CURLOPT_RESUME_FROM_LARGE - offset to resume transfer from

Added in curl 7.11.0

0, not used

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.

int main(void) { CURL *curl = curl_easy_init(); if(curl) { curl_off_t resume_position = 1234; /* get it somehow */ curl_off_t file_size = 9876; /* 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); } }

CURLOPT_RESUME_FROM_LARGE - offset to resume transfer from

This functionality affects all supported protocols

curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

CURLOPT_INFILESIZE_LARGE(3), CURLOPT_RANGE(3), CURLOPT_RESUME_FROM(3) libcurl 2025-06-16 CURLOPT_RESUME_FROM_LARGE(3)

#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESUME_FROM_LARGE, curl_off_t from);