On 10/11/15, Dan Stromberg <dstrombergli...@gmail.com> wrote: > Is there a way of outputting a datestamp to shell stderr at the _beginning_ > of the execution of a command, that won't wipe out $_? > > I use $_ quite a bit for the last argument to the previous command, > interactively. And I'd like to datestamp all my commands. Datestamping > after with $PS1 is easy, but datestamping before is a little harder. > > I've tried using: > > function preexec { if tty -s; then echo "$(tput smso)cmd started $(date > +%Y\ %a\ %b\ %d\ %r)$(tput rmso)"; fi; } > trap preexec DEBUG > > ...but as you might suspect, I'm finding that $_ is always "preexec" with > this enabled. > > Any suggestions? > > Thanks! > trap '__=$_; preexec; : "$__"' DEBUG
--- xoxo iza