---
name: "CURLOPT_RESUME_FROM_LARGE"
section: "3"
platform: "linux"
package: "curl"
version: "8.23.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLOPT_RESUME_FROM_LARGE"
---

# CURLOPT\_RESUME\_FROM\_LARGE(3)

offset to resume transfer from

## 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.

HTTP uploads using POST or PUT cannot be resumed. *[curl\_easy\_perform(3)](/curl_easy_perform/3.md)* returns CURLE\_BAD\_FUNCTION\_ARGUMENT when this option is set to a non-zero value for such an upload.

## DEFAULT

0, not used

## PROTOCOLS

This functionality affects all supported protocols

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode result;
    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 */
    result = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## AVAILABILITY

Added in curl 7.11.0

## RETURN VALUE

*[curl\_easy\_setopt(3)](/curl_easy_setopt/3.md)* returns a CURLcode indicating success or error.

CURLE\_OK (0) means everything was OK, non-zero means an error occurred, see *[libcurl-errors(3)](/libcurl-errors/3.md)*.

## SEE ALSO

[**CURLOPT\_INFILESIZE\_LARGE**(3)](/CURLOPT_INFILESIZE_LARGE/3.md), [**CURLOPT\_RANGE**(3)](/CURLOPT_RANGE/3.md), [**CURLOPT\_RESUME\_FROM**(3)](/CURLOPT_RESUME_FROM/3.md)