diff --git a/clock.c b/clock.c
index 819421e..300d2d7 100644
--- a/clock.c
+++ b/clock.c
@@ -576,7 +576,7 @@ struct clock *clock_create(int phc_index, struct interface *iface, int count,
 	struct interface udsif;
 
 	memset(&udsif, 0, sizeof(udsif));
-	snprintf(udsif.name, sizeof(udsif.name), UDS_PATH);
+	snprintf(udsif.name, sizeof(udsif.name), "%s", uds_path);
 	udsif.transport = TRANS_UDS;
 
 	srandom(time(NULL));
diff --git a/config.c b/config.c
index 8cae57f..fe4c0f3 100644
--- a/config.c
+++ b/config.c
@@ -393,6 +393,11 @@ static enum parser_result parse_global_setting(const char *option,
 			return r;
 		*cfg->udp6_scope = uval;
 
+	} else if (!strcmp(option, "uds_address")) {
+		if (strlen(value) > MAX_IFNAME_SIZE)
+			return OUT_OF_RANGE;
+		strncpy(cfg->uds_address, value, MAX_IFNAME_SIZE);
+
 	} else if (!strcmp(option, "logging_level")) {
 		r = get_ranged_int(value, &val,
 				   PRINT_LEVEL_MIN, PRINT_LEVEL_MAX);
diff --git a/config.h b/config.h
index 94704a4..40d8978 100644
--- a/config.h
+++ b/config.h
@@ -27,7 +27,7 @@
 #include "sk.h"
 
 #define MAX_PORTS 8
-#define MAX_IFNAME_SIZE 16
+#define MAX_IFNAME_SIZE 108 /* = UNIX_PATH_MAX */
 
 /** Defines a network interface, with PTP options. */
 struct interface {
@@ -89,6 +89,7 @@ struct config {
 	unsigned char *ptp_dst_mac;
 	unsigned char *p2p_dst_mac;
 	unsigned char *udp6_scope;
+	char *uds_address;
 
 	int print_level;
 	int use_syslog;
diff --git a/default.cfg b/default.cfg
index 72665a6..0a42a92 100644
--- a/default.cfg
+++ b/default.cfg
@@ -59,6 +59,7 @@ transportSpecific	0x0
 ptp_dst_mac		01:1B:19:00:00:00
 p2p_dst_mac		01:80:C2:00:00:0E
 udp6_scope		0x0E
+uds_address		/var/run/ptp4l
 #
 # Default interface options
 #
diff --git a/gPTP.cfg b/gPTP.cfg
index 30719b6..9c26ec5 100644
--- a/gPTP.cfg
+++ b/gPTP.cfg
@@ -57,6 +57,7 @@ clock_servo		pi
 transportSpecific	0x1
 ptp_dst_mac		01:80:C2:00:00:0E
 p2p_dst_mac		01:80:C2:00:00:0E
+uds_address		/var/run/ptp4l
 #
 # Default interface options
 #
diff --git a/incdefs.sh b/incdefs.sh
new file mode 100755
index 0000000..cf00eaf
--- /dev/null
+++ b/incdefs.sh
@@ -0,0 +1,71 @@
+#!/bin/sh
+#
+# Discover the CFLAGS to use during compilation.
+#
+# Copyright (C) 2013 Richard Cochran <richardcochran@gmail.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+#
+# Look for the clock_adjtime functional prototype in the C library.
+#
+user_flags()
+{
+	dirs=$(echo "" | ${CROSS_COMPILE}cpp -Wp,-v 2>&1 >/dev/null | grep ^" /")
+	for d in $dirs; do
+		files=$(find $d -type f -name time.h)
+		for f in $files; do
+			if grep -q clock_adjtime $f; then
+				printf " -D_GNU_SOURCE -DHAVE_CLOCK_ADJTIME"
+				return
+			fi
+		done
+	done
+}
+
+#
+# Find the most appropriate kernel header for the SIOCSHWTSTAMP ioctl.
+#
+# 1. custom kernel or cross build using KBUILD_OUTPUT
+# 2. sanitized headers installed under /lib/modules/`uname -r`/build
+# 3. normal build using standard system headers
+#
+kernel_flags()
+{
+	prefix=""
+	tstamp=/usr/include/linux/net_tstamp.h
+
+	if [ "x$KBUILD_OUTPUT" != "x" ]; then
+		# With KBUILD_OUTPUT set, we are building against
+		# either a custom kernel or a cross compiled kernel.
+		build=${KBUILD_OUTPUT}
+	else
+		# If the currently running kernel is a custom build
+		# with the headers installed, then we should use them.
+		build=/lib/modules/`uname -r`/build
+	fi
+
+	if [ -f ${build}${tstamp} ]; then
+		prefix=${build}
+		printf " -I%s/usr/include" $prefix
+	fi
+
+	if grep -q HWTSTAMP_TX_ONESTEP_SYNC ${prefix}${tstamp}; then
+		printf " -DHAVE_ONESTEP_SYNC"
+	fi
+}
+
+flags="$(user_flags)$(kernel_flags)"
+echo "$flags"
diff --git a/makefile b/makefile
index d79a1df..2eaeca5 100644
--- a/makefile
+++ b/makefile
@@ -15,21 +15,12 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
-KBUILD_OUTPUT ?= /lib/modules/$(shell uname -r)/build
-
-FEAT_CFLAGS :=
-ifneq ($(shell grep --no-messages clock_adjtime /usr/include/bits/time.h),)
-FEAT_CFLAGS += -D_GNU_SOURCE -DHAVE_CLOCK_ADJTIME
-endif
-ifneq ($(shell grep --no-messages HWTSTAMP_TX_ONESTEP_SYNC $(KBUILD_OUTPUT)/usr/include/linux/net_tstamp.h),)
-FEAT_CFLAGS += -DHAVE_ONESTEP_SYNC
-endif
+KBUILD_OUTPUT =
 
 DEBUG	=
 CC	= $(CROSS_COMPILE)gcc
-INC	= -I$(KBUILD_OUTPUT)/usr/include
 VER     = -DVER=$(version)
-CFLAGS	= -Wall $(VER) $(INC) $(DEBUG) $(FEAT_CFLAGS) $(EXTRA_CFLAGS)
+CFLAGS	= -Wall $(VER) $(incdefs) $(DEBUG) $(EXTRA_CFLAGS)
 LDLIBS	= -lm -lrt $(EXTRA_LDFLAGS)
 PRG	= ptp4l pmc phc2sys hwstamp_ctl
 OBJ     = bmc.o clock.o clockadj.o config.o fault.o fsm.o ptp4l.o mave.o \
@@ -40,6 +31,7 @@ OBJECTS	= $(OBJ) hwstamp_ctl.o phc2sys.o pmc.o pmc_common.o sysoff.o
 SRC	= $(OBJECTS:.o=.c)
 DEPEND	= $(OBJECTS:.o=.d)
 srcdir	:= $(dir $(lastword $(MAKEFILE_LIST)))
+incdefs := $(shell $(srcdir)/incdefs.sh)
 version := $(shell $(srcdir)/version.sh $(srcdir))
 VPATH	= $(srcdir)
 
diff --git a/pmc.8 b/pmc.8
index d91c657..988581f 100644
--- a/pmc.8
+++ b/pmc.8
@@ -1,4 +1,4 @@
-.TH PMC 8 "July 2013" "linuxptp"
+.TH PMC 8 "October 2013" "linuxptp"
 .SH NAME
 pmc \- PTP management client
 
@@ -19,6 +19,8 @@ pmc \- PTP management client
 ] [
 .BI \-i " interface"
 ] [
+.BI \-s " uds-address"
+] [
 .BI \-t " transport-specific-field"
 ] [
 .B \-v
@@ -41,6 +43,11 @@ updates the specified information and
 .BR COMMAND )
 initiates the specified event.
 
+By default the management commands are addressed to all ports. The
+.B TARGET
+command can be used to select a particular clock and port for the
+subsequent messages.
+
 Command
 .B help
 can be used to get a list of supported actions and management IDs.
@@ -69,6 +76,10 @@ Specify the domain number in sent messages. The default is 0.
 Specify the network interface. The default is /var/run/pmc for the Unix Domain
 Socket transport and eth0 for the other transports.
 .TP
+.BI \-s " uds-address"
+Specifies the address of the server's UNIX domain socket.
+The default is /var/run/ptp4l.
+.TP
 .BI \-t " transport-specific-field"
 Specify the transport specific field in sent messages as a hexadecimal number.
 The default is 0x0.
@@ -88,12 +99,52 @@ length TLV values instead.
 
 .SH MANAGEMENT IDS
 
+.TP
+.B ANNOUNCE_RECEIPT_TIMEOUT
+.TP
+.B CLOCK_ACCURACY
+.TP
+.B CLOCK_DESCRIPTION
 .TP
 .B CURRENT_DATA_SET
 .TP
+.B DEFAULT_DATA_SET
+.TP
+.B DELAY_MECHANISM
+.TP
+.B DOMAIN
+.TP
+.B GRANDMASTER_SETTINGS_NP
+.TP
+.B LOG_ANNOUNCE_INTERVAL
+.TP
+.B LOG_MIN_PDELAY_REQ_INTERVAL
+.TP
+.B LOG_SYNC_INTERVAL
+.TP
+.B NULL_MANAGEMENT
+.TP
+.B PARENT_DATA_SET
+.TP
+.B PORT_DATA_SET
+.TP
+.B PRIORITY1
+.TP
+.B PRIORITY2
+.TP
+.B SLAVE_ONLY
+.TP
+.B TIMESCALE_PROPERTIES
+.TP
+.B TIME_PROPERTIES_DATA_SET
+.TP
 .B TIME_STATUS_NP
 .TP
-.B NULL_MANAGEMENT
+.B TRACEABILITY_PROPERTIES
+.TP
+.B USER_DESCRIPTION
+.TP
+.B VERSION_NUMBER
 
 .SH SEE ALSO
 .BR ptp4l (8)
diff --git a/pmc.c b/pmc.c
index 3a6d697..c9851cd 100644
--- a/pmc.c
+++ b/pmc.c
@@ -31,6 +31,7 @@
 #include "pmc_common.h"
 #include "print.h"
 #include "tlv.h"
+#include "uds.h"
 #include "util.h"
 #include "version.h"
 
@@ -676,6 +677,7 @@ static void usage(char *progname)
 		" -h        prints this message and exits\n"
 		" -i [dev]  interface device to use, default 'eth0'\n"
 		"           for network and '/var/run/pmc' for UDS.\n"
+		" -s [path] server address for UDS, default '/var/run/ptp4l'.\n"
 		" -t [hex]  transport specific field, default 0x0\n"
 		" -v        prints the software version and exits\n"
 		" -z        send zero length TLV values with the GET actions\n"
@@ -697,7 +699,7 @@ int main(int argc, char *argv[])
 	/* Process the command line arguments. */
 	progname = strrchr(argv[0], '/');
 	progname = progname ? 1+progname : argv[0];
-	while (EOF != (c = getopt(argc, argv, "246u""b:d:hi:t:vz"))) {
+	while (EOF != (c = getopt(argc, argv, "246u""b:d:hi:s:t:vz"))) {
 		switch (c) {
 		case '2':
 			transport_type = TRANS_IEEE_802_3;
@@ -720,6 +722,14 @@ int main(int argc, char *argv[])
 		case 'i':
 			iface_name = optarg;
 			break;
+		case 's':
+			if (strlen(optarg) > MAX_IFNAME_SIZE) {
+				fprintf(stderr, "path %s too long, max is %d\n",
+					optarg, MAX_IFNAME_SIZE);
+				return -1;
+			}
+			strncpy(uds_path, optarg, MAX_IFNAME_SIZE);
+			break;
 		case 't':
 			if (1 == sscanf(optarg, "%x", &c))
 				transport_specific = c << 4;
diff --git a/ptp4l.8 b/ptp4l.8
index 493626d..221d7d1 100644
--- a/ptp4l.8
+++ b/ptp4l.8
@@ -1,4 +1,4 @@
-.TH PTP4l 8 "July 2013" "linuxptp"
+.TH PTP4l 8 "October 2013" "linuxptp"
 .SH NAME
 ptp4l \- PTP Boundary/Ordinary Clock
 
@@ -354,6 +354,10 @@ will be used as the second byte of the primary address.  This option
 is only relevant with IPv6 transport.  See RFC 4291.  The default is
 0x0E for the global scope.
 .TP
+.B uds_address
+Specifies the address of the UNIX domain socket for receiving local
+management messages. The default is /var/run/ptp4l.
+.TP
 .B logging_level
 The maximum logging level of messages which should be printed.
 The default is 6 (LOG_INFO).
diff --git a/ptp4l.c b/ptp4l.c
index b0d1c9c..dac303a 100644
--- a/ptp4l.c
+++ b/ptp4l.c
@@ -32,6 +32,7 @@
 #include "sk.h"
 #include "transport.h"
 #include "udp6.h"
+#include "uds.h"
 #include "util.h"
 #include "version.h"
 
@@ -111,6 +112,7 @@ static struct config cfg_settings = {
 	.ptp_dst_mac = ptp_dst_mac,
 	.p2p_dst_mac = p2p_dst_mac,
 	.udp6_scope = &udp6_scope,
+	.uds_address = uds_path,
 
 	.print_level = LOG_INFO,
 	.use_syslog = 1,
diff --git a/uds.c b/uds.c
index 0d114c3..1dbfd6c 100644
--- a/uds.c
+++ b/uds.c
@@ -30,6 +30,8 @@
 #include "transport_private.h"
 #include "uds.h"
 
+char uds_path[MAX_IFNAME_SIZE + 1] = "/var/run/ptp4l";
+
 #define UDS_FILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) /*0660*/
 
 struct uds {
@@ -58,7 +60,7 @@ static int uds_open(struct transport *t, char *name, struct fdarray *fda,
 	}
 	memset(&sa, 0, sizeof(sa));
 	sa.sun_family = AF_LOCAL;
-	strcpy(sa.sun_path, name);
+	strncpy(sa.sun_path, name, sizeof(sa.sun_path) - 1);
 
 	unlink(name);
 
@@ -72,7 +74,7 @@ static int uds_open(struct transport *t, char *name, struct fdarray *fda,
 	/* For client use, pre load the server path. */
 	memset(&sa, 0, sizeof(sa));
 	sa.sun_family = AF_LOCAL;
-	strcpy(sa.sun_path, UDS_PATH);
+	strncpy(sa.sun_path, uds_path, sizeof(sa.sun_path) - 1);
 	uds->sa = sa;
 	uds->len = sizeof(sa);
 
diff --git a/uds.h b/uds.h
index 24effa8..d7f6626 100644
--- a/uds.h
+++ b/uds.h
@@ -20,13 +20,14 @@
 #ifndef HAVE_UDS_H
 #define HAVE_UDS_H
 
+#include "config.h"
 #include "fd.h"
 #include "transport.h"
 
 /**
  * Address of the server.
  */
-#define UDS_PATH "/var/run/ptp4l"
+extern char uds_path[MAX_IFNAME_SIZE + 1];
 
 /**
  * Allocate an instance of a UDS transport.