init I

000_CaH_Tests/last_change

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+2020-03-19 14:37:28.484385089k

000_CaH_Tests/test1.sh

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+#!/bin/bash
+
+# Scripts checks whether 'testfile' has been modified and prints result
+
+# File 'last_change' contains last saved modification date-time of 'testfile'
+# and gets updated if 'stat testfile' shows a different modification date
+
+# stdin stdout stderr
+
+DIR=`dirname $0` > /dev/null
+pushd $DIR > /dev/null
+
+# file 'testfile' not a regular file? exit with error
+if [ ! -f testfile ]
+then
+   echo "Datei nicht gefunden"
+   echo "Ende mit Fehlercode 1"
+   popd > /dev/null
+   exit 1
+fi
+
+# File 'testfile' found
+# get 'testfile' modified date-time
+modified=`stat testfile | grep -i modi | awk -F' ' '{ print $2 " " $3 }'`
+
+# get date-time from change before
+last_modified=`cat last_change`
+# ` Backtick
+
+# if both date-time equal no change!
+if [ "$modified" == "$last_modified" ]
+then
+   echo "Datei nicht modifiziert!"
+else
+   # not equal: file changed
+   echo "Datei modifiziert!"
+   # save last modified
+   echo "$modified" > last_change
+fi
+
+popd > /dev/null
+exit 0

000_CaH_Tests/test2.sh

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+hallo

000_CaH_Tests/testfile

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+jjj