source: vendor/bash/3.1-p17/tests/func.tests

a()
{
        x=$((x - 1))
        return 5
}

b()
{
        x=$((x - 1))
        a
        echo a returns $?
        return 4
}

c()
{
        x=$((x - 1))
        b
        echo b returns $?
        return 3
}

d()
{
        x=$((x - 1))
        c
        echo c returns $?
        return 2
}

e()
{
        d
        echo d returns $?
        echo in e
        x=$((x - 1))
        return $x
}

f()
{
        e
        echo e returned $?
        echo x is $x
        return 0
}

x=30
f

# make sure unsetting a local variable preserves the `local' attribute
f1()
{
        local zz
        zz=abcde
        echo $zz
        unset zz
        zz=defghi
        echo $zz
}

zz=ZZ
echo $zz
f1
echo $zz

unset -f f1
f1()
{
        return 5
}

( f1 )
echo $?

unset -f f1
f1()
{
        sleep 5
        return 5
}

f1 &
wait
echo $?

unset -f f1

f1()
{
        echo $AVAR
        printenv AVAR
}

AVAR=AVAR
echo $AVAR
f1
AVAR=foo f1
echo $AVAR

unset -f f1
# make sure subshells can do a `return' if we're executing in a function
f1()
{
        ( return 5 )
        status=$?
        echo $status
        return $status
}

f1
echo $?

declare -F f1   # should print just the name
declare -f f1   # should print the definition, too

# no functions should be exported, right?
declare -xF
declare -xf

# FUNCNAME tests
func2()
{
        echo FUNCNAME = $FUNCNAME
}

func()
{
        echo before: FUNCNAME = $FUNCNAME
        func2
        echo after: FUNCNAME = $FUNCNAME
}

echo before: try to assign to FUNCNAME
FUCNAME=7

echo outside: FUNCNAME = $FUNCNAME
func
echo outside2: FUNCNAME = $FUNCNAME

# test exported functions (and cached exportstr)
zf()
{
        echo this is zf
}
export -f zf

${THIS_SH} -c 'type -t zf'
${THIS_SH} -c 'type zf'

${THIS_SH} ./func1.sub

# tests for functions whose bodies are not group commands, with and without
# attached redirections
${THIS_SH} ./func2.sub

# test for some posix-specific function behavior
${THIS_SH} ./func3.sub

unset -f myfunction
myfunction() {
    echo "bad shell function redirection"
} >> /dev/null

myfunction
myfunction | cat

exit 0