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CURLOPT_FTP_ALTERNATIVE_TO_USER(3)                    Library Functions Manual


NAME

       CURLOPT_FTP_ALTERNATIVE_TO_USER - command to use instead of USER with
       FTP


SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FTP_ALTERNATIVE_TO_USER,
                                 char *cmd);


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's Secure Transport FTPS server using client
       certificates for authentication.

       The application does not have to keep the string around after setting
       this option.


DEFAULT

       NULL


PROTOCOLS

       This functionality affects ftp only


EXAMPLE

       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);
         }
       }


AVAILABILITY

       Added in curl 7.15.5


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_FTP_ACCOUNT(3), CURLOPT_FTP_SKIP_PASV_IP(3),
       CURLOPT_SERVER_RESPONSE_TIMEOUT(3), CURLOPT_USERNAME(3)

libcurl                           2025-02-08
                                            CURLOPT_FTP_ALTERNATIVE_TO_USER(3)

curl 8.12.0 - Generated Sat Feb 15 07:12:57 CST 2025
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