ucommon::pipestream Class Reference

Streamable pipe socket connection. More...

#include <stream.h>

Inheritance diagram for ucommon::pipestream:

Collaboration diagram for ucommon::pipestream:

Public Types
enum	access_t { RDONLY, WRONLY, RDWR }

Public Member Functions
void	cancel (void)
int	close (void)
	Close an active stream connection. More...
void	open (const char *path, access_t access, char **args, char **env=NULL, size_t buffering=512)
	Open a stream connection to a pipe service. More...
	operator bool () const
	See if stream connection is active. More...
bool	operator! () const
	See if stream is disconnected. More...
	pipestream ()
	Create an unopened pipe stream.
	pipestream (const char *command, access_t access, char **args, char **env=NULL, size_t size=512)
	Create child process and start pipe. More...
void	terminate (void)
	Force terminate child and close.
virtual	~pipestream ()
	Destroy a pipe stream.
Public Member Functions inherited from ucommon::StreamBuffer
bool	is_open (void) const
	operator bool () const
bool	operator! () const
int	sync (void)
	Flush the stream input and output buffers, writes pending output. More...

Protected Member Functions
int	overflow (int ch)
	This streambuf method is used to write the output buffer through the established pipe connection. More...
void	release (void)
	Release the stream, detach/do not wait for the process.
int	underflow (void)
	This streambuf method is used to load the input buffer through the established pipe connection. More...
Protected Member Functions inherited from ucommon::StreamBuffer
void	allocate (size_t size)
void	release (void)
int	uflow ()
	This streambuf method is used for doing unbuffered reads through the establish tcp socket connection when in interactive mode. More...

Protected Attributes
shell::pid_t	pid
fsys_t	rd
fsys_t	wr
Protected Attributes inherited from ucommon::StreamBuffer
size_t	bufsize
char *	gbuf
char *	pbuf

Detailed Description

Streamable pipe socket connection.

This creates a stream between a parent and child process. As a stream class, data can be exchanged using the << and >> operators.

Author

David Sugar dyfet.nosp@m.@gnu.nosp@m.telep.nosp@m.hony.nosp@m..org

Definition at line 237 of file stream.h.

Constructor & Destructor Documentation

pipestream()

ucommon::pipestream::pipestream	(	const char *	command,
		access_t	access,
		char **	args,
		char **	env = NULL,
		size_t	size = 512
	)

Create child process and start pipe.

Parameters

path	to execute.
access	mode of pipe stream.
args	to pass to command.
env	to create in child.
size	of buffer.

Member Function Documentation

close()

int ucommon::pipestream::close

(

void

)

Close an active stream connection.

This waits for the child to terminate.

open()

void ucommon::pipestream::open	(	const char *	path,
		access_t	access,
		char **	args,
		char **	env = NULL,
		size_t	buffering = 512
	)

Open a stream connection to a pipe service.

Parameters

path	to execute.
access	mode of stream.
args	to pass to command.
env	to create in child process.
buffering	size to use.

operator bool()

ucommon::pipestream::operator bool ( ) const

inline

See if stream connection is active.

Returns

true if stream is active.

Definition at line 302 of file stream.h.

operator!()

bool ucommon::pipestream::operator! ( ) const

inline

See if stream is disconnected.

Returns

true if stream disconnected.

Definition at line 310 of file stream.h.

overflow()

int ucommon::pipestream::overflow ( int  ch )

protected

This streambuf method is used to write the output buffer through the established pipe connection.

Parameters

ch	char to push through.

Returns

char pushed through.

underflow()

int ucommon::pipestream::underflow ( void  )

protected

This streambuf method is used to load the input buffer through the established pipe connection.

Returns

char from get buffer, EOF if not connected.

---

The documentation for this class was generated from the following file:

• ucommon/stream.h