Shell Programming and Scripting

 
function fn1
{
echo "Hello World"
}

 
fn1 ()
{
echo "Hello World"
}

fn2 ()
{
echo "Hello World"
fn2
}
fn2

fn2 ()
{
        echo "Hello World"
        var=0
        while [ $var -le 3 ]
        do
                trap "echo 'Hello'" INT
                var=$(( $var + 1 ))
                echo $var
                sleep 5
        done
}

#!/bin/ksh
function f1
{
  f1v1=f1v1
  typeset f1v2=f1v2
  echo inside f1
  echo "f1v1: $f1v1"
  echo "f1v2: $f1v2"
  echo "\$0: $0"
}

f2()
{
  f2v1=f2v1
  typeset f2v2=f2v2
  echo inside f2
  echo "f2v1: $f2v1"
  echo "f2v2: $f2v2"
  echo "\$0: $0"
}

f1
echo outside f1
echo "f1v1: $f1v1"
echo "f1v2: $f1v2"
f2
echo outside f2
echo "f2v1: $f2v1"
echo "f2v2: $f2v2"

inside f1
f1v1: f1v1
f1v2: f1v2
$0: f1
outside f1
f1v1: f1v1
f1v2:
inside f2
f2v1: f2v1
f2v2: f2v2
$0: ./test
outside f2
f2v1: f2v1
f2v2: f2v2

#!/bin/ksh
function fn3
{
  trap 'echo "You triggered the trap that was set inside function fn3"' INT
  echo "sleeping 30 seconds inside fn3"
  sleep 30
}

fn4()
{
  trap 'echo "You triggered the trap that was set inside function fn4"' INT
  echo "sleeping 30 seconds inside fn4"
  sleep 30
}

trap 'echo "You triggered the trap that was set outside the function"' INT
fn3
echo "sleeping 30 seconds outside"
sleep 30
fn4
echo "sleeping 30 seconds outside"
sleep 30

sleeping 30 seconds inside fn3
^CYou triggered the trap that was set inside function fn3
You triggered the trap that was set outside the function
sleeping 30 seconds outside
^CYou triggered the trap that was set outside the function
sleeping 30 seconds inside fn4
^CYou triggered the trap that was set inside function fn4
You triggered the trap that was set inside function fn4
sleeping 30 seconds outside
^CYou triggered the trap that was set inside function fn4