CURLOPT_RESUME_FROM(3)

1CURLOPT_RESUME_FROM(3)              libcurl             CURLOPT_RESUME_FROM(3)
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NAME

6       CURLOPT_RESUME_FROM - offset to resume transfer from
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SYNOPSIS

9       #include <curl/curl.h>
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11       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESUME_FROM, long from);
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DESCRIPTION

14       Pass  a  long  as  parameter. It contains the offset in number of bytes
15       that you want the transfer to start from. Set this option to 0 to  make
16       the  transfer  start from the beginning (effectively disabling resume).
17       For FTP, set this option to -1 to make the transfer start from the  end
18       of the target file (useful to continue an interrupted upload).
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20       When  doing  uploads  with FTP, the resume position is where in the lo‐
21       cal/source file libcurl should try to resume the  upload  from  and  it
22       will then append the source file to the remote target file.
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24       If  you need to resume a transfer beyond the 2GB limit, use CURLOPT_RE‐
25       SUME_FROM_LARGE(3) instead.
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DEFAULT

28       0, not used
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PROTOCOLS

31       HTTP, FTP, SFTP, FILE
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EXAMPLE

34       CURL *curl = curl_easy_init();
35       if(curl) {
36         curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com");
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38         /* resume upload at byte index 200 */
39         curl_easy_setopt(curl, CURLOPT_RESUME_FROM, 200L);
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41         /* ask for upload */
42         curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
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44         /* set total data amount to expect */
45         curl_easy_setopt(curl, CURLOPT_INFILESIZE, size_of_file);
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47         /* Perform the request */
48         curl_easy_perform(curl);
49       }
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AVAILABILITY

52       Always
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RETURN VALUE

55       Returns CURLE_OK
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