CURLOPT_RESUME_FROM(3)     Library Functions Manual     CURLOPT_RESUME_FROM(3)

NAME
       CURLOPT_RESUME_FROM - offset to resume transfer from

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESUME_FROM, long from);

DESCRIPTION
       Pass a long as parameter. It contains the offset in number of bytes
       that you want the transfer to start from. Set this option to 0 to make
       the transfer start from the beginning (effectively disabling resume).
       For FTP, set this option to -1 to make the transfer start from the end
       of the target file (useful to continue an interrupted upload).

       When doing uploads with FTP, the resume position is where in the
       local/source file libcurl should try to resume the upload from and it
       then appends the source file to the remote target file.

       If you need to resume a transfer beyond the 2GB limit, use
       CURLOPT_RESUME_FROM_LARGE(3) instead.

DEFAULT
       0, not used

PROTOCOLS
       All

EXAMPLE
       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           long size_of_file;

           curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com");

           /* resume upload at byte index 200 */
           curl_easy_setopt(curl, CURLOPT_RESUME_FROM, 200L);

           /* ask for upload */
           curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);

           /* set total data amount to expect */
           curl_easy_setopt(curl, CURLOPT_INFILESIZE, size_of_file);

           /* Perform the request */
           curl_easy_perform(curl);
         }
       }

AVAILABILITY
       Always

RETURN VALUE
       Returns CURLE_OK

SEE ALSO
       CURLOPT_INFILESIZE(3), CURLOPT_RANGE(3), CURLOPT_RESUME_FROM_LARGE(3)

libcurl                          April 26 2024          CURLOPT_RESUME_FROM(3)