Tribblix: manual page: CURLOPT

CURLOPT_SEEKDATA(3) Introduction to Library Functions 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