* Add support for ${TRYBROKEN}.

* Clients no longer have ssh access to the master, so we need to
  push/pull everything on the client from here.  This means we need to
  know where the build took place so we can go in and get the files
  after it finishes.  Introduce the claim-chroot script which
  atomically claims a free chroot directory on the host and returns
  the name.  This directory is later populated by the portbuild script
  if it does not already contain an extracted bindist.

* Use the per-node portbuild.$(hostname) config file to decide where
  in the filesystem to claim the chroot on the build host.

* If a port failed unexpectedly (i.e. is not marked BROKEN), or if
  something strange happened when trying to pull in build results from
  a client, then send me email (XXX should be configurable).

* Clean up after the build finishes and we have everything we need, by
  dispatching the clean-chroot script on the client.

Tools/portbuild/scripts/pdispatch

@@ -16,8 +16,8 @@ if [ "$arch" = "alpha" -o "$arch" = "sparc64" ]; then
 	# wait 16 hours maximum
 	timeout=57600
 else
-	# wait 8 hours maximum
-	timeout=28800
+	# wait 80 hours maximum
+	timeout=288000
 fi
 
 branch=$1
@@ -31,19 +31,31 @@ unset DISPLAY
 
 pkgname=$(basename $1 ${PKGSUFFIX})
 
-if grep -qxF $pkgname ${pb}/${arch}/${branch}/duds; then
-  echo "skipping $pkgname"
+if grep -qxF ${pkgname} ${pb}/${arch}/${branch}/duds; then
+  echo "skipping ${pkgname}"
   exit 1
 fi
 
 args=${1+"$@"}
+
 num=$(wc -w ${pb}/${arch}/ulist | awk '{print $1}')
 random=$(jot -r 1 1 ${num})
 mach=$(cat ${pb}/${arch}/ulist | cut -f ${random} -d ' ' )
+# If ulist is empty, then all build machines are busy, so try again in 15 seconds.
+if [ -z "${mach}" ]; then
+	echo "All machines busy, sleeping"
+	sleep 15
+	echo "Retrying build of ${pkgname}"
+	make ${pkgname}
+	exit 0
+fi
 set $mach
+
 flags=""
+noclean=0
 if [ "x$NOCLEAN" != "x" ]; then
   flags="${flags} -noclean"
+  noclean=1
 fi
 if [ "x$NO_RESTRICTED" != "x" ]; then
   flags="${flags} -norestr"
@@ -60,6 +72,55 @@ fi
 if [ "x$FETCH_ORIGINAL" != "x" ]; then
   flags="${flags} -fetch-original"
 fi
+if [ "x$TRYBROKEN" != "x" ]; then
+  flags="${flags} -trybroken"
+fi
+host=$1
+. ${pb}/${arch}/portbuild.${host}
 
-echo "dispatching: ssh -a -t -n root@$1 ${command} ${arch} ${branch} $flags $args at $(date)"
-${pb}/scripts/ptimeout.host $timeout ssh -a -t -n root@$1 ${command} ${arch} ${branch} ${flags} $args
+echo "Claiming a directory for ${pkgname} on ${host}"
+chroot=$(ssh -a -n root@${host} ${pb}/scripts/claim-chroot ${arch} ${branch} ${pkgname})
+status=$?
+if [ ! ${status} ]; then
+    exit ${status}
+fi
+echo "--> got directory ${chroot}"
+
+echo "dispatching: ssh -a -t -n root@${host} ${command} ${arch} ${branch} ${chroot} ${flags} \"$ED\" \"$PD\" \"$FD\" \"$BD\" \"$RD\" ${args}"
+${pb}/scripts/ptimeout.host $timeout ssh -a -t -n root@${host} ${command} ${arch} ${branch} ${chroot} ${flags} \"$ED\" \"$PD\" \"$FD\" \"$BD\" \"$RD\" ${args}
+error=$?
+
+# Pull in the results of the build from the client
+
+scp root@${host}:${chroot}/tmp/${pkgname}.log ${pb}/${arch}/${branch}/logs/${pkgname}.log
+(ssh -a -n root@${host} test -f ${chroot}/tmp/work.tbz ) && scp root@${host}:${chroot}/tmp/work.tbz ${pb}/${arch}/${branch}/wrkdirs/${pkgname}.tbz
+
+if [ "x$WANT_DISTFILES" != "x" ]; then
+  mkdir -p ${pb}/${arch}/${branch}/distfiles/.pbtmp/${pkgname}
+  ssh -a -n root@${host} tar -C ${chroot}/tmp/distfiles -cf - . | \
+    tar --unlink -C ${pb}/${arch}/${branch}/distfiles/.pbtmp/${pkgname} -xvf -
+  touch ${pb}/${arch}/${branch}/distfiles/.pbtmp/${pkgname}/.done
+fi
+
+if [ "${error}" = 0 ]; then
+  ssh -a -n root@${host} tar -C ${chroot}/tmp -cf - packages | \
+    tar --unlink -C ${pb}/${arch}/${branch} -xvf -
+  test -f ${pb}/${arch}/${branch}/packages/All/${pkgname}${PKGSUFFIX} && \
+    touch ${pb}/${arch}/${branch}/packages/All/${pkgname}${PKGSUFFIX}
+  rm -f ${pb}/${arch}/${branch}/errors/${pkgname}.log
+  lockf ${pb}/${arch}/${branch}/failure.lock ${pb}/scripts/buildsuccess ${arch} ${branch} ${pkgname}
+  if grep -q "even though it is marked BROKEN" ${pb}/${arch}/${branch}/logs/$pkgname.log; then
+    echo | mail -s "${pkgname} BROKEN but built on ${arch} ${branch}" kris@FreeBSD.org
+  fi
+else
+  log=${pb}/${arch}/${branch}/errors/${pkgname}.log
+  scp root@${host}:${chroot}/tmp/${pkgname}.log ${log} || (echo ${chroot}@${host}; ssh -a -n root@${host} ls -laR ${chroot}/tmp) | mail -s "${pkgname} logfile not found" kris@FreeBSD.org
+  if ! grep -q "even though it is marked BROKEN" ${log}; then
+    tail -1000 ${log} | mail -s "${pkgname} failed on ${arch} ${branch}" kris@FreeBSD.org
+  fi
+  lockf ${pb}/${arch}/${branch}/failure.lock ${pb}/scripts/buildfailure ${arch} ${branch} ${pkgname}
+fi
+
+ssh -a -n root@${host} ${pb}/scripts/clean-chroot ${arch} ${branch} ${chroot} ${noclean}
+
+exit ${error}