#include <openssl/bio.h> const BIO_METHOD *BIO_s_fd(void); int BIO_set_fd(BIO *b, int fd, int c); int BIO_get_fd(BIO *b, int *c); BIO *BIO_new_fd(int fd, int close_flag);
BIO_read_ex() and BIO_write_ex() read or write the underlying descriptor. BIO_puts() is supported but BIO_gets() is not.
If the close flag is set then close() is called on the underlying file descriptor when the BIO is freed.
BIO_reset() attempts to change the file pointer to the start of file such as by using lseek(fd, 0, 0).
BIO_seek() sets the file pointer to position ofs from start of file such as by using lseek(fd, ofs, 0).
BIO_tell() returns the current file position such as by calling lseek(fd, 0, 1).
BIO_set_fd() sets the file descriptor of BIO b to fd and the close flag to c.
BIO_get_fd() places the file descriptor in c if it is not NULL, it also returns the file descriptor.
File descriptor BIOs should not be used for socket I/O. Use socket BIOs instead.
BIO_set_fd() always returns 1.
BIO_get_fd() returns the file descriptor or -1 if the BIO has not been initialized.
BIO *out; out = BIO_new_fd(fileno(stdout), BIO_NOCLOSE); BIO_printf(out, "Hello World\n"); BIO_free(out);
Licensed under the OpenSSL license (the ``License''). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.