curl_easy_perform man page on Oracle

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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  con‐
       nection 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

       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 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)

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