개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

CURLOPT_XFERINFOFUNCTION(3)

CURLOPT_XF...FOFUNCTION(3) curl_easy_setopt options CURLOPT_XF...FOFUNCTION(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  up‐
       loaded 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_XF...FOFUNCTION(3)