Marcelo E. Magallón <[EMAIL PROTECTED]> writes:
> [79 jacinta:~] while true ; do echo -n . ; /usr/sbin/update-alternatives
> --display WindowMaker | grep -q 'WindowMaker-newstyle' ; done
> .....Broken pipe
>From the grep man page:
-q, --quiet
Quiet; suppress normal output. The scanning will
stop on the first match.
If grep exits (because it found a match) before update-alternatives is
finished writing to the pipe, then update-alternatives will receive a
SIGPIPE signal, and the shell will print "Broken pipe" after
update-alternatives crashes.
You can see this easily with something like `cat /dev/zero | true'.
(true doesn't read any input before it exits.)
> do you see a problem with the statement?
This is how it's supposed to work. Can someone else suggest a way to
suppress the messages?
--
Carey Evans http://home.clear.net.nz/pages/c.evans/
GNU GPL: "The Source will be with you... always."
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