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.\" generated by cd2nroff 0.1 from CURLOPT_FTP_ALTERNATIVE_TO_USER.md
.TH CURLOPT_FTP_ALTERNATIVE_TO_USER 3 "2025-06-06" libcurl
.SH NAME
CURLOPT_FTP_ALTERNATIVE_TO_USER \- command to use instead of USER with FTP
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_ALTERNATIVE_TO_USER,
char *cmd);
.fi
.SH DESCRIPTION
Pass a char pointer as parameter, pointing to a string which is used to
authenticate if the usual FTP "USER user" and "PASS password" negotiation
fails. This is currently only known to be required when connecting to
Tumbleweed\(aqs Secure Transport FTPS server using client certificates for
authentication.
The application does not have to keep the string around after setting this
option.
.SH DEFAULT
NULL
.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/foo.bin");
curl_easy_setopt(curl, CURLOPT_FTP_ALTERNATIVE_TO_USER, "two users");
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in curl 7.15.5
.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_FTP_ACCOUNT (3),
.BR CURLOPT_FTP_SKIP_PASV_IP (3),
.BR CURLOPT_SERVER_RESPONSE_TIMEOUT (3),
.BR CURLOPT_USERNAME (3)