CURLOPT_APPEND(3) Library Functions Manual CURLOPT_APPEND(3)
NAME
CURLOPT_APPEND - append to the remote file
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_APPEND, long append);
DESCRIPTION
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.
DEFAULT
0 (disabled)
PROTOCOLS
This functionality affects ftp and sftp
EXAMPLE
int main(void)
{
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);
}
}
HISTORY
This option was known as CURLOPT_FTPAPPEND up to 7.16.4
AVAILABILITY
Added in curl 7.17.0
RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred,
see libcurl-errors(3).
SEE ALSO
CURLOPT_DIRLISTONLY(3), CURLOPT_RESUME_FROM(3), CURLOPT_UPLOAD(3)
libcurl 2026-07-12 CURLOPT_APPEND(3)
Generated by dwww version 1.16 on Sat Oct 3 05:45:01 CEST 2026.