Manpages - CURLOPT_SEEKDATA.3

CURLOPT_SEEKDATA - pointer passed to the seek callback

#include <curl/curl.h>

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

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

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

HTTP, FTP, SFTP

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

  {
    struct data seek_data;
    curl_easy_setopt(CURL *handle, CURLOPT_SEEKFUNCTION, seek_cb);
    curl_easy_setopt(CURL *handle, CURLOPT_SEEKDATA, &seek_data);
  }

Added in 7.18.0

*CURLOPT_STDERR*(3), *CURLOPT_DEBUGFUNCTION*(3),