[ocicat]

Originally Posted by guitarscn

That page says the guide is obsolete and is only preserved for historical purposes.

Updated. Thanks for pointing this out.

Would sed/awk work?

Yes, but the overall solution may or may not be implemented solely in terms of one utility or the other. This is where you might need to write one portion in sed(1), another in awk(1), & glue everything together with sh(1).