I'm running Korn 93u+ and I want to echo the current time each time I enter a command. I currently just put the time in my PS1, but that's obviously flawed because if I leave the command line for some period of time I end up with a stale timestamp. I'd rather have an operation that executes after I hit enter, e.g.
$ ls -a1
Running at 2025-01-08 14:25:30.
.
..
dummy_dir_1
dummy_dir_2
$
Is there a way to do that config-wise?
A very simply way is to trap ... DEBUG
e.g.
$ trap 'echo Running at $(date)' DEBUG
$ ls /var/tmp
Running at Wed Jan 8 19:07:05 EST 2025
systemd-private-f7c619ae552e4d6b96bd3089d35d77b8-cups.service-DX0Iti/
systemd-private-f7c619ae552e4d6b96bd3089d35d77b8-dovecot.service-IGzccG/
systemd-private-f7c619ae552e4d6b96bd3089d35d77b8-httpd.service-5CaI8v/
systemd-private-f7c619ae552e4d6b96bd3089d35d77b8-ntpd.service-F8tpA0/
$ echo hello
Running at Wed Jan 8 19:07:11 EST 2025
hello
$ pwd
Running at Wed Jan 8 19:07:12 EST 2025
/home/sweh
