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runqemu: acquire_lock() should fail when failed to open the file

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The open(self.lock, 'w') may fail when the lock is created by other
users, return false for this case to let it try other devices.

Fixed:
runqemu - INFO - Running /sbin/ip link...
runqemu - INFO - Acquiring lockfile /tmp/qemu-tap-locks/tap0.lock...
Traceback (most recent call last):
  File "/buildarea/lyang1/poky/scripts/runqemu", line 972, in <module>
    ret = main()
  File "/buildarea/lyang1/poky/scripts/runqemu", line 963, in main
    config.setup_network()
  File "/buildarea/lyang1/poky/scripts/runqemu", line 810, in setup_network
    self.setup_tap()
  File "/buildarea/lyang1/poky/scripts/runqemu", line 761, in setup_tap
    if self.acquire_lock():
  File "/buildarea/lyang1/poky/scripts/runqemu", line 182, in acquire_lock
    lock_descriptor = open(self.lock, 'w')
PermissionError: [Errno 13] Permission denied: '/tmp/qemu-tap-locks/tap0.lock'

(From OE-Core rev: f364f773a0381a75b5992c8c8a1d63a81dbd4422)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Robert Yang authored and Richard Purdie committed 2016-09-20 15:11:07 +01:00
1 parent 286db044c3
commit 6a5bd99bfc
1 file changed
+4 -4
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scripts/runqemu
+4 -4
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@@ -168,14 +168,14 @@ class BaseConfig(object):
def acquire_lock(self):
logger.info("Acquiring lockfile %s..." % self.lock)
lock_descriptor = open(self.lock, 'w')
try:
fcntl.flock(lock_descriptor, fcntl.LOCK_EX|fcntl.LOCK_NB)
self.lock_descriptor = open(self.lock, 'w')
fcntl.flock(self.lock_descriptor, fcntl.LOCK_EX|fcntl.LOCK_NB)
except Exception as e:
logger.info("Acquiring lockfile %s failed: %s" % (self.lock, e))
lock_descriptor.close()
if self.lock_descriptor:
self.lock_descriptor.close()
return False
self.lock_descriptor = lock_descriptor
return True
def release_lock(self):