> No, ${parameter:offset} and ${parameter:offset:length} are bash specific
> not XSI mandated.
But we don't need bash-specific hacks.
${parameter#??} serves as a great XSI alternative to ${parameter:2},
and with a (lot) more thought, ${1:1:1} can be written without forks
and without bash-isms as:
tmp=${1#?}
patt=
i=2
while test $i -lt ${#1}; do
patt="?$patt"
i=$((i+1))
done
result=${tmp%$patt}
Obviously, you'd want to pick better variable names due to namespace
considerations...
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