Re: [dev] redirecting standard error to another terminal

From: Hiltjo Posthuma <>
Date: Sat, 18 Jun 2022 17:33:03 +0200

On Sat, Jun 18, 2022 at 09:03:27AM -0400, Greg Reagle wrote:
> OMG I wish I had known this YEARS ago. I can redirect the standard error of a program to a different terminal! I am using X11 and dwm and st on Debian. For example:
> ls --foobar 2> /dev/pts/0
> I am excited by the possibilities and mad at myself for not having thought of doing this before.
> When I am debugging a terminal program that use the whole screen (like a text editor running ncurses) it doesn't really work to have stderr information mixed in with the TUI. Problem solved! I can print debugging information to stderr. Or it would help with debugging something like dvtm.
> Now that I think about it, redirecting stderr to a log file and looking at the log file with tail -f in another terminal would also achieve similar goal, I guess.

You can also do:

        dprintf(9, "something\n");

And do:

        ./program 9>topsecret_debug_log


Kind regards,
Received on Sat Jun 18 2022 - 17:33:03 CEST

This archive was generated by hypermail 2.3.0 : Sat Jun 18 2022 - 17:36:08 CEST