commit 500fd38a7d09e883257d84dd67bc7014f4f47085 Author: Damian Johnson atagar@torproject.org Date: Sun Dec 7 11:48:30 2014 -0800

Check for /proc read permissions when determining if it's available

On Gentoo proc permissions are locked down, causing our tests to fail...

====================================================================== ERROR: test_get_connections ---------------------------------------------------------------------- Traceback (most recent call last): File "/var/tmp/portage/net-libs/stem-1.2.2_p20141208/work/stem-1.2.2_p20141208/test/integ/util/connection.py", line 27, in test_get_connections connections = get_connections(resolver, process_pid = tor_pid) File "/var/tmp/portage/net-libs/stem-1.2.2_p20141208/work/stem-1.2.2_p20141208/stem/util/connection.py", line 177, in get_connections return [Connection(*conn) for conn in stem.util.proc.connections(process_pid)] File "/var/tmp/portage/net-libs/stem-1.2.2_p20141208/work/stem-1.2.2_p20141208/stem/util/proc.py", line 404, in connections raise exc IOError: unable to read '/proc/net/tcp': [Errno 13] Permission denied: '/proc/net/tcp'

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I'm tempted to change our 'is proc available?' check, but the platform only restricts /proc/net/*, so only doing this for connection resolution. --- stem/util/connection.py | 2 +- test/integ/util/proc.py | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/stem/util/connection.py b/stem/util/connection.py index f5ca3f4..c94b6fe 100644 --- a/stem/util/connection.py +++ b/stem/util/connection.py @@ -272,7 +272,7 @@ def system_resolvers(system = None):

# proc resolution, by far, outperforms the others so defaults to this is able

- if stem.util.proc.is_available(): + if stem.util.proc.is_available() and os.access('/proc/net/tcp', os.R_OK) and os.access('/proc/net/udp', os.R_OK): resolvers = [Resolver.PROC] + resolvers

return resolvers diff --git a/test/integ/util/proc.py b/test/integ/util/proc.py index cad0114..1047912 100644 --- a/test/integ/util/proc.py +++ b/test/integ/util/proc.py @@ -90,6 +90,9 @@ class TestProc(unittest.TestCase): elif not test.runner.get_runner().is_ptraceable(): test.runner.skip(self, '(DisableDebuggerAttachment is set)') return + elif not os.access('/proc/net/tcp', os.R_OK) or not os.access('/proc/net/udp', os.R_OK): + test.runner.skip(self, '(proc lacks read permissions)') + return

# making a controller connection so that we have something to query for with runner.get_tor_socket():