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>I'm on SunOS 5.10

Change awk to nawk and try again.

> doesn't work for me either (Can't open -i)

-i is an option for in place editing. It's a feature of GNU sed, thus it's not available in...

The standard ways to perform this comparison are:
if [ "${VAR}" = 'Value' ]
then
echo true
else
echo false
fiand:
if test "${VAR}" = 'Value'
then
echo true
else
echo false
fi...

the issue was spaces around '='.
The quotation is just the BestPractice.

Your first shell script is defining a function and after that it knows about that function. But other shell scripts do not. Each shell script must define its own functions.