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CURLOPT_RESUME_FROM(3) curl_easy_setopt options CURLOPT_RESUME_FROM(3)

NAME

CURLOPT_RESUME_FROM - set a point to resume transfer from

SYNOPSIS

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

DESCRIPTION

Pass a long 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 will then append the source file to the remote target file.
If you need to resume a transfer beyond the 2GB limit, use CURLOPT_RESUME_FROM_LARGE(3) instead.

DEFAULT

0, not used

PROTOCOLS

HTTP, FTP, SFTP, FILE

EXAMPLE

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com");
/* resume upload at byte index 200 */ curl_easy_setopt(curl, CURLOPT_RESUME_FROM, 200L);
/* ask for upload */ curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
/* set total data amount to expect */ curl_easy_setopt(curl, CURLOPT_INFILESIZE, size_of_file);
/* Perform the request */ curl_easy_perform(curl); }

AVAILABILITY

Always

RETURN VALUE

Returns CURLE_OK

SEE ALSO

CURLOPT_RESUME_FROM_LARGE(3), CURLOPT_RANGE(3), CURLOPT_INFILESIZE(3),
February 3, 2016 libcurl 7.60.0