1 files changed, 39 insertions, 2 deletions
diff --git a/src/corelib/global/qglobal.cpp b/src/corelib/global/qglobal.cpp
index 5c1665fa00..14fb4e77da 100644
--- a/src/corelib/global/qglobal.cpp
+++ b/src/corelib/global/qglobal.cpp
@@ -2142,11 +2142,20 @@ struct QUnixOSVersion
 
 static QString unquote(const char *begin, const char *end)
 {
+    // man os-release says:
+    // Variable assignment values must be enclosed in double
+    // or single quotes if they include spaces, semicolons or
+    // other special characters outside of A–Z, a–z, 0–9. Shell
+    // special characters ("$", quotes, backslash, backtick)
+    // must be escaped with backslashes, following shell style.
+    // All strings should be in UTF-8 format, and non-printable
+    // characters should not be used. It is not supported to
+    // concatenate multiple individually quoted strings.
     if (*begin == '"') {
         Q_ASSERT(end[-1] == '"');
-        return QString::fromLatin1(begin + 1, end - begin - 2);
+        return QString::fromUtf8(begin + 1, end - begin - 2);
     }
-    return QString::fromLatin1(begin, end - begin);
+    return QString::fromUtf8(begin, end - begin);
 }
 static QByteArray getEtcFileContent(const char *filename)
 {
@@ -3243,6 +3252,34 @@ void *qMemSet(void *dest, int c, size_t n) { return memset(dest, c, n); }
 // add thread-safety for the Qt wrappers.
 static QBasicMutex environmentMutex;
 
+/*
+  Wraps tzset(), which accesses the environment, so should only be called while
+  we hold the lock on the environment mutex.
+*/
+void qTzSet()
+{
+    QMutexLocker locker(&environmentMutex);
+#if defined(Q_OS_WIN)
+    _tzset();
+#else
+    tzset();
+#endif // Q_OS_WIN
+}
+
+/*
+  Wrap mktime(), which is specified to behave as if it called tzset(), hence
+  shares its implicit environment-dependence.
+*/
+time_t qMkTime(struct tm *when)
+{
+    QMutexLocker locker(&environmentMutex);
+    return mktime(when);
+}
+
+// Also specified to behave as if they call tzset():
+// localtime() -- but not localtime_r(), which we use when threaded
+// strftime() -- not used (except in tests)
+
 /*!
     \relates <QtGlobal>
     \threadsafe