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curl_easy_perform(3)            libcurl Manual            curl_easy_perform(3)

       curl_easy_perform - Perform a file transfer

       #include <curl/curl.h>

       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  operations  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 curl_easy_perform.

       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 transfers, 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_ERROR-
       BUFFER  was  set with curl_easy_setopt there will be a readable error message in the error buffer when non-zero
       is returned.

       curl_easy_init(3), curl_easy_setopt(3),

libcurl 7.7                       5 Mar 2001              curl_easy_perform(3)