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perfmonctl.2: Minor rewording in RETURN VALUE
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -171,7 +171,9 @@ restart monitoring after receiving an overflow notification
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.SH "RETURN VALUE"
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.BR performctl ()
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returns zero when the operation is successful.
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On error, \-1 is returned and an error code is set in \fBerrno\fR.
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On error, \-1 is returned and
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.I errno
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is set to indicate the cause of the error.
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.SH VERSIONS
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.BR perfmonctl ()
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