arc.py: follow changes in mount-passthrough processes tree
The fuse processes are now children of the minijail pid that upstart is
tracking.
CQ-DEPEND=CL:1568161
BUG=b:128888349
TEST=test_that cheets_ContainerMount
Previous-Reviewed-on: https://chromium-review.googlesource.com/1541738
(cherry picked from commit a2e3ee06c9f3d2de533b1e5d5fed8fae034d1940)
Change-Id: I504eaa660fd9658d644f27cd3ffd30dc7b9ba114
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/1568001
Commit-Queue: Ereth McKnight-MacNeil <ereth@chromium.org>
Tested-by: Ereth McKnight-MacNeil <ereth@chromium.org>
Reviewed-by: Chris Morin <cmtm@chromium.org>
diff --git a/client/common_lib/cros/arc.py b/client/common_lib/cros/arc.py
index dc9b3e3..7216861 100644
--- a/client/common_lib/cros/arc.py
+++ b/client/common_lib/cros/arc.py
@@ -333,10 +333,9 @@
def _get_mount_passthrough_pid_internal(job_name):
"""Returns the PID of the mount-passthrough daemon job."""
job_pid = get_job_pid(job_name)
- # |job_pid| is the minijail process, obtain the PID of the process running
- # inside the mount namespace.
- # FUSE process is the only process running as chronos in the session.
- return utils.system_output('pgrep -u chronos -s %s' % job_pid)
+ # |job_pid| is the minijail process, the fuse process should be
+ # the only direct child of the minijail process
+ return utils.system_output('pgrep -P %s' % job_pid)
def get_mount_passthrough_pid_list():
