Re[4]: sanitize_read: map errno=EPIPE to errno=0

From: Laurent Bercot <ska-skaware_at_skarnet.org>
Date: Wed, 01 Jul 2026 02:19:59 +0000

>/dev/kmsg can return EPIPE when messages was dropped after the fd was
>opened.

  That is an unfortunate choice, forcing syslogd to trap SIGPIPE for
*reading*.
  My conclusion is not "sanitize_read should be changed", it is
"sanitize_read should not be used when reading from /dev/kmsg". 😛

  And even then, can reading on /dev/kmsg even return EOF? If it cannot,
there is no possible confusion either.

  Device files are such a bunch of ad-hoc cases, it's annoying.

--
  Laurent

Received on Wed Jul 01 2026 - 04:19:59 CEST