CURLOPT_RESUME_FROM(3)

1CURLOPT_RESUME_FROM(3)     curl_easy_setopt options     CURLOPT_RESUME_FROM(3)
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NAME

6       CURLOPT_RESUME_FROM - set a point 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
12       from);
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DESCRIPTION

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

29       0, not used
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PROTOCOLS

32       HTTP, FTP, SFTP, FILE
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EXAMPLE

35       CURL *curl = curl_easy_init();
36       if(curl) {
37         curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com");
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39         /* resume upload at byte index 200 */
40         curl_easy_setopt(curl, CURLOPT_RESUME_FROM, 200L);
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42         /* ask for upload */
43         curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
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45         /* set total data amount to expect */
46         curl_easy_setopt(curl, CURLOPT_INFILESIZE, size_of_file);
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48         /* Perform the request */
49         curl_easy_perform(curl);
50       }
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AVAILABILITY

53       Always
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RETURN VALUE

56       Returns CURLE_OK
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