Under the `-n` option, the man page currently says
To show settings that differ from built-in defaults only,
use the following bash syntax:
comm -23 <(postconf -n) <(postconf -d)
Replace "-23" with "-12" to show settings that duplicate built-in
defaults.
Curiously, with the typical LANG=en_US.UTF-8, this complains that the
inputs are not sorted. It fails at the transition from smtp to smtpd
lines:
smtp_[whatever]
smtpd_[whatever]
because, apparently, the highly complex Unicode collation rules modify
how the underscore character (0x5f) is treated. I couldn't find a
reference explaining exactly why, but it seems to be related to
"variable collation elements". Adding LC_ALL=C to the front of the
comm command cures the problem.
So I'd like to suggest that the manpage either add the LC_ALL=C prefix
or include a warning about the possible issue under Unicode locales.
--
Jim Garrison
[email protected]
