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hyperion.ng/libsrc/utils/SysInfo.cpp

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#include "utils/SysInfo.h"
#include <QHostInfo>
#include <QSysInfo>
#include <iostream>
#include <sys/utsname.h>
#include "HyperionConfig.h"
#include <stdlib.h>
#include <limits.h>
#include <stdarg.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
SysInfo* SysInfo::_instance = nullptr;
SysInfo::SysInfo()
: QObject()
{
SysInfo::QUnixOSVersion v;
findUnixOsVersion(v);
_sysinfo.kernelType = kernelType();
_sysinfo.kernelVersion = kernelVersion();
_sysinfo.architecture = currentCpuArchitecture();
_sysinfo.wordSize = QString::number(QSysInfo::WordSize);
_sysinfo.productType = v.productType;
_sysinfo.productVersion = v.productVersion;
_sysinfo.prettyName = v.prettyName;
_sysinfo.hostName = QHostInfo::localHostName();
_sysinfo.domainName = QHostInfo::localDomainName();
}
SysInfo::~SysInfo()
{
}
SysInfo::HyperionSysInfo SysInfo::get()
{
if ( SysInfo::_instance == nullptr )
SysInfo::_instance = new SysInfo();
return SysInfo::_instance->_sysinfo;
}
QString SysInfo::kernelType()
{
#if defined(Q_OS_WIN)
return QStringLiteral("winnt");
#elif defined(Q_OS_UNIX)
struct utsname u;
if (uname(&u) == 0)
return QString::fromLatin1(u.sysname).toLower();
#endif
return QString();
}
QString SysInfo::kernelVersion()
{
struct utsname u;
if (uname(&u) == 0)
return QString::fromLocal8Bit(u.release).toLower();
return QString();
}
QString SysInfo::machineHostName()
{
#if defined(Q_OS_LINUX)
// gethostname(3) on Linux just calls uname(2), so do it ourselves and avoid a memcpy
struct utsname u;
if (uname(&u) == 0)
return QString::fromLocal8Bit(u.nodename);
#else
char hostName[512];
if (gethostname(hostName, sizeof(hostName)) == -1)
return QString();
hostName[sizeof(hostName) - 1] = '\0';
return QString::fromLocal8Bit(hostName);
#endif
return QString();
}
QString SysInfo::currentCpuArchitecture()
{
#if defined(Q_OS_UNIX)
long ret = -1;
struct utsname u;
if (ret == -1)
ret = uname(&u);
// we could use detectUnixVersion() above, but we only need a field no other function does
if (ret != -1)
{
// the use of QT_BUILD_INTERNAL here is simply to ensure all branches build
// as we don't often build on some of the less common platforms
# if defined(Q_PROCESSOR_ARM)
if (strcmp(u.machine, "aarch64") == 0)
return QStringLiteral("arm64");
if (strncmp(u.machine, "armv", 4) == 0)
return QStringLiteral("arm");
# endif
# if defined(Q_PROCESSOR_POWER)
// harmonize "powerpc" and "ppc" to "power"
if (strncmp(u.machine, "ppc", 3) == 0)
return QLatin1String("power") + QLatin1String(u.machine + 3);
if (strncmp(u.machine, "powerpc", 7) == 0)
return QLatin1String("power") + QLatin1String(u.machine + 7);
if (strcmp(u.machine, "Power Macintosh") == 0)
return QLatin1String("power");
# endif
# if defined(Q_PROCESSOR_X86)
// harmonize all "i?86" to "i386"
if (strlen(u.machine) == 4 && u.machine[0] == 'i' && u.machine[2] == '8' && u.machine[3] == '6')
return QStringLiteral("i386");
if (strcmp(u.machine, "amd64") == 0) // Solaris
return QStringLiteral("x86_64");
# endif
return QString::fromLatin1(u.machine);
}
#endif
return QString();
}
bool SysInfo::findUnixOsVersion(SysInfo::QUnixOSVersion &v)
{
if (readEtcOsRelease(v))
return true;
if (readEtcLsbRelease(v))
return true;
#if defined(Q_OS_LINUX)
if (readEtcRedHatRelease(v))
return true;
if (readEtcDebianVersion(v))
return true;
#endif
return false;
}
QByteArray SysInfo::getEtcFileFirstLine(const char *fileName)
{
QByteArray buffer = getEtcFileContent(fileName);
if (buffer.isEmpty())
return QByteArray();
const char *ptr = buffer.constData();
int eol = buffer.indexOf("\n");
return QByteArray(ptr, eol).trimmed();
}
bool SysInfo::readEtcRedHatRelease(SysInfo::QUnixOSVersion &v)
{
// /etc/redhat-release analysed should be a one line file
// the format of its content is <Vendor_ID release Version>
// i.e. "Red Hat Enterprise Linux Workstation release 6.5 (Santiago)"
QByteArray line = getEtcFileFirstLine("/etc/redhat-release");
if (line.isEmpty())
return false;
v.prettyName = QString::fromLatin1(line);
const char keyword[] = "release ";
int releaseIndex = line.indexOf(keyword);
v.productType = QString::fromLatin1(line.mid(0, releaseIndex)).remove(QLatin1Char(' '));
int spaceIndex = line.indexOf(' ', releaseIndex + strlen(keyword));
v.productVersion = QString::fromLatin1(line.mid(releaseIndex + strlen(keyword),
spaceIndex > -1 ? spaceIndex - releaseIndex - int(strlen(keyword)) : -1));
return true;
}
bool SysInfo::readEtcDebianVersion(SysInfo::QUnixOSVersion &v)
{
// /etc/debian_version analysed should be a one line file
// the format of its content is <Release_ID/sid>
// i.e. "jessie/sid"
QByteArray line = getEtcFileFirstLine("/etc/debian_version");
if (line.isEmpty())
return false;
v.productType = QStringLiteral("Debian");
v.productVersion = QString::fromLatin1(line);
return true;
}
QString SysInfo::unquote(const char *begin, const char *end)
{
if (*begin == '"') {
Q_ASSERT(end[-1] == '"');
return QString::fromLatin1(begin + 1, end - begin - 2);
}
return QString::fromLatin1(begin, end - begin);
}
QByteArray SysInfo::getEtcFileContent(const char *filename)
{
// we're avoiding QFile here
int fd = open(filename, O_RDONLY);
if (fd == -1)
return QByteArray();
struct stat sbuf;
if (::fstat(fd, &sbuf) == -1) {
close(fd);
return QByteArray();
}
QByteArray buffer(sbuf.st_size, Qt::Uninitialized);
buffer.resize(read(fd, buffer.data(), sbuf.st_size));
close(fd);
return buffer;
}
bool SysInfo::readEtcFile(SysInfo::QUnixOSVersion &v, const char *filename,
const QByteArray &idKey, const QByteArray &versionKey, const QByteArray &prettyNameKey)
{
QByteArray buffer = getEtcFileContent(filename);
if (buffer.isEmpty())
return false;
const char *ptr = buffer.constData();
const char *end = buffer.constEnd();
const char *eol;
QByteArray line;
for ( ; ptr != end; ptr = eol + 1) {
// find the end of the line after ptr
eol = static_cast<const char *>(memchr(ptr, '\n', end - ptr));
if (!eol)
eol = end - 1;
line.setRawData(ptr, eol - ptr);
if (line.startsWith(idKey)) {
ptr += idKey.length();
v.productType = unquote(ptr, eol);
continue;
}
if (line.startsWith(prettyNameKey)) {
ptr += prettyNameKey.length();
v.prettyName = unquote(ptr, eol);
continue;
}
if (line.startsWith(versionKey)) {
ptr += versionKey.length();
v.productVersion = unquote(ptr, eol);
continue;
}
}
return true;
}
bool SysInfo::readEtcOsRelease(SysInfo::QUnixOSVersion &v)
{
return readEtcFile(v, "/etc/os-release", QByteArrayLiteral("ID="),
QByteArrayLiteral("VERSION_ID="), QByteArrayLiteral("PRETTY_NAME="));
}
bool SysInfo::readEtcLsbRelease(SysInfo::QUnixOSVersion &v)
{
bool ok = readEtcFile(v, "/etc/lsb-release", QByteArrayLiteral("DISTRIB_ID="),
QByteArrayLiteral("DISTRIB_RELEASE="), QByteArrayLiteral("DISTRIB_DESCRIPTION="));
if (ok && (v.prettyName.isEmpty() || v.prettyName == v.productType)) {
// some distributions have redundant information for the pretty name,
// so try /etc/<lowercasename>-release
// we're still avoiding QFile here
QByteArray distrorelease = "/etc/" + v.productType.toLatin1().toLower() + "-release";
int fd = open(distrorelease, O_RDONLY);
if (fd != -1) {
struct stat sbuf;
if (::fstat(fd, &sbuf) != -1 && sbuf.st_size > v.prettyName.length()) {
// file apparently contains interesting information
QByteArray buffer(sbuf.st_size, Qt::Uninitialized);
buffer.resize(read(fd, buffer.data(), sbuf.st_size));
v.prettyName = QString::fromLatin1(buffer.trimmed());
}
close(fd);
}
}
// some distributions have a /etc/lsb-release file that does not provide the values
// we are looking for, i.e. DISTRIB_ID, DISTRIB_RELEASE and DISTRIB_DESCRIPTION.
// Assuming that neither DISTRIB_ID nor DISTRIB_RELEASE were found, or contained valid values,
// returning false for readEtcLsbRelease will allow further /etc/<lowercasename>-release parsing.
return ok && !(v.productType.isEmpty() && v.productVersion.isEmpty());
}
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