summaryrefslogtreecommitdiffstats
path: root/src/qt3support/other/q3process_win.cpp
blob: 5eff8456cf9c1fd5f3ad756e560c9df6c0723a73 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3Support module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qplatformdefs.h"
#include "q3process.h"

#ifndef QT_NO_PROCESS

#include "qapplication.h"
#include "q3cstring.h"
#include "q3ptrqueue.h"
#include "qtimer.h"
#include "qregexp.h"
#include "private/q3membuf_p.h"
#include "qt_windows.h"

#ifdef Q_OS_WINCE
#define STARTF_USESTDHANDLES 1
#endif

QT_BEGIN_NAMESPACE

//#define QT_Q3PROCESS_DEBUG

/***********************************************************************
 *
 * Q3ProcessPrivate
 *
 **********************************************************************/
class Q3ProcessPrivate
{
public:
    Q3ProcessPrivate( Q3Process *proc )
    {
	stdinBufRead = 0;
	pipeStdin[0] = 0;
	pipeStdin[1] = 0;
	pipeStdout[0] = 0;
	pipeStdout[1] = 0;
	pipeStderr[0] = 0;
	pipeStderr[1] = 0;
	exitValuesCalculated = false;

	lookup = new QTimer( proc );
	qApp->connect( lookup, SIGNAL(timeout()),
		proc, SLOT(timeout()) );

	pid = 0;
    }

    ~Q3ProcessPrivate()
    {
	reset();
    }

    void reset()
    {
	while ( !stdinBuf.isEmpty() ) {
	    delete stdinBuf.dequeue();
	}
	closeHandles();
	stdinBufRead = 0;
	pipeStdin[0] = 0;
	pipeStdin[1] = 0;
	pipeStdout[0] = 0;
	pipeStdout[1] = 0;
	pipeStderr[0] = 0;
	pipeStderr[1] = 0;
	exitValuesCalculated = false;

	deletePid();
    }

    void closeHandles()
    {
	if( pipeStdin[1] != 0 ) {
	    CloseHandle( pipeStdin[1] );
	    pipeStdin[1] = 0;
	}
	if( pipeStdout[0] != 0 ) {
	    CloseHandle( pipeStdout[0] );
	    pipeStdout[0] = 0;
	}
	if( pipeStderr[0] != 0 ) {
	    CloseHandle( pipeStderr[0] );
	    pipeStderr[0] = 0;
	}
    }

    void deletePid()
    {
	if ( pid ) {
	    CloseHandle( pid->hProcess );
	    CloseHandle( pid->hThread );
	    delete pid;
	    pid = 0;
	}
    }

    void newPid()
    {
	deletePid();
	pid = new PROCESS_INFORMATION;
	memset( pid, 0, sizeof(PROCESS_INFORMATION) );
    }

    Q3Membuf bufStdout;
    Q3Membuf bufStderr;

    Q3PtrQueue<QByteArray> stdinBuf;

    HANDLE pipeStdin[2];
    HANDLE pipeStdout[2];
    HANDLE pipeStderr[2];
    QTimer *lookup;

    PROCESS_INFORMATION *pid;
    uint stdinBufRead;

    bool exitValuesCalculated;
};


/***********************************************************************
 *
 * Q3Process
 *
 **********************************************************************/
void Q3Process::init()
{
    d = new Q3ProcessPrivate( this );
    exitStat = 0;
    exitNormal = false;
}

void Q3Process::reset()
{
    d->reset();
    exitStat = 0;
    exitNormal = false;
    d->bufStdout.clear();
    d->bufStderr.clear();
}

Q3Membuf* Q3Process::membufStdout()
{
    if( d->pipeStdout[0] != 0 )
	socketRead( 1 );
    return &d->bufStdout;
}

Q3Membuf* Q3Process::membufStderr()
{
    if( d->pipeStderr[0] != 0 )
	socketRead( 2 );
    return &d->bufStderr;
}

Q3Process::~Q3Process()
{
    delete d;
}

bool Q3Process::start( QStringList *env )
{
#if defined(QT_Q3PROCESS_DEBUG)
    qDebug( "Q3Process::start()" );
#endif
    reset();

    if ( _arguments.isEmpty() )
	return false;

    // Open the pipes.  Make non-inheritable copies of input write and output
    // read handles to avoid non-closable handles (this is done by the
    // DuplicateHandle() call).
    SECURITY_ATTRIBUTES secAtt = { sizeof( SECURITY_ATTRIBUTES ), NULL, TRUE };
#ifndef Q_OS_WINCE
    // I guess there is no stdin stdout and stderr on Q_OS_WINCE to dup
    // CreatePipe and DupilcateHandle aren't available for Q_OS_WINCE
    HANDLE tmpStdin, tmpStdout, tmpStderr;
    if ( comms & Stdin ) {
	if ( !CreatePipe( &d->pipeStdin[0], &tmpStdin, &secAtt, 0 ) ) {
	    d->closeHandles();
	    return false;
	}
	if ( !DuplicateHandle( GetCurrentProcess(), tmpStdin, GetCurrentProcess(), &d->pipeStdin[1], 0, FALSE, DUPLICATE_SAME_ACCESS ) ) {
	    d->closeHandles();
	    return false;
	}
	if ( !CloseHandle( tmpStdin ) ) {
	    d->closeHandles();
	    return false;
	}
    }
    if ( comms & Stdout ) {
	if ( !CreatePipe( &tmpStdout, &d->pipeStdout[1], &secAtt, 0 ) ) {
	    d->closeHandles();
	    return false;
	}
	if ( !DuplicateHandle( GetCurrentProcess(), tmpStdout, GetCurrentProcess(), &d->pipeStdout[0], 0, FALSE, DUPLICATE_SAME_ACCESS ) ) {
	    d->closeHandles();
	    return false;
	}
	if ( !CloseHandle( tmpStdout ) ) {
	    d->closeHandles();
	    return false;
	}
    }
    if ( comms & Stderr ) {
	if ( !CreatePipe( &tmpStderr, &d->pipeStderr[1], &secAtt, 0 ) ) {
	    d->closeHandles();
	    return false;
	}
	if ( !DuplicateHandle( GetCurrentProcess(), tmpStderr, GetCurrentProcess(), &d->pipeStderr[0], 0, FALSE, DUPLICATE_SAME_ACCESS ) ) {
	    d->closeHandles();
	    return false;
	}
	if ( !CloseHandle( tmpStderr ) ) {
	    d->closeHandles();
	    return false;
	}
    }
    if ( comms & DupStderr ) {
	CloseHandle( d->pipeStderr[1] );
	d->pipeStderr[1] = d->pipeStdout[1];
    }
#endif

    // construct the arguments for CreateProcess()
    QString args;
    QString appName;
    QStringList::Iterator it = _arguments.begin();
    args = *it;
    ++it;
    if ( args.endsWith( QLatin1String(".bat") ) && args.contains( QLatin1Char(' ') ) ) {
	// CreateProcess() seems to have a strange semantics (see also
	// http://www.experts-exchange.com/Programming/Programming_Platforms/Win_Prog/Q_11138647.html):
	// If you start a batch file with spaces in the filename, the first
	// argument to CreateProcess() must be the name of the batchfile
	// without quotes, but the second argument must start with the same
	// argument with quotes included. But if the same approach is used for
	// .exe files, it doesn't work.
	appName = args;
	args = QLatin1Char('"') + args + QLatin1Char('"');
    }
    for ( ; it != _arguments.end(); ++it ) {
	QString tmp = *it;
	// escape a single " because the arguments will be parsed
	tmp.replace( QLatin1Char('\"'), QLatin1String("\\\"") );
	if ( tmp.isEmpty() || tmp.contains( QLatin1Char(' ') ) || tmp.contains( QLatin1Char('\t') ) ) {
	    // The argument must not end with a \ since this would be interpreted
	    // as escaping the quote -- rather put the \ behind the quote: e.g.
	    // rather use "foo"\ than "foo\"
	    QString endQuote( QLatin1String("\"") );
	    int i = tmp.length();
	    while ( i>0 && tmp.at( i-1 ) == QLatin1Char('\\') ) {
		--i;
		endQuote += QLatin1Char('\\');
	    }
        args += QLatin1String(" \"") + tmp.left( i ) + endQuote;
	} else {
	    args += QLatin1Char(' ') + tmp;
	}
    }
#if defined(QT_Q3PROCESS_DEBUG)
    qDebug( "Q3Process::start(): args [%s]", args.latin1() );
#endif

    // CreateProcess()
    bool success;
    d->newPid();

    STARTUPINFOW startupInfo = {
        sizeof( STARTUPINFO ), 0, 0, 0,
        (ulong)CW_USEDEFAULT, (ulong)CW_USEDEFAULT, (ulong)CW_USEDEFAULT, (ulong)CW_USEDEFAULT,
        0, 0, 0,
        STARTF_USESTDHANDLES,
        0, 0, 0,
        d->pipeStdin[0], d->pipeStdout[1], d->pipeStderr[1]
    };
    wchar_t *applicationName;
    if ( appName.isNull() )
        applicationName = 0;
    else
        applicationName = _wcsdup( (wchar_t*)appName.utf16() );
    wchar_t *commandLine = _wcsdup( (wchar_t*)args.utf16() );
    QByteArray envlist;
    if ( env != 0 ) {
        int pos = 0;
        // add PATH if necessary (for DLL loading)
        QByteArray path = qgetenv( "PATH" );
        if ( env->grep( QRegExp(QLatin1String("^PATH="),FALSE) ).empty() && !path.isNull() ) {
            QString tmp = QString::fromLatin1("PATH=%1").arg(QLatin1String(path.constData()));
            uint tmpSize = sizeof(wchar_t) * (tmp.length() + 1);
            envlist.resize( envlist.size() + tmpSize );
            memcpy( envlist.data() + pos, tmp.utf16(), tmpSize );
            pos += tmpSize;
        }
        // add the user environment
        for ( QStringList::Iterator it = env->begin(); it != env->end(); it++ ) {
            QString tmp = *it;
            uint tmpSize = sizeof(wchar_t) * (tmp.length() + 1);
            envlist.resize( envlist.size() + tmpSize );
            memcpy( envlist.data() + pos, tmp.utf16(), tmpSize );
            pos += tmpSize;
        }
        // add the 2 terminating 0 (actually 4, just to be on the safe side)
        envlist.resize( envlist.size()+4 );
        envlist[pos++] = 0;
        envlist[pos++] = 0;
        envlist[pos++] = 0;
        envlist[pos++] = 0;
    }
    success = CreateProcess( applicationName, commandLine,
                            0, 0, TRUE, ( comms == 0 ? CREATE_NEW_CONSOLE : CREATE_NO_WINDOW )
#ifndef Q_OS_WINCE
                            | CREATE_UNICODE_ENVIRONMENT
#endif
                            , env == 0 ? 0 : envlist.data(),
                            (wchar_t*)QDir::toNativeSeparators(workingDir.absPath()).utf16(),
                            &startupInfo, d->pid );

    free( applicationName );
    free( commandLine );

    if  ( !success ) {
	d->deletePid();
	return false;
    }

#ifndef Q_OS_WINCE
    if ( comms & Stdin )
	CloseHandle( d->pipeStdin[0] );
    if ( comms & Stdout )
        CloseHandle( d->pipeStdout[1] );
    if ( (comms & Stderr) && !(comms & DupStderr) )
	CloseHandle( d->pipeStderr[1] );
#endif

    if ( ioRedirection || notifyOnExit ) {
	d->lookup->start( 100 );
    }

    // cleanup and return
    return true;
}

static BOOL QT_WIN_CALLBACK qt_terminateApp( HWND hwnd, LPARAM procId )
{
    DWORD procId_win;
    GetWindowThreadProcessId( hwnd, &procId_win );
    if( procId_win == (DWORD)procId )
	PostMessage( hwnd, WM_CLOSE, 0, 0 );

    return TRUE;
}

void Q3Process::tryTerminate() const
{
    if ( d->pid )
	EnumWindows( qt_terminateApp, (LPARAM)d->pid->dwProcessId );
}

void Q3Process::kill() const
{
    if ( d->pid )
	TerminateProcess( d->pid->hProcess, 0xf291 );
}

bool Q3Process::isRunning() const
{
    if ( !d->pid )
	return false;

    if ( WaitForSingleObject( d->pid->hProcess, 0) == WAIT_OBJECT_0 ) {
	// there might be data to read
	Q3Process *that = (Q3Process*)this;
	that->socketRead( 1 ); // try stdout
	that->socketRead( 2 ); // try stderr
	// compute the exit values
	if ( !d->exitValuesCalculated ) {
	    DWORD exitCode;
	    if ( GetExitCodeProcess( d->pid->hProcess, &exitCode ) ) {
		if ( exitCode != STILL_ACTIVE ) { // this should ever be true?
		    that->exitNormal = exitCode != 0xf291;
		    that->exitStat = exitCode;
		}
	    }
	    d->exitValuesCalculated = true;
	}
	d->deletePid();
	d->closeHandles();
	return false;
    } else {
        return true;
    }
}

bool Q3Process::canReadLineStdout() const
{
    if( !d->pipeStdout[0] )
	return d->bufStdout.size() != 0;

    Q3Process *that = (Q3Process*)this;
    return that->membufStdout()->scanNewline( 0 );
}

bool Q3Process::canReadLineStderr() const
{
    if( !d->pipeStderr[0] )
	return d->bufStderr.size() != 0;

    Q3Process *that = (Q3Process*)this;
    return that->membufStderr()->scanNewline( 0 );
}

void Q3Process::writeToStdin( const QByteArray& buf )
{
    d->stdinBuf.enqueue( new QByteArray(buf) );
    socketWrite( 0 );
}

void Q3Process::closeStdin( )
{
    if ( d->pipeStdin[1] != 0 ) {
	CloseHandle( d->pipeStdin[1] );
	d->pipeStdin[1] = 0;
    }
}

void Q3Process::socketRead( int fd )
{
    // fd == 1: stdout, fd == 2: stderr
    HANDLE dev;
    if ( fd == 1 ) {
	dev = d->pipeStdout[0];
    } else if ( fd == 2 ) {
	dev = d->pipeStderr[0];
    } else {
	return;
    }
#ifndef Q_OS_WINCE
    // get the number of bytes that are waiting to be read
    unsigned long i, r;
    char dummy;
    if ( !PeekNamedPipe( dev, &dummy, 1, &r, &i, 0 ) ) {
	return; // ### is it worth to dig for the reason of the error?
    }
#else
    unsigned long i = 1000;
#endif
    if ( i > 0 ) {
	Q3Membuf *buffer;
	if ( fd == 1 )
	    buffer = &d->bufStdout;
	else
	    buffer = &d->bufStderr;

	QByteArray *ba = new QByteArray( i );
	uint sz = readStddev( dev, ba->data(), i );
	if ( sz != i )
	    ba->resize( i );

	if ( sz == 0 ) {
	    delete ba;
	    return;
	}
	buffer->append( ba );
	if ( fd == 1 )
	    emit readyReadStdout();
	else
	    emit readyReadStderr();
    }
}

void Q3Process::socketWrite( int )
{
    DWORD written;
    while ( !d->stdinBuf.isEmpty() && isRunning() ) {
	if ( !WriteFile( d->pipeStdin[1],
		    d->stdinBuf.head()->data() + d->stdinBufRead,
		    qMin( 8192, int(d->stdinBuf.head()->size() - d->stdinBufRead) ),
		    &written, 0 ) ) {
	    d->lookup->start( 100 );
	    return;
	}
	d->stdinBufRead += written;
	if ( d->stdinBufRead == (DWORD)d->stdinBuf.head()->size() ) {
	    d->stdinBufRead = 0;
	    delete d->stdinBuf.dequeue();
	    if ( wroteToStdinConnected && d->stdinBuf.isEmpty() )
		emit wroteToStdin();
	}
    }
}

void Q3Process::flushStdin()
{
    socketWrite( 0 );
}

/*
  Use a timer for polling misc. stuff.
*/
void Q3Process::timeout()
{
    // Disable the timer temporary since one of the slots that are connected to
    // the readyRead...(), etc. signals might trigger recursion if
    // processEvents() is called.
    d->lookup->stop();

    // try to write pending data to stdin
    if ( !d->stdinBuf.isEmpty() )
	socketWrite( 0 );

    if ( ioRedirection ) {
	socketRead( 1 ); // try stdout
	socketRead( 2 ); // try stderr
    }

    if ( isRunning() ) {
	// enable timer again, if needed
	if ( !d->stdinBuf.isEmpty() || ioRedirection || notifyOnExit )
	    d->lookup->start( 100 );
    } else if ( notifyOnExit ) {
	emit processExited();
    }
}

/*
  read on the pipe
*/
uint Q3Process::readStddev( HANDLE dev, char *buf, uint bytes )
{
    if ( bytes > 0 ) {
	ulong r;
	if ( ReadFile( dev, buf, bytes, &r, 0 ) )
	    return r;
    }
    return 0;
}

/*
  Used by connectNotify() and disconnectNotify() to change the value of
  ioRedirection (and related behaviour)
*/
void Q3Process::setIoRedirection( bool value )
{
    ioRedirection = value;
    if ( !ioRedirection && !notifyOnExit )
	d->lookup->stop();
    if ( ioRedirection ) {
	if ( isRunning() )
	    d->lookup->start( 100 );
    }
}

/*
  Used by connectNotify() and disconnectNotify() to change the value of
  notifyOnExit (and related behaviour)
*/
void Q3Process::setNotifyOnExit( bool value )
{
    notifyOnExit = value;
    if ( !ioRedirection && !notifyOnExit )
	d->lookup->stop();
    if ( notifyOnExit ) {
	if ( isRunning() )
	    d->lookup->start( 100 );
    }
}

/*
  Used by connectNotify() and disconnectNotify() to change the value of
  wroteToStdinConnected (and related behaviour)
*/
void Q3Process::setWroteStdinConnected( bool value )
{
    wroteToStdinConnected = value;
}

Q3Process::PID Q3Process::processIdentifier()
{
    return d->pid;
}

QT_END_NAMESPACE

#endif // QT_NO_PROCESS