diff --git a/CHANGES b/CHANGES
index df2cfc3..3251e53 100644
--- a/CHANGES
+++ b/CHANGES
@@ -166,6 +166,10 @@ Corrections:
 	by Socat. Now an error is printed when, e.g,, a read-only type address
 	is opened for writing.
 
+	A lot of minor corrections, e.g., catch readline() errors in filan,
+	detect byte order in procan
+	Test: EXEC_SIGINT
+
 Coding:
 	Introduced groups_t instead of uint32_t, for more flexibility.
 
diff --git a/configure.ac b/configure.ac
index adff4c5..90362c0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -328,26 +328,6 @@ AC_ARG_ENABLE(interface, [  --disable-interface  disable network interface suppo
 	       *) AC_MSG_RESULT(yes); WITH_INTERFACE=1 ;;
 	       esac],
 	       [AC_MSG_RESULT(yes);  WITH_INTERFACE=1 ])
-if test "$WITH_INTERFACE"; then
-  AC_CHECK_HEADER(linux/if_packet.h,
-    AC_DEFINE(HAVE_LINUX_IF_PACKET_H),
-    [WITH_INTERFACE=;
-     AC_MSG_WARN([include file linux/if_packet.h not found, disabling interface])])
-fi
-if test "$WITH_INTERFACE"; then
-  AC_CHECK_HEADER(netinet/if_ether.h,
-    AC_DEFINE(HAVE_NETINET_IF_ETHER_H),
-    [WITH_INTERFACE=;
-     AC_MSG_WARN([include file netinet/if_ether.h not found, disabling interface])],
-     [AC_INCLUDES_DEFAULT
-     #if HAVE_NET_IF_H && HAVE_NETINET_IN_H
-     #include <net/if.h>
-     #include <netinet/in.h>
-     #endif])
-fi
-if test "$WITH_INTERFACE"; then
-   AC_DEFINE(WITH_INTERFACE)
-fi
 
 AC_MSG_CHECKING(whether to include TCP support)
 AC_ARG_ENABLE(tcp, [  --disable-tcp           disable TCP support],
@@ -835,6 +815,28 @@ if test -n "$WITH_TUN"; then
   AC_DEFINE(WITH_TUN)
 fi
 
+if test "$WITH_INTERFACE"; then
+  AC_CHECK_HEADER(netinet/if_ether.h,
+    AC_DEFINE(HAVE_NETINET_IF_ETHER_H),
+    [WITH_INTERFACE=;
+     AC_MSG_WARN([include file netinet/if_ether.h not found, disabling interface])],
+     [AC_INCLUDES_DEFAULT
+     #if HAVE_NET_IF_H && HAVE_NETINET_IN_H
+     #include <net/if.h>
+     #include <netinet/in.h>
+     #endif])
+fi
+
+if test "$WITH_INTERFACE" || test "$WITH_TUN"; then
+  AC_CHECK_HEADER(linux/if_packet.h,
+    AC_DEFINE(HAVE_LINUX_IF_PACKET_H),
+    [WITH_INTERFACE=;
+     AC_MSG_WARN([include file linux/if_packet.h not found, disabling interface])])
+fi
+if test "$WITH_INTERFACE"; then
+   AC_DEFINE(WITH_INTERFACE)
+fi
+
 AC_MSG_CHECKING(whether to include system call tracing)
 AC_ARG_ENABLE(sycls, [  --disable-sycls         disable system call tracing],
 	      [case "$enableval" in
diff --git a/filan.c b/filan.c
index 18b2bf4..26f4668 100644
--- a/filan.c
+++ b/filan.c
@@ -412,8 +412,12 @@ int filan_stat(
 	{
 	   char linktarget[PATH_MAX+1];
 	   memset(linktarget, 0, PATH_MAX+1);
-	   Readlink(filename, linktarget, PATH_MAX);
-	   fprintf(outfile, "LINKTARGET=%s", linktarget);
+	   if (Readlink(filename, linktarget, PATH_MAX) < 0) {
+	      Warn3("readlink(\"%s\", linktarget, %d): %s",
+		    filename, PATH_MAX, strerror(errno));
+	   } else {
+	      fprintf(outfile, "LINKTARGET=%s", linktarget);
+	   }
 	}
 	break;
 #endif /* S_IFLNK */
diff --git a/hostan.c b/hostan.c
index 07212af..74d3dbd 100644
--- a/hostan.c
+++ b/hostan.c
@@ -32,6 +32,23 @@ int hostan(FILE *outfile) {
    fprintf(outfile, "sizeof(long long) = %u\n", (unsigned int)sizeof(long long));
 #endif
    fprintf(outfile, "sizeof(size_t)    = %u\n", (unsigned int)sizeof(size_t));
+   {
+      union {
+	 uint16_t s;
+	 uint8_t c[2];
+      } bo;
+      bo.c[0] = 0x05;
+      bo.c[1] = 0xa0;
+      if (bo.s == 0x05a0) {
+	 fprintf(outfile, "host byte order: network (BE \"big endian\", most significast byte first)\n");
+      } else if (bo.s == 0xa005) {
+	 fprintf(outfile, "host byte order: intel (LE \"little endian\", least significast byte first\n");
+      } else {
+	 fprintf(outfile, "host byte order: unknown\n");
+	 fprintf(stderr, "failed to determine host byte order");
+      }
+   }
+
 #include <sys/time.h>	/* select(); OpenBSD: struct timespec */
    fprintf(outfile, "sizeof(struct timespec)      = %u\n", (unsigned int)sizeof(struct timespec));
    fprintf(outfile, "sizeof(struct diag_dgram)      = %u\n", (unsigned int)sizeof(struct diag_dgram));
diff --git a/socat.c b/socat.c
index f8ea83d..864415b 100644
--- a/socat.c
+++ b/socat.c
@@ -399,12 +399,14 @@ int main(int argc, const char *argv[]) {
 	 }
       }
 
+#if WITH_STATS
 #if HAVE_SIGACTION
       act.sa_handler = socat_signal_logstats;
       Sigaction(SIGUSR1, &act, NULL);
 #else
       Signal(SIGUSR1, socat_signal_logstats);
 #endif
+#endif /* WITH_STATS */
    }
    Signal(SIGPIPE, SIG_IGN);
 
@@ -419,9 +421,11 @@ int main(int argc, const char *argv[]) {
    }
 
    Atexit(socat_unlock);
+#if WITH_STATS
    if (socat_opts.statistics) {
       Atexit(socat_print_stats);
    }
+#endif /* WITH_STATS */
 
    result = socat(arg1[0], arg1[1]);
    if (result == EXIT_SUCCESS && engine_result != EXIT_SUCCESS) {
diff --git a/socat.spec b/socat.spec
index 90f7309..caaab79 100644
--- a/socat.spec
+++ b/socat.spec
@@ -49,6 +49,7 @@ rm -rf $RPM_BUILD_ROOT
 %doc README CHANGES EXAMPLES SECURITY doc/socat.html FAQ BUGREPORTS
 %doc COPYING COPYING.OpenSSL FILES PORTING DEVELOPMENT
 %{_bindir}/socat1
+%{_bindir}/socat
 %{_bindir}/procan
 %{_bindir}/filan
 %{_mandir}/man1/socat1.1
diff --git a/sysutils.h b/sysutils.h
index e84df00..5e8ae10 100644
--- a/sysutils.h
+++ b/sysutils.h
@@ -30,7 +30,7 @@ union sockaddr_union {
 #if WITH_VSOCK
    struct sockaddr_vm vm;
 #endif /* WITH_IP6 */
-#if WITH_INTERFACE
+#if _WITH_INTERFACE
    struct sockaddr_ll ll;
 #endif
 } ;
diff --git a/test.sh b/test.sh
index 2225f3c..df336a6 100755
--- a/test.sh
+++ b/test.sh
@@ -71,7 +71,7 @@ while [ "$1" ]; do
 	X-N?*) NUMCOND="test \$N -gt ${1#-N}" ;;
 	X-N)   shift; NUMCOND="test \$N -ge $1" ;;
 	X-C)   rm -f testcert*.conf testcert.dh testcli*.* testsrv*.* ;;
-	X-foreign)	FOREIGN=1 ;; 	# allow access to 3rd party Internet hosts
+	X-foreign|X--foreign)	FOREIGN=1 ;; 	# allow access to 3rd party Internet hosts
 	X-expect-fail|X--expect-fail) OPT_EXPECT_FAIL=1; shift; EXPECT_FAIL="$1" ;;
 	X-*)   echo "Unknown option \"$1\"" >&2
                usage >&2
@@ -136,6 +136,22 @@ if [ -z "$SOCAT_VERSION" ]; then
     echo "Warning: failed to retrieve Socat version" >&2
 fi
 
+if type ip >/dev/null 2>&1; then
+    if ip -V |grep -q -i -e "^ip utility, iproute2-" -e BusyBox; then
+	IP=$(type -p ip)
+    else
+	unset IP
+    fi
+fi
+
+if type ss >/dev/null 2>&1; then
+    if ss -V |grep -q "^ss utility, iproute2-"; then
+	SS=$(type -p ss)
+    else
+	unset SS
+    fi
+fi
+
 # for some tests we need a network interface
 if type ip >/dev/null 2>&1; then
     INTERFACE=$(ip r get 8.8.8.8 |grep ' dev ' |head -n 1 |sed "s/.*dev[[:space:]][[:space:]]*\([^[:space:]][^[:space:]]*\).*/\1/")
@@ -354,22 +370,6 @@ else
     SUBSTUSER="$(grep -v '^[^:]*:^[^:]*:0:' /etc/passwd |tail -n 1 |cut -d: -f1)"
 fi
 
-if type ip >/dev/null 2>&1; then
-    if ip -V |grep -q "^ip utility, iproute2-"; then
-	IP=$(type -p ip)
-    else
-	unset IP
-    fi
-fi
-
-if type ss >/dev/null 2>&1; then
-    if ss -V |grep -q "^ss utility, iproute2-"; then
-	SS=$(type -p ss)
-    else
-	unset SS
-    fi
-fi
-
 if [ -z "$SS" ]; then
 # non-root users might miss ifconfig in their path
 case "$UNAME" in
@@ -4458,7 +4458,7 @@ N=$((N+1))
 NAME=READLINE
 #set -vx
 case "$TESTS" in
-*%$N%*|*%functions%*|*%pty%*|*%readline%*|*%$NAME%*)
+*%$N%*|*%functions%*|*%pty%*|*%readline%*|*%sigint%*|*%$NAME%*)
 TEST="$NAME: readline with password and sigint"
 if ! eval $NUMCOND; then :;
 elif ! feat=$(testfeats readline pty); then
@@ -8462,23 +8462,27 @@ kill "$pid1" 2>/dev/null; wait;
 if [ "$rc2" -ne 0 ]; then
     $PRINTF "$FAILED: $TRACE $SOCAT:\n"
     echo "$CMD1 &"
+    cat "${te}1" >&2
     echo "$CMD2"
-    cat "${te}1"
-    cat "${te}2"
+    cat "${te}2" >&2
     numFAIL=$((numFAIL+1))
     listFAIL="$listFAIL $N"
 elif ! echo "$da" |diff - "$tf" >"$tdiff"; then
     $PRINTF "$FAILED\n"
-    cat "$tdiff"
+    echo "$CMD1 &"
+    cat "${te}1" >&2
+    echo "$CMD2"
+    cat "${te}2" >&2
+    echo diff: >&2
+    cat "$tdiff" >&2
     numFAIL=$((numFAIL+1))
     listFAIL="$listFAIL $N"
 else
     $PRINTF "$OK\n"
-    if [ -n "$VERBOSE" ]; then
-	echo "$CMD1 &"
-	echo "$CMD2"
-    fi
-    if [ -n "$debug" ]; then cat $te; fi
+    if [ "$VERBOSE" ]; then echo "$CMD1 &"; fi
+    if [ "$DEBUG" ];   then cat "${te}1" >&2; fi
+    if [ "$VERBOSE" ]; then echo "$CMD2"; fi
+    if [ "$DEBUG" ];   then cat "${te}2" >&2; fi
     numOK=$((numOK+1))
 fi
 fi ;; # NUMCOND
@@ -14751,6 +14755,7 @@ TEST="$NAME: UDP4-SEND with lowport"
 # succeeded.
 # This test does not require root because it just checks log of bind() but does
 # not require success
+# This test fails if WITH_SYCLS is turned off
 if ! eval $NUMCOND; then :; else
 tf="$td/test$N.stdout"
 te="$td/test$N.stderr"
@@ -14766,13 +14771,18 @@ LOWPORT=$(grep '[DE] bind(.*:' $te |sed 's/.*:\([0-9][0-9]*\)[}]*,.*/\1/' |head
 #type socat >&2
 if  [[ $LOWPORT =~ [0-9][0-9]* ]] && [ "$LOWPORT" -ge 640 -a "$LOWPORT" -le 1023 ]; then
     $PRINTF "$OK\n"
-    if [ "$VERBOSE" ]; then
-	echo "$CMD" >&2
-    fi
+    if [ "$VERBOSE" ]; then echo "$CMD0 &"; fi
+    if [ "$DEBUG" ];   then cat "${te}0" >&2; fi
     numOK=$((numOK+1))
+elif $SOCAT -V |grep -q "undef WITH_SYCLS"; then
+    $PRINTF "$CANT (no SYCLS)\n"
+    if [ "$VERBOSE" ]; then echo "$CMD0 &"; fi
+    if [ "$DEBUG" ];   then cat "${te}0" >&2; fi
+    numCANT=$((numCANT+1))
+    listCANT="$listCANT $N"
 else
     $PRINTF "$FAILED\n"
-    echo "$CMD" >&2
+    echo "$CMD"
     cat "${te}" >&2
     numFAIL=$((numFAIL+1))
     listFAIL="$listFAIL $N"
@@ -15785,8 +15795,8 @@ case "$TESTS" in
 *%$N%*|*%functions%*|*%exec%*|*%fork%*|*%socket%*|*%unix%*|*%$NAME%*)
 TEST="$NAME: test the children-shutup option"
 # Run a UNIX domain listening server with options fork and children-shutup, and
-# an TCP client to invalid port that will fail.
-# Connect to the server and check if it logs the connect failure as warning.
+# that connects to a closed TCP4 port.
+# Connect to the server and check if it logs the TCP4-CONNECT failure as warning.
 if ! eval $NUMCOND; then :;
 elif ! F=$(testfeats UNIX LISTEN EXEC FILE); then
     $PRINTF "test $F_n $TEST... ${YELLOW}Feature $F not available${NORMAL}\n" $N
@@ -15813,7 +15823,7 @@ printf "test $F_n $TEST... " $N
 $CMD0 >/dev/null 2>"${te}0" &
 pid0=$!
 waitunixport $ts 1
-$CMD1 2>"${te}1"
+{ $CMD1 2>"${te}1"; sleep 1; }
 rc1=$?
 kill $pid0 2>/dev/null; wait
 relsleep 1 	# child process might need more time
@@ -17056,6 +17066,60 @@ esac
 N=$((N+1))
 
 
+# Test the sigint option
+NAME=EXEC_SIGINT
+case "$TESTS" in
+*%$N%*|*%functions%*|*%socket%*|*%exec%*|*%sigint%*|*%$NAME%*)
+TEST="$NAME: sigint option with EXEC"
+# Run Socat with an EXEC address invoking Socat, with option sigint
+# Send the parent a SIGINT; when the child gets SIGINT too (vs.SIGTERM)
+# the test succeeded
+if ! eval $NUMCOND; then :;
+# Remove unneeded checks, adapt lists of the remaining ones
+elif ! F=$(testfeats STDIO EXEC PIPE); then
+    $PRINTF "test $F_n $TEST... ${YELLOW}Feature $F not configured in $SOCAT${NORMAL}\n" $N
+    numCANT=$((numCANT+1))
+    listCANT="$listCANT $N"
+elif ! A=$(testaddrs STDIO EXEC PIPE); then
+    $PRINTF "test $F_n $TEST... ${YELLOW}Address $A not available in $SOCAT${NORMAL}\n" $N
+    numCANT=$((numCANT+1))
+    listCANT="$listCANT $N"
+elif ! o=$(testoptions setsid sigint) >/dev/null; then
+    $PRINTF "test $F_n $TEST... ${YELLOW}Option $o not available in $SOCAT${NORMAL}\n" $N
+    numCANT=$((numCANT+1))
+    listCANT="$listCANT $N"
+else
+tf="$td/test$N.stdout"
+te="$td/test$N.stderr"
+tdiff="$td/test$N.diff"
+da="test$N $(date) $RANDOM"
+CMD0="$TRACE $SOCAT $opts -T 1 PIPE EXEC:cat,setsid,sigint"
+printf "test $F_n $TEST... " $N
+$CMD0 >/dev/null 2>"${te}0" &
+pid0=$!
+relsleep 2
+kill -INT $pid0
+wait
+if grep -q " W waitpid..: child .* exited with status 130" "${te}0" ||
+   grep -q " W waitpid..: child .* exited on signal 2" "${te}0"; then
+    $PRINTF "$OK\n"
+    if [ "$VERBOSE" ]; then echo "$CMD0 &"; fi
+    if [ "$DEBUG" ];   then cat "${te}0" >&2; fi
+    numOK=$((numOK+1))
+else
+    $PRINTF "$FAILED\n"
+    echo "$CMD0 &"
+    cat "${te}0" >&2
+    numFAIL=$((numFAIL+1))
+    listFAIL="$listFAIL $N"
+    namesFAIL="$namesFAIL $NAME"
+fi
+fi # NUMCOND
+ ;;
+esac
+N=$((N+1))
+
+
 # end of common tests
 
 ##################################################################################
diff --git a/xio-interface.c b/xio-interface.c
index ba03f52..f29012f 100644
--- a/xio-interface.c
+++ b/xio-interface.c
@@ -47,7 +47,7 @@ const struct optdesc opt_iff_automedia   = { "iff-automedia",   "automedia",   O
 #endif
 /*const struct optdesc opt_iff_dynamic   = { "iff-dynamic",     "dynamic",     OPT_IFF_DYNAMIC,     GROUP_INTERFACE, PH_OFFSET, TYPE_BOOL,     OFUNC_OFFSET_MASKS, XIO_OFFSETOF(para.interface.iff_opts), XIO_SIZEOF(short), IFF_DYNAMIC };*/
 #ifdef PACKET_AUXDATA
-const struct optdesc opt_retrieve_vlan   = { "retrieve-vlan",   NULL,          OPT_RETRIEVE_VLAN,   GROUP_INTERFACE, PH_LATE, TYPE_INT,      OFUNC_SPEC };
+const struct optdesc opt_retrieve_vlan   = { "retrieve-vlan",   NULL,          OPT_RETRIEVE_VLAN,   GROUP_INTERFACE, PH_LATE, TYPE_CONST,    OFUNC_SPEC };
 #endif
 #if LATER
 const struct optdesc opt_route           = { "route",           NULL,          OPT_ROUTE,           GROUP_INTERFACE, PH_INIT, TYPE_STRING,   OFUNC_SPEC };
diff --git a/xio-ip6.c b/xio-ip6.c
index e24d18f..49a18d1 100644
--- a/xio-ip6.c
+++ b/xio-ip6.c
@@ -612,7 +612,7 @@ int xiotype_ip6_join_source_group(
 	 opt->value3.u_string/*srcaddr*/);
 
    if (!xioparms.experimental) {
-      Warn("option ipv6-join-source-group is experimental");
+      Warn1("option %s is experimental", opt->desc->defname);
    }
 
    return 0;
diff --git a/xio-posixmq.c b/xio-posixmq.c
index 78d26fe..c88dba1 100644
--- a/xio-posixmq.c
+++ b/xio-posixmq.c
@@ -58,6 +58,7 @@ static int xioopen_posixmq(
 
 	if (!xioparms.experimental) {
 		Error1("%s: use option --experimental to acknowledge unmature state", argv[0]);
+		return STAT_NORETRY;
 	}
 	if (argc != 2) {
 		Error2("%s: wrong number of parameters (%d instead of 1)",
@@ -210,9 +211,11 @@ static int xioopen_posixmq(
 				;
 		}
 
+#if WITH_RETRY
 		if (with_intv) {
 			Nanosleep(&sfd->intervall, NULL);
 		}
+#endif
 
 		/* now we are ready to handle signals */
 		Sigprocmask(SIG_UNBLOCK, &mask_sigchld, NULL);
diff --git a/xio-socket.c b/xio-socket.c
index 26eda94..fff32d3 100644
--- a/xio-socket.c
+++ b/xio-socket.c
@@ -1524,7 +1524,7 @@ int xiodopacketinfo(
 			      valbuff, sizeof(valbuff)-1);
 	 break;
 #endif /* WITH_IP6 */
-#if HAVE_STRUCT_CMSGHDR && HAVE_STRUCT_TPACKET_AUXDATA
+#if _WITH_INTERFACE && HAVE_STRUCT_CMSGHDR && HAVE_STRUCT_TPACKET_AUXDATA
       case SOL_PACKET:
 	 xiolog_ancillary_packet(sfd, cmsg, &num, typbuff, sizeof(typbuff)-1,
 			      nambuff, sizeof(nambuff)-1,
diff --git a/xio-socks5.c b/xio-socks5.c
index fb85202..30feb23 100644
--- a/xio-socks5.c
+++ b/xio-socks5.c
@@ -517,12 +517,18 @@ static int xioopen_socks5(
 	char infobuff[256];
 
 	if (!xioparms.experimental) {
-		Error1("%s: requires option --experimental", argv[0]);
+		Error1("%s: use option --experimental to acknowledge unmature state", argv[0]);
 		return STAT_NORETRY;
 	}
 	if (argc != 5) {
-		Error1("%s: 4 parameters required like :<socks-server>:<socks-port>:<target-server>:<target-port>",
-		       argv[0]);
+#if WITH_HELP
+		Error2("%s: 4 parameters required like %s", argv[0],
+		       socks_command==SOCKS5_COMMAND_CONNECT ?
+		       xioaddr_socks5_connect.syntax :
+		       xioaddr_socks5_listen.syntax);
+#else
+		Error1("%s: 4 parameters required", argv[0]);
+#endif
 		return STAT_NORETRY;
 	}
 
diff --git a/xio.h b/xio.h
index 3c47d64..8d1cb05 100644
--- a/xio.h
+++ b/xio.h
@@ -95,7 +95,7 @@ enum xiotag {
 } ;
 
 /* Keep condition consistent with xioopts.h:GROUP_*! */
-#if WITH_SCTP
+#if WITH_SCTP || WITH_POSIXMQ
 typedef uint64_t groups_t;
 #define F_groups_t F_uint64_x
 #else
@@ -327,7 +327,7 @@ typedef union bipipe {
       enum xiotag tag;
       const struct addrdesc *addr;
       int         flags;
-   } common;
+   } common; 	/* "bipipe.common" */
    struct single  stream;
    struct {
       enum xiotag tag;
diff --git a/xiohelp.c b/xiohelp.c
index 1c69cd1..60689e2 100644
--- a/xiohelp.c
+++ b/xiohelp.c
@@ -14,7 +14,7 @@
 /* keep consistent with xioopts.h:enum e_types ! */
 static const char *optiontypenames[] = {
 	"CONST",	"BIN",		"BOOL",		"BYTE",
-	"INT",		"LONG",		"STRING",	"PTRDIFF",
+	"INT",		"INT/NULL",	"LONG",		"STRING",	"PTRDIFF",
 	"SHORT",	"SIZE_T",	"SOCKADDR",	"UNSIGNED-INT",
 	"UNSIGNED-LONG","UNSIGNED-SHORT","MODE_T",	"GID_T",
 	"UID_T",	"INT[3]",	"STRUCT-TIMEVAL", "STRUCT-TIMESPEC",
@@ -23,7 +23,6 @@ static const char *optiontypenames[] = {
 	"INT:STRING",	"INT:INT:INT",	"INT:INT:BIN",	"INT:INT:STRING",
 	"INT:INT:GENERIC",
 	"IP4NAME",
-
 #if HAVE_STRUCT_LINGER
 			"STRUCT-LINGER",
 #endif
@@ -49,7 +48,7 @@ static const char *addressgroupnames[] = {
 	"UNIX",		"IP4",		"IP6",		"INTERFACE",
 	"UDP",		"TCP",		"SOCKS4",	"OPENSSL",
 	"PROCESS",	"APPL",		"HTTP",		"undef",
-	"SCTP"
+	"SCTP",		"POSIXMQ"
 } ;
 
 /* keep consistent with xioopts.h:enum ephase ! */
@@ -66,7 +65,8 @@ static char *optionphasenames[] = {
 	"CONNECTED",
 	"PREFORK",	"FORK",		"PASTFORK",
 	"LATE",		"LATE2",
-	"PREEXEC",	"EXEC",		"SPECIFIC",
+	"PREEXEC",	"EXEC",		"PASTEXEC",
+	"SPECIFIC",
 	NULL
 } ;
 
diff --git a/xioopen.c b/xioopen.c
index e466630..eb532ab 100644
--- a/xioopen.c
+++ b/xioopen.c
@@ -33,7 +33,7 @@ const struct addrname addressnames[] = {
    { "ABSTRACT-RECVFROM",	&xioaddr_abstract_recvfrom },
    { "ABSTRACT-SENDTO",		&xioaddr_abstract_sendto },
 #endif /* defined(WITH_UNIX) && defined(WITH_ABSTRACT_UNIXSOCKET) */
-#if WITH_LISTEN
+#if WITH_LISTEN && WITH_FDNUM
    { "ACCEPT", 			&xioaddr_accept_fd },
    { "ACCEPT-FD", 		&xioaddr_accept_fd },
 #endif
diff --git a/xioopts.c b/xioopts.c
index 324147a..5aca01f 100644
--- a/xioopts.c
+++ b/xioopts.c
@@ -309,7 +309,9 @@ const struct optname optionnames[] = {
 	IF_OPENSSL("cert",	&opt_openssl_certificate)
 	IF_OPENSSL("certificate",	&opt_openssl_certificate)
 	IF_TERMIOS("cfmakeraw",		&opt_termios_cfmakeraw)
+#if WITH_LISTEN
 	IF_ANY    ("children-shutup",	&opt_children_shutup)
+#endif
 	IF_ANY    ("chroot",	&opt_chroot)
 	IF_ANY    ("chroot-early",	&opt_chroot_early)
 	/*IF_TERMIOS("cibaud",	&opt_cibaud)*/
@@ -2593,7 +2595,7 @@ int parseopts_table(const char **a, groups_t groups, struct opt **opts,
 	 break;
 #endif
 
-#if HAVE_STRUCT_GROUP_SOURCE_REQ
+#if WITH_IP6 && HAVE_STRUCT_GROUP_SOURCE_REQ
       case TYPE_GROUP_SOURCE_REQ:
 	 xiotype_ip6_join_source_group(token, ent, opt);
 	 break;
@@ -3831,7 +3833,7 @@ int applyopt(
 #if _WITH_INTERFACE
 	 case OPT_RETRIEVE_VLAN:
 	    if (!xioparms.experimental) {
-	       Warn("option retrieve-vlan is experimental");
+	       Warn1("option %s is experimental", opt->desc->defname);
 	    }
 	    if (_interface_setsockopt_auxdata(fd, 1) < 0) {
 	       return -1;
@@ -3953,8 +3955,8 @@ int applyopts2(int fd, struct opt *opts, unsigned int from, unsigned int to) {
 int applyopts_optgroup(
 	int fd,
 	struct opt *opts,
-	unsigned int from, 	/* -1: from first phase, not in order */
-	unsigned int to, 	/* -1: to last phase, not in order */
+	int from, 	/* -1: from first phase, not in order */
+	int to, 	/* -1: to last phase, not in order */
 	groups_t groups)
 {
 	struct opt *opt = opts;
diff --git a/xioopts.h b/xioopts.h
index f03f204..7211322 100644
--- a/xioopts.h
+++ b/xioopts.h
@@ -24,11 +24,10 @@ enum e_types {
    TYPE_CONST,		/* keyword means a fix value - implies int type */
    TYPE_BIN,		/* raw binary data, length determined by data */
    TYPE_BOOL,		/* value is 0 or 1 (no-value is interpreted as 1) */
-   TYPE_BOOL_NULL,	/* value is 0 or 1 (no-value is interpreted as 1), or just opt= */
    TYPE_BYTE,		/* unsigned char */
 
    TYPE_INT,		/* int */
-   TYPE_INT_NULL,	/* int, or opt= for no action (instead of default) */
+   TYPE_INT_NULL,	/* int, or just opt= for no action (instead of default) */
    TYPE_LONG,		/* long */
    TYPE_STRING,		/* char * */
    TYPE_NAME = TYPE_STRING,
@@ -152,7 +151,6 @@ enum e_func {
 #define GROUP_FILE GROUP_REG
 #define GROUP_SOCKET	0x00000020
 #define GROUP_READLINE	0x00000040
-#define GROUP_POSIXMQ	0x00000080
 
 #define GROUP_NAMED	0x00000100	/* file system entry */
 #define GROUP_OPEN	0x00000200	/* flags for open() */
@@ -186,12 +184,15 @@ enum e_func {
 #define GROUP_HTTP	0x40000000	/* any HTTP client */
 
 /* Keep condition consistent with xio.h:groups_t! */
-#if WITH_SCTP
+#if WITH_SCTP || WITH_POSIXMQ
 /* The following groups are not expected on systems without uint64_t */
+/* The following groups are not expected on systems withous uint64_t */
 #define GROUP_IP_SCTP	0x0100000000U
+#define GROUP_POSIXMQ	0x0200000000U
 #define GROUP_ALL	0x03ffffffffU
 #else
 #define GROUP_IP_SCTP	0
+#define GROUP_POSIXMQ	0
 #define GROUP_ALL	0xffffffffU
 #endif
 
@@ -902,34 +903,44 @@ enum e_phase {
    PH_OFFSET, 		/* automatically applied to xio-fd */
    PH_INIT,		/* retrieving info from original state */
    PH_EARLY,		/* before any other processing */
+
    PH_PREOPEN,		/* before file descriptor is created/opened */
    PH_OPEN,		/* during filesystem entry creation/open */
    PH_PASTOPEN,		/* past filesystem entry creation/open */
+
    PH_PRESOCKET,	/* before socket call */
    PH_SOCKET,		/* for socket call */
    PH_PASTSOCKET,	/* after socket call */
+
    PH_PREBIGEN,		/* before socketpair() pipe() openpty() */
    PH_BIGEN,		/* during socketpair() pipe() openpty() */
    PH_PASTBIGEN,	/* past socketpair() pipe() openpty() */
    PH_FD,		/* soon after FD creation or identification */
+
    PH_PREBIND,		/* before socket bind() */
    PH_BIND,		/* during socket bind() ? */
    PH_PASTBIND,		/* past socket bind() - for client and server sockets! */
+
    PH_PRELISTEN,	/* before socket listen() */
    PH_LISTEN,		/* during socket listen() ? */
    PH_PASTLISTEN,	/* after socket listen() */
+
    PH_PRECONNECT,	/* before socket connect() */
    PH_CONNECT,		/* during socket connect() ? */
    PH_PASTCONNECT,	/* after socket connect() */
+
    PH_PREACCEPT,	/* before socket accept() */
    PH_ACCEPT,		/* during socket accept() ? */
    PH_PASTACCEPT,	/* after socket accept() */
    PH_CONNECTED,	/* for sockets, after connect() or accept() */
+
    PH_PREFORK,		/* before fork() (with both listen and exec!) */
    PH_FORK,		/* during fork() (with both listen and exec!) */
    PH_PASTFORK,		/* after fork() (with both listen and exec!) */
+
    PH_LATE,		/* FD is ready, before start of data loop */
    PH_LATE2,		/* FD is ready, dropping privileges */
+
    PH_PREEXEC,		/* before exec() or system() */
    PH_EXEC,		/* during exec() or system() */
    PH_PASTEXEC,		/* only reached on addresses that do NOT exec() */
@@ -971,7 +982,7 @@ extern int retropt_timespec(struct opt *opts, int optcode, struct timespec *resu
 extern int retropt_bind(struct opt *opts, int af, int socktype, int ipproto, struct sockaddr *sa, socklen_t *salen, int feats, const int ai_flags[2]);
 extern int applyopts(int fd, struct opt *opts, enum e_phase phase);
 extern int applyopts2(int fd, struct opt *opts, unsigned int from, unsigned int to);
-extern int applyopts_optgroup(int fd, struct opt *opts, unsigned int from, unsigned int to, groups_t groups);
+extern int applyopts_optgroup(int fd, struct opt *opts, int from, int to, groups_t groups);
 extern int applyopts_flags(struct opt *opts, groups_t group, flags_t *result);
 extern int applyopts_cloexec(int fd, struct opt *opts);
 extern int applyopts_early(const char *path, struct opt *opts);
diff --git a/xioshutdown.c b/xioshutdown.c
index 2175916..1e8e3d0 100644
--- a/xioshutdown.c
+++ b/xioshutdown.c
@@ -72,6 +72,7 @@ int xioshutdown(xiofile_t *sock, int how) {
       return 0;
 #if _WITH_SOCKET
    case XIOSHUT_NULL:
+      writenull = '\0'; 	/* assign something to make gcc happy */
       /* send an empty packet; only useful on datagram sockets? */
       xiowrite(sock, &writenull, 0);
       return 0;