bpfilter: add systemd service file

Configure and install a systemd service file to manage the daemon.

Author: qdeslandes

src/bpfilter/CMakeLists.txt

@@ -4,6 +4,12 @@
 find_package(PkgConfig REQUIRED)
 pkg_check_modules(nl REQUIRED IMPORTED_TARGET libnl-3.0)
 
+configure_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/bpfilter.service.in
+    ${CMAKE_BINARY_DIR}/output/usr/lib/systemd/system/bpfilter.service
+    @ONLY
+)
+
 add_executable(bpfilter
     ${CMAKE_CURRENT_SOURCE_DIR}/main.c
     ${CMAKE_CURRENT_SOURCE_DIR}/cgen/cgen.h              ${CMAKE_CURRENT_SOURCE_DIR}/cgen/cgen.c
@@ -53,3 +59,9 @@ target_link_libraries(bpfilter
 install(TARGETS bpfilter
     DESTINATION ${CMAKE_INSTALL_SBINDIR}
 )
+
+message("${CMAKE_INSTALL_PREFIX}")
+install(
+    FILES ${CMAKE_BINARY_DIR}/output/usr/lib/systemd/system/bpfilter.service
+    DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/systemd/system
+)

src/bpfilter/bpfilter.service.in

@@ -0,0 +1,9 @@
+[Unit]
+Description=BPF-based packet filtering framework
+
+[Service]
+ExecStart=/usr/sbin/bpfilter --no-nftables --no-iptables
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target