A smaller, cheaper, faster SED implementation
This is a smaller, cheaper, faster SED implementation. GNU used to use it, until they built their own sed around an extended regexp package. For embedded use we searched for a tiny sed implementation especially for use with the dietlibc and found Eric S. Raymond's sed implementation quite handy. Though it suffered several bugs and was not under active maintenance anymore. After sending a bunch of fixes we agreed to continue maintaining this lovely, historic sed implementation.