#!/usr/local/bin/dash
# goto_demo.sh

# goto ': some_label:'
goto()
{
    line_number=1
    start_line=1
    while IFS='' read -r line
    do
        if [ "${line}" = "${1}" ]
        then
            : > /tmp/goto.tmp
            start_line=${line_number}
        fi
        if [ ${line_number} -ge ${start_line} ]
        then
            echo "${line}" >> /tmp/goto.tmp
        fi
        line_number=$(( line_number + 1 ))
    done
    . /tmp/goto.tmp
} < ${0}

goto ': second:'
echo 'This will not be printed!'
: first:
echo '**************************************'
echo 'You are at first label!'
# cat /tmp/goto.tmp
echo '**************************************'
goto ': third:'
echo 'This will not be printed either!'
: second:
echo '**************************************'
echo 'You are at the second label!'
# cat /tmp/goto.tmp
echo '**************************************'
goto ': first:'
echo 'And finally, this will not be printed either!'
: third:
echo '**************************************'
echo 'You are at the third label!'
echo '######## cat /tmp/goto.tmp... ########'
cat /tmp/goto.tmp
echo '###### END cat /tmp/goto.tmp... ######'
echo '**************************************'
: end:
echo 'Exiting...'
echo '**************************************'
exit

Last login: Wed Sep 18 15:55:17 on ttys000
AMIGA:amiga~> cd Desktop/Code/Shell
AMIGA:amiga~/Desktop/Code/Shell> ./goto_demo.sh
**************************************
You are at the second label!
**************************************
**************************************
You are at first label!
**************************************
**************************************
You are at the third label!
######## cat /tmp/goto.tmp... ########
: third:
echo '**************************************'
echo 'You are at the third label!'
echo '######## cat /tmp/goto.tmp... ########'
cat /tmp/goto.tmp
echo '###### END cat /tmp/goto.tmp... ######'
echo '**************************************'
: end:
echo 'Exiting...'
echo '**************************************'
exit
###### END cat /tmp/goto.tmp... ######
**************************************
Exiting...
**************************************
AMIGA:amiga~/Desktop/Code/Shell> _