https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=269213
Bug ID: 269213
Summary: /etc/rc.d/cleanvar interaction with samba fdescfs
mount causes file deletions outside of /var/run
Product: Base System
Version: Unspecified
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: misc
Assignee: b...@freebsd.org
Reporter: jul...@precisium.com.au
With newer samba versions there is apparently a requirement of the new VFS to
mount fdescfs with the nodup option.
Samba mounts fdescfs under /var/run e.g /var/run/samba4/fd
This interacts badly with /etc/rc.d/cleanvar which uses 'find /var/run ...'
to delete files under /var/run.
During startup - there appear to be various parts of the filesystem referenced
under /var/run/samba4/fd so that the result is deletion of all files under
paths such as /bin /sbin /etc /root
Rather than pushing to try to stop samba mounting this where it wants - I'm
filing this bug to see if it makes sense instead to make cleanvar safer, as
potentially other packages may do this sort of thing in future anyway.
I tried various -name & -path flags to exclude *samba4/fd/* etc -but 'find'
doesn't seem to recognise these as normal names & paths.
adding "-mount" to restrict find to the same device number as /var/run seems to
work.
e.g the relevant line in /etc/rc.d/cleanvar becomes:
find /var/run -mount \( -type f -or -type s | -name log -and ! -name logpriv \)
-delete
see also discussion at
https://forums.freebsd.org/threads/iocage-removes-files-at-startup.87733/
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