Man page - curlopt_seekdata(3)

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Manual

CURLOPT_SEEKDATA(3)

Library Functions Manual

CURLOPT_SEEKDATA(3)

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

This functionality affects ftp, http and 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 curl 7.18.0