BIO_get_fd man page on DigitalUNIX

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BIO_s_fd(3)							   BIO_s_fd(3)

       BIO_s_fd, BIO_set_fd, BIO_get_fd, BIO_new_fd - File descriptor BIO

       #include <openssl/bio.h>

       BIO_METHOD *   BIO_s_fd(
	       void			    );			       #define
       BIO_set_fd(b,fd,c)    BIO_int_ctrl(b,BIO_C_SET_FD,c,fd)	       #define
       BIO_get_fd(b,c)	BIO_ctrl(b,BIO_C_GET_FD,0,(char *)c)

       BIO *BIO_new_fd(
	       int fd,
	       int close_flag );

       The BIO_s_fd() function returns the file descriptor BIO method. This is
       a wrapper around the  platform's	 file  descriptor  routines,  such  as
       read() and write().

       The  BIO_read()	and BIO_write() functions read or write the underlying
       descriptor.  BIO_puts() is supported, but BIO_gets() is not.

       If the close flag is set then then close() is called on the  underlying
       file descriptor when the BIO is freed.

       The  BIO_reset()	 function  attempts  to change the file pointer to the
       start of file using lseek(fd, 0, 0).

       The BIO_seek() function sets the file  pointer  to  position  ofs  from
       start of file using lseek(fd, ofs, 0).

       The  BIO_tell()	function  returns the current file position by calling
       lseek(fd, 0, 1).

       The BIO_set_fd() function sets the file descriptor of BIO b to  fd  and
       the close flag to c.

       The  BIO_get_fd() function places the file descriptor in c if it is not
       NULL. It also returns the file descriptor.  If c is not NULL it	should
       be of type (int *).

       The  BIO_new_fd()  function  returns a file descriptor BIO using fd and

       The behavior of the BIO_read() and BIO_write() functions depends on the
       behavior	 of the platform's read() and write() calls on the descriptor.
       If the underlying  file descriptor is in a nonblocking  mode  then  the
       BIO will behave in the manner described in the BIO_read(3) and

       BIO_should_retry(3) reference pages.

       File descriptor BIOs should not be used for socket I/O. Use socket BIOs

       BIO_s_fd() returns the file descriptor BIO method.

       BIO_reset() returns zero for success  and  -1  if  an  error  occurred.
       BIO_seek()  and BIO_tell() return the current file position or -1 is an
       error occurred. These values reflect the underlying lseek() behavior.

       BIO_set_fd() always returns 1.

       BIO_get_fd() returns the file descriptor or -1 if the BIO has not  been

       BIO_new_fd()  returns  the  newly  allocated  BIO  or  NULL is an error

       This is a file descriptor BIO version of "Hello World": BIO *out; out =
       BIO_new_fd(fileno(stdout),    BIO_NOCLOSE);    BIO_printf(out,	"Hello
       World\n"); BIO_free(out);

       Functions:   BIO_seek(3),   BIO_tell(3),	  BIO_reset(3),	  BIO_read(3),
       BIO_write(3),	   BIO_puts(3),	      BIO_gets(3),	BIO_printf(3),
       BIO_set_close(3), BIO_get_close(3)


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