NAME

       CURLOPT_SEEKDATA - pointer passed to the seek callback

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SEEKDATA, void *pointer);

DESCRIPTION

       Data pointer to pass to the seek callback function. If you use the CURLOPT_SEEKFUNCTION(3)
       option, this is the pointer you get as input.

DEFAULT

       If you do not set this, NULL is passed to the callback.

PROTOCOLS

       HTTP, FTP, SFTP

EXAMPLE

       #include <unistd.h> /* for lseek() */

       struct data {
         int our_fd;
       };

       static int seek_cb(void *clientp, curl_off_t offset, int origin)
       {
         struct data *d = (struct data *)clientp;
         lseek(d->our_fd, offset, origin);
         return CURL_SEEKFUNC_OK;
       }

       int main(void)
       {
         struct data seek_data;
         CURL *curl = curl_easy_init();
         if(curl) {
           curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, seek_cb);
           curl_easy_setopt(curl, CURLOPT_SEEKDATA, &seek_data);
         }
       }

AVAILABILITY

       Added in 7.18.0

RETURN VALUE

SEE ALSO

       CURLOPT_DEBUGFUNCTION(3),        CURLOPT_IOCTLFUNCTION(3),        CURLOPT_SEEKFUNCTION(3),
       CURLOPT_STDERR(3)