY
-	opt_complementary = "k-mB:m-Bk:B-km";
+			"k-mB:m-Bk:B-km"
 #elif ENABLE_FEATURE_HUMAN_READABLE
-	opt_complementary = "k-m:m-k";
+			"k-m:m-k"
 #endif
-	opt = getopt32(argv, "kPT"
-			IF_FEATURE_DF_FANCY("aiB:")
-			IF_FEATURE_HUMAN_READABLE("hm")
-			IF_FEATURE_DF_FANCY(, &chp));
+			IF_FEATURE_DF_FANCY(, &chp)
+	);
 	if (opt & OPT_MEGA)
 		df_disp_hr = 1024*1024;
 

coreutils/dos2unix.c

@@ -120,8 +120,7 @@ int dos2unix_main(int argc UNUSED_PARAM, char **argv)
 	}
 
 	/* -u convert to unix, -d convert to dos */
-	opt_complementary = "u--d:d--u"; /* mutually exclusive */
-	o = getopt32(argv, "du");
+	o = getopt32(argv, "^" "du" "\0" "u--d:d--u"); /* mutually exclusive */
 
 	/* Do the conversion requested by an argument else do the default
 	 * conversion depending on our name.  */

coreutils/du.c

@@ -242,8 +242,11 @@ int du_main(int argc UNUSED_PARAM, 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", &G.max_print_depth);
+	opt = getopt32(argv, "^"
+			"aHkLsxd:+lchm"
+			"\0" "h-km:k-hm:m-hk:H-L:L-H:s-d:d-s",
+			&G.max_print_depth
+	);
 	argv += optind;
 	if (opt & OPT_h_for_humans) {
 		G.disp_unit = 0;
@@ -255,8 +258,11 @@ int du_main(int argc UNUSED_PARAM, char **argv)
 		G.disp_unit = 1024;
 	}
 #else
-	opt_complementary = "H-L:L-H:s-d:d-s";
-	opt = getopt32(argv, "aHkLsx" "d:+" "lc", &G.max_print_depth);
+	opt = getopt32(argv, "^"
+			"aHkLsxd:+lc"
+			"\0" "H-L:L-H:s-d:d-s",
+			&G.max_print_depth
+	);
 	argv += optind;
 #if !ENABLE_FEATURE_DU_DEFAULT_BLOCKSIZE_1K
 	if (opt & OPT_k_kbytes) {

coreutils/expand.c

@@ -174,9 +174,10 @@ int expand_main(int argc UNUSED_PARAM, char **argv)
 				, &opt_t
 		);
 	} else {
-		/* -t NUM sets also -a */
-		opt_complementary = "ta";
-		opt = getopt32long(argv, "ft:a",
+		opt = getopt32long(argv, "^"
+				"ft:a"
+				"\0"
+				"ta" /* -t NUM sets -a */,
 				"first-only\0"       No_argument       "i"
 				"tabs\0"             Required_argument "t"
 				"all\0"              No_argument       "a"

coreutils/id.c

@@ -170,9 +170,12 @@ int id_main(int argc UNUSED_PARAM, char **argv)
 	} else {
 		/* Don't allow -n -r -nr -ug -rug -nug -rnug -uZ -gZ -GZ*/
 		/* Don't allow more than one username */
-		opt_complementary = "?1:u--g:g--u:G--u:u--G:g--G:G--g:r?ugG:n?ugG"
-			IF_SELINUX(":u--Z:Z--u:g--Z:Z--g:G--Z:Z--G");
-		opt = getopt32(argv, "rnugG" IF_SELINUX("Z"));
+		opt = getopt32(argv, "^"
+			"rnugG" IF_SELINUX("Z")
+			"\0"
+			"?1:u--g:g--u:G--u:u--G:g--G:G--g:r?ugG:n?ugG"
+			IF_SELINUX(":u--Z:Z--u:g--Z:Z--g:G--Z:Z--G")
+		);
 	}
 
 	username = argv[optind];

coreutils/install.c

@@ -140,13 +140,16 @@ int install_main(int argc, char **argv)
 #endif
 	};
 
-	opt_complementary = "t--d:d--t:s--d:d--s" IF_FEATURE_INSTALL_LONG_OPTIONS(IF_SELINUX(":Z--\xff:\xff--Z"));
 	/* -c exists for backwards compatibility, it's needed */
 	/* -b is ignored ("make a backup of each existing destination file") */
-	opts = GETOPT32(argv, "cvb" "Ddpsg:m:o:t:" IF_SELINUX("Z:"),
-			LONGOPTS
-			&gid_str, &mode_str, &uid_str, &last
-			IF_SELINUX(, &scontext)
+	opts = GETOPT32(argv, "^"
+		"cvb" "Ddpsg:m:o:t:" IF_SELINUX("Z:")
+		"\0"
+		"t--d:d--t:s--d:d--s"
+		IF_FEATURE_INSTALL_LONG_OPTIONS(IF_SELINUX(":Z--\xff:\xff--Z")),
+		LONGOPTS
+		&gid_str, &mode_str, &uid_str, &last
+		IF_SELINUX(, &scontext)
 	);
 	argc -= optind;
 	argv += optind;

coreutils/link.c

@@ -27,8 +27,7 @@
 int link_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int link_main(int argc UNUSED_PARAM, char **argv)
 {
-	opt_complementary = "=2"; /* exactly 2 params */
-	getopt32(argv, "");
+	getopt32(argv, "^" "" "\0" "=2");
 	argv += optind;
 	if (link(argv[0], argv[1]) != 0) {
 		/* shared message */

coreutils/ln.c

@@ -62,8 +62,7 @@ int ln_main(int argc, char **argv)
 	struct stat statbuf;
 	int (*link_func)(const char *, const char *);
 
-	opt_complementary = "-1"; /* min one arg */
-	opts = getopt32(argv, "sfnbS:vT", &suffix);
+	opts = getopt32(argv, "^" "sfnbS:vT" "\0" "-1", &suffix);
 
 	last = argv[argc - 1];
 	argv += optind;

coreutils/ls.c

@@ -206,18 +206,18 @@ SPLIT_SUBDIR    = 2,
 /* -SXvhTw  GNU options, busybox optionally supports */
 /* -T WIDTH Ignored (we don't use tabs on output) */
 /* -Z       SELinux mandated option, busybox optionally supports */
-static const char ls_options[] ALIGN1 =
-	"Cadi1lgnsxAk"       /* 12 opts, total 12 */
-	IF_FEATURE_LS_FILETYPES("Fp")    /* 2, 14 */
-	IF_FEATURE_LS_RECURSIVE("R")     /* 1, 15 */
-	IF_SELINUX("Z")                  /* 1, 16 */
-	"Q"                              /* 1, 17 */
-	IF_FEATURE_LS_TIMESTAMPS("ctu")  /* 3, 20 */
-	IF_FEATURE_LS_SORTFILES("SXrv")  /* 4, 24 */
-	IF_FEATURE_LS_FOLLOWLINKS("LH")  /* 2, 26 */
-	IF_FEATURE_HUMAN_READABLE("h")   /* 1, 27 */
+#define ls_options \
+	"Cadi1lgnsxAk"       /* 12 opts, total 12 */ \
+	IF_FEATURE_LS_FILETYPES("Fp")    /* 2, 14 */ \
+	IF_FEATURE_LS_RECURSIVE("R")     /* 1, 15 */ \
+	IF_SELINUX("Z")                  /* 1, 16 */ \
+	"Q"                              /* 1, 17 */ \
+	IF_FEATURE_LS_TIMESTAMPS("ctu")  /* 3, 20 */ \
+	IF_FEATURE_LS_SORTFILES("SXrv")  /* 4, 24 */ \
+	IF_FEATURE_LS_FOLLOWLINKS("LH")  /* 2, 26 */ \
+	IF_FEATURE_HUMAN_READABLE("h")   /* 1, 27 */ \
 	IF_FEATURE_LS_WIDTH("T:w:")      /* 2, 29 */
-;
+
 enum {
 	OPT_C = (1 << 0),
 	OPT_a = (1 << 1),
@@ -1093,24 +1093,26 @@ int ls_main(int argc UNUSED_PARAM, char **argv)
 #endif
 
 	/* process options */
-	opt_complementary =
-		/* -n and -g imply -l */
-		"nl:gl"
-		/* --full-time implies -l */
-		IF_FEATURE_LS_TIMESTAMPS(IF_LONG_OPTS(":\xff""l"))
-		/* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html:
-		 * in some pairs of opts, only last one takes effect:
-		 */
-		IF_FEATURE_LS_TIMESTAMPS(IF_FEATURE_LS_SORTFILES(":t-S:S-t")) /* time/size */
-		// ":m-l:l-m" - we don't have -m
-		IF_FEATURE_LS_FOLLOWLINKS(":H-L:L-H")
-		":C-xl:x-Cl:l-xC" /* bycols/bylines/long */
-		":C-1:1-C" /* bycols/oneline */
-		":x-1:1-x" /* bylines/oneline (not in SuS, but in GNU coreutils 8.4) */
-		IF_FEATURE_LS_TIMESTAMPS(":c-u:u-c") /* mtime/atime */
-		/* -w NUM: */
-		IF_FEATURE_LS_WIDTH(":w+");
-	opt = getopt32long(argv, ls_options, ls_longopts
+	opt = getopt32long(argv, "^"
+		ls_options
+			"\0"
+			/* -n and -g imply -l */
+			"nl:gl"
+			/* --full-time implies -l */
+			IF_FEATURE_LS_TIMESTAMPS(IF_LONG_OPTS(":\xff""l"))
+			/* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.html:
+			 * in some pairs of opts, only last one takes effect:
+			 */
+			IF_FEATURE_LS_TIMESTAMPS(IF_FEATURE_LS_SORTFILES(":t-S:S-t")) /* time/size */
+			// ":m-l:l-m" - we don't have -m
+			IF_FEATURE_LS_FOLLOWLINKS(":H-L:L-H")
+			":C-xl:x-Cl:l-xC" /* bycols/bylines/long */
+			":C-1:1-C" /* bycols/oneline */
+			":x-1:1-x" /* bylines/oneline (not in SuS, but in GNU coreutils 8.4) */
+			IF_FEATURE_LS_TIMESTAMPS(":c-u:u-c") /* mtime/atime */
+			/* -w NUM: */
+			IF_FEATURE_LS_WIDTH(":w+")
+		, ls_longopts
 		IF_FEATURE_LS_WIDTH(, /*-T*/ NULL, /*-w*/ &G_terminal_width)
 		IF_FEATURE_LS_COLOR(, &color_opt)
 	);

coreutils/md5_sha1_sum.c

@@ -258,15 +258,14 @@ int md5_sha1_sum_main(int argc UNUSED_PARAM, char **argv)
 #endif
 
 	if (ENABLE_FEATURE_MD5_SHA1_SUM_CHECK) {
-		/* -s and -w require -c */
-		opt_complementary = "s?c:w?c";
 		/* -b "binary", -t "text" are ignored (shaNNNsum compat) */
+		/* -s and -w require -c */
 #if ENABLE_SHA3SUM
 		if (applet_name[3] == HASH_SHA3)
-			flags = getopt32(argv, "scwbta:+", &sha3_width);
+			flags = getopt32(argv, "^" "scwbta:+" "\0" "s?c:w?c", &sha3_width);
 		else
 #endif
-			flags = getopt32(argv, "scwbt");
+			flags = getopt32(argv, "^" "scwbt" "\0" "s?c:w?c");
 	} else {
 #if ENABLE_SHA3SUM
 		if (applet_name[3] == HASH_SHA3)

coreutils/mktemp.c

@@ -80,8 +80,7 @@ int mktemp_main(int argc UNUSED_PARAM, char **argv)
 	if (!path || path[0] == '\0')
 		path = "/tmp";
 
-	opt_complementary = "?1"; /* 1 argument max */
-	opts = getopt32(argv, "dqtp:u", &path);
+	opts = getopt32(argv, "^" "dqtp:u" "\0" "?1"/*1 arg max*/, &path);
 
 	chp = argv[optind];
 	if (!chp) {

coreutils/mv.c

@@ -55,8 +55,10 @@ int mv_main(int argc, char **argv)
 	 * If more than one of -f, -i, -n is specified , only the final one
 	 * takes effect (it unsets previous options).
 	 */
-	opt_complementary = "-2:f-in:i-fn:n-fi";
-	flags = getopt32long(argv, "finv",
+	flags = getopt32long(argv, "^"
+			"finv"
+			"\0"
+			"-2:f-in:i-fn:n-fi",
 			"interactive\0" No_argument "i"
 			"force\0"       No_argument "f"
 			"no-clobber\0"  No_argument "n"

coreutils/readlink.c

@@ -71,8 +71,7 @@ int readlink_main(int argc UNUSED_PARAM, char **argv)
 	IF_FEATURE_READLINK_FOLLOW(
 		unsigned opt;
 		/* We need exactly one non-option argument.  */
-		opt_complementary = "=1";
-		opt = getopt32(argv, "fnvsq");
+		opt = getopt32(argv, "^" "fnvsq" "\0" "=1");
 		fname = argv[optind];
 	)
 	IF_NOT_FEATURE_READLINK_FOLLOW(

coreutils/rm.c

@@ -46,8 +46,7 @@ int rm_main(int argc UNUSED_PARAM, char **argv)
 	int flags = 0;
 	unsigned opt;
 
-	opt_complementary = "f-i:i-f";
-	opt = getopt32(argv, "fiRrv");
+	opt = getopt32(argv, "^" "fiRrv" "\0" "f-i:i-f");
 	argv += optind;
 	if (opt & 1)
 		flags |= FILEUTILS_FORCE;

coreutils/shuf.c

@@ -70,8 +70,11 @@ int shuf_main(int argc, char **argv)
 	unsigned numlines;
 	char eol;
 
-	opt_complementary = "e--i:i--e"; /* mutually exclusive */
-	opts = getopt32(argv, OPT_STR, &opt_i_str, &opt_n_str, &opt_o_str);
+	opts = getopt32(argv, "^"
+			OPT_STR
+			"\0" "e--i:i--e"/* mutually exclusive */,
+			&opt_i_str, &opt_n_str, &opt_o_str
+	);
 
 	argc -= optind;
 	argv += optind;

coreutils/sort.c

@@ -94,7 +94,7 @@
 */
 
 /* These are sort types */
-static const char OPT_STR[] ALIGN1 = "ngMucszbrdfimS:T:o:k:*t:";
+#define OPT_STR "ngMucszbrdfimS:T:o:k:*t:"
 enum {
 	FLAG_n  = 1,            /* Numeric sort */
 	FLAG_g  = 2,            /* Sort using strtod() */
@@ -378,9 +378,11 @@ int sort_main(int argc UNUSED_PARAM, char **argv)
 	xfunc_error_retval = 2;
 
 	/* Parse command line options */
-	/* -o and -t can be given at most once */
-	opt_complementary = "o--o:t--t"; /* -t, -o: at most one of each */
-	opts = getopt32(argv, OPT_STR, &str_ignored, &str_ignored, &str_o, &lst_k, &str_t);
+	opts = getopt32(argv, "^"
+			OPT_STR
+			"\0" "o--o:t--t"/*-t, -o: at most one of each*/,
+			&str_ignored, &str_ignored, &str_o, &lst_k, &str_t
+	);
 	/* global b strips leading and trailing spaces */
 	if (opts & FLAG_b)
 		option_mask32 |= FLAG_bb;

coreutils/split.c

@@ -100,8 +100,11 @@ int split_main(int argc UNUSED_PARAM, char **argv)
 
 	setup_common_bufsiz();
 
-	opt_complementary = "?2"; /* max 2 args; -a N */
-	opt = getopt32(argv, "l:b:a:+", &count_p, &count_p, &suffix_len);
+	opt = getopt32(argv, "^"
+			"l:b:a:+" /* -a N */
+			"\0" "?2"/*max 2 args*/,
+			&count_p, &count_p, &suffix_len
+	);
 
 	if (opt & SPLIT_OPT_l)
 		cnt = XATOOFF(count_p);

coreutils/stat.c

@@ -762,11 +762,13 @@ int stat_main(int argc UNUSED_PARAM, char **argv)
 	unsigned opts;
 	statfunc_ptr statfunc = do_stat;
 
-	opt_complementary = "-1"; /* min one arg */
-	opts = getopt32(argv, "tL"
+	opts = getopt32(argv, "^"
+		"tL"
 		IF_FEATURE_STAT_FILESYSTEM("f")
 		IF_SELINUX("Z")
-		IF_FEATURE_STAT_FORMAT("c:", &format)
+		IF_FEATURE_STAT_FORMAT("c:")
+		"\0" "-1" /* min one arg */
+		IF_FEATURE_STAT_FORMAT(,&format)
 	);
 #if ENABLE_FEATURE_STAT_FILESYSTEM
 	if (opts & OPT_FILESYS) /* -f */

coreutils/sync.c

@@ -59,8 +59,7 @@ int sync_main(int argc UNUSED_PARAM, char **argv IF_NOT_DESKTOP(UNUSED_PARAM))
 		OPT_SYNCFS   = (1 << 1),
 	};
 
-	opt_complementary = "d--f:f--d";
-	opts = getopt32(argv, "df");
+	opts = getopt32(argv, "^" "df" "\0" "d--f:f--d");
 	argv += optind;
 
 	/* Handle the no-argument case. */

coreutils/tail.c

@@ -140,9 +140,11 @@ int tail_main(int argc, char **argv)
 #endif
 
 	/* -s NUM, -F imlies -f */
-	IF_FEATURE_FANCY_TAIL(opt_complementary = "Ff";)
-	opt = getopt32(argv, "fc:n:" IF_FEATURE_FANCY_TAIL("qs:+vF"),
-			&str_c, &str_n IF_FEATURE_FANCY_TAIL(,&sleep_period));
+	opt = getopt32(argv, IF_FEATURE_FANCY_TAIL("^")
+			"fc:n:"IF_FEATURE_FANCY_TAIL("qs:+vF")
+			IF_FEATURE_FANCY_TAIL("\0" "Ff"),
+			&str_c, &str_n IF_FEATURE_FANCY_TAIL(,&sleep_period)
+	);
 #define FOLLOW (opt & 0x1)
 #define COUNT_BYTES (opt & 0x2)
 	//if (opt & 0x1) // -f

coreutils/tr.c

@@ -298,8 +298,8 @@ int tr_main(int argc UNUSED_PARAM, char **argv)
 	 * In POSIX locale, these are the same.
 	 */
 
-	opt_complementary = "-1";
-	opts = getopt32(argv, "+Ccds"); /* '+': stop at first non-option */
+	/* '+': stop at first non-option */
+	opts = getopt32(argv, "^+" "Ccds" "\0" "-1");
 	argv += optind;
 
 	str1_length = expand(*argv++, &str1);

coreutils/truncate.c

@@ -50,8 +50,7 @@ int truncate_main(int argc UNUSED_PARAM, char **argv)
 		OPT_SIZE = (1 << 1),
 	};
 
-	opt_complementary = "s:-1";
-	opts = getopt32(argv, "cs:", &size_str);
+	opts = getopt32(argv, "^" "cs:" "\0" "s:-1", &size_str);
 
 	if (!(opts & OPT_NOCREATE))
 		flags |= O_CREAT;

coreutils/unlink.c

@@ -25,8 +25,7 @@
 int unlink_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int unlink_main(int argc UNUSED_PARAM, char **argv)
 {
-	opt_complementary = "=1"; /* must have exactly 1 param */
-	getopt32(argv, "");
+	getopt32(argv, "^" "" "\0" "=1");
 	argv += optind;
 	xunlink(argv[0]);
 	return 0;

coreutils/uudecode.c

@@ -120,8 +120,7 @@ int uudecode_main(int argc UNUSED_PARAM, char **argv)
 	char *outname = NULL;
 	char *line;
 
-	opt_complementary = "?1"; /* 1 argument max */
-	getopt32(argv, "o:", &outname);
+	getopt32(argv, "^" "o:" "\0" "?1"/* 1 arg max*/, &outname);
 	argv += optind;
 
 	if (!argv[0])
@@ -196,8 +195,7 @@ int base64_main(int argc UNUSED_PARAM, char **argv)
 	FILE *src_stream;
 	unsigned opts;
 
-	opt_complementary = "?1"; /* 1 argument max */
-	opts = getopt32(argv, "d");
+	opts = getopt32(argv, "^" "d" "\0" "?1"/* 1 arg max*/);
 	argv += optind;
 
 	if (!argv[0])

coreutils/uuencode.c

@@ -49,8 +49,7 @@ int uuencode_main(int argc UNUSED_PARAM, char **argv)
 
 	tbl = bb_uuenc_tbl_std;
 	mode = 0666 & ~umask(0666);
-	opt_complementary = "-1:?2"; /* must have 1 or 2 args */
-	if (getopt32(argv, "m")) {
+	if (getopt32(argv, "^" "m" "\0" "-1:?2"/*must have 1 or 2 args*/)) {
 		tbl = bb_uuenc_tbl_base64;
 	}
 	argv += optind;

coreutils/who.c

@@ -117,8 +117,7 @@ int who_main(int argc UNUSED_PARAM, char **argv)
 	unsigned opt;
 	const char *fmt = "%s";
 
-	opt_complementary = "=0";
-	opt = getopt32(argv, do_who ? "aH" : "");
+	opt = getopt32(argv, do_who ? "^" "aH" "\0" "=0": "^" "" "\0" "=0");
 	if ((opt & 2) || do_w) /* -H or we are w */
 		puts("USER\t\tTTY\t\tIDLE\tTIME\t\t HOST");
 

debianutils/run_parts.c

@@ -181,8 +181,9 @@ int run_parts_main(int argc UNUSED_PARAM, char **argv)
 	INIT_G();
 
 	/* We require exactly one argument: the directory name */
-	opt_complementary = "=1";
-	GETOPT32(argv, "a:*u:" LONGOPTS, &arg_list, &umask_p);
+	GETOPT32(argv, "^" "a:*u:" "\0" "=1" LONGOPTS,
+			&arg_list, &umask_p
+	);
 
 	umask(xstrtou_range(umask_p, 8, 0, 07777));
 

debianutils/start_stop_daemon.c

@@ -451,15 +451,17 @@ int start_stop_daemon_main(int argc UNUSED_PARAM, char **argv)
 
 	INIT_G();
 
-	/* -K or -S is required; they are mutually exclusive */
-	/* -p is required if -m is given */
-	/* -xpun (at least one) is required if -K is given */
-	/* -xa (at least one) is required if -S is given */
-	/* -q turns off -v */
-	opt_complementary = "K:S:K--S:S--K:m?p:K?xpun:S?xa"
-		IF_FEATURE_START_STOP_DAEMON_FANCY("q-v");
-	opt = GETOPT32(argv, "KSbqtma:n:s:u:c:x:p:"
-		IF_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:"),
+	opt = GETOPT32(argv, "^"
+		"KSbqtma:n:s:u:c:x:p:"
+		IF_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:")
+			/* -K or -S is required; they are mutually exclusive */
+			/* -p is required if -m is given */
+			/* -xpun (at least one) is required if -K is given */
+			/* -xa (at least one) is required if -S is given */
+			/* -q turns off -v */
+			"\0"
+			"K:S:K--S:S--K:m?p:K?xpun:S?xa"
+			IF_FEATURE_START_STOP_DAEMON_FANCY("q-v"),
 		LONGOPTS
 		&startas, &cmdname, &signame, &userspec, &chuid, &execname, &pidfile
 		IF_FEATURE_START_STOP_DAEMON_FANCY(,&opt_N)

debianutils/which.c

@@ -37,8 +37,7 @@ int which_main(int argc UNUSED_PARAM, char **argv)
 	if (!env_path)
 		env_path = bb_default_root_path;
 
-	opt_complementary = "-1"; /* at least one argument */
-	getopt32(argv, "a");
+	getopt32(argv, "^" "a" "\0" "-1"/*at least one arg*/);
 	argv += optind;
 
 	do {

e2fsprogs/tune2fs.c

@@ -71,8 +71,7 @@ int tune2fs_main(int argc UNUSED_PARAM, char **argv)
 	struct ext2_super_block *sb;
 	int fd;
 
-	opt_complementary = "=1";
-	opts = getopt32(argv, "L:c:i:C:", &label, &str_c, &str_i, &str_C);
+	opts = getopt32(argv, "^" "L:c:i:C:" "\0" "=1", &label, &str_c, &str_i, &str_C);
 	if (!opts)
 		bb_show_usage();
 	argv += optind; // argv[0] -- device

editors/cmp.c

@@ -36,7 +36,7 @@ static const char fmt_differ[] ALIGN1 = "%s %s differ: char %"OFF_FMT"u, line %u
 // This fmt_l_opt uses gnu-isms.  SUSv3 would be "%.0s%.0s%"OFF_FMT"u %o %o\n"
 static const char fmt_l_opt[] ALIGN1 = "%.0s%.0s%"OFF_FMT"u %3o %3o\n";
 
-static const char opt_chars[] ALIGN1 = "sl";
+#define OPT_STR "sl"
 #define CMP_OPT_s (1<<0)
 #define CMP_OPT_l (1<<1)
 
@@ -52,11 +52,13 @@ int cmp_main(int argc UNUSED_PARAM, char **argv)
 	unsigned opt;
 	int retval = 0;
 
-	opt_complementary = "-1"
+	opt = getopt32(argv, "^"
+			OPT_STR
+			"\0" "-1"
 			IF_DESKTOP(":?4")
 			IF_NOT_DESKTOP(":?2")
-			":l--s:s--l";
-	opt = getopt32(argv, opt_chars);
+			":l--s:s--l"
+	);
 	argv += optind;
 
 	filename1 = *argv;

editors/diff.c

@@ -984,8 +984,8 @@ int diff_main(int argc UNUSED_PARAM, char **argv)
 	INIT_G();
 
 	/* exactly 2 params; collect multiple -L <label>; -U N */
-	opt_complementary = "=2";
-	GETOPT32(argv, "abdiL:*NqrsS:tTU:+wupBE" LONGOPTS,
+	GETOPT32(argv, "^" "abdiL:*NqrsS:tTU:+wupBE" "\0" "=2"
+			LONGOPTS,
 			&L_arg, &s_start, &opt_U_context);
 	argv += optind;
 	while (L_arg)

editors/sed.c

@@ -1507,13 +1507,15 @@ int sed_main(int argc UNUSED_PARAM, char **argv)
 	/* do normal option parsing */
 	opt_e = opt_f = NULL;
 	opt_i = NULL;
-	opt_complementary = "nn"; /* count -n */
 	/* -i must be first, to match OPT_in_place definition */
 	/* -E is a synonym of -r:
 	 * GNU sed 4.2.1 mentions it in neither --help
 	 * nor manpage, but does recognize it.
 	 */
-	opt = getopt32long(argv, "i::rEne:*f:*", sed_longopts,
+	opt = getopt32long(argv, "^"
+			"i::rEne:*f:*"
+			"\0" "nn"/*count -n*/,
+			sed_longopts,
 			&opt_i, &opt_e, &opt_f,
 			&G.be_quiet); /* counter for -n */
 	//argc -= optind;

findutils/grep.c

@@ -107,6 +107,7 @@
 //usage:#define fgrep_trivial_usage NOUSAGE_STR
 //usage:#define fgrep_full_usage ""
 
+/* -e,-f are lists; -m,-A,-B,-C have numeric param */
 #define OPTSTR_GREP \
 	"lnqvscFiHhe:*f:*Lorm:+wx" \
 	IF_FEATURE_GREP_CONTEXT("A:+B:+C:+") \
@@ -686,11 +687,9 @@ int grep_main(int argc UNUSED_PARAM, char **argv)
 
 	/* do normal option parsing */
 #if ENABLE_FEATURE_GREP_CONTEXT
-	/* -H unsets -h; -C unsets -A,-B; -e,-f are lists;
-	 * -m,-A,-B,-C have numeric param */
-	opt_complementary = "H-h:C-AB";
+	/* -H unsets -h; -C unsets -A,-B */
 	opts = getopt32(argv,
-		OPTSTR_GREP,
+		"^" OPTSTR_GREP "\0" "H-h:C-AB",
 		&pattern_head, &fopt, &max_matches,
 		&lines_after, &lines_before, &Copt);
 
@@ -716,9 +715,7 @@ int grep_main(int argc UNUSED_PARAM, char **argv)
 	}
 #else
 	/* with auto sanity checks */
-	/* -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:";
-	getopt32(argv, OPTSTR_GREP,
+	getopt32(argv, "^" OPTSTR_GREP "\0" "H-h:c-n:q-n:l-n:", // why trailing ":"?
 		&pattern_head, &fopt, &max_matches);
 #endif
 	invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */

include/libbb.h

@@ -1185,9 +1185,6 @@ void make_all_argv_opts(char **argv) FAST_FUNC;
 char* single_argv(char **argv) FAST_FUNC;
 extern const char *const bb_argv_dash[]; /* { "-", NULL } */
 extern uint32_t option_mask32;
-//TODO: get rid of this global variable. How about a trick where optstring can be
-// "^optchars""\0""complementary" (the leading "^" is an indicator)?
-extern const char *opt_complementary;
 uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC;
 # define No_argument "\0"
 # define Required_argument "\001"

libbb/getopt32.c

@@ -96,9 +96,11 @@ getopt32(char **argv, const char *applet_opts, ...)
         env -i ls -d /
         Here we want env to process just the '-i', not the '-d'.
 
- "!"    Report bad option, missing required options,
+ "!"    Report bad options, missing required options,
         inconsistent options with all-ones return value (instead of abort).
 
+ "^"    options string is "^optchars""\0""opt_complementary".
+
 uint32_t
 getopt32long(char **argv, const char *applet_opts, const char *logopts...)
 
@@ -121,7 +123,7 @@ getopt32long(char **argv, const char *applet_opts, const char *logopts...)
         config process and not a required feature.  The current standard
         is to name the config option CONFIG_FEATURE_<applet>_LONG_OPTIONS.
 
-const char *opt_complementary
+opt_complementary - option modifiers.
 
  ":"    The colon (":") is used to separate groups of two or more chars
         and/or groups of chars and special characters (stating some
@@ -132,8 +134,7 @@ const char *opt_complementary
         Their flags will be turned on if the main option is found even
         if they are not specified on the command line.  For example:
 
-        opt_complementary = "abc";
-        flags = getopt32(argv, "abcd")
+        flags = getopt32(argv, "^abcd""\0""abc")
 
         If getopt() finds "-a" on the command line, then
         getopt32's return value will be as if "-a -b -c" were
@@ -146,8 +147,7 @@ const char *opt_complementary
         if w is given more than once, it is "unlimited"
 
         int w_counter = 0; // must be initialized!
-        opt_complementary = "ww";
-        getopt32(argv, "w", &w_counter);
+        getopt32(argv, "^w""\0""ww", &w_counter);
         if (w_counter)
                 width = (w_counter == 1) ? 132 : INT_MAX;
         else
@@ -162,8 +162,9 @@ const char *opt_complementary
 
         llist_t *my_b = NULL;
         int verbose_level = 0;
-        opt_complementary = "vv:b-c:c-b";
-        f = getopt32(argv, "vb:*c", &my_b, &verbose_level);
+        f = getopt32(argv, "^vb:*c"
+			"\0""vv:b-c:c-b"
+			, &my_b, &verbose_level);
         if (f & 2)       // -c after -b unsets -b flag
                 while (my_b) dosomething_with(llist_pop(&my_b));
         if (my_b)        // but llist is stored if -b is specified
@@ -199,7 +200,7 @@ Special characters:
         getopt32 finds -s, then -d is unset or if it finds -d
         then -s is unset.  (Note:  busybox implements the GNU
         "--max-depth" option as "-d".)  To obtain this behavior, you
-        set opt_complementary = "s-d:d-s".  Only one flag value is
+        set opt_complementary to "s-d:d-s".  Only one flag value is
         added to getopt32's return value depending on the
         position of the options on the command line.  If one of the
         two options requires an argument pointer (":" in applet_opts
@@ -207,8 +208,7 @@ Special characters:
 
         char *smax_print_depth;
 
-        opt_complementary = "s-d:d-s:x-x";
-        opt = getopt32(argv, "sd:x", &smax_print_depth);
+        opt = getopt32(argv, "^sd:x""\0""s-d:d-s:x-x", &smax_print_depth);
 
         if (opt & 2)
                 max_print_depth = atoi(smax_print_depth);
@@ -224,7 +224,7 @@ Special characters:
         The cut applet must have only one type of list specified, so
         -b, -c and -f are mutually exclusive and should raise an error
         if specified together.  In this case you must set
-        opt_complementary = "b--cf:c--bf:f--bc".  If two of the
+        opt_complementary to "b--cf:c--bf:f--bc".  If two of the
         mutually exclusive options are found, getopt32 will call
         bb_show_usage() and die.
 
@@ -236,8 +236,7 @@ Special characters:
         with xatoi_positive() - allowed range is 0..INT_MAX.
 
         int param;  // "unsigned param;" will also work
-        opt_complementary = "p+";
-        getopt32(argv, "p:", &param);
+        getopt32(argv, "^p:""\0""p+", &param);
 
  "o::"  A double colon after a char in opt_complementary means that the
         option can occur multiple times. Each occurrence will be saved as
@@ -252,8 +251,7 @@ Special characters:
         (this pointer must be initializated to NULL if the list is empty
         as required by llist_add_to_end(llist_t **old_head, char *new_item).)
 
-        opt_complementary = "e::";
-        getopt32(argv, "e:", &patterns);
+        getopt32(argv, "^e:""\0""e::", &patterns);
 
         $ grep -e user -e root /etc/passwd
         root:x:0:0:root:/root:/bin/bash
@@ -271,8 +269,7 @@ 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";
-        flags = getopt32(argv, "rnug");
+        flags = getopt32(argv, "^rnug""\0""r?ug:n?ug:u--g:g--u");
 
         This example allowed only:
         $ id; id -u; id -g; id -ru; id -nu; id -rg; id -ng; id -rnu; id -rng
@@ -283,8 +280,7 @@ Special characters:
         For example from "start-stop-daemon" applet:
 
         // Don't allow -KS -SK, but -S or -K is required
-        opt_complementary = "K:S:K--S:S--K";
-        flags = getopt32(argv, "KS...);
+        flags = getopt32(argv, "^KS...""\0""K:S:K--S:S--K");
 
 
         Don't forget to use ':'. For example, "?322-22-23X-x-a"
@@ -299,8 +295,6 @@ Special characters:
 
 const char *const bb_argv_dash[] = { "-", NULL };
 
-const char *opt_complementary;
-
 enum {
 	PARAM_STRING,
 	PARAM_LIST,
@@ -337,10 +331,12 @@ vgetopt32(char **argv, const char *applet_opts, const char *applet_long_options,
 	int argc;
 	unsigned flags = 0;
 	unsigned requires = 0;
+	unsigned len;
 	t_complementary complementary[33]; /* last stays zero-filled */
-	char first_char;
+	char dont_die_flag;
 	int c;
 	const unsigned char *s;
+	const char *opt_complementary;
 	t_complementary *on_off;
 #if ENABLE_LONG_OPTS
 	const struct option *l_o;
@@ -349,23 +345,29 @@ vgetopt32(char **argv, const char *applet_opts, const char *applet_long_options,
 	unsigned trigger;
 	int min_arg = 0;
 	int max_arg = -1;
-
-#define SHOW_USAGE_IF_ERROR     1
-
 	int spec_flgs = 0;
 
-	/* skip 0: some applets cheat: they do not actually HAVE argv[0] */
-	argc = 1 + string_array_len(argv + 1);
+#define SHOW_USAGE_IF_ERROR     1
 
 	on_off = complementary;
 	memset(on_off, 0, sizeof(complementary));
 
-	applet_opts = strcpy(alloca(strlen(applet_opts) + 1), applet_opts);
+	len = strlen(applet_opts);
 
 	/* skip bbox extension */
-	first_char = applet_opts[0];
-	if (first_char == '!')
+	opt_complementary = NULL;
+	if (applet_opts[0] == '^') {
 		applet_opts++;
+		/* point it past terminating NUL */
+		opt_complementary = applet_opts + len;
+	}
+
+	/* skip another bbox extension */
+	dont_die_flag = applet_opts[0];
+	if (dont_die_flag == '!')
+		applet_opts++;
+
+	applet_opts = strcpy(alloca(len + 1), applet_opts);
 
 	/* skip GNU extension */
 	s = (const unsigned char *)applet_opts;
@@ -435,7 +437,8 @@ vgetopt32(char **argv, const char *applet_opts, const char *applet_long_options,
 	}
 #endif /* ENABLE_LONG_OPTS */
 
-	for (s = (const unsigned char *)opt_complementary; s && *s; s++) {
+	s = (const unsigned char *)opt_complementary;
+	if (s) for (; *s; s++) {
 		t_complementary *pair;
 		unsigned *pair_switch;
 
@@ -513,8 +516,6 @@ vgetopt32(char **argv, const char *applet_opts, const char *applet_long_options,
 		s--;
 	}
 
-	/* Make it unnecessary to clear it by hand after each getopt32 call */
-	opt_complementary = NULL;
 	/* In case getopt32 was already called:
 	 * reset the libc getopt() function, which keeps internal state.
 	 * run_nofork_applet() does this, but we might end up here
@@ -522,6 +523,9 @@ vgetopt32(char **argv, const char *applet_opts, const char *applet_long_options,
 	 */
 	GETOPT_RESET();
 
+	/* skip 0: some applets cheat: they do not actually HAVE argv[0] */
+	argc = 1 + string_array_len(argv + 1);
+
 	/* Note: just "getopt() <= 0" will not work well for
 	 * "fake" short options, like this one:
 	 * wget $'-\203' "Test: test" http://kernel.org/
@@ -583,7 +587,7 @@ vgetopt32(char **argv, const char *applet_opts, const char *applet_long_options,
 	return flags;
 
  error:
-	if (first_char != '!')
+	if (dont_die_flag != '!')
 		bb_show_usage();
 	return (int32_t)-1;
 }

libbb/parse_config.c

@@ -42,8 +42,9 @@ int parse_main(int argc UNUSED_PARAM, char **argv)
 	int mintokens = 0, ntokens = 128;
 	unsigned noout;
 
-	opt_complementary = "-1";
-	noout = 1 & getopt32(argv, "xn:+m:+d:f:+", &ntokens, &mintokens, &delims, &flags);
+	noout = 1 & getopt32(argv, "^" "xn:+m:+d:f:+" "\0" "-1",
+				&ntokens, &mintokens, &delims, &flags
+	);
 	//argc -= optind;
 	argv += optind;
 

libbb/vfork_daemon_rexec.c

@@ -98,7 +98,6 @@ int FAST_FUNC run_nofork_applet(int applet_no, char **argv)
 	 * (getopt32() does it itself, but getopt() doesn't (and can't))
 	 */
 	GETOPT_RESET();
-	/* opt_complementary = NULL; - cleared by each getopt32() call anyway */
 
 	argc = string_array_len(argv);
 
@@ -123,7 +122,6 @@ int FAST_FUNC run_nofork_applet(int applet_no, char **argv)
 	restore_nofork_data(&old);
 	/* Other globals can be simply reset to defaults */
 	GETOPT_RESET();
-	/* opt_complementary = NULL; - cleared by each getopt32() call anyway */
 
 	return rc & 0xff; /* don't confuse people with "exitcodes" >255 */
 }
@@ -138,7 +136,6 @@ void FAST_FUNC run_noexec_applet_and_exit(int a, const char *name, char **argv)
 	xfunc_error_retval = EXIT_FAILURE;
 	die_func = NULL;
 	GETOPT_RESET();
-	/* opt_complementary = NULL; - cleared by each getopt32() call anyway */
 
 //TODO: think pidof, pgrep, pkill!
 //set_task_comm() makes our pidof find NOEXECs (e.g. "yes >/dev/null"),

loginutils/addgroup.c

@@ -152,11 +152,12 @@ int addgroup_main(int argc UNUSED_PARAM, char **argv)
 	}
 	/* Syntax:
 	 *  addgroup group
-	 *  addgroup -g num group
+	 *  addgroup --gid num group
 	 *  addgroup user group
 	 * Check for min, max and missing args */
-	opt_complementary = "-1:?2";
-	opts = getopt32long(argv, "g:S", addgroup_longopts, &gid);
+	opts = getopt32long(argv, "^" "g:S" "\0" "-1:?2", addgroup_longopts,
+				&gid
+	);
 	/* move past the commandline options */
 	argv += optind;
 	//argc -= optind;

loginutils/adduser.c

@@ -201,12 +201,15 @@ int adduser_main(int argc UNUSED_PARAM, char **argv)
 	pw.pw_shell = (char *)get_shell_name();
 	pw.pw_dir = NULL;
 
-	/* at least one and at most two non-option args */
-	/* disable interactive passwd for system accounts */
-	opt_complementary = "-1:?2:SD";
-	opts = getopt32long(argv, "h:g:s:G:DSHu:k:", adduser_longopts,
+	opts = getopt32long(argv, "^"
+			"h:g:s:G:DSHu:k:"
+			/* at least one and at most two non-option args */
+			/* disable interactive passwd for system accounts */
+			"\0" "-1:?2:SD",
+			adduser_longopts,
 			&pw.pw_dir, &pw.pw_gecos, &pw.pw_shell,
-			&usegroup, &uid, &skel);
+			&usegroup, &uid, &skel
+	);
 	if (opts & OPT_UID)
 		pw.pw_uid = xatou_range(uid, 0, CONFIG_LAST_ID);
 

loginutils/chpasswd.c

@@ -61,8 +61,10 @@ int chpasswd_main(int argc UNUSED_PARAM, char **argv)
 	if (getuid() != 0)
 		bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
 
-	opt_complementary = "m--ec:e--mc:c--em";
-	opt = getopt32long(argv, "emc:", chpasswd_longopts, &algo);
+	opt = getopt32long(argv, "^" "emc:" "\0" "m--ec:e--mc:c--em",
+			chpasswd_longopts,
+			&algo
+	);
 
 	while ((name = xmalloc_fgetline(stdin)) != NULL) {
 		char *free_me;

loginutils/cryptpw.c

@@ -111,9 +111,10 @@ int cryptpw_main(int argc UNUSED_PARAM, char **argv)
 	opt_m = CONFIG_FEATURE_DEFAULT_PASSWD_ALGO;
 	opt_S = NULL;
 	/* at most two non-option arguments; -P NUM */
-	opt_complementary = "?2";
-	getopt32long(argv, "sP:+S:m:a:", mkpasswd_longopts,
-			&fd, &opt_S, &opt_m, &opt_m);
+	getopt32long(argv, "^" "sP:+S:m:a:" "\0" "?2",
+			mkpasswd_longopts,
+			&fd, &opt_S, &opt_m, &opt_m
+	);
 	argv += optind;
 
 	/* have no idea how to handle -s... */

loginutils/getty.c

@@ -131,7 +131,7 @@ struct globals {
 //usage:     "\n"
 //usage:     "\nBAUD_RATE of 0 leaves it unchanged"
 
-static const char opt_string[] ALIGN1 = "I:LH:f:hil:mt:+wn";
+#define OPT_STR "I:LH:f:hil:mt:+wn"
 #define F_INITSTRING    (1 << 0)   /* -I */
 #define F_LOCAL         (1 << 1)   /* -L */
 #define F_FAKEHOST      (1 << 2)   /* -H */
@@ -179,8 +179,7 @@ static void parse_args(char **argv)
 	char *ts;
 	int flags;
 
-	opt_complementary = "-2"; /* at least 2 args; -t N */
-	flags = getopt32(argv, opt_string,
+	flags = getopt32(argv, "^" OPT_STR "\0" "-2"/* at least 2 args*/,
 		&G.initstring, &G.fakehost, &G.issue,
 		&G.login, &G.timeout
 	);

loginutils/vlock.c

@@ -66,8 +66,7 @@ int vlock_main(int argc UNUSED_PARAM, char **argv)
 	struct passwd *pw;
 
 	pw = xgetpwuid(getuid());
-	opt_complementary = "=0"; /* no params! */
-	getopt32(argv, "a");
+	getopt32(argv, "^" "a" "\0" "=0"/* no args!*/);
 
 	/* Ignore some signals so that we don't get killed by them */
 	bb_signals(0

mailutils/popmaildir.c

@@ -125,9 +125,9 @@ int popmaildir_main(int argc UNUSED_PARAM, char **argv)
 	INIT_G();
 
 	// parse options
-	opt_complementary = "-1:dd";
-	opts = getopt32(argv,
-		"bdmVcasTkt:+" "R:+Z:L:+H:+" IF_FEATURE_POPMAILDIR_DELIVERY("M:F:"),
+	opts = getopt32(argv, "^"
+		"bdmVcasTkt:+" "R:+Z:L:+H:+" IF_FEATURE_POPMAILDIR_DELIVERY("M:F:")
+		"\0" "-1:dd",
 		&timeout, NULL, NULL, NULL, &opt_nlines
 		IF_FEATURE_POPMAILDIR_DELIVERY(, &delivery, &delivery) // we treat -M and -F the same
 	);

mailutils/reformime.c

@@ -280,9 +280,9 @@ int reformime_main(int argc UNUSED_PARAM, char **argv)
 
 	// parse options
 	// N.B. only -x and -X are supported so far
-	opt_complementary = "x--X:X--x";
-	opts = getopt32(argv,
-		"x:X" IF_FEATURE_REFORMIME_COMPAT("deis:r:c:m:*h:o:O:"),
+	opts = getopt32(argv, "^"
+		"x:X" IF_FEATURE_REFORMIME_COMPAT("deis:r:c:m:*h:o:O:")
+		"\0" "x--X:X--x",
 		&opt_prefix
 		IF_FEATURE_REFORMIME_COMPAT(, NULL, NULL, &G.opt_charset, NULL, NULL, NULL, NULL)
 	);

mailutils/sendmail.c

@@ -256,13 +256,17 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
 	G.fp0 = xfdopen_for_read(3);
 
 	// parse options
-	// -v is a counter, -H and -S are mutually exclusive, -a is a list
-	opt_complementary = "vv:H--S:S--H";
 	// N.B. since -H and -S are mutually exclusive they do not interfere in opt_connect
 	// -a is for ssmtp (http://downloads.openwrt.org/people/nico/man/man8/ssmtp.8.html) compatibility,
 	// it is still under development.
-	opts = getopt32(argv, "tf:o:iw:+H:S:a:*:v", &opt_from, NULL,
-			&timeout, &opt_connect, &opt_connect, &list, &verbose);
+	opts = getopt32(argv, "^"
+			"tf:o:iw:+H:S:a:*:v"
+			"\0"
+			// -v is a counter, -H and -S are mutually exclusive, -a is a list
+			"vv:H--S:S--H",
+			&opt_from, NULL,
+			&timeout, &opt_connect, &opt_connect, &list, &verbose
+	);
 	//argc -= optind;
 	argv += optind;
 

miscutils/adjtimex.c

@@ -95,9 +95,10 @@ int adjtimex_main(int argc UNUSED_PARAM, char **argv)
 
 	memset(&txc, 0, sizeof(txc));
 
-	opt_complementary = "=0"; /* no valid non-option parameters */
-	opt = getopt32(argv, "qo:f:p:t:",
-			&opt_o, &opt_f, &opt_p, &opt_t);
+	opt = getopt32(argv, "^" "qo:f:p:t:"
+			"\0" "=0"/*no valid non-option args*/,
+			&opt_o, &opt_f, &opt_p, &opt_t
+	);
 	//if (opt & 0x1) // -q
 	if (opt & 0x2) { // -o
 		txc.offset = xatol(opt_o);

miscutils/crond.c

@@ -1021,13 +1021,17 @@ int crond_main(int argc UNUSED_PARAM, char **argv)
 
 	INIT_G();
 
-	/* "-b after -f is ignored", and so on for every pair a-b */
-	opt_complementary = "f-b:b-f:S-L:L-S" IF_FEATURE_CROND_D(":d-l")
+	opts = getopt32(argv, "^"
+			"l:L:fbSc:" IF_FEATURE_CROND_D("d:")
+			"\0"
+			/* "-b after -f is ignored", and so on for every pair a-b */
+			"f-b:b-f:S-L:L-S" IF_FEATURE_CROND_D(":d-l")
 			/* -l and -d have numeric param */
-			":l+" IF_FEATURE_CROND_D(":d+");
-	opts = getopt32(argv, "l:L:fbSc:" IF_FEATURE_CROND_D("d:"),
+			":l+" IF_FEATURE_CROND_D(":d+")
+			,
 			&G.log_level, &G.log_filename, &G.crontab_dir_name
-			IF_FEATURE_CROND_D(,&G.log_level));
+			IF_FEATURE_CROND_D(,&G.log_level)
+	);
 	/* both -d N and -l N set the same variable: G.log_level */
 
 	if (!(opts & OPT_f)) {

miscutils/crontab.c

@@ -99,8 +99,9 @@ int crontab_main(int argc UNUSED_PARAM, char **argv)
 		OPT_ler = OPT_l + OPT_e + OPT_r,
 	};
 
-	opt_complementary = "?1:dr"; /* max one argument; -d implies -r */
-	opt_ler = getopt32(argv, "u:c:lerd", &user_name, &crontab_dir);
+	opt_ler = getopt32(argv, "^" "u:c:lerd" "\0" "?1:dr"/*max one arg; -d implies -r*/,
+				&user_name, &crontab_dir
+	);
 	argv += optind;
 
 	if (sanitize_env_if_suid()) { /* Clears dangerous stuff, sets PATH */

miscutils/flash_eraseall.c

@@ -82,8 +82,7 @@ int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
 	unsigned int flags;
 	char *mtd_name;
 
-	opt_complementary = "=1";
-	flags = getopt32(argv, "jNq");
+	flags = getopt32(argv, "^" "jNq" "\0" "=1");
 
 	mtd_name = argv[optind];
 	fd = xopen(mtd_name, O_RDWR);

miscutils/flashcp.c

@@ -69,8 +69,7 @@ int flashcp_main(int argc UNUSED_PARAM, char **argv)
 	RESERVE_CONFIG_UBUFFER(buf, BUFSIZE);
 	RESERVE_CONFIG_UBUFFER(buf2, BUFSIZE);
 
-	opt_complementary = "=2"; /* exactly 2 non-option args: file, dev */
-	/*opts =*/ getopt32(argv, "v");
+	/*opts =*/ getopt32(argv, "^" "v" "\0" "=2"/*exactly 2 non-option args: file,dev*/);
 	argv += optind;
 //	filename = *argv++;
 //	devicename = *argv;

miscutils/i2c_tools.c

@@ -455,14 +455,12 @@ int i2cget_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int i2cget_main(int argc UNUSED_PARAM, char **argv)
 {
 	const unsigned opt_f = (1 << 0), opt_y = (1 << 1);
-	const char *const optstr = "fy";
 
 	int bus_num, bus_addr, data_addr = -1, status;
 	int mode = I2C_SMBUS_BYTE, pec = 0, fd;
 	unsigned opts;
 
-        opt_complementary = "-2:?4"; /* from 2 to 4 args */
-	opts = getopt32(argv, optstr);
+	opts = getopt32(argv, "^" "fy" "\0" "-2:?4"/*from 2 to 4 args*/);
 	argv += optind;
 
 	bus_num = i2c_bus_lookup(argv[0]);
@@ -544,7 +542,6 @@ int i2cset_main(int argc, char **argv)
 {
 	const unsigned opt_f = (1 << 0), opt_y = (1 << 1),
 			      opt_m = (1 << 2), opt_r = (1 << 3);
-	const char *const optstr = "fym:r";
 
 	int bus_num, bus_addr, data_addr, mode = I2C_SMBUS_BYTE, pec = 0;
 	int val, blen = 0, mask = 0, fd, status;
@@ -552,8 +549,7 @@ int i2cset_main(int argc, char **argv)
 	char *opt_m_arg = NULL;
 	unsigned opts;
 
-        opt_complementary = "-3"; /* from 3 to ? args */
-	opts = getopt32(argv, optstr, &opt_m_arg);
+	opts = getopt32(argv, "^" "fym:r" "\0" "-3"/*from 3 to ? args*/, &opt_m_arg);
 	argv += optind;
 	argc -= optind;
 
@@ -905,7 +901,6 @@ int i2cdump_main(int argc UNUSED_PARAM, char **argv)
 {
 	const unsigned opt_f = (1 << 0), opt_y = (1 << 1),
 			      opt_r = (1 << 2);
-	const char *const optstr = "fyr:";
 
 	int bus_num, bus_addr, mode = I2C_SMBUS_BYTE_DATA, even = 0, pec = 0;
 	unsigned first = 0x00, last = 0xff, opts;
@@ -913,8 +908,11 @@ int i2cdump_main(int argc UNUSED_PARAM, char **argv)
 	char *opt_r_str, *dash;
 	int fd, res;
 
-        opt_complementary = "-2:?3"; /* from 2 to 3 args */
-	opts = getopt32(argv, optstr, &opt_r_str);
+	opts = getopt32(argv, "^"
+		"fyr:"
+		"\0" "-2:?3" /* from 2 to 3 args */,
+		&opt_r_str
+	);
 	argv += optind;
 
 	bus_num = i2c_bus_lookup(argv[0]);
@@ -1208,15 +1206,16 @@ int i2cdetect_main(int argc UNUSED_PARAM, char **argv)
 	const unsigned opt_y = (1 << 0), opt_a = (1 << 1),
 			      opt_q = (1 << 2), opt_r = (1 << 3),
 			      opt_F = (1 << 4), opt_l = (1 << 5);
-	const char *const optstr = "yaqrFl";
 
 	int fd, bus_num, i, j, mode = I2CDETECT_MODE_AUTO, status, cmd;
 	unsigned first = 0x03, last = 0x77, opts;
 	unsigned long funcs;
 
-	opt_complementary = "q--r:r--q:" /* mutually exclusive */
-			"?3"; /* up to 3 args */
-	opts = getopt32(argv, optstr);
+	opts = getopt32(argv, "^"
+			"yaqrFl"
+			"\0"
+			"q--r:r--q:"/*mutually exclusive*/ "?3"/*up to 3 args*/
+	);
 	argv += optind;
 
 	if (opts & opt_l)

miscutils/makedevs.c

@@ -183,8 +183,7 @@ int makedevs_main(int argc UNUSED_PARAM, char **argv)
 	char *line = (char *)"-";
 	int ret = EXIT_SUCCESS;
 
-	opt_complementary = "=1"; /* exactly one param */
-	getopt32(argv, "d:", &line);
+	getopt32(argv, "^" "d:" "\0" "=1", &line);
 	argv += optind;
 
 	xchdir(*argv); /* ensure root dir exists */

miscutils/man.c

@@ -253,8 +253,7 @@ int man_main(int argc UNUSED_PARAM, char **argv)
 
 	INIT_G();
 
-	opt_complementary = "-1"; /* at least one argument */
-	opt = getopt32(argv, "+aw");
+	opt = getopt32(argv, "^+" "aw" "\0" "-1"/*at least one arg*/);
 	argv += optind;
 
 	sec_list = xstrdup("0p:1:1p:2:3:3p:4:5:6:7:8:9");

miscutils/microcom.c

@@ -74,8 +74,9 @@ int microcom_main(int argc UNUSED_PARAM, char **argv)
 	unsigned opts;
 
 	// fetch options
-	opt_complementary = "=1";
-	opts = getopt32(argv, "Xs:+d:+t:+", &speed, &delay, &timeout);
+	opts = getopt32(argv, "^" "Xs:+d:+t:+" "\0" "=1",
+				&speed, &delay, &timeout
+	);
 //	argc -= optind;
 	argv += optind;
 

miscutils/nandwrite.c

@@ -123,13 +123,12 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv)
 	const char *opt_s = "0", *opt_f = "-", *opt_l, *opt_bb;
 
 	if (IS_NANDDUMP) {
-		opt_complementary = "=1";
-		opts = getopt32long(argv, "ons:f:l:",
+		opts = getopt32long(argv, "^" "ons:f:l:" "\0" "=1",
 				"bb\0" Required_argument "\xff", /* no short equivalent */
-				&opt_s, &opt_f, &opt_l, &opt_bb);
+				&opt_s, &opt_f, &opt_l, &opt_bb
+		);
 	} else { /* nandwrite */
-		opt_complementary = "-1:?2";
-		opts = getopt32(argv, "pns:", &opt_s);
+		opts = getopt32(argv, "^" "pns:" "\0" "-1:?2", &opt_s);
 	}
 	argv += optind;
 

miscutils/setserial.c

@@ -742,8 +742,7 @@ int setserial_main(int argc UNUSED_PARAM, char **argv)
 {
 	int opts;
 
-	opt_complementary = "-1:b-aG:G-ab:a-bG";
-	opts = getopt32(argv, "bGavzgq");
+	opts = getopt32(argv, "^" "bGavzgq" "\0" "-1:b-aG:G-ab:a-bG");
 	argv += optind;
 
 	if (!argv[1]) /* one arg only? (nothing to change?) */

miscutils/time.c

@@ -430,9 +430,10 @@ int time_main(int argc UNUSED_PARAM, char **argv)
 		OPT_f = (1 << 4),
 	};
 
-	opt_complementary = "-1"; /* at least one arg */
 	/* "+": stop on first non-option */
-	opt = getopt32(argv, "+vpao:f:", &output_filename, &output_format);
+	opt = getopt32(argv, "^+" "vpao:f:" "\0" "-1"/*at least one arg*/,
+				&output_filename, &output_format
+	);
 	argv += optind;
 	if (opt & OPT_v)
 		output_format = long_format;

miscutils/ubi_tools.c

@@ -145,20 +145,17 @@ int ubi_tools_main(int argc UNUSED_PARAM, char **argv)
 #define OPTION_a  (1 << 5)
 #define OPTION_t  (1 << 6)
 	if (do_mkvol) {
-		opt_complementary = "-1";
-		opts = getopt32(argv, "md:+n:+N:s:a:+t:O:+",
+		opts = getopt32(argv, "^" "md:+n:+N:s:a:+t:O:+" "\0" "-1",
 				&dev_num, &vol_id,
 				&vol_name, &size_bytes_str, &alignment, &type,
 				&vid_hdr_offset
 			);
 	} else
 	if (do_update) {
-		opt_complementary = "-1";
-		opts = getopt32(argv, "s:at", &size_bytes_str);
+		opts = getopt32(argv, "^" "s:at" "\0" "-1", &size_bytes_str);
 		opts *= OPTION_s;
 	} else {
-		opt_complementary = "-1";
-		opts = getopt32(argv, "m:+d:+n:+N:s:a:+t:",
+		opts = getopt32(argv, "^" "m:+d:+n:+N:s:a:+t:" "\0" "-1",
 				&mtd_num, &dev_num, &vol_id,
 				&vol_name, &size_bytes_str, &alignment, &type
 		);

miscutils/watchdog.c

@@ -101,8 +101,9 @@ int watchdog_main(int argc UNUSED_PARAM, char **argv)
 	char *st_arg;
 	char *ht_arg;
 
-	opt_complementary = "=1"; /* must have exactly 1 argument */
-	opts = getopt32(argv, "Ft:T:", &st_arg, &ht_arg);
+	opts = getopt32(argv, "^" "Ft:T:" "\0" "=1"/*must have exactly 1 arg*/,
+				&st_arg, &ht_arg
+	);
 
 	/* We need to daemonize *before* opening the watchdog as many drivers
 	 * will only allow one process at a time to do so.  Since daemonizing

modutils/modinfo.c

@@ -148,8 +148,7 @@ int modinfo_main(int argc UNUSED_PARAM, char **argv)
 	unsigned i;
 
 	field = NULL;
-	opt_complementary = "-1"; /* minimum one param */
-	opts = getopt32(argv, "0F:nadlp", &field);
+	opts = getopt32(argv, "^" "0F:nadlp" "\0" "-1"/*minimum one arg*/, &field);
 	/* If no field selected, show all */
 	if (!(opts & (OPT_TAGS|OPT_F)))
 		option_mask32 |= OPT_TAGS;

modutils/modprobe-small.c

@@ -988,10 +988,9 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
 
 #if ENABLE_MODPROBE || ENABLE_INSMOD || ENABLE_RMMOD
 	/* modprobe, insmod, rmmod require at least one argument */
-	opt_complementary = "-1";
 	/* only -q (quiet) and -r (rmmod),
 	 * the rest are accepted and ignored (compat) */
-	getopt32(argv, "qrfsvwb");
+	getopt32(argv, "^" "qrfsvwb" "\0" "-1");
 	argv += optind;
 
 	if (is_modprobe) {

modutils/modprobe.c

@@ -133,7 +133,7 @@
  */
 #define MODPROBE_OPTS  "alrDb"
 /* -a and -D _are_ in fact compatible */
-#define MODPROBE_COMPLEMENTARY ("q-v:v-q:l--arD:r--alD:a--lr:D--rl")
+#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--arD:r--alD:a--lr:D--rl"
 //#define MODPROBE_OPTS  "acd:lnrt:C:b"
 //#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
 enum {
@@ -566,8 +566,10 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
 
 	INIT_G();
 
-	opt_complementary = MODPROBE_COMPLEMENTARY;
-	opt = getopt32long(argv, INSMOD_OPTS MODPROBE_OPTS, modprobe_longopts INSMOD_ARGS);
+	opt = getopt32long(argv, "^" INSMOD_OPTS MODPROBE_OPTS "\0" MODPROBE_COMPLEMENTARY,
+			modprobe_longopts
+			INSMOD_ARGS
+	);
 	argv += optind;
 
 	/* Goto modules location */

networking/arping.c

@@ -306,9 +306,9 @@ int arping_main(int argc UNUSED_PARAM, char **argv)
 		/* Dad also sets quit_on_reply.
 		 * Advert also sets unsolicited.
 		 */
-		opt_complementary = "=1:Df:AU";
-		opt = getopt32(argv, "DUAqfbc:+w:I:s:",
-				&count, &str_timeout, &device, &source);
+		opt = getopt32(argv, "^" "DUAqfbc:+w:I:s:" "\0" "=1:Df:AU",
+				&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 */

networking/ether-wake.c

@@ -212,8 +212,7 @@ int ether_wake_main(int argc UNUSED_PARAM, char **argv)
 	struct whereto_t whereto;  /* who to wake up */
 
 	/* handle misc user options */
-	opt_complementary = "=1";
-	flags = getopt32(argv, "bi:p:", &ifname, &pass);
+	flags = getopt32(argv, "^" "bi:p:" "\0" "=1", &ifname, &pass);
 	if (flags & 4) /* -p */
 		wol_passwd_sz = get_wol_pw(pass, wol_passwd);
 	flags &= 1; /* we further interested only in -b [bcast] flag */

networking/ftpd.c

@@ -1174,17 +1174,20 @@ int ftpd_main(int argc UNUSED_PARAM, char **argv)
 	abs_timeout = 1 * 60 * 60;
 	verbose_S = 0;
 	G.timeout = 2 * 60;
-	opt_complementary = "vv:SS";
 #if BB_MMU
-	opts = getopt32(argv,    "vS"
-		IF_FEATURE_FTPD_WRITE("w") "t:+T:+" IF_FEATURE_FTPD_AUTHENTICATION("a:"),
+	opts = getopt32(argv, "^"    "vS"
+		IF_FEATURE_FTPD_WRITE("w") "t:+T:+" IF_FEATURE_FTPD_AUTHENTICATION("a:")
+		"\0" "vv:SS",
 		&G.timeout, &abs_timeout, IF_FEATURE_FTPD_AUTHENTICATION(&anon_opt,)
-		&G.verbose, &verbose_S);
+		&G.verbose, &verbose_S
+	);
 #else
-	opts = getopt32(argv, "l1AvS"
-		IF_FEATURE_FTPD_WRITE("w") "t:+T:+" IF_FEATURE_FTPD_AUTHENTICATION("a:"),
+	opts = getopt32(argv, "^" "l1AvS"
+		IF_FEATURE_FTPD_WRITE("w") "t:+T:+" IF_FEATURE_FTPD_AUTHENTICATION("a:")
+		"\0" "vv:SS",
 		&G.timeout, &abs_timeout, IF_FEATURE_FTPD_AUTHENTICATION(&anon_opt,)
-		&G.verbose, &verbose_S);
+		&G.verbose, &verbose_S
+	);
 	if (opts & (OPT_l|OPT_1)) {
 		/* Our secret backdoor to ls */
 		if (fchdir(3) != 0)

networking/ftpgetput.c

@@ -361,11 +361,12 @@ int ftpgetput_main(int argc UNUSED_PARAM, char **argv)
 	/*
 	 * Decipher the command line
 	 */
-	opt_complementary = "-2:vv:cc"; /* must have 2 to 3 params; -v and -c count */
+	/* must have 2 to 3 params; -v and -c count */
+#define OPTSTRING "^cvu:p:P:" "\0" "-2:?3:vv:cc"
 #if ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS
-	getopt32long(argv, "cvu:p:P:", ftpgetput_longopts,
+	getopt32long(argv, OPTSTRING, ftpgetput_longopts,
 #else
-	getopt32(argv, "cvu:p:P:",
+	getopt32(argv, OPTSTRING,
 #endif
 			&user, &password, &port, &verbose_flag, &do_continue
 	);

networking/httpd.c

@@ -2636,17 +2636,19 @@ int httpd_main(int argc UNUSED_PARAM, char **argv)
 #endif
 
 	home_httpd = xrealloc_getcwd_or_warn(NULL);
-	/* -v counts, -i implies -f */
-	opt_complementary = "vv:if";
 	/* We do not "absolutize" path given by -h (home) opt.
 	 * If user gives relative path in -h,
 	 * $SCRIPT_FILENAME will not be set. */
-	opt = getopt32(argv, "c:d:h:"
+	opt = getopt32(argv, "^"
+			"c:d:h:"
 			IF_FEATURE_HTTPD_ENCODE_URL_STR("e:")
 			IF_FEATURE_HTTPD_BASIC_AUTH("r:")
 			IF_FEATURE_HTTPD_AUTH_MD5("m:")
 			IF_FEATURE_HTTPD_SETUID("u:")
-			"p:ifv",
+			"p:ifv"
+			"\0"
+			/* -v counts, -i implies -f */
+			"vv:if",
 			&opt_c_configFile, &url_for_decode, &home_httpd
 			IF_FEATURE_HTTPD_ENCODE_URL_STR(, &url_for_encode)
 			IF_FEATURE_HTTPD_BASIC_AUTH(, &g_realm)

networking/ipcalc.c

@@ -130,8 +130,11 @@ int ipcalc_main(int argc UNUSED_PARAM, char **argv)
 #define ipaddr    (s_ipaddr.s_addr)
 	char *ipstr;
 
-	opt_complementary = "-1:?2"; /* minimum 1 arg, maximum 2 args */
-	opt = GETOPT32(argv, "mbn" IF_FEATURE_IPCALC_FANCY("phs") LONGOPTS);
+	opt = GETOPT32(argv, "^"
+			"mbn" IF_FEATURE_IPCALC_FANCY("phs")
+			"\0" "-1:?2"/*min 1, max 2 args*/
+			LONGOPTS
+	);
 	argv += optind;
 	if (opt & SILENT)
 		logmode = LOGMODE_NONE; /* suppress error_msg() output */

networking/nc_bloaty.c

@@ -787,11 +787,15 @@ int nc_main(int argc UNUSED_PARAM, char **argv)
  e_found:
 
 	// -g -G -t -r deleted, unimplemented -a deleted too
-	opt_complementary = "?2:vv:ll"; /* max 2 params; -v and -l are counters; -w N */
-	getopt32(argv, "np:s:uvw:+" IF_NC_SERVER("lk")
-			IF_NC_EXTRA("i:o:z"),
-			&str_p, &str_s, &o_wait
-			IF_NC_EXTRA(, &str_i, &str_o), &o_verbose IF_NC_SERVER(, &cnt_l));
+	getopt32(argv, "^"
+		"np:s:uvw:+"/* -w N */ IF_NC_SERVER("lk")
+		IF_NC_EXTRA("i:o:z")
+			"\0"
+			"?2:vv:ll", /* max 2 params; -v and -l are counters */
+		&str_p, &str_s, &o_wait
+		IF_NC_EXTRA(, &str_i, &str_o)
+			, &o_verbose IF_NC_SERVER(, &cnt_l)
+	);
 	argv += optind;
 #if ENABLE_NC_EXTRA
 	if (option_mask32 & OPT_i) /* line-interval time */

networking/ntpd.c

@@ -2230,15 +2230,16 @@ static NOINLINE void ntp_init(char **argv)
 
 	/* Parse options */
 	peers = NULL;
-	opt_complementary = "dd:wn"  /* -d: counter; -p: list; -w implies -n */
-		IF_FEATURE_NTPD_SERVER(":Il"); /* -I implies -l */
-	opts = getopt32(argv,
+	opts = getopt32(argv, "^"
 			"nqNx" /* compat */
 			"wp:*S:"IF_FEATURE_NTPD_SERVER("l") /* NOT compat */
 			IF_FEATURE_NTPD_SERVER("I:") /* compat */
 			"d" /* compat */
 			"46aAbgL", /* compat, ignored */
-			&peers, &G.script_name,
+				"\0"
+				"dd:wn"  /* -d: counter; -p: list; -w implies -n */
+				IF_FEATURE_NTPD_SERVER(":Il") /* -I implies -l */
+			, &peers, &G.script_name,
 #if ENABLE_FEATURE_NTPD_SERVER
 			&G.if_name,
 #endif

networking/ping.c

@@ -340,7 +340,8 @@ static int common_ping_main(sa_family_t af, char **argv)
 
 /* Full(er) version */
 
-#define OPT_STRING ("qvc:+s:t:+w:+W:+I:np:4" IF_PING6("6"))
+/* -c NUM, -t NUM, -w NUM, -W NUM */
+#define OPT_STRING "qvc:+s:t:+w:+W:+I:np:4"IF_PING6("6")
 enum {
 	OPT_QUIET = 1 << 0,
 	OPT_VERBOSE = 1 << 1,
@@ -863,9 +864,12 @@ static int common_ping_main(int opt, char **argv)
 
 	INIT_G();
 
-	/* exactly one argument needed; -v and -q don't mix; -c NUM, -t NUM, -w NUM, -W NUM */
-	opt_complementary = "=1:q--v:v--q";
-	opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I, &str_p);
+	opt |= getopt32(argv, "^"
+			OPT_STRING
+			/* exactly one arg; -v and -q don't mix */
+			"\0" "=1:q--v:v--q",
+			&pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I, &str_p
+	);
 	if (opt & OPT_s)
 		datalen = xatou16(str_s); // -s
 	if (opt & OPT_I) { // -I

networking/pscan.c

@@ -75,8 +75,11 @@ int pscan_main(int argc UNUSED_PARAM, char **argv)
 	unsigned rtt_4;
 	unsigned start, diff;
 
-	opt_complementary = "=1"; /* exactly one non-option */
-	opt = getopt32(argv, "cbp:P:t:T:", &opt_min_port, &opt_max_port, &opt_timeout, &opt_min_rtt);
+	opt = getopt32(argv, "^"
+		"cbp:P:t:T:"
+		"\0" "=1", /* exactly one non-option */
+		&opt_min_port, &opt_max_port, &opt_timeout, &opt_min_rtt
+	);
 	argv += optind;
 	max_port = xatou_range(opt_max_port, 1, 65535);
 	port = xatou_range(opt_min_port, 1, max_port);

networking/slattach.c

@@ -128,8 +128,9 @@ int slattach_main(int argc UNUSED_PARAM, char **argv)
 	INIT_G();
 
 	/* Parse command line options */
-	opt_complementary = "=1";
-	opt = getopt32(argv, "p:s:c:ehmLF", &proto, &baud_str, &extcmd);
+	opt = getopt32(argv, "^" "p:s:c:ehmLF" "\0" "=1",
+				&proto, &baud_str, &extcmd
+	);
 	/*argc -= optind;*/
 	argv += optind;
 

networking/tcpudp.c

@@ -269,10 +269,11 @@ int tcpudpsvd_main(int argc UNUSED_PARAM, char **argv)
 
 	tcp = (applet_name[0] == 't');
 
-	/* 3+ args, -i at most once, -p implies -h, -v is counter, -b N, -c N */
-	opt_complementary = "-3:i--i:ph:vv";
 #ifdef SSLSVD
-	opts = getopt32(argv, "+c:+C:i:x:u:l:Eb:+hpt:vU:/:Z:K:",
+	opts = getopt32(argv, "^+"
+		"c:+C:i:x:u:l:Eb:+hpt:vU:/:Z:K:" /* -c NUM, -b NUM */
+		/* 3+ args, -i at most once, -p implies -h, -v is a counter */
+		"\0" "-3:i--i:ph:vv",
 		&cmax, &str_C, &instructs, &instructs, &user, &preset_local_hostname,
 		&backlog, &str_t, &ssluser, &root, &cert, &key, &verbose
 	);

networking/telnetd.c

@@ -659,13 +659,15 @@ int telnetd_main(int argc UNUSED_PARAM, char **argv)
 #endif
 	INIT_G();
 
-	/* -w NUM, and implies -F. -w and -i don't mix */
-	IF_FEATURE_TELNETD_INETD_WAIT(opt_complementary = "wF:i--w:w--i";)
 	/* Even if !STANDALONE, we accept (and ignore) -i, thus people
 	 * don't need to guess whether it's ok to pass -i to us */
-	opt = getopt32(argv, "f:l:Ki"
+	opt = getopt32(argv, "^"
+			"f:l:Ki"
 			IF_FEATURE_TELNETD_STANDALONE("p:b:F")
-			IF_FEATURE_TELNETD_INETD_WAIT("Sw:+"),
+			IF_FEATURE_TELNETD_INETD_WAIT("Sw:+") /* -w NUM */
+			"\0"
+			/* -w implies -F. -w and -i don't mix */
+			IF_FEATURE_TELNETD_INETD_WAIT("wF:i--w:w--i"),
 			&G.issuefile, &G.loginpath
 			IF_FEATURE_TELNETD_STANDALONE(, &opt_portnbr, &opt_bindaddr)
 			IF_FEATURE_TELNETD_INETD_WAIT(, &sec_linger)

networking/tftp.c

@@ -761,15 +761,16 @@ int tftp_main(int argc UNUSED_PARAM, char **argv)
 
 	INIT_G();
 
-	/* -p or -g is mandatory, and they are mutually exclusive */
-	opt_complementary = "" IF_FEATURE_TFTP_GET("g:") IF_FEATURE_TFTP_PUT("p:")
-			IF_GETPUT("g--p:p--g:");
-
-	IF_GETPUT(opt =) getopt32(argv,
+	IF_GETPUT(opt =) getopt32(argv, "^"
 			IF_FEATURE_TFTP_GET("g") IF_FEATURE_TFTP_PUT("p")
-				"l:r:" IF_FEATURE_TFTP_BLOCKSIZE("b:"),
+			"l:r:" IF_FEATURE_TFTP_BLOCKSIZE("b:")
+			"\0"
+			/* -p or -g is mandatory, and they are mutually exclusive */
+			IF_FEATURE_TFTP_GET("g:") IF_FEATURE_TFTP_PUT("p:")
+			IF_GETPUT("g--p:p--g:"),
 			&local_file, &remote_file
-			IF_FEATURE_TFTP_BLOCKSIZE(, &blksize_str));
+			IF_FEATURE_TFTP_BLOCKSIZE(, &blksize_str)
+	);
 	argv += optind;
 
 # if ENABLE_FEATURE_TFTP_BLOCKSIZE

networking/traceroute.c

@@ -833,9 +833,9 @@ common_traceroute_main(int op, char **argv)
 
 	INIT_G();
 
-	/* minimum 1 arg */
-	opt_complementary = "-1:x-x";
-	op |= getopt32(argv, OPT_STRING
+	op |= getopt32(argv, "^"
+		OPT_STRING
+		"\0" "-1:x-x" /* minimum 1 arg */
 		, &tos_str, &device, &max_ttl_str, &port_str, &nprobes_str
 		, &source, &waittime_str, &pausemsecs_str, &first_ttl_str
 	);

networking/tunctl.c

@@ -83,10 +83,13 @@ int tunctl_main(int argc UNUSED_PARAM, char **argv)
 #endif
 	};
 
-	opt_complementary = "=0:t--d:d--t"; // no arguments; t ^ d
-	opts = getopt32(argv, "f:t:d:" IF_FEATURE_TUNCTL_UG("u:g:b"),
+	opts = getopt32(argv, "^"
+			"f:t:d:" IF_FEATURE_TUNCTL_UG("u:g:b")
+			"\0"
+			"=0:t--d:d--t", // no arguments; t ^ d
 			&opt_device, &opt_name, &opt_name
-			IF_FEATURE_TUNCTL_UG(, &opt_user, &opt_group));
+			IF_FEATURE_TUNCTL_UG(, &opt_user, &opt_group)
+	);
 
 	// select device
 	memset(&ifr, 0, sizeof(ifr));
@@ -153,9 +156,12 @@ int tunctl_main(int argc UNUSED_PARAM, char **argv)
 		OPT_d = 1 << 2, // delete named interface
 	};
 
-	opt_complementary = "=0:t--d:d--t"; // no arguments; t ^ d
-	opts = getopt32(argv, "f:t:d:u:g:b", // u, g, b accepted and ignored
-			&opt_device, &opt_name, &opt_name, NULL, NULL);
+	opts = getopt32(argv, "^"
+			"f:t:d:u:g:b" // u, g, b accepted and ignored
+			"\0"
+			"=0:t--d:d--t", // no arguments; t ^ d
+			&opt_device, &opt_name, &opt_name, NULL, NULL
+	);
 
 	// set interface name
 	memset(&ifr, 0, sizeof(ifr));

networking/udhcp/d6_dhcpc.c

@@ -1101,13 +1101,14 @@ int udhcpc6_main(int argc UNUSED_PARAM, char **argv)
 	client_config.script = CONFIG_UDHCPC_DEFAULT_SCRIPT;
 
 	/* Parse command line */
-	/* O,x: list; -T,-t,-A take numeric param */
-	IF_UDHCP_VERBOSE(opt_complementary = "vv";)
-	opt = getopt32long(argv, "i:np:qRr:s:T:+t:+SA:+O:*ox:*f"
+	opt = getopt32long(argv, "^"
+		/* O,x: list; -T,-t,-A take numeric param */
+		"i:np:qRr:s:T:+t:+SA:+O:*ox:*f"
 		USE_FOR_MMU("b")
 		///IF_FEATURE_UDHCPC_ARPING("a")
 		IF_FEATURE_UDHCP_PORT("P:")
 		"v"
+		"\0" IF_UDHCP_VERBOSE("vv") /* -v is a counter */
 		, udhcpc6_longopts
 		, &client_config.interface, &client_config.pidfile, &str_r /* i,p */
 		, &client_config.script /* s */

networking/udhcp/dhcpc.c

@@ -1295,16 +1295,18 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
 	str_V = "udhcp "BB_VER;
 
 	/* Parse command line */
-	/* O,x: list; -T,-t,-A take numeric param */
-	IF_UDHCP_VERBOSE(opt_complementary = "vv";)
-	opt = getopt32long(argv, "CV:H:h:F:i:np:qRr:s:T:+t:+SA:+O:*ox:*fB"
+	opt = getopt32long(argv, "^"
+		/* O,x: list; -T,-t,-A take numeric param */
+		"CV:H:h:F:i:np:qRr:s:T:+t:+SA:+O:*ox:*fB"
 		USE_FOR_MMU("b")
 		IF_FEATURE_UDHCPC_ARPING("a::")
 		IF_FEATURE_UDHCP_PORT("P:")
 		"v"
+		"\0" IF_UDHCP_VERBOSE("vv") /* -v is a counter */
 		, udhcpc_longopts
 		, &str_V, &str_h, &str_h, &str_F
-		, &client_config.interface, &client_config.pidfile, &str_r /* i,p */
+		, &client_config.interface, &client_config.pidfile /* i,p */
+		, &str_r /* r */
 		, &client_config.script /* s */
 		, &discover_timeout, &discover_retries, &tryagain_timeout /* T,t,A */
 		, &list_O

networking/udhcp/dhcpd.c

@@ -814,11 +814,12 @@ int udhcpd_main(int argc UNUSED_PARAM, char **argv)
 	IF_FEATURE_UDHCP_PORT(SERVER_PORT = 67;)
 	IF_FEATURE_UDHCP_PORT(CLIENT_PORT = 68;)
 
+	opt = getopt32(argv, "^"
+		"fSI:va:"IF_FEATURE_UDHCP_PORT("P:")
+		"\0"
 #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
-	opt_complementary = "vv";
+		"vv"
 #endif
-	opt = getopt32(argv, "fSI:va:"
-		IF_FEATURE_UDHCP_PORT("P:")
 		, &str_I
 		, &str_a
 		IF_FEATURE_UDHCP_PORT(, &str_P)

networking/udhcp/dumpleases.c

@@ -54,8 +54,12 @@ int dumpleases_main(int argc UNUSED_PARAM, char **argv)
 #endif
 	init_unicode();
 
-	opt_complementary = "=0:a--r:r--a";
-	opt = getopt32long(argv, "arf:d", dumpleases_longopts, &file);
+	opt = getopt32long(argv, "^"
+			"arf:d"
+			"\0" "=0:a--r:r--a",
+			dumpleases_longopts,
+			&file
+	);
 
 	fd = xopen(file, O_RDONLY);
 

networking/wget.c

@@ -1387,9 +1387,8 @@ IF_DESKTOP(	"no-parent\0"        No_argument       "\xf0")
 
 #if ENABLE_FEATURE_WGET_LONG_OPTIONS
 #endif
-	opt_complementary = "-1" /* at least one URL */
-		IF_FEATURE_WGET_LONG_OPTIONS(":\xff::"); /* --header is a list */
-	GETOPT32(argv, "cqSO:P:Y:U:T:+"
+	GETOPT32(argv, "^"
+		"cqSO:P:Y:U:T:+"
 		/*ignored:*/ "t:"
 		/*ignored:*/ "n::"
 		/* wget has exactly four -n<letter> opts, all of which we can ignore:
@@ -1400,6 +1399,9 @@ IF_DESKTOP(	"no-parent\0"        No_argument       "\xf0")
 		 * "n::" above says that we accept -n[ARG].
 		 * Specifying "n:" would be a bug: "-n ARG" would eat ARG!
 		 */
+		"\0"
+		"-1" /* at least one URL */
+		IF_FEATURE_WGET_LONG_OPTIONS(":\xff::") /* --header is a list */
 		LONGOPTS
 		, &G.fname_out, &G.dir_prefix,
 		&G.proxy_flag, &G.user_agent,

networking/whois.c

@@ -167,8 +167,7 @@ int whois_main(int argc UNUSED_PARAM, char **argv)
 	int port = 43;
 	const char *host = "whois.iana.org";
 
-	opt_complementary = "-1";
-	getopt32(argv, "ih:p:+", &host, &port);
+	getopt32(argv, "^" "ih:p:+" "\0" "-1", &host, &port);
 	argv += optind;
 
 	do {