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/**************************************************************************
**
** This code is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** 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:
** https://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.
**
** 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at info@qt.nokia.com.
**
**************************************************************************/
#include "processlist.h"
#include <launcher/core/probeabidetector.h>
#include <QProcess>
#include <QtConcurrent/QtConcurrentMap>
#include <QDir>
#include <algorithm>
static GammaRay::ProbeABIDetector s_abiDetector;
static bool isUnixProcessId(const QString &procname)
{
for (int i = 0; i != procname.size(); ++i) {
if (!procname.at(i).isDigit())
return false;
}
return true;
}
struct PidAndNameMatch
{
explicit PidAndNameMatch(const QString &ppid, const QString &name)
: m_ppid(ppid)
, m_name(name)
{
}
bool operator()(const ProcData &p) const
{
return p.ppid == m_ppid && m_name == p.name;
}
const QString m_ppid;
const QString m_name;
};
// Determine UNIX processes by running ps
static ProcDataList unixProcessListPS(const ProcDataList &previous)
{
#ifdef Q_OS_MAC
// command goes last, otherwise it is cut off
static const char formatC[] = "pid state user command";
#else
static const char formatC[] = "pid,state,user,cmd";
#endif
ProcDataList rc;
QProcess psProcess;
QStringList args;
args << QStringLiteral("-e") << QStringLiteral("-o") << QLatin1String(formatC);
psProcess.start(QStringLiteral("ps"), args);
if (!psProcess.waitForStarted())
return rc;
psProcess.waitForFinished();
QByteArray output = psProcess.readAllStandardOutput();
// Split "457 S+ /Users/foo.app"
const QStringList lines = QString::fromLocal8Bit(output).split(QLatin1Char('\n'));
const int lineCount = ( int )lines.size();
const QChar blank = QLatin1Char(' ');
for (int l = 1; l < lineCount; l++) { // Skip header
const QString line = lines.at(l).simplified();
// we can't just split on blank as the process name might
// contain them
const auto endOfPid = line.indexOf(blank);
const auto endOfState = line.indexOf(blank, endOfPid + 1);
const auto endOfUser = line.indexOf(blank, endOfState + 1);
if (endOfPid >= 0 && endOfState >= 0 && endOfUser >= 0) {
ProcData procData;
procData.ppid = line.left(endOfPid);
procData.state = line.mid(endOfPid + 1, endOfState - endOfPid - 1);
procData.user = line.mid(endOfState + 1, endOfUser - endOfState - 1);
procData.name = line.right(line.size() - endOfUser - 1);
PidAndNameMatch f(procData.ppid, procData.name);
ProcDataList::ConstIterator it = std::find_if(previous.constBegin(), previous.constEnd(), std::move(f));
if (it != previous.constEnd())
procData.abi = it->abi;
else
procData.abi = s_abiDetector.abiForProcess(procData.ppid.toLongLong());
rc.push_back(procData);
}
}
return rc;
}
struct ProcIdToProcData
{
ProcIdToProcData(const ProcDataList &prev)
: previous(prev)
{
}
typedef ProcData result_type;
ProcData operator()(const QString &procId) const
{
ProcData proc;
if (!isUnixProcessId(procId))
return proc;
const QString filename = QLatin1String("/proc/") + procId + QLatin1String("/stat");
QFile file(filename);
if (!file.open(QIODevice::ReadOnly))
return proc; // process may have exited
const QStringList data = QString::fromLocal8Bit(file.readAll()).split(' ');
proc.ppid = procId;
proc.name = data.at(1);
if (proc.name.startsWith(QLatin1Char('(')) && proc.name.endsWith(QLatin1Char(')'))) {
proc.name.truncate(proc.name.size() - 1);
proc.name.remove(0, 1);
}
proc.state = data.at(2);
// PPID is element 3
proc.user = QFileInfo(file).owner();
file.close();
QFile cmdFile(QLatin1String("/proc/") + procId + QLatin1String("/cmdline"));
if (cmdFile.open(QFile::ReadOnly)) {
QByteArray cmd = cmdFile.readAll();
cmd.replace('\0', ' ');
if (!cmd.isEmpty())
proc.name = QString::fromLocal8Bit(cmd).trimmed();
}
cmdFile.close();
ProcDataList::ConstIterator it = std::find_if(previous.constBegin(), previous.constEnd(),
PidAndNameMatch(proc.ppid, proc.name));
if (it != previous.constEnd())
proc.abi = it->abi;
else
proc.abi = s_abiDetector.abiForProcess(proc.ppid.toLongLong());
return proc;
}
private:
const ProcDataList &previous;
};
// Determine UNIX processes by reading "/proc". Default to ps if
// it does not exist
ProcDataList processList(const ProcDataList &previous)
{
const QDir procDir(QStringLiteral("/proc/"));
if (!procDir.exists())
return unixProcessListPS(previous);
ProcDataList rc;
const QStringList procIds = procDir.entryList();
if (procIds.isEmpty())
return rc;
ProcIdToProcData procIdToProcData(previous);
// start collection
rc = QtConcurrent::blockingMapped<ProcDataList>(procIds, procIdToProcData);
// Filter out invalid entries
rc.erase(std::remove_if(rc.begin(), rc.end(), [](const ProcData &pd) {
return pd.ppid.isEmpty();
}),
rc.end());
return rc;
}
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