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[utils] Fix file locking for AOSP (#2714)

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Closes #2080, #2670

Authored by: jakeogh
This commit is contained in:
Justin Keogh 2022-03-03 13:09:00 +00:00 committed by GitHub
parent f1d130902b
commit acea8d7cfb
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1 changed files with 16 additions and 6 deletions
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12
yt_dlp/utils.py
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@ -2141,18 +2141,28 @@ def _unlock_file(f):
raise OSError('Unlocking file failed: %r' % ctypes.FormatError())
else:
# Some platforms, such as Jython, is missing fcntl
try:
import fcntl
def _lock_file(f, exclusive, block):
try:
fcntl.flock(f,
fcntl.LOCK_SH if not exclusive
else fcntl.LOCK_EX if block
else fcntl.LOCK_EX | fcntl.LOCK_NB)
except BlockingIOError:
raise
except OSError: # AOSP does not have flock()
fcntl.lockf(f,
fcntl.LOCK_SH if not exclusive
else fcntl.LOCK_EX if block
else fcntl.LOCK_EX | fcntl.LOCK_NB)
def _unlock_file(f):
try:
fcntl.flock(f, fcntl.LOCK_UN)
except OSError:
fcntl.lockf(f, fcntl.LOCK_UN)
except ImportError:
UNSUPPORTED_MSG = 'file locking is not supported on this platform'