Bug 811537

Summary:	dracut passes on PWD and SHLVL env vars to systemd
Product:	[Fedora] Fedora	Reporter:	Lennart Poettering <lpoetter>
Component:	dracut	Assignee:	dracut-maint
Status:	CLOSED WONTFIX	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	17	CC:	dracut-maint, jonathan
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Last Closed:	2012-04-11 11:19:57 UTC	Type:	Bug
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Description Lennart Poettering 2012-04-11 11:09:26 UTC

dracut-017-62.git20120322.fc17.noarch

Not sure whether bash or dracut is to blame here, but for some reason it seems that systemd when invoked gets PWD=/ and SHLVL=0 passed in the env block which is then inherited to all system services. And we probably shouldn't do that...

This can easily be checked with "cat /proc/1/environ"

Comment 1 Lennart Poettering 2012-04-11 11:19:57 UTC

Hmm, so it seems that bash always implicitly exports "PWD", "SHLVL" and "_". See comments in:

http://lists.busybox.net/pipermail/busybox-cvs/2009-September/029857.html

Given that people might actually invoke us with an exec from an init=/bin/sh boot it probably makes sense for systemd to unconditionally unset these env vars. Also, this behaviour seems to apply to both bash and the busybox shell, hence it's generic enough to be something to unset in systemd. 

I guess that means that there's nothing to fix in dracut. Closing again. Sorry for the noise.