Garrett D'Amore wrote:
>
> Sorry if this is a FAQ.
>
> I've switched to ksh93 as my default interactive shell. But one more
> behavior is bugging me.
>
> I often have numerous command windows up at a time. I do different
> kinds of things in them -- e.g. one window is on a host doing testing,
> while another is a directory doing compilation.
>
> For these things, I prefer to have my shell history *not* be shared with
> all windows... but each window (or each shell process) to have its own
> history.
>
> Is there a way I can get this behavior with ksh93, instead of the
> default "all windows share a common history file" behavior? (Note: as a
> consequence of this, I don't care if I don't have history saved to a
> file -- in fact I prefer it *not* to be.)
That's the difference between ksh's writing immediately to the history
file vs. bash's write-at-shell-exit mode.
Try adding this to /etc/ksh.kshrc:
-- snip --
function merge_hist
{
(
unset seperate_history
hist -l -n |
sed $'s/^\t//' |
(unset HISTFILE ; ksh93 -c 'IFS="" ; while read -s i ;
do printf "#
adding %s\n" "$i" ; done')
)
rm "${seperate_history.filename}"
}
if [[ -z "$HISTFILE" || ! -w "$HISTFILE" ]] ; then
typeset -C seperate_history=(
filename="/tmp/.ksh_hist_${LOGNAME}.${PPID}.$$" )
export HISTFILE="${seperate_history.filename}"
fi
trap "merge_hist seperate_history.filename" EXIT
-- snip --
This sets-up a seperate history file at interactive shell startup and
merges them back to ~/.sh_history when the shell exists.
----
Bye,
Roland
--
__ . . __
(o.\ \/ /.o) roland.mainz at nrubsig.org
\__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer
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(;O/ \/ \O;)
