if condition1; then
    foo1
elif condition2; then
    foo2
else
    foox
fi

#! /bin/sh

set -e

sub phone_is_charging() {
    lshal -u /org/freedesktop/Hal/devices/bme | grep -iq "maemo.rechargeable.charging_status = 'on'"
}

sub set_profile_and_foo() {
    foo $1
}


# main logic starts here

if phone_is_charging; then
    set_profile_and_foo General
else
    set_profile_and_foo Silent
fi

#! /bin/bash

sub foo() {
    local x="$1"
    echo $x
}

x=xyzzy
foo bar
echo $x

foo="$(cat "$filename")"

test "$variable" = "yes"
test "x$variable" = "xyes"  # if you're paranoid