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_IOCTLFUNCTION(3)

CURLOPT_IOCTLFUNCTION(3)   curl_easy_setopt options   CURLOPT_IOCTLFUNCTION(3)

NAME
       CURLOPT_IOCTLFUNCTION - callback for I/O operations

SYNOPSIS
       #include <curl/curl.h>

       typedef enum {
         CURLIOE_OK,            /* I/O operation successful */
         CURLIOE_UNKNOWNCMD,    /* command was unknown to callback */
         CURLIOE_FAILRESTART,   /* failed to restart the read */
         CURLIOE_LAST           /* never use */
       } curlioerr;

       typedef enum  {
         CURLIOCMD_NOP,         /* no operation */
         CURLIOCMD_RESTARTREAD, /* restart the read stream from start */
         CURLIOCMD_LAST         /* never use */
       } curliocmd;

       curlioerr ioctl_callback(CURL *handle, int cmd, void *clientp);

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_IOCTLFUNCTION, ioctl_callback);

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

       This  callback  function  gets called by libcurl when something special
       I/O-related needs to be done that the library cannot do by itself.  For
       now,  rewinding the read data stream is the only action it can request.
       The rewinding of the read data stream may be necessary  when  doing  an
       HTTP PUT or POST with a multi-pass authentication method.

       The  callback  MUST  return  CURLIOE_UNKNOWNCMD if the input cmd is not
       CURLIOCMD_RESTARTREAD.

       The clientp argument to the callback is  set  with  the  CURLOPT_IOCTL‐
       DATA(3) option.

       This  option  is deprecated! Do not use it. Use CURLOPT_SEEKFUNCTION(3)
       instead to provide seeking! If CURLOPT_SEEKFUNCTION(3) is set, this pa‐
       rameter will be ignored when seeking.

DEFAULT
       By default, this parameter is set to NULL. Not used.

PROTOCOLS
       Used with HTTP

EXAMPLE
       static curlioerr ioctl_callback(CURL *handle, int cmd, void *clientp)
       {
         struct data *io = (struct data *)clientp;
         if(cmd == CURLIOCMD_RESTARTREAD) {
           lseek(fd, 0, SEEK_SET);
           current_offset = 0;
           return CURLIOE_OK;
         }
         return CURLIOE_UNKNOWNCMD;
       }
       {
         struct data ioctl_data;
         curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_callback);
         curl_easy_setopt(curl, CURLOPT_IOCTLDATA, &ioctl_data);
       }

AVAILABILITY
       Added in 7.12.3. Deprecated since 7.18.0.

RETURN VALUE
       Returns CURLE_OK if the option is supported,  and  CURLE_UNKNOWN_OPTION
       if not.

SEE ALSO
       CURLOPT_IOCTLDATA(3), CURLOPT_SEEKFUNCTION(3),

libcurl 7.86.0                 October 12, 2022       CURLOPT_IOCTLFUNCTION(3)