 
			| GNU/Linux | CentOS 2.1AS(Slurm) | |
|  | SSL_get_fd(3ssl) |  | 
SSL_get_fd − get file descriptor linked to an SSL object
#include <openssl/ssl.h> int SSL_get_fd(SSL *ssl); int SSL_get_rfd(SSL *ssl); int SSL_get_wfd(SSL *ssl);
SSL_get_fd() returns the file descriptor which is linked to ssl. SSL_get_rfd() and SSL_get_wfd() return the file descriptors for the read or the write channel, which can be different. If the read and the write channel are different, SSL_get_fd() will return the file descriptor of the read channel.
The following return values can occur:
| -1 | The operation failed, because the underlying BIO is not of the correct type (suitable for file descriptors). | ||
| >=0 | The file descriptor linked to ssl. | 
SSL_set_fd(3), ssl(3) , bio(3)
|  | SSL_get_fd(3ssl) |  |