Brett Randall <[email protected]> added the comment:
docker run -i --rm python:3.9 <<-EOF
import os
print(os.get_inheritable(0))
fd_null_before_close = os.open("/dev/null", os.O_RDWR)
os.close(0)
fd_null = os.open("/dev/null", os.O_RDWR)
print(fd_null_before_close)
print(fd_null)
os.dup2(fd_null, 0)
print(os.get_inheritable(0))
os.dup2(fd_null_before_close, 0)
print(os.get_inheritable(0))
EOF
True
3
0
False
True
----------
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Python tracker <[email protected]>
<https://bugs.python.org/issue46454>
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