DOKK / manpages / debian 10 / libcurl4-doc / CURLOPT_APPEND.3.en
CURLOPT_APPEND(3) curl_easy_setopt options CURLOPT_APPEND(3)

CURLOPT_APPEND - enable appending to the remote file

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_APPEND, long append);

A long parameter set to 1 tells the library to append to the remote file instead of overwrite it. This is only useful when uploading to an FTP site.

0 (disabled)

FTP

CURL *curl = curl_easy_init();
if(curl) {

curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/dir/to/newfile");
curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
curl_easy_setopt(curl, CURLOPT_APPEND, 1L);
curl_easy_perform(curl); }

This option was known as CURLOPT_FTPAPPEND up to 7.16.4

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

CURLOPT_DIRLISTONLY(3), CURLOPT_RESUME_FROM(3), CURLOPT_UPLOAD(3),

March 6, 2016 libcurl 7.64.0