Make systemd swap hack run on Ubuntu 15.

So, the scripts are now in clientside/tmcc/linux since they're the same
for any systemd-based Linux, and the centos7 and ubuntu15 makefiles
install those files.

Also had to improve fixup-fstab-swaps to handle the case where the / is
something like /dev/disk/by-uuid/<UUID> which is a symlink to the real
dev.  So try readlink -f to handle that.

clientside/tmcc/centos7/GNUmakefile.in

@@ -87,7 +87,7 @@ common-install:	dir-install
 	@echo "no centos-specific common files"
 
 bin-install:	dir-install
-	$(INSTALL) -m 755 $(SRCDIR)/emulab-systemd-swaps $(BINDIR)
+	$(INSTALL) -m 755 $(SRCDIR)/../linux/emulab-systemd-swaps $(BINDIR)
 	@echo "centos7 systemd swap.service"
 
 etc-install:	dir-install sysetc-remove sysetc-install
@@ -107,7 +107,7 @@ sysetc-install:	ifcfgs dir-install
 	$(INSTALL) -m 644 ifcfg-eth[0-9]* $(SYSETCDIR)/sysconfig/network-scripts
 	$(INSTALL) -m 744 $(SRCDIR)/ifup-emulabcnet $(SYSETCDIR)/sysconfig/network-scripts
 	$(INSTALL) -m 644 $(SRCDIR)/logrotate-syslog $(SYSETCDIR)/logrotate.d/syslog
-	$(INSTALL) -m 644 $(SRCDIR)/emulab-fstab-fixup.service $(SYSETCDIR)/systemd/system
+	$(INSTALL) -m 644 $(SRCDIR)/../linux/emulab-fstab-fixup.service $(SYSETCDIR)/systemd/system
 	$(INSTALL) -m 644 $(SRCDIR)/ntpd.service $(SYSETCDIR)/systemd/system
 	rm -f $(SYSETCDIR)/systemd/system/multi-user.target.wants/ntpd.service
 	systemctl enable emulab-fstab-fixup.service

clientside/tmcc/linux/fixup-fstab-swaps

@@ -128,7 +128,19 @@ sub findswaps()
     my $rootfs = `df / | grep /dev/`;
     if ($rootfs =~ /^(\/dev\/[a-z]+)\d+/) {
 	$rdisk = $1;
-    } else {
+    }
+    elsif ($rootfs =~ /^(\/dev\/[^\s]+)\s/) {
+	$rootfs = `readlink -f $1`;
+	if ($rootfs =~ /^(\/dev\/[a-z]+)\d+/) {
+	    $rdisk = $1;
+	}
+	else {
+	    print STDERR "*** WARNING: could not identify root disk, ".
+		"no swap enabled\n";
+	    return;
+	}
+    }
+    else {
 	print STDERR "*** WARNING: could not identify root disk, ".
 	    "no swap enabled\n";
 	return;

clientside/tmcc/ubuntu15/GNUmakefile.in

@@ -56,7 +56,7 @@ COMMON		= $(SRCDIR)/../common
 DEFRUNLVLDIR   ?= $(SYSETCDIR)/rc3.d
 
 install client-install:	common-install etc-install \
-			script-install bin-install sysetc-fixup
+			script-install bin-install sysetc-fixup systemd-fixup
 	@echo "Remember to install the PEM files if necessary"
 
 simple-install:	common-install script-install bin-install
@@ -73,6 +73,8 @@ common-install:	dir-install
 bin-install:	dir-install
 	(cd ../linux; $(MAKE) DESTDIR=$(DESTDIR) RCDIR=$(RCDIR) bin-install)
 	$(INSTALL) -m 755 $(SRCDIR)/findcnet $(BINDIR)/findcnet
+	$(INSTALL) -m 755 $(SRCDIR)/../linux/emulab-systemd-swaps $(BINDIR)
+	@echo "Emulab systemd swap.service"
 
 etc-install:	dir-install common-sysetc-install
 	$(INSTALL) -m 644 $(SRCDIR)/group $(ETCDIR)/group
@@ -106,6 +108,9 @@ systemd-fixup:
 	rm -f /lib/systemd/system/network-online.target.wants/ifup-wait-all-auto.service
 	ln -sf ../ifup-wait-emulab-cnet.service \
 		/lib/systemd/system/network-online.target.wants/ifup-wait-emulab-cnet.service
+	$(INSTALL) -m 644 $(SRCDIR)/../linux/emulab-fstab-fixup.service \
+		/lib/systemd/system
+	systemctl enable emulab-fstab-fixup.service
 
 script-install:	dir-install $(SCRIPTS)
 	(cd ../linux; $(MAKE) DESTDIR=$(DESTDIR) RCDIR=$(RCDIR) script-install)