add check_fs_writable

check_fs_writable

+#!/usr/bin/env bash
+# ======================================================================
+#
+# Check filesystem ... is it readonly?
+#
+# requirements:
+# - none
+#
+# ----------------------------------------------------------------------
+# 2021-03-23  v0.0  <axel.hahn@iml.unibe.ch>
+# ======================================================================
+
+
+. `dirname $0`/inc_pluginfunctions
+
+dirs2test="/tmp /var/tmp"
+out=""
+
+# ----------------------------------------------------------------------
+# functions
+# ----------------------------------------------------------------------
+
+function showHelp(){
+cat <<EOF
+______________________________________________________________________
+
+CHECK_FS_READONLY check if filesystem is readonly - v0.0
+
+(c) Institute for Medical Education - Univerity of Bern
+Licence: GNU GPL 3
+______________________________________________________________________
+
+
+SYNTAX:
+`basename $0` [directory [more directories]]
+
+OPTIONS:
+
+    -h or --help   show this help.
+
+PARAMETERS:
+
+    DIRECTORY where to touch a temporary file
+
+EXAMPLE:
+`basename $0` /tmp /root /var/www
+
+EOF
+}
+# ----------------------------------------------------------------------
+# MAIN
+# ----------------------------------------------------------------------
+
+# --- check required tools
+# ph.require bc top
+
+
+# --- check param -h
+case "$1" in
+    "--help"|"-h")
+        showHelp
+        exit 0
+        ;;
+    *)
+esac
+
+# params are directory names ... if a param was given it overrides the internal default
+test $# -gt 0 && dirs2test="$*"
+
+
+# ----- MAKE CHECK
+
+for mydir in $dirs2test
+do
+  touchfile=$mydir/icinga_touch_testfile__${RANDOM}_${RANDOM}
+  out="$out
+
+--- touching something into $mydir
+  $( touch $touchfile && ls -l $touchfile && rm -f $touchfile 2>&1 )"
+  if [ $? -ne 0 ]; then
+    ph.setStatus "critical"
+  fi
+done
+
+
+# ----- OUTPUT
+
+ph.status "check if filesystem is writable in $dirs2test $out"
+#echo "$out"
+
+
+# ----- CLEANUP AND BYE!
+
+ph.exit
+
+# ----------------------------------------------------------------------