Add init.d files to debian/redhat packages.

Add init.d scripts to debian/redhat packages as well as
postinstall/remove scripts to enable the falco service on install and
disable it on uninstall.

I still need to add support for daemonization to falco, and change the
default output options to match the expected use of being daemonized.

CMakeCPackOptions.cmake

@@ -1,3 +1,13 @@
+if(CPACK_GENERATOR MATCHES "DEB")
+	list(APPEND CPACK_INSTALL_COMMANDS "mkdir -p _CPack_Packages/${CPACK_TOPLEVEL_TAG}/${CPACK_GENERATOR}/${CPACK_PACKAGE_FILE_NAME}/etc/init.d/")
+	list(APPEND CPACK_INSTALL_COMMANDS "cp scripts/debian/falco _CPack_Packages/${CPACK_TOPLEVEL_TAG}/${CPACK_GENERATOR}/${CPACK_PACKAGE_FILE_NAME}/etc/init.d")
+endif()
+
+if(CPACK_GENERATOR MATCHES "RPM")
+	list(APPEND CPACK_INSTALL_COMMANDS "mkdir -p _CPack_Packages/${CPACK_TOPLEVEL_TAG}/${CPACK_GENERATOR}/${CPACK_PACKAGE_FILE_NAME}/etc/rc.d/init.d/")
+	list(APPEND CPACK_INSTALL_COMMANDS "cp scripts/rpm/falco _CPack_Packages/${CPACK_TOPLEVEL_TAG}/${CPACK_GENERATOR}/${CPACK_PACKAGE_FILE_NAME}/etc/rc.d/init.d")
+endif()
+
 if(CPACK_GENERATOR MATCHES "TGZ")
 	set(CPACK_SET_DESTDIR "ON")
 	set(CPACK_STRIP_FILES "OFF")

CMakeLists.txt

@@ -181,6 +181,7 @@ add_subdirectory(${SYSDIG_DIR}/userspace/libscap ${PROJECT_BINARY_DIR}/userspace
 add_subdirectory(${SYSDIG_DIR}/userspace/libsinsp ${PROJECT_BINARY_DIR}/userspace/libsinsp)
 
 add_subdirectory(rules)
+add_subdirectory(scripts)
 add_subdirectory(userspace/falco)
 
 
@@ -192,18 +193,22 @@ set(CPACK_PACKAGE_VERSION "${FALCO_VERSION}")
 set(CPACK_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}-${CMAKE_SYSTEM_PROCESSOR}")
 set(CPACK_PROJECT_CONFIG_FILE "${PROJECT_SOURCE_DIR}/CMakeCPackOptions.cmake")
 set(CPACK_STRIP_FILES "ON")
+set(CPACK_PACKAGE_RELOCATABLE "OFF")
 
 set(CPACK_GENERATOR DEB RPM TGZ)
 
 set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Sysdig <support@sysdig.com>")
 set(CPACK_DEBIAN_PACKAGE_SECTION "utils")
-
 set(CPACK_DEBIAN_PACKAGE_HOMEPAGE "http://www.sysdig.org")
 set(CPACK_DEBIAN_PACKAGE_DEPENDS "sysdig")
+set(CPACK_DEBIAN_PACKAGE_CONTROL_EXTRA "${PROJECT_SOURCE_DIR}/scripts/debian/postinst;${PROJECT_SOURCE_DIR}/scripts/debian/prerm;${PROJECT_SOURCE_DIR}/scripts/debian/postrm")
 
 set(CPACK_RPM_PACKAGE_LICENSE "GPLv2")
 set(CPACK_RPM_PACKAGE_URL "http://www.sysdig.org")
 set(CPACK_RPM_PACKAGE_REQUIRES "sysdig")
+set(CPACK_RPM_POST_INSTALL_SCRIPT_FILE "${PROJECT_SOURCE_DIR}/scripts/rpm/postinstall")
+set(CPACK_RPM_PRE_UNINSTALL_SCRIPT_FILE "${PROJECT_SOURCE_DIR}/scripts/rpm/preuninstall")
+set(CPACK_RPM_POST_UNINSTALL_SCRIPT_FILE "${PROJECT_SOURCE_DIR}/scripts/rpm/postuninstall")
 set(CPACK_RPM_EXCLUDE_FROM_AUTO_FILELIST_ADDITION /usr/src /usr/share/man /usr/share/man/man8)
 
 include(CPack)

scripts/CMakeLists.txt

@@ -0,0 +1,5 @@
+file(COPY ${PROJECT_SOURCE_DIR}/scripts/debian/falco
+	DESTINATION ${PROJECT_BINARY_DIR}/scripts/debian)
+
+file(COPY ${PROJECT_SOURCE_DIR}/scripts/rpm/falco
+	DESTINATION ${PROJECT_BINARY_DIR}/scripts/rpm)

scripts/debian/falco

@@ -0,0 +1,156 @@
+#! /bin/sh
+### BEGIN INIT INFO
+# Provides:          falco
+# Required-Start:    $remote_fs $syslog
+# Required-Stop:     $remote_fs $syslog
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Falco syscall activity monitoring agent
+# Description:       Falco is a system activity monitoring agent
+#                    driven by system calls with support for containers.
+### END INIT INFO
+
+# Author: Sysdig <support@sysdig.com>
+
+# Do NOT "set -e"
+
+# PATH should only include /usr/* if it runs after the mountnfs.sh script
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+DESC="Falco"
+NAME=falco
+DAEMON=/usr/bin/$NAME
+PIDFILE=/var/run/$NAME.pid
+DAEMON_ARGS="--daemon --falcopid=$PIDFILE"
+SCRIPTNAME=/etc/init.d/$NAME
+
+# Exit if the package is not installed
+[ -x "$DAEMON" ] || exit 0
+
+# Read configuration variable file if it is present
+[ -r /etc/default/$NAME ] && . /etc/default/$NAME
+
+# Load the VERBOSE setting and other rcS variables
+. /lib/init/vars.sh
+
+# Define LSB log_* functions.
+# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
+# and status_of_proc is working.
+. /lib/lsb/init-functions
+
+#
+# Function that starts the daemon/service
+#
+do_start()
+{
+	# Return
+	#   0 if daemon has been started
+	#   1 if daemon was already running
+	#   2 if daemon could not be started
+	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
+		|| return 1
+	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
+		$DAEMON_ARGS \
+		|| return 2
+	# Add code here, if necessary, that waits for the process to be ready
+	# to handle requests from services started subsequently which depend
+	# on this one.  As a last resort, sleep for some time.
+}
+
+#
+# Function that stops the daemon/service
+#
+do_stop()
+{
+	# Return
+	#   0 if daemon has been stopped
+	#   1 if daemon was already stopped
+	#   2 if daemon could not be stopped
+	#   other if a failure occurred
+	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
+	RETVAL="$?"
+	[ "$RETVAL" = 2 ] && return 2
+	# Wait for children to finish too if this is a daemon that forks
+	# and if the daemon is only ever run from this initscript.
+	# If the above conditions are not satisfied then add some other code
+	# that waits for the process to drop all resources that could be
+	# needed by services started subsequently.  A last resort is to
+	# sleep for some time.
+	start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
+	[ "$?" = 2 ] && return 2
+	# Many daemons don't delete their pidfiles when they exit.
+	rm -f $PIDFILE
+	return "$RETVAL"
+}
+
+#
+# Function that sends a SIGHUP to the daemon/service
+#
+do_reload() {
+	#
+	# If the daemon can reload its configuration without
+	# restarting (for example, when it is sent a SIGHUP),
+	# then implement that here.
+	#
+	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
+	return 0
+}
+
+case "$1" in
+  start)
+	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
+	do_start
+	case "$?" in
+		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+	esac
+	;;
+  stop)
+	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
+	do_stop
+	case "$?" in
+		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+	esac
+	;;
+  status)
+	status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
+	;;
+  #reload|force-reload)
+	#
+	# If do_reload() is not implemented then leave this commented out
+	# and leave 'force-reload' as an alias for 'restart'.
+	#
+	#log_daemon_msg "Reloading $DESC" "$NAME"
+	#do_reload
+	#log_end_msg $?
+	#;;
+  restart|force-reload)
+	#
+	# If the "reload" option is implemented then remove the
+	# 'force-reload' alias
+	#
+	log_daemon_msg "Restarting $DESC" "$NAME"
+	do_stop
+	case "$?" in
+	  0|1)
+		do_start
+		case "$?" in
+			0) log_end_msg 0 ;;
+			1) log_end_msg 1 ;; # Old process is still running
+			*) log_end_msg 1 ;; # Failed to start
+		esac
+		;;
+	  *)
+		# Failed to stop
+		log_end_msg 1
+		;;
+	esac
+	;;
+  *)
+	#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
+	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
+	exit 3
+	;;
+esac
+
+:

scripts/debian/postinst

@@ -0,0 +1,16 @@
+#!/bin/sh
+set -e
+
+NAME=falco
+
+if [ -x "/etc/init.d/$NAME" ]; then
+        update-rc.d $NAME defaults >/dev/null
+fi
+
+if [ -x "/etc/init.d/$NAME" ]; then
+        if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
+                invoke-rc.d $NAME start || exit $?
+        else
+                /etc/init.d/$NAME start || exit $?
+        fi
+fi

scripts/debian/postrm

@@ -0,0 +1,8 @@
+#!/bin/sh
+set -e
+
+NAME=falco
+
+if [ "$1" = "purge" ] ; then
+	update-rc.d $NAME remove >/dev/null
+fi

scripts/debian/prerm

@@ -0,0 +1,13 @@
+#!/bin/sh
+set -e
+
+NAME=falco
+
+if [ -x "/etc/init.d/$NAME" ]; then
+		if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
+				invoke-rc.d $NAME stop || exit $?
+		else
+				/etc/init.d/$NAME stop || exit $?
+		fi
+fi
+

scripts/rpm/falco

@@ -0,0 +1,105 @@
+#!/bin/sh
+#
+# falco syscall monitoring agent
+#
+# chkconfig:   2345 55 45
+# description: Falco syscall monitoring agent
+#
+
+### BEGIN INIT INFO
+# Provides: 
+# Required-Start: 
+# Required-Stop: 
+# Should-Start: 
+# Should-Stop: 
+# Default-Start: 
+# Default-Stop: 
+# Short-Description: 
+# Description:      
+### END INIT INFO
+
+# Source function library.
+. /etc/rc.d/init.d/functions
+
+exec="/usr/bin/falco"
+prog="falco"
+# config="<path to major config file>"
+
+[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog
+
+lockfile=/var/lock/subsys/$prog
+pidfile="/var/run/falco.pid"
+
+start() {
+    [ -x $exec ] || exit 5
+    # [ -f $config ] || exit 6
+    echo -n $"Starting $prog: "
+    daemon $exec --daemon --falcopid=$pidfile
+    retval=$?
+    echo
+    [ $retval -eq 0 ] && touch $lockfile
+    return $retval
+}
+
+stop() {
+    echo -n $"Stopping $prog: "
+    killproc -p $pidfile
+    retval=$?
+    echo
+    [ $retval -eq 0 ] && rm -f $lockfile
+    return $retval
+}
+
+restart() {
+    stop
+    start
+}
+
+reload() {
+    restart
+}
+
+force_reload() {
+    restart
+}
+
+rh_status() {
+    status -p $pidfile $prog
+}
+
+rh_status_q() {
+    rh_status >/dev/null 2>&1
+}
+
+
+case "$1" in
+    start)
+        rh_status_q && exit 0
+        $1
+        ;;
+    stop)
+        rh_status_q || exit 0
+        $1
+        ;;
+    restart)
+        $1
+        ;;
+    reload)
+        rh_status_q || exit 7
+        $1
+        ;;
+    force-reload)
+        force_reload
+        ;;
+    status)
+        rh_status
+        ;;
+    condrestart|try-restart)
+        rh_status_q || exit 0
+        restart
+        ;;
+    *)
+        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
+        exit 2
+esac
+exit $?

scripts/rpm/postinstall

@@ -0,0 +1 @@
+/sbin/chkconfig --add falco

scripts/rpm/postuninstall

@@ -0,0 +1,3 @@
+if [ "$1" -ge "1" ]; then
+	/sbin/service falco condrestart > /dev/null 2>&1
+fi

scripts/rpm/preuninstall

@@ -0,0 +1,4 @@
+if [ $1 = 0 ]; then
+	/sbin/service falco stop > /dev/null 2>&1
+	/sbin/chkconfig --del falco
+fi