Create path-loss.sh

path-loss.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# rburkholder@quovadis.bm
+# raymond@burkholder.net
+
+# user defined settings
+txtEmail="user@example.com"
+txtSubject="Path Loss Report"
+txtSeparator="==============================\n"
+nTrigger=4
+nAttempts=5
+
+declare -A nodes
+nodes=( \
+  [8.8.8.8]="google1" \
+  [8.8.4.4]="google2" \
+  )
+
+# local variables
+cntFailures=0
+status=""
+tmpLog=$(mktemp)
+tmpPing=$(mktemp)
+
+# preload output
+date > ${tmpLog}
+
+# loop through nodes nd test
+for node in  ${!nodes[*]}; do
+  echo -e ${txtSeparator} >> ${tmpLog};
+  echo "checking node ${nodes[${node}]}:" >> ${tmpLog};
+  echo "" >> ${tmpLog}
+  ping -W 1 -c ${nAttempts} ${node} > ${tmpPing}
+  cat ${tmpPing} >> ${tmpLog}
+  value=$(grep transmitted ${tmpPing} | cut -d ' ' -f 4)
+  if [[ nTrigger -ge value ]]; then
+    ((cntFailures++));
+    mtr -w -b --report ${node} >> ${tmpLog};
+    status="${status} ${nodes[${node}]}"
+  fi
+done
+
+# footer
+echo -e ${txtSeparator} >> ${tmpLog};
+date >> ${tmpLog}
+
+# notify on failure
+if [[ cntFailures -gt 0 ]]; then
+  cat ${tmpLog} | mail -s "${txtSubject}:${status}" ${txtEmail};
+fi
+
+# clean up
+rm ${tmpLog}
+rm ${tmpPing}