BIO_flush man page on MacOSX

Man page or keyword search:  
man Server   23457 pages
apropos Keyword Search (all sections)
Output format
MacOSX logo
[printable version]

BIO_ctrl(3)			    OpenSSL			   BIO_ctrl(3)

NAME
       BIO_ctrl, BIO_callback_ctrl, BIO_ptr_ctrl, BIO_int_ctrl, BIO_reset,
       BIO_seek, BIO_tell, BIO_flush, BIO_eof, BIO_set_close, BIO_get_close,
       BIO_pending, BIO_wpending, BIO_ctrl_pending, BIO_ctrl_wpending,
       BIO_get_info_callback, BIO_set_info_callback - BIO control operations

SYNOPSIS
	#include <openssl/bio.h>

	long BIO_ctrl(BIO *bp,int cmd,long larg,void *parg);
	long BIO_callback_ctrl(BIO *b, int cmd, void (*fp)(struct bio_st *, int, const char *, int, long, long));
	char * BIO_ptr_ctrl(BIO *bp,int cmd,long larg);
	long BIO_int_ctrl(BIO *bp,int cmd,long larg,int iarg);

	int BIO_reset(BIO *b);
	int BIO_seek(BIO *b, int ofs);
	int BIO_tell(BIO *b);
	int BIO_flush(BIO *b);
	int BIO_eof(BIO *b);
	int BIO_set_close(BIO *b,long flag);
	int BIO_get_close(BIO *b);
	int BIO_pending(BIO *b);
	int BIO_wpending(BIO *b);
	size_t BIO_ctrl_pending(BIO *b);
	size_t BIO_ctrl_wpending(BIO *b);

	int BIO_get_info_callback(BIO *b,bio_info_cb **cbp);
	int BIO_set_info_callback(BIO *b,bio_info_cb *cb);

	typedef void bio_info_cb(BIO *b, int oper, const char *ptr, int arg1, long arg2, long arg3);

DESCRIPTION
       BIO_ctrl(), BIO_callback_ctrl(), BIO_ptr_ctrl() and BIO_int_ctrl() are
       BIO "control" operations taking arguments of various types.  These
       functions are not normally called directly, various macros are used
       instead. The standard macros are described below, macros specific to a
       particular type of BIO are described in the specific BIOs manual page
       as well as any special features of the standard calls.

       BIO_reset() typically resets a BIO to some initial state, in the case
       of file related BIOs for example it rewinds the file pointer to the
       start of the file.

       BIO_seek() resets a file related BIO's (that is file descriptor and
       FILE BIOs) file position pointer to ofs bytes from start of file.

       BIO_tell() returns the current file position of a file related BIO.

       BIO_flush() normally writes out any internally buffered data, in some
       cases it is used to signal EOF and that no more data will be written.

       BIO_eof() returns 1 if the BIO has read EOF, the precise meaning of
       "EOF" varies according to the BIO type.

       BIO_set_close() sets the BIO b close flag to flag. flag can take the
       value BIO_CLOSE or BIO_NOCLOSE. Typically BIO_CLOSE is used in a
       source/sink BIO to indicate that the underlying I/O stream should be
       closed when the BIO is freed.

       BIO_get_close() returns the BIOs close flag.

       BIO_pending(), BIO_ctrl_pending(), BIO_wpending() and
       BIO_ctrl_wpending() return the number of pending characters in the BIOs
       read and write buffers.	Not all BIOs support these calls.
       BIO_ctrl_pending() and BIO_ctrl_wpending() return a size_t type and are
       functions, BIO_pending() and BIO_wpending() are macros which call
       BIO_ctrl().

RETURN VALUES
       BIO_reset() normally returns 1 for success and 0 or -1 for failure.
       File BIOs are an exception, they return 0 for success and -1 for
       failure.

       BIO_seek() and BIO_tell() both return the current file position on
       success and -1 for failure, except file BIOs which for BIO_seek()
       always return 0 for success and -1 for failure.

       BIO_flush() returns 1 for success and 0 or -1 for failure.

       BIO_eof() returns 1 if EOF has been reached 0 otherwise.

       BIO_set_close() always returns 1.

       BIO_get_close() returns the close flag value: BIO_CLOSE or BIO_NOCLOSE.

       BIO_pending(), BIO_ctrl_pending(), BIO_wpending() and
       BIO_ctrl_wpending() return the amount of pending data.

NOTES
       BIO_flush(), because it can write data may return 0 or -1 indicating
       that the call should be retried later in a similar manner to
       BIO_write().  The BIO_should_retry() call should be used and
       appropriate action taken is the call fails.

       The return values of BIO_pending() and BIO_wpending() may not reliably
       determine the amount of pending data in all cases. For example in the
       case of a file BIO some data may be available in the FILE structures
       internal buffers but it is not possible to determine this in a portably
       way. For other types of BIO they may not be supported.

       Filter BIOs if they do not internally handle a particular BIO_ctrl()
       operation usually pass the operation to the next BIO in the chain.
       This often means there is no need to locate the required BIO for a
       particular operation, it can be called on a chain and it will be
       automatically passed to the relevant BIO. However this can cause
       unexpected results: for example no current filter BIOs implement
       BIO_seek(), but this may still succeed if the chain ends in a FILE or
       file descriptor BIO.

       Source/sink BIOs return an 0 if they do not recognize the BIO_ctrl()
       operation.

BUGS
       Some of the return values are ambiguous and care should be taken. In
       particular a return value of 0 can be returned if an operation is not
       supported, if an error occurred, if EOF has not been reached and in the
       case of BIO_seek() on a file BIO for a successful operation.

SEE ALSO
       TBA

1.0.1f				  2014-01-06			   BIO_ctrl(3)
[top]

List of man pages available for MacOSX

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
...................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net