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Viewing File: CURLOPT_FTP_USE_EPRT.3

.\" generated by cd2nroff 0.1 from CURLOPT_FTP_USE_EPRT.md
.TH CURLOPT_FTP_USE_EPRT 3 "2025-06-27" libcurl
.SH NAME
CURLOPT_FTP_USE_EPRT \- use EPRT for FTP
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_USE_EPRT, long enabled);
.fi
.SH DESCRIPTION
Pass a long. If the value is 1, it tells curl to use the EPRT command when
doing active FTP downloads (which is enabled by
\fICURLOPT_FTPPORT(3)\fP). Using EPRT means that libcurl first attempts to use
EPRT before using PORT, but if you pass zero to this option, it avoids using
EPRT, only plain PORT.

The EPRT command is a slightly newer addition to the FTP protocol than PORT
and is the preferred command to use since it enables IPv6 to be used. Old FTP
servers might not support it, which is why libcurl has a fallback mechanism.
Sometimes that fallback is not enough and then this option might come handy.

If the server is an IPv6 host, this option has no effect as EPRT is necessary
then.
.SH DEFAULT
.SH PROTOCOLS
This functionality affects ftp only
.SH EXAMPLE
.nf
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");

    /* contact us back, aka "active" FTP */
    curl_easy_setopt(curl, CURLOPT_FTPPORT, "-");

    /* FTP the way the neanderthals did it */
    curl_easy_setopt(curl, CURLOPT_FTP_USE_EPRT, 0L);

    res = curl_easy_perform(curl);

    curl_easy_cleanup(curl);
  }
}
.fi
.SH AVAILABILITY
Added in curl 7.10.5
.SH RETURN VALUE
\fIcurl_easy_setopt(3)\fP returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non\-zero means an error occurred, see
\fIlibcurl\-errors(3)\fP.
.SH SEE ALSO
.BR CURLOPT_FTPPORT (3),
.BR CURLOPT_FTP_USE_EPSV (3)
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