KProcIO Class Reference

#include <kprocio.h>

Inheritance diagram for KProcIO:

KProcess QObject List of all members.

Detailed Description

KProcIOA slightly simpler interface to KProcess.

This class provides a slightly simpler interface to the communication functions provided by KProcess. The simplifications are:

  • The buffer for a write is copied to an internal KProcIO buffer and maintained/freed appropriately. There is no need to be concerned with wroteStdin() signals _at_all_.
  • readln() reads a line of data and buffers any leftovers.
  • Conversion from/to unicode.
Basically, KProcIO gives you buffered I/O similar to fgets()/fputs().

Aside from these, and the fact that start() takes different parameters, use this class just like KProcess.

Author:
David Sweet

Definition at line 50 of file kprocio.h.


Signals

void readReady (KProcIO *pio)

Public Member Functions

 KProcIO (QTextCodec *codec=0)
 ~KProcIO ()
void setComm (Communication comm)
bool start (RunMode runmode=NotifyOnExit, bool includeStderr=false)
bool writeStdin (const QString &line, bool appendnewline=true)
bool writeStdin (const QCString &line, bool appendnewline)
bool writeStdin (const QByteArray &data)
KDE_DEPRECATED bool fputs (const QString &line, bool AppendNewLine=true)
void closeWhenDone ()
int readln (QString &line, bool autoAck=true, bool *partial=0)
KDE_DEPRECATED int fgets (QString &line, bool autoAck=false)
void resetAll ()
void ackRead ()
void enableReadSignals (bool enable)

Protected Slots

void received (KProcess *proc, char *buffer, int buflen)
void sent (KProcess *)

Protected Member Functions

void controlledEmission ()
virtual void virtual_hook (int id, void *data)

Protected Attributes

QPtrList< QByteArrayoutbuffer
QCString recvbuffer
QTextCodeccodec
int rbi
bool needreadsignal
bool readsignalon
bool writeready

Constructor & Destructor Documentation

KProcIO::KProcIO ( QTextCodec codec = 0  ) 

Constructor.

Definition at line 38 of file kprocio.cpp.

KProcIO::~KProcIO (  ) 

Destructor.

Definition at line 55 of file kprocio.cpp.


Member Function Documentation

void KProcIO::ackRead (  ) 

Call this after you have finished processing a readReady() signal.

This call need not be made in the slot that was signalled by readReady(). You won't receive any more readReady() signals until you acknowledge with ackRead(). This prevents your slot from being reentered while you are still processing the current data. If this doesn't matter, then call ackRead() right away in your readReady()-processing slot.

Definition at line 196 of file kprocio.cpp.

void KProcIO::closeWhenDone (  ) 

Closes stdin after all data has been send.

Definition at line 154 of file kprocio.cpp.

void KProcIO::enableReadSignals ( bool  enable  ) 

Turns readReady() signals on and off.

You can turn this off at will and not worry about losing any data. (as long as you turn it back on at some point...)

Parameters:
enable true to turn the signals on, false to turn them off

Definition at line 217 of file kprocio.cpp.

KDE_DEPRECATED int KProcIO::fgets ( QString line,
bool  autoAck = false 
) [inline]

This function calls readln().

Parameters:
line is used to store the line that was read.
autoAck when true, ackRead() is called for you.
Returns:
the number of characters read, or -1 if no data is available.
Deprecated:
use readln. Note that it has an inverted autoAck default, though.

Definition at line 162 of file kprocio.h.

KDE_DEPRECATED bool KProcIO::fputs ( const QString line,
bool  AppendNewLine = true 
) [inline]

This function just calls writeStdin().

Parameters:
line Text to write.
AppendNewLine if true, a newline '\n' is appended.
Returns:
true if successful, false otherwise
Deprecated:

Definition at line 123 of file kprocio.h.

int KProcIO::readln ( QString line,
bool  autoAck = true,
bool *  partial = 0 
)

Reads a line of text (up to and including '\n').

Use readln() in response to a readReady() signal. You may use it multiple times if more than one line of data is available. Be sure to use ackRead() when you have finished processing the readReady() signal. This informs KProcIO that you are ready for another readReady() signal.

readln() never blocks.

autoAck==true makes these functions call ackRead() for you.

Parameters:
line is used to store the line that was read.
autoAck when true, ackRead() is called for you.
partial when provided the line is returned even if it does not contain a '\n'. *partial will be set to false if the line contains a '\n' and false otherwise.
Returns:
the number of characters read, or -1 if no data is available.

Definition at line 225 of file kprocio.cpp.

void KProcIO::readReady ( KProcIO pio  )  [signal]

Emitted when the process is ready for reading.

Parameters:
pio the process that emitted the signal
See also:
enableReadSignals()

void KProcIO::resetAll (  ) 

Reset the class.

Doesn't kill the process.

Definition at line 61 of file kprocio.cpp.

void KProcIO::setComm ( Communication  comm  ) 

Sets the communication mode to be passed to KProcess::start() by start().

The default communication mode is KProcess::All. You probably want to use this function in conjunction with KProcess::setUsePty().

Parameters:
comm the communication mode

Definition at line 83 of file kprocio.cpp.

bool KProcIO::start ( RunMode  runmode = NotifyOnExit,
bool  includeStderr = false 
)

Starts the process.

It will fail in the following cases:

  • The process is already running.
  • The command line argument list is empty.
  • The starting of the process failed (could not fork).
  • The executable was not found.
Parameters:
runmode For a detailed description of the various run modes, have a look at the general description of the KProcess class.
includeStderr If true, data from both stdout and stderr is listened to. If false, only stdout is listened to.
Returns:
true on success, false on error.

Definition at line 88 of file kprocio.cpp.

bool KProcIO::writeStdin ( const QByteArray data  ) 

Writes data to stdin of the process.

Parameters:
data Data to write.
Returns:
true if successful, false otherwise

Definition at line 139 of file kprocio.cpp.

bool KProcIO::writeStdin ( const QCString line,
bool  appendnewline 
)

Writes text to stdin of the process.

Parameters:
line Text to write.
appendnewline if true, a newline '\n' is appended.
Returns:
true if successful, false otherwise

Definition at line 110 of file kprocio.cpp.

bool KProcIO::writeStdin ( const QString line,
bool  appendnewline = true 
)

Writes text to stdin of the process.

Parameters:
line Text to write.
appendnewline if true, a newline '\n' is appended.
Returns:
true if successful, false otherwise

Definition at line 105 of file kprocio.cpp.


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