Thorsten Glaser <tg...@mirbsd.org> wrote:
> Whether ?echo? is a builtin or not is an implementation detail.
> Heck, things like ?true?, ?false?, ? are (and others can be)
> implemented in some operating systems by symlinking them to the
> shell executable (either ksh93 *or* mksh? not even considering
> busybox).
echo was made a builtin in the early 1980s already for performance reasons.
true/false have been added by some shells to speed up "configure" ;-)
Jörg
--
EMail:jo...@schily.net (home) Jörg Schilling D-13353 Berlin
joerg.schill...@fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.org/private/ http://sf.net/projects/schilytools/files/'
