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kpipeprocess.cpp
1 /*
2  * This file is part of the KDE libraries
3  * Copyright (c) 2001 Michael Goffioul <kdeprint@swing.be>
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Library General Public
7  * License version 2 as published by the Free Software Foundation.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public License
15  * along with this library; see the file COPYING.LIB. If not, write to
16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17  * Boston, MA 02110-1301, USA.
18  **/
19 
20 #include "kpipeprocess.h"
21 
22 KPipeProcess::KPipeProcess(const TQString& cmd, int mode)
23 : TQFile()
24 {
25  m_pipe = NULL;
26  if (!cmd.isEmpty())
27  open(cmd,mode);
28 }
29 
30 KPipeProcess::~KPipeProcess()
31 {
32  close();
33 }
34 
35 bool KPipeProcess::open(const TQString& cmd, int mode)
36 {
37  // close first if needed
38  close();
39  // check supported modes
40  if (mode != IO_ReadOnly && mode != IO_WriteOnly)
41  return false;
42 
43  // create the pipe
44  m_pipe = popen(cmd.latin1(),(mode == IO_WriteOnly ? "w" : "r"));
45  if (m_pipe)
46  if (!TQFile::open(mode,m_pipe))
47  close();
48  return (m_pipe != NULL);
49 }
50 
51 void KPipeProcess::close()
52 {
53  if (m_pipe != NULL)
54  {
55  TQFile::close();
56  /* pipe must be close to be sure the process is terminated */
57  pclose( m_pipe );
58  m_pipe = NULL;
59  }
60 }

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