ssl/bio.h&gt;

 const BIO_METHOD *BIO_s_file(void);
 BIO *BIO_new_file(const char *filename, const char *mode);
 BIO *BIO_new_fp(FILE *stream, int flags);

 BIO_set_fp(BIO *b, FILE *fp, int flags);
 BIO_get_fp(BIO *b, FILE **fpp);

 int BIO_read_filename(BIO *b, char *name);
 int BIO_write_filename(BIO *b, char *name);
 int BIO_append_filename(BIO *b, char *name);
 int BIO_rw_filename(BIO *b, char *name);</code></pre>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>BIO_s_file() returns the BIO file method. As it