CURLOPT\_RESUME\_FROM\_LARGE(3) Library Functions Manual CURLOPT\_RESUME\_FROM\_LARGE(3)

# [NAME](#NAME)

CURLOPT\_RESUME\_FROM\_LARGE - offset to resume transfer from

# [SYNOPSIS](#SYNOPSIS)

```
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESUME_FROM_LARGE,


                          curl_off_t from);
```

# [DESCRIPTION](#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](#DEFAULT)

0, not used

# [PROTOCOLS](#PROTOCOLS)

This functionality affects all supported protocols

# [EXAMPLE](#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](#AVAILABILITY)

Added in curl 7.11.0

# [RETURN VALUE](#RETURN_VALUE)

[*curl\_easy\_setopt(3)*](/man/os/curl/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)*](/man/os/curl/libcurl-errors.3).

# [SEE ALSO](#SEE_ALSO)

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

2026-09-24 libcurl

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Document: CURLOPT_RESUME_FROM_LARGE(3) from curl 8.22.0-r3 (Chainguard OS)
Source: https://github.com/curl/curl.git