4 files changed, 15 insertions, 62 deletions
diff --git a/src/network/kernel/qhostinfo.cpp b/src/network/kernel/qhostinfo.cpp
index a2ac9065fd..c6c09542e7 100644
--- a/src/network/kernel/qhostinfo.cpp
+++ b/src/network/kernel/qhostinfo.cpp
@@ -415,10 +415,22 @@ void QHostInfo::setErrorString(const QString &str)
 /*!
     \fn QString QHostInfo::localHostName()
 
-    Returns the host name of this machine.
+    Returns this machine's host name, if one is configured. Note that hostnames
+    are not guaranteed to be globally unique, especially if they were
+    configured automatically.
 
-    \sa hostName()
+    This function does not guarantee the returned host name is a Fully
+    Qualified Domain Name (FQDN). For that, use fromName() to resolve the
+    returned name to an FQDN.
+
+    This function returns the same as QSysInfo::machineHostName().
+
+    \sa hostName(), localDomainName()
 */
+QString QHostInfo::localHostName()
+{
+    return QSysInfo::machineHostName();
+}
 
 /*!
     \fn QString QHostInfo::localDomainName()
diff --git a/src/network/kernel/qhostinfo_unix.cpp b/src/network/kernel/qhostinfo_unix.cpp
index 90a6f763f7..266a67771c 100644
--- a/src/network/kernel/qhostinfo_unix.cpp
+++ b/src/network/kernel/qhostinfo_unix.cpp
@@ -315,15 +315,6 @@ QHostInfo QHostInfoAgent::fromName(const QString &hostName)
     return results;
 }
 
-QString QHostInfo::localHostName()
-{
-    char hostName[512];
-    if (gethostname(hostName, sizeof(hostName)) == -1)
-        return QString();
-    hostName[sizeof(hostName) - 1] = '\0';
-    return QString::fromLocal8Bit(hostName);
-}
-
 QString QHostInfo::localDomainName()
 {
 #if !defined(Q_OS_VXWORKS) && !defined(Q_OS_ANDROID)
diff --git a/src/network/kernel/qhostinfo_win.cpp b/src/network/kernel/qhostinfo_win.cpp
index e044728198..fc65ce9fa2 100644
--- a/src/network/kernel/qhostinfo_win.cpp
+++ b/src/network/kernel/qhostinfo_win.cpp
@@ -111,7 +111,7 @@ QHostInfo QHostInfoAgent::fromName(const QString &hostName)
     QMutexLocker locker(&qPrivCEMutex);
 #endif
 
-    QWindowsSockInit winSock;
+    QSysInfo::machineHostName();        // this initializes ws2_32.dll
 
     // Load res_init on demand.
     static QBasicAtomicInt triedResolve = Q_BASIC_ATOMIC_INITIALIZER(false);
@@ -256,17 +256,6 @@ QHostInfo QHostInfoAgent::fromName(const QString &hostName)
     return results;
 }
 
-QString QHostInfo::localHostName()
-{
-    QWindowsSockInit winSock;
-
-    char hostName[512];
-    if (gethostname(hostName, sizeof(hostName)) == -1)
-        return QString();
-    hostName[sizeof(hostName) - 1] = '\0';
-    return QString::fromLocal8Bit(hostName);
-}
-
 // QString QHostInfo::localDomainName() defined in qnetworkinterface_win.cpp
 
 QT_END_NAMESPACE
diff --git a/src/network/kernel/qhostinfo_winrt.cpp b/src/network/kernel/qhostinfo_winrt.cpp
index 1a97fe0e40..3d2344726b 100644
--- a/src/network/kernel/qhostinfo_winrt.cpp
+++ b/src/network/kernel/qhostinfo_winrt.cpp
@@ -130,45 +130,6 @@ QHostInfo QHostInfoAgent::fromName(const QString &hostName)
     return results;
 }
 
-QString QHostInfo::localHostName()
-{
-    ComPtr<INetworkInformationStatics> statics;
-    GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Networking_Connectivity_NetworkInformation).Get(), &statics);
-
-    ComPtr<IVectorView<HostName *>> hostNames;
-    statics->GetHostNames(&hostNames);
-    if (!hostNames)
-        return QString();
-
-    unsigned int size;
-    hostNames->get_Size(&size);
-    if (size == 0)
-        return QString();
-
-    for (unsigned int i = 0; i < size; ++i) {
-        ComPtr<IHostName> hostName;
-        hostNames->GetAt(i, &hostName);
-        HostNameType type;
-        hostName->get_Type(&type);
-        if (type != HostNameType_DomainName)
-            continue;
-
-        HString name;
-        hostName->get_CanonicalName(name.GetAddressOf());
-        UINT32 length;
-        PCWSTR rawString = name.GetRawBuffer(&length);
-        return QString::fromWCharArray(rawString, length);
-    }
-    ComPtr<IHostName> firstHost;
-    hostNames->GetAt(0, &firstHost);
-
-    HString name;
-    firstHost->get_CanonicalName(name.GetAddressOf());
-    UINT32 length;
-    PCWSTR rawString = name.GetRawBuffer(&length);
-    return QString::fromWCharArray(rawString, length);
-}
-
 // QString QHostInfo::localDomainName() defined in qnetworkinterface_win.cpp
 
 QT_END_NAMESPACE