How to catch the exception

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curlopt_ftp_alternative_to_user

CURLOPT_FTP_ALTERNATIVE_TO_USER(3)			     curl_easy_setopt options				CURLOPT_FTP_ALTERNATIVE_TO_USER(3)

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 * as parameter, pointing to a string which will be used to authenticate if the usual FTP "USER user" and "PASS password" nego-
       tiation fails. This is currently only known to be required when connecting to Tumbleweed's Secure Transport FTPS server using  client  cer-
       tificates for authentication.

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

DEFAULT

       NULL

PROTOCOLS

       FTP

EXAMPLE

       TODO

AVAILABILITY

       Added in 7.15.5

RETURN VALUE

       Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO

       CURLOPT_FTP_SKIP_PASV_IP(3), CURLOPT_FTP_RESPONSE_TIMEOUT(3),

libcurl 7.54.0							 December 21, 2016				CURLOPT_FTP_ALTERNATIVE_TO_USER(3)

UNIX for Dummies Questions & Answers