47 lines
1.2 KiB
Python
47 lines
1.2 KiB
Python
# A program which exits after starting a child which inherits its
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# stdin/stdout/stderr and keeps them open until stdin is closed.
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import os
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import sys
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def grandchild() -> None:
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sys.stdout.write("grandchild started")
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sys.stdout.flush()
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sys.stdin.read()
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def main() -> None:
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if sys.argv[1] == "child":
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if sys.argv[2] == "windows":
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import win32api as api
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import win32process as proc
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info = proc.STARTUPINFO()
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info.hStdInput = api.GetStdHandle(api.STD_INPUT_HANDLE)
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info.hStdOutput = api.GetStdHandle(api.STD_OUTPUT_HANDLE)
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info.hStdError = api.GetStdHandle(api.STD_ERROR_HANDLE)
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python = sys.executable
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scriptDir = os.path.dirname(__file__)
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scriptName = os.path.basename(__file__)
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proc.CreateProcess(
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None,
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" ".join((python, scriptName, "grandchild")),
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None,
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None,
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1,
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0,
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os.environ,
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scriptDir,
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info,
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)
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else:
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if os.fork() == 0:
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grandchild()
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else:
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grandchild()
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if __name__ == "__main__":
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main()
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