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Fix AIX bug for users with unlimited nofiles #41

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Jul 2, 2017
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Fix AIX bug for users with unlimited nofiles #41

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5 changes: 4 additions & 1 deletion ptyprocess/ptyprocess.py
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Original file line number Diff line number Diff line change
Expand Up @@ -251,7 +251,10 @@ def spawn(

# Do not allow child to inherit open file descriptors from parent,
# with the exception of the exec_err_pipe_write of the pipe
max_fd = resource.getrlimit(resource.RLIMIT_NOFILE)[0]
# Impose ceiling on max_fd: AIX bugfix for users with unlimited
# nofiles where resource.RLIMIT_NOFILE is 2^63-1 and os.closerange()
# occasionally raises out of range error
max_fd = min(1048576, resource.getrlimit(resource.RLIMIT_NOFILE)[0])
os.closerange(3, exec_err_pipe_write)
os.closerange(exec_err_pipe_write+1, max_fd)

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