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From: Paul Lew <paullew@cisco.com>
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Message-ID: <15752.65212.28904.60591@paullew-ultra.cisco.com>
Date: Wed, 18 Sep 2002 15:31:24 -0700
To: zsh-users@sunsite.auc.dk
Subject: Reduce forking overhead in precmd()
X-Mailer: VM 7.07 under Emacs 21.2.1

I have a precmd() that I would like to augment to include source
control freeze info (we use clearcase, a freeze will change the way
files are represented).

precmd ()
{
    ....

    if [[ $CLEARCASE_ROOT != "" ]]; then
        RPROMPT=${RPROMPT:s/"%S f %s "//}
        cleartool catcs | grep time > /dev/null
	if [[ $? == 0 ]]; then
	    RPROMPT="%S f %s %$RPROMPT"
	fi
    fi
}

Basically the "cleartool catcs" command is required, if its output
contain 'time', then there is a freeze condition which I will modify
the RPROMPT to include an indicator.

However, this still added 2 more forks per command and the response is
not that desirable.  Any way to speed this up, for example, is there
a way in zsh to replace the 'grep' above?

Thanks in advance.