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docs: narrow CURLOPT_CLOSESOCKETFUNCTION to defined guarantees

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jayvenn21 2026-02-09 10:33:25 -05:00
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docs/libcurl/opts/CURLOPT_CLOSESOCKETFUNCTION.md
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@ -50,14 +50,11 @@ than the transfer itself in the multi/share handle's connection cache.
# NOTES ON IDLE CONNECTIONS
The close socket callback is invoked when libcurl closes a socket it owns.
The callback and CURLOPT_CLOSESOCKETDATA(3) are copied from the *first* easy
handle that creates the connection; changing this option on a subsequent
easy handle that reuses the same connection has no effect for that
connection. The callback is not guaranteed to be called for every socket
that leaves use, for example when connections are kept alive in the
connection cache and reused. Applications must not assume the callback is
called for every socket lifecycle.
When using the multi interface, the close socket callback is invoked when
libcurl closes a socket it owns. The callback and CURLOPT_CLOSESOCKETDATA(3)
are copied from the *first* easy handle that creates the connection;
changing this option on a subsequent easy handle that reuses the same
connection has no effect for that connection.
# DEFAULT