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stdin-killer: do not setpgrp if already leader #1881

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Aug 4, 2023
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stdin-killer: do not setpgrp if already leader #1881

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4 changes: 3 additions & 1 deletion teuthology/task/install/bin/stdin-killer
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Original file line number Diff line number Diff line change
Expand Up @@ -210,8 +210,10 @@ if __name__ == "__main__":
}

if NS.setpgrp == "self":
os.setpgrp()
pgrp = os.getpgrp()
if pgrp != os.getpid():
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This looks correct as EPERM errno is returned if the process calling setpgrp is the session/process group leader. Question is, what caused this failure now.

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I'm not sure but clearly under normal circumstances stdin-killer is not already the process group leader. Perhaps when it was wrapped with the ulimit wrapper.

os.setpgrp()
pgrp = os.getpgrp()
elif NS.setpgrp == "child":
popen_kwargs["preexec_fn"] = os.setpgrp
pgrp = None
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