OS - FUSE (test symlinks)

#!/bin/bash

# to run please change mode
# chmod +x check_dir.bash

if [ "$#" -ne 1 ]; then
    echo "Illegal number of parameters"
    echo 'Call : ./check_dir.sh mounted_dir'
    exit 1
fi

MOUNT_DIR=$1
cd $MOUNT_DIR


CMD="#### Command : "

test1(){
    echo "Test 1 : link two files"
    echo

    FILE1="file.txt"
    FILE2="file_to_link.txt"
    CONTENT="Test for linking..."

    echo "$CMD echo $CONTENT > $FILE1"
    echo "$CONTENT" > $FILE1
    echo

    echo "$CMD ln -s $FILE1 $FILE2"
    ln -s $FILE1 $FILE2
    echo

    echo "$CMD ls -l"
    ls --color=auto -l
    echo

    echo "$CMD cat $FILE1"
    cat $FILE1
    echo

    echo "$CMD cat $FILE2"
    cat $FILE2
    echo

    echo "Done!"
    echo
}

test2(){
    echo "Test 2 : link two files inside same directory"

    mkdir test2_dir
    cd test2_dir
    mkdir dir
    cd dir

    FILE1="file.txt"
    FILE2="file_to_link.txt"
    CONTENT="Test for linking inside directories..."

    echo "$CMD echo $CONTENT > $FILE1"
    echo "$CONTENT" > $FILE1
    echo

    echo "$CMD ln -s $FILE1 $FILE2"
    ln -s $FILE1 $FILE2
    echo

    echo "$CMD ls -l"
    ls --color=auto -l
    echo

    echo "$CMD cat $FILE1"
    cat $FILE1
    echo

    echo "$CMD cat $FILE2"
    cat $FILE2
    echo

    cd ..
    cd ..

    echo "Done!"
    echo
}

test3(){
    echo "Test 3 : link two files inside different directory"

    mkdir test3_dir
    cd test3_dir
    mkdir dir1

    FILE1="dir1/file.txt"
    FILE2="file_to_link.txt"
    CONTENT="Test for linking inside directories..."

    echo "$CMD echo $CONTENT > $FILE1"
    echo "$CONTENT" > $FILE1
    echo

    echo "$CMD ln -s $FILE1 $FILE2"
    ln -s $FILE1 $FILE2
    echo

    echo "$CMD ls -l"
    ls --color=auto -l
    echo

    echo "$CMD cat $FILE1"
    cat $FILE1
    echo

    echo "$CMD cat $FILE2"
    cat $FILE2
    echo

    echo "Done!"
    echo
}

test4(){
    echo "Test 2 : link multiple files"
    echo

    FILE="file_mm.txt"
    FILE_MM="file_to_link_mm.txt"
    CONTENT="TEST FOR MULTIPLE"

    echo "$CMD echo $CONTENT > $FILE"
    echo $CONTENT > $FILE
    echo

    echo "$CMD ln -s $FILE $FILE_MM$((0))"
    ln -s $FILE $FILE_MM$((0))
    echo

    MAX_NUM=9
    for t in $(seq 0 $((MAX_NUM-1)))
    do
        echo "$CMD ln -s $FILE_MM$t $FILE_MM$((t+1))"
        ln -s $FILE_MM$t $FILE_MM$((t+1))
    done;

    echo
    echo "$CMD ls -l"
    ls --color=auto -l
    echo

    echo "$CMD cat $FILE_MM$MAX_NUM"
    cat $FILE_MM$MAX_NUM
    echo

    echo "Done!"
    echo
}

test5(){
    echo "Test 3 : link direcotires"

    DIR="dir"
    DIR_TO_LINK="dir_to_link"

    mkdir $DIR
    mkdir $DIR/a
    mkdir $DIR/b
    mkdir $DIR/c
    mkdir $DIR/d
    touch $DIR/file

    echo "$CMD ln -s $DIR $DIR_TO_LINK"
    ln -s $DIR $DIR_TO_LINK
    echo

    echo "$CMD ls -l"
    ls --color=auto -l
    echo

    echo "$CMD ls $DIR"
    ls --color=auto  $DIR
    echo

    echo "$CMD ls  $DIR_TO_LINK"
    ls --color=auto  $DIR_TO_LINK
    echo

}


run_test(){
    # check basic symlinking
    test1

    # symlinking inside same directories
    test2

    # symlinking inside different directories
    test3

    # check symlinking to multiple sources
    test4

    # check for directories
    test5
}


START=$(date +%s.%N)
run_test
END=$(date +%s.%N)
DIFF=$(echo "$END - $START" | bc)

echo "Elapsed time : $DIFF seconds"