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CURLSHOPT_(UN)SHARE.md: do not modify shares while in use

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Reported-by: smaeljaish on hackerone

Closes #22217
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Daniel Stenberg 2026-06-29 17:41:34 +02:00
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3
docs/libcurl/opts/CURLSHOPT_SHARE.md
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@ -35,6 +35,9 @@ CURLSHOPT_SHARE(3) multiple times with different data arguments to have
the share object share multiple types of data. Unset a type again by setting
CURLSHOPT_UNSHARE(3).
Do not add types to a shared object that is being in use. Add them only
between transfers.
If any of the data is to be shared in multiple threads then mutex callbacks
must be set as well. See CURLSHOPT_LOCKFUNC(3) and CURLSHOPT_UNLOCKFUNC(3).

3
docs/libcurl/opts/CURLSHOPT_UNSHARE.md
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@ -36,6 +36,9 @@ below. You can set CURLSHOPT_UNSHARE(3) multiple times with different
data arguments to remove multiple types from the shared object. Add data to
share again with CURLSHOPT_SHARE(3).
Do not remove types from a shared object that is being in use. Unshare them
only between transfers.
## CURL_LOCK_DATA_COOKIE
Cookie data is no longer shared across the easy handles using this shared