CURLOPT_RESUME_FROM_LARGE(3)                          Library Functions Manual

NAME
       CURLOPT_RESUME_FROM_LARGE - offset to resume transfer from

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESUME_FROM_LARGE,
                                 curl_off_t from);

DESCRIPTION
       Pass a curl_off_t 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
       appends the source file to the remote target file.

DEFAULT
       0, not used

PROTOCOLS
       All

EXAMPLE
       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           curl_off_t resume_position; /* get it somehow */
           curl_off_t file_size; /* get it somehow as well */

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

           /* resuming upload at this position, possibly beyond 2GB */
           curl_easy_setopt(curl, CURLOPT_RESUME_FROM_LARGE, resume_position);

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

           /* set total data amount to expect */
           curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, file_size);

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

AVAILABILITY
       Added in 7.11.0

RETURN VALUE
       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
       if not.

SEE ALSO
       CURLOPT_INFILESIZE_LARGE(3), CURLOPT_RANGE(3), CURLOPT_RESUME_FROM(3)

libcurl                          April 26 2024    CURLOPT_RESUME_FROM_LARGE(3)