kdiskfreesp.cpp
/*
* kdiskfreesp.cpp
*
* Copyright (c) 1999 Michael Kropfberger <michael.kropfberger@gmx.net>
*
* Requires the Qt widget libraries, available at no cost at
* http://www.troll.no/
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License version 2 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "kdiskfreesp.h"
#include <qfile.h>
#include <qtextstream.h>
#include <kdebug.h>
#include <kprocess.h>
#include <kio/global.h>
#include <config-kfile.h>
#include "kdiskfreesp.moc"
#define DF_COMMAND "df"
#define DF_ARGS "-k"
#define NO_FS_TYPE true
#define BLANK ' '
#define FULL_PERCENT 95.0
/***************************************************************************
* constructor
**/
KDiskFreeSp::KDiskFreeSp(QObject *parent, const char *name)
: QObject(parent,name)
{
dfProc = new KProcess(); Q_CHECK_PTR(dfProc);
dfProc->setEnvironment("LANGUAGE", "C");
connect( dfProc, SIGNAL(receivedStdout(KProcess *, char *, int) ),
this, SLOT (receivedDFStdErrOut(KProcess *, char *, int)) );
connect(dfProc,SIGNAL(processExited(KProcess *) ),
this, SLOT(dfDone() ) );
readingDFStdErrOut=false;
}
/***************************************************************************
* destructor
**/
KDiskFreeSp::~KDiskFreeSp()
{
delete dfProc;
}
/***************************************************************************
* is called, when the df-command writes on StdOut
**/
void KDiskFreeSp::receivedDFStdErrOut(KProcess *, char *data, int len)
{
QCString tmp(data,len+1); // adds a zero-byte
dfStringErrOut.append(tmp);
}
/***************************************************************************
* reads the df-commands results
**/
int KDiskFreeSp::readDF( const QString & mountPoint )
{
if (readingDFStdErrOut || dfProc->isRunning())
return -1;
m_mountPoint = mountPoint;
dfStringErrOut=""; // yet no data received
dfProc->clearArguments();
(*dfProc) << QString::fromLocal8Bit(DF_COMMAND) << QString::fromLocal8Bit(DF_ARGS);
if (!dfProc->start( KProcess::NotifyOnExit, KProcess::AllOutput ))
kdError() << "could not execute ["<< DF_COMMAND << "]" << endl;
return 1;
}
/***************************************************************************
* is called, when the df-command has finished
**/
void KDiskFreeSp::dfDone()
{
readingDFStdErrOut=true;
QTextStream t (dfStringErrOut, IO_ReadOnly);
QString s=t.readLine();
if ( (s.isEmpty()) || ( s.left(10) != QString::fromLatin1("Filesystem") ) )
kdError() << "Error running df command... got [" << s << "]" << endl;
while ( !t.eof() ) {
QString u,v;
s=t.readLine();
s=s.simplifyWhiteSpace();
if ( !s.isEmpty() ) {
//kdDebug(kfile_area) << "GOT: [" << s << "]" << endl;
if (s.find(BLANK)<0) // devicename was too long, rest in next line
if ( !t.eof() ) { // just appends the next line
v=t.readLine();
s=s.append(v);
s=s.simplifyWhiteSpace();
//kdDebug(kfile_area) << "SPECIAL GOT: [" << s << "]" << endl;
}//if silly linefeed
//kdDebug(kfile_area) << "[" << s << "]" << endl;
//QString deviceName = s.left(s.find(BLANK));
s=s.remove(0,s.find(BLANK)+1 );
//kdDebug(kfile_area) << " DeviceName: [" << deviceName << "]" << endl;
if (!NO_FS_TYPE)
s=s.remove(0,s.find(BLANK)+1 ); // eat fs type
u=s.left(s.find(BLANK));
unsigned long kBSize = u.toULong();
s=s.remove(0,s.find(BLANK)+1 );
//kdDebug(kfile_area) << " Size: [" << kBSize << "]" << endl;
u=s.left(s.find(BLANK));
unsigned long kBUsed = u.toULong();
s=s.remove(0,s.find(BLANK)+1 );
//kdDebug(kfile_area) << " Used: [" << kBUsed << "]" << endl;
u=s.left(s.find(BLANK));
unsigned long kBAvail = u.toULong();
s=s.remove(0,s.find(BLANK)+1 );
//kdDebug(kfile_area) << " Avail: [" << kBAvail << "]" << endl;
s=s.remove(0,s.find(BLANK)+1 ); // delete the capacity 94%
QString mountPoint = s.stripWhiteSpace();
//kdDebug(kfile_area) << " MountPoint: [" << mountPoint << "]" << endl;
if ( mountPoint == m_mountPoint )
{
//kdDebug(kfile_area) << "Found mount point. Emitting" << endl;
emit foundMountPoint( mountPoint, kBSize, kBUsed, kBAvail );
emit foundMountPoint( kBSize, kBUsed, kBAvail, mountPoint ); // sic!
}
}//if not header
}//while further lines available
readingDFStdErrOut=false;
emit done();
delete this;
}
KDiskFreeSp * KDiskFreeSp::findUsageInfo( const QString & path )
{
KDiskFreeSp * job = new KDiskFreeSp;
QString mountPoint = KIO::findPathMountPoint( path );
job->readDF( mountPoint );
return job;
}
KDiskFreeSp::~KDiskFreeSp
~KDiskFreeSp()
Destructor - this object autodeletes itself when it's done.
Definition: kdiskfreesp.cpp:63
KDiskFreeSp::findUsageInfo
static KDiskFreeSp * findUsageInfo(const QString &path)
Call this to fire a search on the disk usage information for the mount point containing path...
Definition: kdiskfreesp.cpp:163
KDiskFreeSp::readDF
int readDF(const QString &mountPoint)
Call this to fire a search on the disk usage information for mountPoint.
Definition: kdiskfreesp.cpp:80
KDiskFreeSp
This class parses the output of "df" to find the disk usage information for a given partition (mount ...
Definition: kdiskfreesp.h:40

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