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wait.2: ERRORS: document EAGAIN for waitid() on a PID file descriptor
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -419,6 +419,11 @@ On failure, each of these calls sets
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to indicate the error.
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.SH ERRORS
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.TP
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.B EAGAIN
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The PID file descriptor specified in
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.I id
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is nonblocking and the process that it refers to has not terminated.
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.TP
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.B ECHILD
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(for
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.BR wait ())
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