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
|
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "procutils.h"
#include <cstdio>
#include <dirent.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/resource.h>
#include <signal.h>
#include <errno.h>
#include <QFile>
#include <QDir>
#include <QFileInfo>
#include <QLocalSocket>
#include <QDebug>
#if defined(Q_OS_LINUX)
#include <QRegExp>
#elif defined(Q_OS_MAC)
#include <sys/sysctl.h>
#endif
QT_BEGIN_NAMESPACE_PROCESSMANAGER
struct ProcessPrivateData {
pid_t pid, ppid, pgrp, sid;
uid_t uid, euid, suid;
gid_t gid, egid, sgid;
int priority, nice;
};
/*!
Construct a ExecutingProcessInfo object from \a pid.
*/
ExecutingProcessInfo::ExecutingProcessInfo(pid_t pid)
: m_data(0)
{
#if defined(Q_OS_LINUX)
static QRegExp statFile(QStringLiteral("^(\\d+) \\(.*\\) [RSDZTW] (\\d+) (\\d+) (\\d+)(?: \\d+){11} (\\d+) (\\d+)"));
/*
Index, name, format, description (from man 5 page for proc)
0 pid %d The process ID.
1 name (%s) The process name, surrounded by parenthesis
2 state %c One of R (running), S (sleeping), D (disk sleep), ...
3 ppid %d The PID of the parent.
4 pgrp %d The process group ID of the process.
5 session %d The session ID of the process.
17 priority %ld For processes running under a non-real-time scheduling policy, this is
the raw nice value (setpriority(2)) as represented in the kernel.
The kernel stores nice values as numbers in the range 0 (high) to 39 (low),
corresponding to the user- visible nice range of -20 to 19.
18 nice %ld The nice value (see setpriority(2)), a value in the range
19 (low priority) to -20 (high priority).
*/
QFile file(QString::fromLatin1("/proc/%1/stat").arg(pid));
if (!file.open(QIODevice::ReadOnly))
return;
m_data = new ProcessPrivateData;
memset(m_data, 0, sizeof(ProcessPrivateData));
QByteArray contents = file.readAll();
file.close();
if (statFile.indexIn(QString::fromLocal8Bit(contents)) != 0) {
qWarning("Did not match pid=%d", pid);
return;
}
m_data->pid = statFile.cap(1).toInt();
m_data->ppid = statFile.cap(2).toInt();
m_data->pgrp = statFile.cap(3).toInt();
m_data->sid = statFile.cap(4).toInt();
m_data->priority = statFile.cap(5).toLong();
m_data->nice = statFile.cap(6).toLong();
/* Some of the contents (from kernel documentation proc.txt)
Field Content
Name filename of the executable
Pid process id
PPid process id of the parent process
Uid Real, effective, saved set, and file system UIDs
Gid Real, effective, saved set, and file system GIDs
Groups supplementary group list
...
*/
QFile status(QString::fromLatin1("/proc/%1/status").arg(pid));
if (!status.open(QIODevice::ReadOnly)) {
qWarning("Unable to open status file for pid=%d", pid);
return;
}
char buf[256];
qint64 len;
while ((len = status.readLine(buf, 256)) != -1) {
if (!strncmp("Name:", buf, 5))
m_name = QString::fromLocal8Bit(buf + 6, len-6);
else if (!strncmp("Uid:", buf, 4)) {
QList<QByteArray> uids = QByteArray(buf + 5, len-5).split('\t');
m_data->uid = uids.at(0).toInt();
m_data->euid = uids.at(1).toInt();
m_data->suid = uids.at(2).toInt();
}
else if (!strncmp("Gid:", buf, 4)) {
QList<QByteArray> gids = QByteArray(buf + 5, len-5).split('\t');
m_data->gid = gids.at(0).toInt();
m_data->egid = gids.at(1).toInt();
m_data->sgid = gids.at(2).toInt();
}
else if (!strncmp("Groups:", buf, 7)) {
QList<QByteArray> groups = QByteArray(buf+8, len-8).split(' ');
while (groups.size()) {
bool ok;
gid_t group = groups.takeFirst().toInt(&ok);
if (ok)
m_groups.append(group);
}
}
}
status.close();
#elif defined(Q_OS_MAC)
int name[4];
size_t bufferSize;
name[0] = CTL_KERN;
name[1] = KERN_PROC;
name[2] = KERN_PROC_PID;
name[3] = pid;
if (::sysctl(name, 4, NULL, &bufferSize, NULL, 0) < 0)
return;
struct kinfo_proc *kinfo = (struct kinfo_proc *) malloc(bufferSize);
if (!kinfo)
return;
if (::sysctl(name, 4, kinfo, &bufferSize, NULL, 0) < 0) {
free(kinfo);
return;
}
int n = bufferSize / sizeof(struct kinfo_proc);
if (n != 1) {
free(kinfo);
return;
}
m_data = new ProcessPrivateData;
memset(m_data, 0, sizeof(ProcessPrivateData));
// Proc data
m_data->pid = kinfo->kp_proc.p_pid;
m_data->priority = kinfo->kp_proc.p_priority; // Process priority (u_char)
m_data->nice = kinfo->kp_proc.p_nice; // Process 'nice' value (char)
// Effective proc data
m_data->ppid = kinfo->kp_eproc.e_ppid; // Parent process id
m_data->pgrp = kinfo->kp_eproc.e_pgid; // Process group id
m_data->uid = kinfo->kp_eproc.e_pcred.p_ruid; // Real user ID
m_data->suid = kinfo->kp_eproc.e_pcred.p_svuid; // Saved user ID
m_data->gid = kinfo->kp_eproc.e_pcred.p_rgid; // Real group ID
m_data->sgid = kinfo->kp_eproc.e_pcred.p_svgid; // Saved group ID
// Credentials
m_data->euid = kinfo->kp_eproc.e_ucred.cr_uid; // Effective user ID
for (int i = 0 ; i < kinfo->kp_eproc.e_ucred.cr_ngroups ; i++)
m_groups.append(kinfo->kp_eproc.e_ucred.cr_groups[i]);
m_data->egid = m_groups.at(0); // I believe this is correct
free(kinfo);
// Session
m_data->sid = ::getsid(m_data->pid);
// Name requires two additional sysctl calls
name[0] = CTL_KERN;
name[1] = KERN_ARGMAX;
int maxArgs;
bufferSize = sizeof(maxArgs);
if (::sysctl(name, 2, &maxArgs, &bufferSize, NULL, 0) == -1)
return;
char *args = (char *) malloc(maxArgs);
if (!args)
return;
name[0] = CTL_KERN;
name[1] = KERN_PROCARGS2;
name[2] = pid;
bufferSize = (size_t) maxArgs;
if (::sysctl(name, 3, args, &bufferSize, NULL, 0) == -1) {
free(args);
return;
}
char *p = args + sizeof(int); // First few bytes are the number of arguments
char *p2 = strrchr(p, '/');
if (p2)
m_name = QString::fromLocal8Bit(p2+1);
else
m_name = QString::fromLocal8Bit(p);
free(args);
#endif
}
bool ExecutingProcessInfo::exists() const { return (m_data != 0); }
pid_t ExecutingProcessInfo::pid() const { return (m_data ? m_data->pid : 0); }
pid_t ExecutingProcessInfo::ppid() const { return (m_data ? m_data->ppid : 0); }
pid_t ExecutingProcessInfo::pgrp() const { return (m_data ? m_data->pgrp : 0); }
pid_t ExecutingProcessInfo::sid() const { return (m_data ? m_data->sid : 0); }
uid_t ExecutingProcessInfo::uid() const { return (m_data ? m_data->uid : 0); }
uid_t ExecutingProcessInfo::euid() const { return (m_data ? m_data->euid : 0); }
uid_t ExecutingProcessInfo::suid() const { return (m_data ? m_data->suid : 0); }
gid_t ExecutingProcessInfo::gid() const { return (m_data ? m_data->gid : 0); }
gid_t ExecutingProcessInfo::egid() const { return (m_data ? m_data->egid : 0); }
gid_t ExecutingProcessInfo::sgid() const { return (m_data ? m_data->sgid : 0); }
int ExecutingProcessInfo::priority() const { return (m_data ? m_data->priority : 0); }
int ExecutingProcessInfo::nice() const { return (m_data ? m_data->nice : 0); }
ProcUtils::ProcUtils()
{
}
/*!
Note: Under MacOSX, we need to use sysctl with CTL_KERN, KERN_PROC, KERN_PROCARGS2, pid
which returns a buffer containing the process name, all arguments, all environment variables
and sometimes other stuff.
*/
QString ProcUtils::execNameForPid(qint64 pid)
{
#if defined(Q_OS_LINUX)
enum { BUFFERSIZE = 1024 };
char buf[BUFFERSIZE];
QString fn = QLatin1String("/proc/") + QString::number(pid) + QLatin1String("/exe");
ssize_t len = readlink(fn.toLatin1(), buf, sizeof(buf) - 1);
if (len != -1) {
buf[len] = '\0';
return QString::fromLocal8Bit(buf);
}
#else
Q_UNUSED(pid);
#endif
return QString();
}
qint64 ProcUtils::ppidForPid(pid_t pid)
{
int ppid = 0;
#if defined(Q_OS_LINUX)
QFile statFile(QLatin1String("/proc/") + QString::number(pid) + QStringLiteral("/stat"));
statFile.open(QIODevice::ReadOnly);
QByteArray contents = statFile.readAll();
statFile.close();
// 954 (ofono-jdb-daemo) S 1
int readPid = 0;
char strDummy[64];
char state;
sscanf(contents.constData(), "%d %s %c %d %s", &readPid, strDummy, &state, &ppid, strDummy);
#else
Q_UNUSED(pid);
#endif
return ppid;
}
qint64 ProcUtils::pidForFilename(const QString &filename)
{
#if defined(Q_OS_LINUX)
QFile file(filename);
if (!file.exists())
return 0;
QFileInfo fileInfo(file);
DIR *d = opendir(QLatin1String("/proc").latin1());
if (!d) {
qWarning() << "failed to open proc";
return 0;
}
while (dirent *dirent = readdir(d)) {
QString dirname = QString::fromLatin1(dirent->d_name);
bool ok = false;
qint64 pid = dirname.toLongLong(&ok, 10);
if (ok) {
const QString execFilename = execNameForPid(pid);
if (execFilename == fileInfo.fileName())
return pid;
}
}
closedir(d);
#else
Q_UNUSED(filename);
#endif
return 0;
}
qint64 ProcUtils::pidForLocalSocket(const QLocalSocket *socket)
{
#if defined(Q_OS_LINUX)
if (socket) {
struct ucred cr;
socklen_t len = sizeof(struct ucred);
int r = ::getsockopt(socket->socketDescriptor(), SOL_SOCKET, SO_PEERCRED, &cr, &len);
if (r == 0)
return (qint64)cr.pid;
}
#else
Q_UNUSED(socket);
#endif
return 0;
}
QByteArray ProcUtils::cmdlineForPid(qint64 pid)
{
QByteArray cmdline;
#if defined(Q_OS_LINUX)
if (pid) {
QFile file(QLatin1String("/proc/") + QString::number(pid) + QLatin1String("/cmdline"));
file.open(QIODevice::ReadOnly);
cmdline = file.readAll();
}
#else
Q_UNUSED(pid);
#endif
return cmdline;
}
qint32 ProcUtils::oomAdjustment(pid_t pid, bool *ok)
{
if (ok)
*ok = false;
#if defined(Q_OS_LINUX)
QFile file(QString::fromLatin1("/proc/%1/oom_score_adj").arg(pid));
if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
QByteArray ba = file.read(100);
ba.truncate(ba.count() - 1); // Drop the '\n' at the end
if (ba.count())
return ba.toInt(ok);
}
#else
Q_UNUSED(pid);
#endif
return -1001;
}
bool ProcUtils::setOomAdjustment(pid_t pid, qint32 oomAdjustment)
{
#if defined(Q_OS_LINUX)
QFile file(QString::fromLatin1("/proc/%1/oom_score_adj").arg(pid));
if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
return false;
QByteArray value = QByteArray::number(oomAdjustment) + '\n';
if (file.write(value) == value.count())
return true;
#else
Q_UNUSED(pid);
Q_UNUSED(oomAdjustment);
#endif
return false;
}
/*!
Send a signal to a process or process group.
*/
void ProcUtils::sendSignalToProcess(pid_t pid, int sig)
{
pid_t pgrp = ::getpgid(pid);
if (pgrp != -1 && pgrp != ::getpgrp() && ::killpg(pgrp, sig) == 0)
return;
qWarning("Unable terminate process group: %d, directly killing process %d", pgrp, pid);
::kill(pid, sig);
}
/*!
Set a process or process group priority
*/
void ProcUtils::setPriority(pid_t pid, qint32 priority)
{
pid_t pgrp = ::getpgid(pid);
if (pgrp != -1 && pgrp != ::getpgrp()) {
if (::setpriority(PRIO_PGRP, pgrp, priority) == 0)
return;
qErrnoWarning(errno, "Failed to set process group %d priority to %d", pgrp, priority);
}
if (::setpriority(PRIO_PROCESS, pid, priority))
qErrnoWarning(errno, "Failed to set process %d priority to %d", pid, priority);
}
/*!
Return a count of the number of threads in a process
*/
int ProcUtils::getThreadCount(pid_t pid)
{
#if defined(Q_OS_LINUX)
QDir pdir(QString::fromLatin1("/proc/%1/task").arg(pid));
return pdir.entryList(QDir::Dirs | QDir::NoDotAndDotDot).size();
#endif
return 1;
}
/*!
Return a list of priorities, one per thread in the process. This function
returns the "user visible" priority, a number from -20 to +19.
*/
QList<qint32> ProcUtils::getThreadPriorities(pid_t pid)
{
QList<qint32> plist;
#if defined(Q_OS_LINUX)
static QRegExp statFile(QStringLiteral("^(\\d+) \\(.*\\) [RSDZTW] (\\d+) (\\d+) (\\d+)(?: \\d+){11} (\\d+) (\\d+)"));
QDir pdir(QString::fromLatin1("/proc/%1/task").arg(pid));
foreach (const QString& entry, pdir.entryList(QDir::Dirs | QDir::NoDotAndDotDot)) {
QFile file(QString::fromLatin1("%1/%2/stat").arg(pdir.path()).arg(entry));
if (!file.open(QIODevice::ReadOnly)) {
qWarning() << "Unable to read thread stat" << file.fileName();
return plist;
}
QByteArray contents = file.readAll();
if (statFile.indexIn(QString::fromLocal8Bit(contents)) != 0) {
qWarning("Did not match stat file expression");
return plist;
}
plist << statFile.cap(6).toLong();
}
#endif
return plist;
}
#include "moc_procutils.cpp"
QT_END_NAMESPACE_PROCESSMANAGER
|