O_ Thu, Jan 08, 2026 at 10:41:28AM -0500, Dennis Putnam via Postfix-users wrote:
> debugger_command =
> PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin;
> (strace -p $
> process_id 2>&1 | logger -p mail.info) & sleep 5
Examples from DEBUG_README.html:
/etc/postfix/main.cf:
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin;
(truss -p $process_id 2>&1 | logger -p mail.info) & sleep 5
/etc/postfix/main.cf:
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
ddd $daemon_directory/$process_name $process_id & sleep 5
and my faviourite:
/etc/postfix/main.cf:
debugger_command =
PATH=/bin:/usr/bin:/sbin:/usr/sbin; export PATH; HOME=/root;
export HOME; screen -e^tt -dmS $process_name gdb
$daemon_directory/$process_name $process_id & sleep 2
Notice that none of these have whitespace between "$" and "process_id".
The first one is closest to what you want. Just replace "truss -p" with
"strace -p".
That said, why do you feel you need to debug the smtpd process? That's
rarely needed unless you're experimenting with private patches that
aren't working...
--
Viktor. 🇺🇦 Слава Україні!
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