KurtGramlich/BashScripte

# waehlt aus einem Verzeichnis eine Datei durch Zufall aus                                                                                                               
#  060421 Kurt Gramlich                                                                                                                                                  
#  GPL Software Schnipsel                                                                                                                                                
#                                                                                                                                                                                                                                                                                                                                       
                                                                                                                                                                         
DIR="/home/kurt/skole/images/automat"                                                                                                                                    
DEST_DIR="/home/kurt/skole/images/titelfoto"                                                                                                                             
                                                                                                                                                                         
NR_FILES=$(ls $DIR | wc -l)                                                                                                                                              
                                                                                                                                                                         
RANGE=$NR_FILES                                                                                                                                                          
                                                                                                                                                                         
SEED=$(head -1 /dev/urandom | od -N 1 | awk '{ print $2 }')                                                                                                              
                                                                                                                                                                         
number=$SEED                                                                                                                                                             
                                                                                                                                                                         
let "number %= $RANGE"                                                                                                                                                   
                                                                                                                                                                         
echo "Random is $number"                                                                                                                                                 
                                                                                                                                                                         
let "number = $number +1"                                                                                                                                                
                                                                                                                                                                         
echo "Number of files is $NR_FILES"                                                                                                                                      
                                                                                                                                                                         
echo "Random is $number"                                                                                                                                                 
                                                                                                                                                                         
RND_FILE=$(echo $(ls $DIR) | awk -v RANDOM=$number '{print $RANDOM }')                                                                                                   
                                                                                                                                                                         
echo "Random file is $RND_FILE"                                                                                                                                          
                                                                                                                                                                         
cp $DIR/$RND_FILE $DEST_DIR/titel.jpg                                                                                                                                    
                                                                                                                                                                         
exit 0