introduced a wrapper script to either directly call an existing

'timeout' command (e.g. on RaspberryMatic) or to use shell syntax to
replicate the same functionality just using shell functionality. This
should hopefully solve any licensing issues between GPL and Apache2
license under which this check_mk_agent is licensed.

addon/addon/server.tcl

@@ -34,10 +34,10 @@ proc handle_connection { channelId clientAddress clientPort } {
 
     if { [file exists /proc/net/tcp6] == 1 } {
         puts $channelId "<<<tcp_conn_stats>>>"
-        puts $channelId "[exec /usr/local/addons/check_mk_agent/timeout -s 1 10 cat /proc/net/tcp /proc/net/tcp6 2>/dev/null | awk { /:/ { c[$4]++; } END { for (x in c) { print x, c[x]; } } }]"
+        puts $channelId "[exec /usr/local/addons/check_mk_agent/timeout -s 1 -t 10 cat /proc/net/tcp /proc/net/tcp6 2>/dev/null | awk { /:/ { c[$4]++; } END { for (x in c) { print x, c[x]; } } }]"
     } else {
         puts $channelId "<<<tcp_conn_stats>>>"
-        puts $channelId "[exec /usr/local/addons/check_mk_agent/timeout -s 1 10 cat /proc/net/tcp 2>/dev/null | awk { /:/ { c[$4]++; } END { for (x in c) { print x, c[x]; } } }]"
+        puts $channelId "[exec /usr/local/addons/check_mk_agent/timeout -s 1 -t 10 cat /proc/net/tcp 2>/dev/null | awk { /:/ { c[$4]++; } END { for (x in c) { print x, c[x]; } } }]"
     }
 
     puts $channelId "<<<lnx_if>>>"
@@ -67,10 +67,10 @@ proc handle_connection { channelId clientAddress clientPort } {
 
     if { [file exists /bin/stat] == 1 } {
       puts $channelId "<<<nfsmounts>>>"
-      puts $channelId [exec sh -c {sed -n '/ nfs4\? /s/[^ ]* \([^ ]*\) .*/\1/p' </proc/mounts | sed 's/\\040/ /g' | while read MP; do /usr/local/addons/check_mk_agent/timeout -s 9 5 stat -f -c "$MP ok %b %f %a %s" "$MP" || echo "$MP hanging 0 0 0 0"; done}]
+      puts $channelId [exec sh -c {sed -n '/ nfs4\? /s/[^ ]* \([^ ]*\) .*/\1/p' </proc/mounts | sed 's/\\040/ /g' | while read MP; do /usr/local/addons/check_mk_agent/timeout -s 9 -t 5 stat -f -c "$MP ok %b %f %a %s" "$MP" || echo "$MP hanging 0 0 0 0"; done}]
 
       puts $channelId "<<<cifsmounts>>>"
-      puts $channelId [exec sh -c {sed -n '/ cifs\? /s/[^ ]* \([^ ]*\) .*/\1/p' </proc/mounts | sed 's/\\040/ /g' | while read MP; do if [ ! -r "$MP" ]; then echo "$MP Permission denied"; else /usr/local/addons/check_mk_agent/timeout -s 9 2 stat -f -c "$MP ok %b %f %a %s" "$MP" || echo "$MP hanging 0 0 0 0"; fi; done}]
+      puts $channelId [exec sh -c {sed -n '/ cifs\? /s/[^ ]* \([^ ]*\) .*/\1/p' </proc/mounts | sed 's/\\040/ /g' | while read MP; do if [ ! -r "$MP" ]; then echo "$MP Permission denied"; else /usr/local/addons/check_mk_agent/timeout -s 9 -t 2 stat -f -c "$MP ok %b %f %a %s" "$MP" || echo "$MP hanging 0 0 0 0"; fi; done}]
     }
 
     puts $channelId "<<<ps>>>"
@@ -82,12 +82,12 @@ proc handle_connection { channelId clientAddress clientPort } {
 
     if { [file exists /usr/bin/ntpq] == 1 } {
         puts $channelId "<<<ntp>>>"
-        puts $channelId "[exec /usr/local/addons/check_mk_agent/timeout 5 /usr/bin/ntpq -np | sed -e 1,2d -e {s/^\(.\)/\1 /} -e {s/^ /%/}]"
+        puts $channelId "[exec /usr/local/addons/check_mk_agent/timeout -t 5 /usr/bin/ntpq -np | sed -e 1,2d -e {s/^\(.\)/\1 /} -e {s/^ /%/}]"
     }
 
     if { [file exists /usr/bin/chronyc] == 1 } {
         puts $channelId "<<<chrony>>>"
-        puts $channelId "[exec /usr/local/addons/check_mk_agent/timeout 5 /usr/bin/chronyc -n tracking]"
+        puts $channelId "[exec /usr/local/addons/check_mk_agent/timeout -t 5 /usr/bin/chronyc -n tracking]"
     }
 
     puts $channelId "<<<homematic:sep(59)>>>"

addon/addon/timeout

@@ -0,0 +1,53 @@
+#!/bin/sh
+#
+# wrapper script to either directly call /usr/bin/timeout or to simply
+# call an own shell-based implementation. This script is CCU2, CCU3 and
+# RaspberryMatic compatible.
+#
+# Copyright (c) 2019 Jens Maus <mail@jens-maus.de>
+# Apache 2.0 License applies.
+#
+
+# if a BusyBox timeout command is already present we use that
+# one. Instead we use shell functionality to replicate the same
+# functionality in terminating commands after a certain amount
+# of time.
+if [[ -n "$(type -p timeout 2>&1)" ]]; then
+  timeout "$@"
+  exit $?
+else
+  # default values
+  maxtime=10
+  signal=SIGTERM
+
+  # Options
+  O=$(getopt -- :t:s: "$@") || exit 1
+  eval set -- "${O}"
+  while true; do
+    case "${1}" in
+      -t) maxtime=${2}; shift 2;;
+      -s) signal=${2}; shift 2;;
+      --) shift; break;;
+      *)  exit 1;;
+    esac
+  done
+
+  # lets sleep first
+  sleep "${maxtime}" &
+  SPID=${!}
+
+  # execute the actual command
+  ("$@"; RETVAL=$?; kill ${SPID}; exit ${RETVAL}) &
+  CPID=${!}
+  wait %1
+  SLEEPRETVAL=$?
+  if [[ ${SLEEPRETVAL} -eq 0 ]] && kill -${signal} ${CPID} >/dev/null 2>&1 ; then
+    RETVAL=143
+    #(sleep 1; kill -9 ${CPID} >/dev/null 2>&1)&
+    wait %2
+  else
+    wait %2
+    RETVAL=$?
+  fi
+  exit $RETVAL
+fi

addon/rc.d/check_mk_agent

@@ -8,12 +8,6 @@ RCDDIR=/usr/local/etc/config/rc.d
 case "$1" in
 
   ""|start)
-    rm -f /usr/local/addons/${ADDONNAME}/timeout 2>/dev/null
-    if [ "$(uname -m)" == "armv5tejl" ]; then
-      ln -s /usr/local/addons/${ADDONNAME}/timeout-ccu2 /usr/local/addons/${ADDONNAME}/timeout
-    else
-      ln -s /usr/local/addons/${ADDONNAME}/timeout-ccu3 /usr/local/addons/${ADDONNAME}/timeout
-    fi
     tclsh $ADDONDIR/server.tcl &
     ;;