System Software and Labs Code

if [ $2 = "exist" ]; then
st" ]; then
        if [ -e $1 ]; then
                echo "Yes"
        else
                echo "No"
        fi
fi
if [ $2 = "directory" ]; then
        if [ -d $1 ]; then
                echo "Yes"
        else
                echo "No"
        fi
fi

if [ $2 = "regular" ]; then
        if [ -f $1 ]; then
                echo "Yes"
        else
                echo "No"
        fi
fi

if [ $2 = "readable" ]; then
        if [ -r $1 ]; then
                echo "Yes"
        else
                echo "No"
        fi
fi

if [ $2 = "writable" ]; then
        if [ -w $1 ]; then
                echo "Yes"
        else
                echo "No"
        fi
fi

if [ $2 = "executable" ]; then
        if [ -x $1 ]; then
                echo "Yes"
        else
                echo "No"
        fi
fi

Check file type

regular_files=0
directory_files=0
for i in `ls $1`
do
        if [ -f $1/$i ]; then
                let regular_files=$regular_files+1
        elif [ -d $1/$i ]; then
                let directory_files=$directory_files+1
        fi
done
echo "regular files: $regular_files"
echo "directory files: $directory_files"

Search the directory

s=0
cnt=0
for i in `cat $1`
do
        let s=$s+1
        echo $i
        read -e j
                if [ $i = $j ]; then
                        echo "(O)"
                        let cnt=$cnt+1
                else
                        echo "(X)"
                fi
done
echo "$cnt / $s"

Dictation

L=0; C=0
for i in `cat $1`
do
        let L=$L+1
        let D=$L%2
        if [ $D = 1 ]
        then    echo $i
                read -e j
        else    if [ $i = $j ]
                then    echo "(O)"
                        let C=$C+1
                else    echo "(X)"
                        echo $i
                fi
        fi
done
let L=$L/2
echo "$C / $L"

QnA