File: qprocessinfo.cpp

package info (click to toggle)
renderdoc 1.2%2Bdfsg-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 79,584 kB
  • sloc: cpp: 491,671; ansic: 285,823; python: 12,617; java: 11,345; cs: 7,181; makefile: 6,703; yacc: 5,682; ruby: 4,648; perl: 3,461; php: 2,119; sh: 2,068; lisp: 1,835; tcl: 1,068; ml: 747; xml: 137
file content (395 lines) | stat: -rw-r--r-- 10,142 bytes parent folder | download | duplicates (6)
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
// Copyright (c) 2016, Baldur Karlsson
//
// Licensed under BSD 2-Clause License, see LICENSE file.
//
// Obtained from https://github.com/baldurk/qprocessinfo

#include "qprocessinfo.h"

#if defined(Q_OS_WIN32)

#include <windows.h>

#include <tlhelp32.h>

typedef DWORD(WINAPI *PFN_GETWINDOWTHREADPROCESSID)(HWND hWnd, LPDWORD lpdwProcessId);
typedef HWND(WINAPI *PFN_GETWINDOW)(HWND hWnd, UINT uCmd);
typedef BOOL(WINAPI *PFN_ISWINDOWVISIBLE)(HWND hWnd);
typedef int(WINAPI *PFN_GETWINDOWTEXTLENGTHW)(HWND hWnd);
typedef int(WINAPI *PFN_GETWINDOWTEXTW)(HWND hWnd, LPWSTR lpString, int nMaxCount);
typedef BOOL(WINAPI *PFN_ENUMWINDOWS)(WNDENUMPROC lpEnumFunc, LPARAM lParam);

namespace
{
struct callbackContext
{
  callbackContext(QProcessList &l) : list(l) {}
  QProcessList &list;

  PFN_GETWINDOWTHREADPROCESSID GetWindowThreadProcessId = NULL;
  PFN_GETWINDOW GetWindow = NULL;
  PFN_ISWINDOWVISIBLE IsWindowVisible = NULL;
  PFN_GETWINDOWTEXTLENGTHW GetWindowTextLengthW = NULL;
  PFN_GETWINDOWTEXTW GetWindowTextW = NULL;
  PFN_ENUMWINDOWS EnumWindows = NULL;
};
};

static BOOL CALLBACK fillWindowTitles(HWND hwnd, LPARAM lp)
{
  callbackContext *ctx = (callbackContext *)lp;

  DWORD pid = 0;
  ctx->GetWindowThreadProcessId(hwnd, &pid);

  HWND parent = ctx->GetWindow(hwnd, GW_OWNER);

  if(parent != 0)
    return TRUE;

  if(!ctx->IsWindowVisible(hwnd))
    return TRUE;

  for(QProcessInfo &info : ctx->list)
  {
    if(info.pid() == (uint32_t)pid)
    {
      int len = ctx->GetWindowTextLengthW(hwnd);
      wchar_t *buf = new wchar_t[len + 1];
      ctx->GetWindowTextW(hwnd, buf, len + 1);
      buf[len] = 0;
      info.setWindowTitle(QString::fromStdWString(std::wstring(buf)));
      delete[] buf;
      return TRUE;
    }
  }

  return TRUE;
}

QProcessList QProcessInfo::enumerate(bool includeWindowTitles)
{
  QProcessList ret;

  HANDLE h = NULL;
  PROCESSENTRY32 pe = {0};
  pe.dwSize = sizeof(PROCESSENTRY32);
  h = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
  if(Process32First(h, &pe))
  {
    do
    {
      QProcessInfo info;
      info.setPid((uint32_t)pe.th32ProcessID);
      info.setName(QString::fromStdWString(std::wstring(pe.szExeFile)));

      ret.push_back(info);
    } while(Process32Next(h, &pe));
  }
  CloseHandle(h);

  if(!includeWindowTitles)
    return ret;

  HMODULE user32 = LoadLibraryA("user32.dll");

  if(user32)
  {
    callbackContext ctx(ret);

    ctx.GetWindowThreadProcessId =
        (PFN_GETWINDOWTHREADPROCESSID)GetProcAddress(user32, "GetWindowThreadProcessId");
    ctx.GetWindow = (PFN_GETWINDOW)GetProcAddress(user32, "GetWindow");
    ctx.IsWindowVisible = (PFN_ISWINDOWVISIBLE)GetProcAddress(user32, "IsWindowVisible");
    ctx.GetWindowTextLengthW =
        (PFN_GETWINDOWTEXTLENGTHW)GetProcAddress(user32, "GetWindowTextLengthW");
    ctx.GetWindowTextW = (PFN_GETWINDOWTEXTW)GetProcAddress(user32, "GetWindowTextW");
    ctx.EnumWindows = (PFN_ENUMWINDOWS)GetProcAddress(user32, "EnumWindows");

    if(ctx.GetWindowThreadProcessId && ctx.GetWindow && ctx.IsWindowVisible &&
       ctx.GetWindowTextLengthW && ctx.GetWindowTextW && ctx.EnumWindows)
    {
      ctx.EnumWindows(fillWindowTitles, (LPARAM)&ctx);
    }

    FreeLibrary(user32);
  }

  return ret;
}

#elif defined(Q_OS_UNIX)

#include <QDir>
#include <QProcess>
#include <QRegExp>
#include <QStandardPaths>
#include <QTextStream>

QProcessList QProcessInfo::enumerate(bool includeWindowTitles)
{
  QProcessList ret;

  QDir proc(QStringLiteral("/proc"));

  QStringList files = proc.entryList();

  for(const QString &f : files)
  {
    bool ok = false;
    uint32_t pid = f.toUInt(&ok);

    if(ok)
    {
      QProcessInfo info;
      info.setPid(pid);

      QDir processDir(QStringLiteral("/proc/") + f);

      // default to the exe symlink if valid
      QFileInfo exe(processDir.absoluteFilePath(QStringLiteral("exe")));
      exe = QFileInfo(exe.symLinkTarget());
      info.setName(exe.completeBaseName());

      // if we didn't get a name from the symlink, check in the status file
      if(info.name().isEmpty())
      {
        QFile status(processDir.absoluteFilePath(QStringLiteral("status")));
        if(status.open(QIODevice::ReadOnly))
        {
          QByteArray contents = status.readAll();

          QTextStream in(&contents);
          while(!in.atEnd())
          {
            QString line = in.readLine();

            if(line.startsWith(QStringLiteral("Name:")))
            {
              line.remove(0, 5);
              // if we're using this name, surround with []s to indicate it's not a file
              info.setName(QStringLiteral("[%1]").arg(line.trimmed()));
              break;
            }
          }
          status.close();
        }
      }

      // get the command line
      QFile cmdline(processDir.absoluteFilePath(QStringLiteral("cmdline")));
      if(cmdline.open(QIODevice::ReadOnly))
      {
        QByteArray contents = cmdline.readAll();

        int nullIdx = contents.indexOf('\0');

        if(nullIdx > 0)
        {
          QString firstparam = QString::fromUtf8(contents.data(), nullIdx);

          // if name is a truncated form of a filename, replace it
          if(firstparam.endsWith(info.name()) && QFileInfo::exists(firstparam))
            info.setName(QFileInfo(firstparam).completeBaseName());

          // if we don't have a name, replace it but with []s
          if(info.name().isEmpty())
            info.setName(QStringLiteral("[%1]").arg(firstparam));

          contents.replace('\0', ' ');
        }

        info.setCommandLine(QString::fromUtf8(contents).trimmed());

        cmdline.close();
      }

      ret.push_back(info);
    }
  }

  if(includeWindowTitles)
  {
    // get a list of all windows. This is faster than searching with --pid
    // for every PID, and usually there will be fewer windows than PIDs.
    QStringList params;
    params << QStringLiteral("search") << QStringLiteral("--onlyvisible") << QStringLiteral(".*");

    QList<QByteArray> windowlist;

    QString inPath = QStandardPaths::findExecutable(QStringLiteral("xdotool"));

    if(inPath.isEmpty())
    {
      // add a fake window title to the first process to indicate that xdotool is missing
      if(!ret.isEmpty())
        ret[0].setWindowTitle(QStringLiteral("Window titles not available - install `xdotool`"));
    }
    else
    {
      QProcess process;
      process.start(QStringLiteral("xdotool"), params);
      process.waitForFinished(100);

      windowlist = process.readAll().split('\n');
    }

    // if xdotool isn't installed or failed to run, we'll have an empty
    // list or else entries that aren't numbers, so we'll skip them
    for(const QByteArray &win : windowlist)
    {
      // empty result, no window matches
      if(win.size() == 0)
        continue;

      bool isUInt = false;
      win.toUInt(&isUInt);

      // skip invalid lines (maybe because xdotool failed)
      if(!isUInt)
        continue;

      // get the PID of the window first. If one isn't available we won't
      // be able to match it up to our entries so don't proceed further
      params.clear();
      params << QStringLiteral("getwindowpid") << QString::fromLatin1(win);

      uint32_t pid = 0;

      {
        QProcess process;
        process.start(QStringLiteral("xdotool"), params);
        process.waitForFinished(100);

        pid = process.readAll().trimmed().toUInt(&isUInt);
      }

      // can't find a PID, skip this window
      if(!isUInt || pid == 0)
        continue;

      // check to see if the geometry is somewhere offscreen
      params.clear();
      params << QStringLiteral("getwindowgeometry") << QString::fromLatin1(win);

      QList<QByteArray> winGeometry;

      {
        QProcess process;
        process.start(QStringLiteral("xdotool"), params);
        process.waitForFinished(100);

        winGeometry = process.readAll().split('\n');
      }

      // should be three lines: Window <id> \n Position: ... \n Geometry: ...
      if(winGeometry.size() >= 3)
      {
        QRegExp pos(QStringLiteral("Position: (-?\\d+),(-?\\d+)"));
        QRegExp geometry(QStringLiteral("Geometry: (\\d+)x(\\d+)"));

        QString posString = QString::fromUtf8(winGeometry[1]);
        QString geometryString = QString::fromUtf8(winGeometry[2]);

        int x = 0, y = 0, w = 1000, h = 1000;

        if(pos.indexIn(posString) >= 0)
        {
          x = pos.cap(1).toInt();
          y = pos.cap(2).toInt();
        }

        if(geometry.indexIn(geometryString) >= 0)
        {
          w = geometry.cap(1).toInt();
          h = geometry.cap(2).toInt();
        }

        // some invisible windows are placed off screen, if we detect that skip it
        if(x + w < 0 && y + h < 0)
          continue;
      }

      // take the first window name
      {
        params.clear();
        params << QStringLiteral("getwindowname") << QString::fromLatin1(win);

        QProcess process;
        process.start(QStringLiteral("xdotool"), params);
        process.waitForFinished(100);

        QString windowTitle = QString::fromUtf8(process.readAll().split('\n')[0]);

        for(QProcessInfo &info : ret)
        {
          if(info.pid() == pid)
          {
            info.setWindowTitle(windowTitle);
            break;
          }
        }
      }
    }
  }

  return ret;
}

#else

QProcessList QProcessInfo::enumerate(bool includeWindowTitles)
{
  QProcessList ret;

  qWarning() << "Process enumeration not supported on this platform";

  return ret;
}

#endif

QProcessInfo::QProcessInfo()
{
  m_pid = 0;
}

uint32_t QProcessInfo::pid() const
{
  return m_pid;
}

void QProcessInfo::setPid(uint32_t pid)
{
  m_pid = pid;
}

const QString &QProcessInfo::name() const
{
  return m_name;
}

void QProcessInfo::setName(const QString &name)
{
  m_name = name;
}

const QString &QProcessInfo::windowTitle() const
{
  return m_title;
}

void QProcessInfo::setWindowTitle(const QString &title)
{
  m_title = title;
}

const QString &QProcessInfo::commandLine() const
{
  return m_cmdLine;
}

void QProcessInfo::setCommandLine(const QString &cmd)
{
  m_cmdLine = cmd;
}