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[tor-bugs] #13807 [arm]: Arm fails to list connections on OpenBSD due to lsof permissions error
#13807: Arm fails to list connections on OpenBSD due to lsof permissions error
-------------------------------------------------+-------------------------
Reporter: mmcc | Owner: atagar
Type: defect | Status: new
Priority: normal | Milestone:
Component: arm | Version:
Keywords: OpenBSD, lsof, fstat, files, | Actual Points:
permissions | Points:
Parent ID: |
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When running arm 1.4.5.0 and Tor 2.5.10 on OpenBSD 5.5, connection listing
with `lsof` fails. The console error is `lsof:
kvm_openfiles(execfile=/bsd, corefile=/dev/mem): Permission denied`. arm
is being run by the daemon user that owns the Tor process (`_tor`). It is
unsurprising that the permission is denied, as the unprivileged daemon
user is attempting to access the memory device. Additionally, `lsof` has
to be listed as a dependency and installed separately to begin with, which
is less-than-ideal.
It would probably be better to use `fstat` if it offers the needed
functionality. It is included in the default install, runs *far* faster,
and allows an unprivileged user to list their own open file descriptors
(e.g. `sudo -u _tor fstat -u _tor`).
I saw the mention of the arm rewrite on the mailing list and thought that
this would be a good time to mention this.
Thanks for reading!
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13807>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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