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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "processinfo.h"
#include "algorithm.h"
#include "qtcprocess.h"
#include <QDir>
#include <QRegularExpression>
#if defined(Q_OS_UNIX)
#elif defined(Q_OS_WIN)
#include "winutils.h"
#ifdef QTCREATOR_PCH_H
#define CALLBACK WINAPI
#endif
#include <windows.h>
#include <tlhelp32.h>
#include <psapi.h>
#endif
namespace Utils {
bool ProcessInfo::operator<(const ProcessInfo &other) const
{
if (processId != other.processId)
return processId < other.processId;
if (executable != other.executable)
return executable < other.executable;
return commandLine < other.commandLine;
}
// Determine UNIX processes by reading "/proc". Default to ps if
// it does not exist
static QList<ProcessInfo> getLocalProcessesUsingProc(const FilePath &procDir)
{
static const QString execs = "-exec test -f {}/exe \\; "
"-exec test -f {}/cmdline \\; "
"-exec echo -en 'p{}\\ne' \\; "
"-exec readlink {}/exe \\; "
"-exec echo -n c \\; "
"-exec head -n 1 {}/cmdline \\; "
"-exec echo \\; "
"-exec echo __SKIP_ME__ \\;";
CommandLine cmd{procDir.withNewPath("find"),
{procDir.nativePath(), "-maxdepth", "1", "-type", "d", "-name", "[0-9]*"}};
cmd.addArgs(execs, CommandLine::Raw);
Process procProcess;
procProcess.setCommand(cmd);
procProcess.runBlocking();
QList<ProcessInfo> processes;
const auto lines = procProcess.readAllStandardOutput().split('\n');
for (auto it = lines.begin(); it != lines.end(); ++it) {
if (it->startsWith('p')) {
ProcessInfo proc;
bool ok;
proc.processId = FilePath::fromUserInput(it->mid(1).trimmed()).fileName().toInt(&ok);
QTC_ASSERT(ok, continue);
++it;
QTC_ASSERT(it->startsWith('e'), continue);
proc.executable = it->mid(1).trimmed();
++it;
QTC_ASSERT(it->startsWith('c'), continue);
proc.commandLine = it->mid(1).trimmed().replace('\0', ' ');
if (!proc.commandLine.contains("__SKIP_ME__"))
processes.append(proc);
}
}
return processes;
}
// Determine UNIX processes by running ps
static QMap<qint64, QString> getLocalProcessDataUsingPs(const FilePath &deviceRoot,
const QString &column)
{
Process process;
process.setCommand({deviceRoot.withNewPath("ps"), {"-e", "-o", "pid," + column}});
process.runBlocking();
// Split "457 /Users/foo.app arg1 arg2"
const QStringList lines = process.readAllStandardOutput().split(QLatin1Char('\n'));
QMap<qint64, QString> result;
for (int i = 1; i < lines.size(); ++i) { // Skip header
const QString line = lines.at(i).trimmed();
const int pidSep = line.indexOf(QChar::Space);
const qint64 pid = line.left(pidSep).toLongLong();
result.insert(pid, line.mid(pidSep + 1));
}
return result;
}
static QList<ProcessInfo> getLocalProcessesUsingPs(const FilePath &deviceRoot)
{
QList<ProcessInfo> processes;
// cmdLines are full command lines, usually with absolute path,
// exeNames only the file part of the executable's path.
const QMap<qint64, QString> exeNames = getLocalProcessDataUsingPs(deviceRoot, "comm");
const QMap<qint64, QString> cmdLines = getLocalProcessDataUsingPs(deviceRoot, "args");
for (auto it = exeNames.begin(), end = exeNames.end(); it != end; ++it) {
const qint64 pid = it.key();
if (pid <= 0)
continue;
const QString cmdLine = cmdLines.value(pid);
if (cmdLines.isEmpty())
continue;
const QString exeName = it.value();
if (exeName.isEmpty())
continue;
const int pos = cmdLine.indexOf(exeName);
if (pos == -1)
continue;
processes.append({pid, cmdLine.left(pos + exeName.size()), cmdLine});
}
return processes;
}
static QList<ProcessInfo> getProcessesUsingPidin(const FilePath &pidin)
{
Process process;
process.setCommand({pidin, {"-F", "%a %A {/%n}"}});
process.runBlocking();
QList<ProcessInfo> processes;
QStringList lines = process.readAllStandardOutput().split(QLatin1Char('\n'));
if (lines.isEmpty())
return processes;
lines.pop_front(); // drop headers
const QRegularExpression re("\\s*(\\d+)\\s+(.*){(.*)}");
for (const QString &line : std::as_const(lines)) {
const QRegularExpressionMatch match = re.match(line);
if (match.hasMatch()) {
const QStringList captures = match.capturedTexts();
if (captures.size() == 4) {
const int pid = captures[1].toInt();
const QString args = captures[2];
const QString exe = captures[3];
ProcessInfo deviceProcess;
deviceProcess.processId = pid;
deviceProcess.executable = exe.trimmed();
deviceProcess.commandLine = args.trimmed();
processes.append(deviceProcess);
}
}
}
return Utils::sorted(std::move(processes));
}
static QList<ProcessInfo> processInfoListUnix(const FilePath &deviceRoot)
{
const FilePath procDir = deviceRoot.withNewPath("/proc");
const FilePath pidin = deviceRoot.withNewPath("pidin").searchInPath();
if (pidin.isExecutableFile())
return getProcessesUsingPidin(pidin);
if (procDir.isReadableDir())
return getLocalProcessesUsingProc(procDir);
return getLocalProcessesUsingPs(deviceRoot);
}
#if defined(Q_OS_UNIX)
QList<ProcessInfo> ProcessInfo::processInfoList(const FilePath &deviceRoot)
{
return processInfoListUnix(deviceRoot);
}
#elif defined(Q_OS_WIN)
QList<ProcessInfo> ProcessInfo::processInfoList(const FilePath &deviceRoot)
{
if (deviceRoot.needsDevice())
return processInfoListUnix(deviceRoot);
QList<ProcessInfo> processes;
PROCESSENTRY32 pe;
pe.dwSize = sizeof(PROCESSENTRY32);
HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if (snapshot == INVALID_HANDLE_VALUE)
return processes;
for (bool hasNext = Process32First(snapshot, &pe); hasNext; hasNext = Process32Next(snapshot, &pe)) {
ProcessInfo p;
p.processId = pe.th32ProcessID;
// Image has the absolute path, but can fail.
const QString image = imageName(pe.th32ProcessID);
p.executable = p.commandLine = image.isEmpty() ?
QString::fromWCharArray(pe.szExeFile) : image;
processes << p;
}
CloseHandle(snapshot);
return processes;
}
#endif //Q_OS_WIN
} // namespace Utils
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