Set FIREBIRD_TMP and FIREBIRD_LOCK with sane values. (firebird-sdbc)

Currently firebird uses /tmp and C://temp/ as default temporary directories,
both of which can be incorrect. Instead we now pass the correct temp
directories to firebird.

Change-Id: I807a47475e76600365e7a2ccfa78d755621dedb7
Reviewed-on: https://gerrit.libreoffice.org/5678Reviewed-by: Tor Lillqvist <tml@iki.fi>
Tested-by: Tor Lillqvist <tml@iki.fi>

connectivity/source/drivers/firebird/Driver.cxx

@@ -26,6 +26,8 @@
 #include "resource/sharedresources.hxx"
 
 #include <comphelper/processfactory.hxx>
+#include <osl/process.h>
+#include <osl/file.hxx>
 
 using namespace com::sun::star;
 using namespace com::sun::star::uno;
@@ -52,9 +54,21 @@ namespace connectivity
     }
 }
 
+// Static const member variables
+const OUString FirebirdDriver::our_sFirebirdTmpVar("FIREBIRD_TMP");
+const OUString FirebirdDriver::our_sFirebirdLockVar("FIREBIRD_LOCK");
+
 FirebirdDriver::FirebirdDriver()
     : ODriver_BASE(m_aMutex)
 {
+    OUString sTmpDir;
+    ::osl::FileBase::getTempDirURL(sTmpDir);
+
+    // Overrides firebird's default of /tmp or c:\temp
+    osl_setEnvironment(our_sFirebirdTmpVar.pData, sTmpDir.pData);
+    // Overrides firebird's default of /tmp/firebird or c:\temp\firebird
+    sTmpDir += "/firebird";
+    osl_setEnvironment(our_sFirebirdLockVar.pData, sTmpDir.pData);
 }
 
 void FirebirdDriver::disposing()
@@ -70,6 +84,9 @@ void FirebirdDriver::disposing()
     }
     m_xConnections.clear();
 
+    osl_clearEnvironment(our_sFirebirdTmpVar.pData);
+    osl_clearEnvironment(our_sFirebirdLockVar.pData);
+
     ODriver_BASE::disposing();
 }
 

connectivity/source/drivers/firebird/Driver.hxx

@@ -44,6 +44,10 @@ namespace connectivity
 
         class FirebirdDriver : public ODriver_BASE
         {
+        private:
+            static const ::rtl::OUString our_sFirebirdTmpVar;
+            static const ::rtl::OUString our_sFirebirdLockVar;
+
         protected:
             ::osl::Mutex                m_aMutex;       // mutex is need to control member access
             OWeakRefArray               m_xConnections; //  vector containing a list