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e3fe020089
Remove the PROTOCOLS section from the source files completely and instead generate them based on the header data in the curldown files. It also generates TLS backend information for options marked for TLS as protocol. Closes #13175
79 lines
1.6 KiB
Markdown
79 lines
1.6 KiB
Markdown
---
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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
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_INFILESIZE (3)
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- CURLOPT_RANGE (3)
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- CURLOPT_RESUME_FROM_LARGE (3)
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Protocol:
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- All
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---
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# NAME
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CURLOPT_RESUME_FROM - 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, long from);
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~~~
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# DESCRIPTION
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Pass a long as parameter. It contains the offset in number of bytes that you
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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 then appends the
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source file to the remote target file.
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If you need to resume a transfer beyond the 2GB limit, use
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CURLOPT_RESUME_FROM_LARGE(3) instead.
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# DEFAULT
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0, not used
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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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long size_of_file;
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curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com");
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/* resume upload at byte index 200 */
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curl_easy_setopt(curl, CURLOPT_RESUME_FROM, 200L);
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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, size_of_file);
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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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Always
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# RETURN VALUE
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Returns CURLE_OK
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