80 lines
1.8 KiB
Markdown
80 lines
1.8 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_RESUME_FROM_LARGE
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_INFILESIZE_LARGE (3)
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- CURLOPT_RANGE (3)
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- CURLOPT_RESUME_FROM (3)
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---
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# NAME
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CURLOPT_RESUME_FROM_LARGE - offset to resume transfer from
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESUME_FROM_LARGE,
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curl_off_t from);
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~~~
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# DESCRIPTION
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Pass a curl_off_t as parameter. It contains the offset in number of bytes that
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you want the transfer to start from. Set this option to 0 to make the transfer
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start from the beginning (effectively disabling resume). For FTP, set this
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option to -1 to make the transfer start from the end of the target file
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(useful to continue an interrupted upload).
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When doing uploads with FTP, the resume position is where in the local/source
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file libcurl should try to resume the upload from and it appends the source
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file to the remote target file.
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# DEFAULT
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0, not used
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# PROTOCOLS
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HTTP, FTP, SFTP, FILE
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_off_t resume_position; /* get it somehow */
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curl_off_t file_size; /* get it somehow as well */
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curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com");
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/* resuming upload at this position, possibly beyond 2GB */
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curl_easy_setopt(curl, CURLOPT_RESUME_FROM_LARGE, resume_position);
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/* ask for upload */
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curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
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/* set total data amount to expect */
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curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, file_size);
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/* Perform the request */
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curl_easy_perform(curl);
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.11.0
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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