4.4BSD snapshot (revision 8.1); add 1993 to copyright
Add include files to get prototype declarations, and fix bugs found.
make error messages a little better, use constants in unistd.h
new copyright notice
separate strerror() and make perror() call it.
on unknown error, at least print out the errno
add strerror function; ANSI 4.11.6.2
check for errno < 0
rewritten to use writev by Sam; add Berkeley specific header
sys_nerr and sys_errlist are externs
added LIBC_SCCS condition for sccs ids
Add copyright
use writev to avoid small net writes
date and time created 80/12/21 16:39:58 by wnj