plucky (3) CURLOPT_SSH_KNOWNHOSTS.3.gz

NAME

       CURLOPT_SSH_KNOWNHOSTS - filename holding the SSH known hosts

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_KNOWNHOSTS, char *fname);

DESCRIPTION

       Pass  a  pointer  to  a  null-terminated  string  holding the filename of the known_host file to use. The
       known_hosts file should use the OpenSSH file format. If this file  is  specified,  libcurl  only  accepts
       connections  with  hosts  that  are  known  and  present  in  that  file, with a matching public key. Use
       CURLOPT_SSH_KEYFUNCTION(3) to alter the default behavior on host and key matches and mismatches.

       We strongly suggest users doing SCP or SFTP transfers to set this option to make sure  that  the  network
       communication is done with the intended server and not an impostor.

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

       Using  this option multiple times makes the last set string override the previous ones. Set it to NULL to
       disable its use again.

DEFAULT

       NULL

PROTOCOLS

       This functionality affects scp and sftp

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/file");
           curl_easy_setopt(curl, CURLOPT_SSH_KNOWNHOSTS,
                            "/home/clarkkent/.ssh/known_hosts");
           res = curl_easy_perform(curl);
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in curl 7.19.6

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_SSH_AUTH_TYPES(3), CURLOPT_SSH_HOST_PUBLIC_KEY_MD5(3), CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256(3)