Creating the rcS script

The second main boot script is the rcS script. Create the /etc/init.d/rcS script by running the following command:

cat > /etc/init.d/rcS << "EOF"
#!/bin/sh
# Begin /etc/init.d/rcS

#
# See the rc script for the extensive comments on the constructions
# used here
#

source /etc/init.d/functions

print_error_msg()
{
 
        echo
        $FAILURE
        echo -n "You should not read this error message. It means "
        echo "that an unforeseen error "
        echo -n "took place and subscript $i exited with "
        echo "a return value "
        echo -n "of $error_value for an unknown reason. If you're able "
        echo "to trace this error down "
        echo -n "to a bug in one of the files provided by this book, "
        echo "please be so kind to "
        echo -n "inform us at [email protected]"
        $NORMAL
        echo
        echo
        echo "Press a key to continue..."
        read

}

runlevel=S
prevlevel=N
umask 022
export runlevel prevlevel

trap ":" INT QUIT TSTP

#
# Collect all the S scripts in /etc/rcS.d and execute them
#

for i in /etc/rcS.d/S*
do
        [ ! -f  "$i" ] && continue;
                $i start
                error_value=$?

                if [ $error_value != 0 ]
                then
                        print_error_msg
                fi
done

# End /etc/init.d/rcS
EOF