“Note that there is one less blank line here; it has been replaced by the #! line. But otherwise it is identical. Sun has merely passed on the copyright notice.

“Note that there is one less blank line here; it has been replaced by the #! line. But otherwise it is identical. Sun has merely passed on the copyright notice. I wonder if Sun has written permission from AT&T to use blank lines in their code?” Fun fact: SVR4 was a joint AT&T/Sun project, so this was a SunOS file originally — I believe the “SMI” in the #ident line stands for “Sun Microsystems Inc.” and was a standard feature of all our SCCS identifiers.