From f54a87b800d551bec4532a5d3bf124d02e167856 Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@tinc-vpn.org>
Date: Thu, 24 Sep 2015 21:53:49 +0200
Subject: [PATCH] Optionally install systemd service files.

If --with-systemd is given when running the configure script, two
systemd service files will be installed. There is a template
tinc@.service, which can be used to control individual instances of
tinc. For example:

systemctl enable tinc@foo

Will create an instance for tinc with netname foo. There is also a
tinc.service, which can be used to start and stop all instances at once.
---
 Makefile.am           |  2 +-
 configure.ac          | 14 +++++++++++++-
 systemd/Makefile.am   |  4 ++++
 systemd/tinc.service  | 20 ++++++++++++++++++++
 systemd/tinc@.service | 19 +++++++++++++++++++
 5 files changed, 57 insertions(+), 2 deletions(-)
 create mode 100644 systemd/Makefile.am
 create mode 100644 systemd/tinc.service
 create mode 100644 systemd/tinc@.service

diff --git a/Makefile.am b/Makefile.am
index c0014d50..177f5499 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,7 +2,7 @@
 
 AUTOMAKE_OPTIONS = gnu
 
-SUBDIRS =  src doc gui test
+SUBDIRS =  src doc gui test systemd
 
 ACLOCAL_AMFLAGS = -I m4
 
diff --git a/configure.ac b/configure.ac
index 04f16bf6..e6fd3b08 100644
--- a/configure.ac
+++ b/configure.ac
@@ -115,6 +115,17 @@ AC_ARG_WITH(windows2000,
   ]
 )
 
+AC_ARG_WITH(systemd,
+  AS_HELP_STRING([--with-systemd@<:@=DIR@:>@], [install systemd service files @<:@to DIR if specified@:>@]),
+  [ systemd=true; systemd_path="$with_systemd" ],
+  [ systemd=false ]
+)
+
+AS_IF([test "x$with_systemd" = "xyes"], [systemd_path="/lib/systemd/system"],
+      [AS_IF([test "x$with_systemd" = "xno"], [systemd=false])])
+
+AC_SUBST(systemd_path, $systemd_path)
+
 AM_CONDITIONAL(LINUX, test "$linux" = true)
 AM_CONDITIONAL(BSD, test "$bsd" = true)
 AM_CONDITIONAL(SOLARIS, test "$solaris" = true)
@@ -123,6 +134,7 @@ AM_CONDITIONAL(CYGWIN, test "$cygwin" = true)
 AM_CONDITIONAL(UML, test "$uml" = true)
 AM_CONDITIONAL(VDE, test "$vde" = true)
 AM_CONDITIONAL(TUNEMU, test "$tunemu" = true)
+AM_CONDITIONAL(WITH_SYSTEMD, test "$systemd" = true)
 
 AC_CACHE_SAVE
 
@@ -250,6 +262,6 @@ AC_ARG_ENABLE(jumbograms,
   ]
 )
 
-AC_CONFIG_FILES([Makefile src/Makefile doc/Makefile gui/Makefile test/Makefile])
+AC_CONFIG_FILES([Makefile src/Makefile doc/Makefile gui/Makefile test/Makefile systemd/Makefile])
 
 AC_OUTPUT
diff --git a/systemd/Makefile.am b/systemd/Makefile.am
new file mode 100644
index 00000000..a1bfe124
--- /dev/null
+++ b/systemd/Makefile.am
@@ -0,0 +1,4 @@
+if WITH_SYSTEMD
+systemddir = @systemd_path@
+dist_systemd_DATA = tinc.service tinc@.service
+endif
diff --git a/systemd/tinc.service b/systemd/tinc.service
new file mode 100644
index 00000000..d911fa78
--- /dev/null
+++ b/systemd/tinc.service
@@ -0,0 +1,20 @@
+# This is a mostly empty service, but allows commands like stop, start, reload
+# to propagate to all tinc@ service instances.
+
+[Unit]
+Description=Tinc VPN
+Documentation=info:tinc
+Documentation=man:tinc(8) man:tinc.conf(5)
+Documentation=http://tinc-vpn.org/docs/
+After=network.target
+Wants=network.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/bin/true
+ExecReload=/bin/true
+WorkingDirectory=/etc/tinc
+
+[Install]
+WantedBy=multi-user.target
diff --git a/systemd/tinc@.service b/systemd/tinc@.service
new file mode 100644
index 00000000..78ef25b1
--- /dev/null
+++ b/systemd/tinc@.service
@@ -0,0 +1,19 @@
+[Unit]
+Description=Tinc net %i
+Documentation=info:tinc
+Documentation=man:tinc(8) man:tinc.conf(5)
+Documentation=http://tinc-vpn.org/docs/
+PartOf=tinc.service
+ReloadPropagatedFrom=tinc.service
+
+[Service]
+Type=simple
+WorkingDirectory=/etc/tinc/%i
+ExecStart=/usr/sbin/tincd -n %i -D
+ExecReload=/usr/sbin/tinc -n %i reload
+Restart=on-failure
+RestartSec=5
+TimeoutStopSec=5
+
+[Install]
+WantedBy=tinc.service