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-rw-r--r--docs/libcurl/curl_multi_fdset.39
1 files changed, 7 insertions, 2 deletions
diff --git a/docs/libcurl/curl_multi_fdset.3 b/docs/libcurl/curl_multi_fdset.3
index 7e54dfeac..9b06a3c08 100644
--- a/docs/libcurl/curl_multi_fdset.3
+++ b/docs/libcurl/curl_multi_fdset.3
@@ -21,6 +21,11 @@ but be sure to FD_ZERO them before calling this function as
otherwise remove any others. The \fIcurl_multi_perform(3)\fP function should be
called as soon as one of them is ready to be read from or written to.
+To be sure to have up-to-date results, you should call
+\fIcurl_multi_perform\fP until it does not return CURLM_CALL_MULTI_PERFORM
+prior to calling \fIcurl_multi_fdset\fP. This will make sure that libcurl has
+updated the handles' socket states.
+
If no file descriptors are set by libcurl, \fImax_fd\fP will contain -1 when
this function returns. Otherwise it will contain the higher descriptor number
libcurl set.
@@ -37,5 +42,5 @@ figure out how long to wait for action.
CURLMcode type, general libcurl multi interface error code. See
\fIlibcurl-errors(3)\fP
.SH "SEE ALSO"
-.BR curl_multi_cleanup "(3)," curl_multi_init "(3), "
-.BR curl_multi_timeout "(3) "
+.BR curl_multi_cleanup "(3), " curl_multi_init "(3), "
+.BR curl_multi_timeout "(3), " curl_multi_perform "(3) "