Log rotation

[gaf at blu.org (Jerry Feldman)]

Note that the [ character is a Unix/Linux command NOT a shell builtin. If 
you look at /usr/bin on most systems:
lrwxrwxrwx    1 root     root            4 Jun  3 18:18 [ -> test
So, what that line really is:
while test read $line ]; do

Also note that read is a Unix command, but not a linux command.
>From Compaq Tru64 Version 4.0F: 
-rwxr-xr-x   1 bin      bin         1518 Apr 12  1999 /bin/read
And remember that the original question was in regard to Digital Unix (eg. 
Tru64).
Derek Martin wrote:

> > while [ read $line ]; do
> 
> This test is always true, because the string "read" contains
> characters.  However, you haven't asked it to read a line, so the
> variable $line is always null for the duration of your script (unless
> it inherited a value from the parent shell).  
-- 
Jerry Feldman <gaf at blu.org>
Boston Linux and Unix user group
http://www.blu.org


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