CentOS 7.0 - man page for curl_easy_perform (centos section 3)
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curl_easy_perform(3) libcurl Manual curl_easy_perform(3)
curl_easy_perform - Perform a file transfer
CURLcode curl_easy_perform(CURL *handle);
This function is called after the init and all the curl_easy_setopt(3) calls are made, and
will perform the transfer as described in the options. It must be called with the same
handle as input as the curl_easy_init call returned.
You can do any amount of calls to curl_easy_perform(3) while using the same handle. If you
intend to transfer more than one file, you are even encouraged to do so. libcurl will then
attempt to re-use the same connection for the following transfers, thus making the opera-
tions faster, less CPU intense and using less network resources. Just note that you will
have to use curl_easy_setopt(3) between the invokes to set options for the following
You must never call this function simultaneously from two places using the same handle.
Let the function return first before invoking it another time. If you want parallel trans-
fers, you must use several curl handles.
0 means everything was ok, non-zero means an error occurred as <curl/curl.h> defines. If
the CURLOPT_ERRORBUFFER was set with curl_easy_setopt there will be a readable error mes-
sage in the error buffer when non-zero is returned.
libcurl 7.7 5 Mar 2001 curl_easy_perform(3)
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