개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(1M)을 검색하려면 섹션에서 1M 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

CURLOPT_XFERINFOFUNCTION(3)

curl_easy_setopt options                           CURLOPT_XFERINFOFUNCTION(3)



NAME
       CURLOPT_XFERINFOFUNCTION - progress meter callback

SYNOPSIS
       #include <curl/curl.h>

       int progress_callback(void *clientp,
                             curl_off_t dltotal,
                             curl_off_t dlnow,
                             curl_off_t ultotal,
                             curl_off_t ulnow);

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_XFERINFOFUNCTION,
                                 progress_callback);

DESCRIPTION
       Pass a pointer to your callback function, which should match the proto‐
       type shown above.

       This function gets called by libcurl instead of its internal equivalent
       with  a  frequent  interval. While data is being transferred it will be
       called frequently, and during slow periods like when nothing  is  being
       transferred it can slow down to about one call per second.

       clientp is the pointer set with CURLOPT_XFERINFODATA(3), it is not used
       by libcurl but is only passed along from the application to  the  call‐
       back.

       The  callback  gets  told  how  much data libcurl will transfer and has
       transferred, in number of bytes. dltotal is the total number  of  bytes
       libcurl  expects  to  download in this transfer. dlnow is the number of
       bytes downloaded so far. ultotal is the total number of  bytes  libcurl
       expects  to  upload  in  this  transfer.  ulnow  is the number of bytes
       uploaded so far.

       Unknown/unused argument values passed to the callback will  be  set  to
       zero  (like  if you only download data, the upload size will remain 0).
       Many times the callback will be called one or more times first,  before
       it knows the data sizes so a program must be made to handle that.

       If  your  callback  function returns CURL_PROGRESSFUNC_CONTINUE it will
       cause libcurl to continue executing the default progress function.

       Returning any other  non-zero  value  from  this  callback  will  cause
       libcurl to abort the transfer and return CURLE_ABORTED_BY_CALLBACK.

       If  you  transfer data with the multi interface, this function will not
       be called during periods of idleness unless you  call  the  appropriate
       libcurl function that performs transfers.

       CURLOPT_NOPROGRESS(3)  must  be set to 0 to make this function actually
       get called.

DEFAULT
       By default, libcurl has an internal  progress  meter.  That  is  rarely
       wanted by users.

PROTOCOLS
       All

EXAMPLE
        struct progress {
          char *private;
          size_t size;
        };

        static size_t progress_callback(void *clientp,
                                        curl_off_t dltotal,
                                        curl_off_t dlnow,
                                        curl_off_t ultotal,
                                        curl_off_t ulnow)
        {
          struct progress *memory = (struct progress *)clientp;

          /* use the values */

          return 0; /* all is good */
        }

        struct progress data;

        /* pass struct to callback  */
        curl_easy_setopt(curl_handle, CURLOPT_XFERINFODATA, &data);

        curl_easy_setopt(curl_handle, CURLOPT_XFERINFOFUNCTION, progress_callback);

AVAILABILITY
       Added in 7.32.0. This callback replaces CURLOPT_PROGRESSFUNCTION(3)

RETURN VALUE
       Returns CURLE_OK.

SEE ALSO
       CURLOPT_XFERINFODATA(3), CURLOPT_NOPROGRESS(3),



libcurl 7.86.0                   May 17, 2022
                                                   CURLOPT_XFERINFOFUNCTION(3)