KDESu::PtyProcess Class Reference

#include <KDESu/PtyProcess>

Inheritance diagram for KDESu::PtyProcess:

Public Types
enum	checkPidStatus { Error = -1 , NotExited = -2 , Killed = -3 }

Public Member Functions
int	enableLocalEcho (bool enable=true)
int	exec (const QByteArray &command, const QList< QByteArray > &args)
int	fd () const
int	pid () const
QByteArray	readAll (bool block=true)
QByteArray	readLine (bool block=true)
void	setEnvironment (const QList< QByteArray > &env)
void	setErase (bool erase)
void	setExitString (const QByteArray &exit)
void	setTerminal (bool terminal)
void	unreadLine (const QByteArray &line, bool addNewline=true)
int	waitForChild ()
int	waitSlave ()
void	writeLine (const QByteArray &line, bool addNewline=true)

Static Public Member Functions
static bool	checkPid (pid_t pid)
static int	checkPidExited (pid_t pid)
static int	waitMS (int fd, int ms)

Protected Member Functions
KDESU_NO_EXPORT	PtyProcess (PtyProcessPrivate &dd)
QList< QByteArray >	environment () const
virtual void	virtual_hook (int id, void *data)

Protected Attributes
std::unique_ptr< PtyProcessPrivate > const	d_ptr
QByteArray	m_command
bool	m_erase
QByteArray	m_exitString
int	m_pid
bool	m_terminal

Detailed Description

Synchronous communication with tty programs.

PtyProcess provides synchronous communication with tty based programs. The communications channel used is a pseudo tty (as opposed to a pipe) This means that programs which require a terminal will work.

Definition at line 35 of file ptyprocess.h.

Member Enumeration Documentation

checkPidStatus

enum KDESu::PtyProcess::checkPidStatus

Error return values for checkPidExited()

Enumerator
Error	No child.
NotExited	Child hasn't exited.
Killed	Child terminated by signal.

Definition at line 39 of file ptyprocess.h.

Constructor & Destructor Documentation

PtyProcess() [1/2]

KDESu::PtyProcess::PtyProcess

(

)

Definition at line 115 of file ptyprocess.cpp.

PtyProcess() [2/2]

KDESu::PtyProcess::PtyProcess ( PtyProcessPrivate & dd )

explicitprotected

Definition at line 120 of file ptyprocess.cpp.

Member Function Documentation

checkPid()

bool KDESu::PtyProcess::checkPid ( pid_t pid )

static

Basic check for the existence of pid.

Returns true iff pid is an extant process, (one you could kill - see man kill(2) for signal 0).

Definition at line 73 of file ptyprocess.cpp.

checkPidExited()

int KDESu::PtyProcess::checkPidExited ( pid_t pid )

static

Check process exit status for process pid.

If child pid has exited, return its exit status, (which may be zero). On error (no child, no exit), return -1. If child has not exited, return -2.

Definition at line 93 of file ptyprocess.cpp.

enableLocalEcho()

int KDESu::PtyProcess::enableLocalEcho

(

bool

enable = true

)

Enables/disables local echo on the pseudo tty.

Definition at line 393 of file ptyprocess.cpp.

environment()

QList< QByteArray > KDESu::PtyProcess::environment ( ) const

protected

Returns the additional environment variables set by setEnvironment()

Definition at line 168 of file ptyprocess.cpp.

exec()

int KDESu::PtyProcess::exec	(	const QByteArray &	command,
		const QList< QByteArray > &	args )

Forks off and execute a command.

The command's standard in and output are connected to the pseudo tty. They are accessible with readLine and writeLine.

Parameters

command	The command to execute.
args	The arguments to the command.

Returns

0 on success, -1 on error. errno might give more information then.

Definition at line 282 of file ptyprocess.cpp.

fd()

int KDESu::PtyProcess::fd

(

)

const

Returns the filedescriptor of the process.

Definition at line 155 of file ptyprocess.cpp.

pid()

int KDESu::PtyProcess::pid

(

)

const

Returns the pid of the process.

Definition at line 162 of file ptyprocess.cpp.

readAll()

QByteArray KDESu::PtyProcess::readAll

(

bool

block = true

)

Read all available output from the program's standard out.

Parameters

block

If no output is in the buffer, should the function block (else it will return an empty QByteArray)?

Returns

The output.

Definition at line 175 of file ptyprocess.cpp.

readLine()

QByteArray KDESu::PtyProcess::readLine

(

bool

block = true

)

Reads a line from the program's standard out.

Depending on the block parameter, this call blocks until something was read. Note that in some situations this function will return less than a full line of output, but never more. Newline characters are stripped.

Parameters

block

Block until a full line is read?

Returns

The output string.

Definition at line 228 of file ptyprocess.cpp.

setEnvironment()

void KDESu::PtyProcess::setEnvironment

(

const QList< QByteArray > &

env

)

Set additinal environment variables.

Set additional environment variables.

Definition at line 148 of file ptyprocess.cpp.

setErase()

void KDESu::PtyProcess::setErase

(

bool

erase

)

Overwrites the password as soon as it is used.

Relevant only to some subclasses.

Definition at line 411 of file ptyprocess.cpp.

setExitString()

void KDESu::PtyProcess::setExitString

(

const QByteArray &

exit

)

Sets the exit string.

If a line of program output matches this, waitForChild() will terminate the program and return.

Definition at line 274 of file ptyprocess.cpp.

setTerminal()

void KDESu::PtyProcess::setTerminal

(

bool

terminal

)

Enables/disables terminal output.

Relevant only to some subclasses.

Definition at line 406 of file ptyprocess.cpp.

unreadLine()

void KDESu::PtyProcess::unreadLine	(	const QByteArray &	line,
		bool	addNewline = true )

Puts back a line of input.

Parameters

line	The line to put back.
addNewline	Adds a ' ' to the line.

Definition at line 261 of file ptyprocess.cpp.

virtual_hook()

void KDESu::PtyProcess::virtual_hook ( int id, void * data )

protectedvirtual

Standard hack to add virtual methods in a BC way.

Unused.

Reimplemented in KDESu::SshProcess, KDESu::StubProcess, and KDESu::SuProcess.

Definition at line 545 of file ptyprocess.cpp.

waitForChild()

int KDESu::PtyProcess::waitForChild

(

)

Waits for the child to exit.

See also setExitString.

Definition at line 423 of file ptyprocess.cpp.

waitMS()

int KDESu::PtyProcess::waitMS ( int fd, int ms )

static

Wait ms milliseconds (ie.

1/10th of a second is 100ms), using fd as a filedescriptor to wait on. Returns select(2)'s result, which is -1 on error, 0 on timeout, or positive if there is data on one of the selected fd's.

ms must be in the range 0..999 (i.e. the maximum wait duration is 999ms, almost one second).

Definition at line 54 of file ptyprocess.cpp.

waitSlave()

int KDESu::PtyProcess::waitSlave

(

)

Waits until the pty has cleared the ECHO flag.

This is useful when programs write a password prompt before they disable ECHO. Disabling it might flush any input that was written.

Definition at line 368 of file ptyprocess.cpp.

writeLine()

void KDESu::PtyProcess::writeLine	(	const QByteArray &	line,
		bool	addNewline = true )

Writes a line of text to the program's standard in.

Parameters

line	The text to write.
addNewline	Adds a ' ' to the line.

Definition at line 251 of file ptyprocess.cpp.

Member Data Documentation

d_ptr

std::unique_ptr<PtyProcessPrivate> const KDESu::PtyProcess::d_ptr

protected

Definition at line 194 of file ptyprocess.h.

m_command

QByteArray KDESu::PtyProcess::m_command

protected

Unused.

Definition at line 186 of file ptyprocess.h.

m_erase

bool KDESu::PtyProcess::m_erase

protected

See also

setErase()

Definition at line 181 of file ptyprocess.h.

m_exitString

QByteArray KDESu::PtyProcess::m_exitString

protected

String to scan for in output that indicates child has exited.

Definition at line 187 of file ptyprocess.h.

m_pid

int KDESu::PtyProcess::m_pid

protected

PID of child process.

Definition at line 185 of file ptyprocess.h.

m_terminal

bool KDESu::PtyProcess::m_terminal

protected

Indicates running in a terminal, causes additional newlines to be printed after output.

Set to false in constructor.

See also

setTerminal()

Definition at line 182 of file ptyprocess.h.

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

• ptyprocess.h
• ptyprocess.cpp