Public bug reported:
It would be beneficial to change 52 line in /etc/init.d/postfix from:
dir=$(ls -l /proc/$pid/exe 2>/dev/null | sed 's/.* -> //;
s/\/[^\/]*$//')
to:
dir=$(cat /proc/$pid/task/$pid/cmdline 2>/dev/null)
First, it's obviously shorter. Second, it would work in Docker. It does
require additional kernel capabilities for looking into /proc/$pid/exe.
By default, Docker (and I presume that the same situation is with LXC
containers as well) does not give permission to /proc/$pid/exe, but does
provide access to contents of cmdline.
** Affects: postfix (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1444968
Title:
Postfix init.d scripts malfunction in an unprivilleged Docker
container
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