Merge pull request #54 from fudger/master

Add little script to make pigpiod a system service

util/Findpigpio.cmake

@@ -1,5 +1,5 @@
 ################################################################################
-### Find the pigpio includes and shared libraries.
+### Find the pigpio shared libraries.
 ################################################################################
 
 # Find the path to the pigpio includes.
@@ -7,19 +7,24 @@ find_path(pigpio_INCLUDE_DIR
 	NAMES pigpio.h pigpiod_if.h pigpiod_if2.h
 	HINTS /usr/local/include)
 	
-# Find the path to the pigpio libraries.
+# Find the pigpio libraries.
 find_library(pigpio_LIBRARY 
-	NAMES libpigpio.so libpigpiod_if.so libpigpiod_if2.so
+	NAMES libpigpio.so
+	HINTS /usr/local/lib)
+find_library(pigpiod_if_LIBRARY 
+	NAMES libpigpiod_if.so
+	HINTS /usr/local/lib)
+find_library(pigpiod_if2_LIBRARY 
+	NAMES libpigpiod_if2.so
 	HINTS /usr/local/lib)
     
 # Set the pigpio variables to plural form to make them accessible for 
 # the paramount cmake modules.
 set(pigpio_INCLUDE_DIRS ${pigpio_INCLUDE_DIR})
 set(pigpio_INCLUDES     ${pigpio_INCLUDE_DIR})
-set(pigpio_LIBRARIES    ${pigpio_LIBRARY})
 
 # Handle REQUIRED, QUIET, and version arguments 
 # and set the <packagename>_FOUND variable.
 find_package_handle_standard_args(pigpio 
     DEFAULT_MSG 
-    pigpio_INCLUDE_DIR pigpio_LIBRARY)
+    pigpio_INCLUDE_DIR pigpio_LIBRARY pigpiod_if_LIBRARY pigpiod_if2_LIBRARY)

util/pigpiod

@@ -0,0 +1,31 @@
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:             pigpiod
+# Required-Start:
+# Required-Stop:
+# Default-Start:        2 3 4 5
+# Default-Stop:         0 1 6 
+# Short-Description:    pigpio daemon
+# Description:          pigpio daemon required to control GPIO pins via pigpio $
+### END INIT INFO
+
+# Actions
+case "$1" in
+  start)
+    pigpiod
+    ;;
+  stop)
+    pkill pigpiod
+    ;;
+  restart)
+    pkill pigpiod
+    pigpiod
+    ;;
+  *)
+    echo "Usage: $0 start" >&2
+    exit 3
+    ;;
+esac
+
+exit 0
+

util/readme.md

@@ -0,0 +1,31 @@
+This folder provides utility files for the pigpio library.
+
+### pigpiod
+
+`pigpiod` is a script that allows to run pigpiod as a Linux service with root privileges.
+The advantage of running pigpiod as a service is that pigpiod can be automatically launched on system startup.
+To automatically start pigpiod as a service, do the following:
+
++ Copy `pigpiod` from this directory to `/etc/init.d/`.
+
++ Make it executable: 
+  ```
+  sudo chmod +x /etc/init.d/pigpiod
+  ```
+
++ Tell update-rc.d to automatically start the pigpiod service on system startup:
+  ```
+  sudo update-rc.d pigpiod defaults
+  ```
+  
++ Now, you can start, stop, and restart pigpiod using
+  ```
+  sudo service pigpiod start
+  sudo service pigpiod stop
+  sudo service pigpiod restart
+  ```
+
+
+### Findpigpio.cmake
+
+`Findpigpio.cmake` is a script used by CMake to find out where the pigpio header and library files are located.