X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/de6185e212ebc37ff11ff70278e3c4f68419b097..07890fbeb5e65f242e8632ed957c54e188779af2:/src/unix/snglinst.cpp

diff --git a/src/unix/snglinst.cpp b/src/unix/snglinst.cpp
index 26bab35d8b..43674249af 100644
--- a/src/unix/snglinst.cpp
+++ b/src/unix/snglinst.cpp
@@ -348,10 +348,10 @@ bool wxSingleInstanceChecker::Create(const wxString& name,
                                      const wxString& path)
 {
     wxASSERT_MSG( !m_impl,
-                  _T("calling wxSingleInstanceChecker::Create() twice?") );
+                  wxT("calling wxSingleInstanceChecker::Create() twice?") );
 
     // must have the file name to create a lock file
-    wxASSERT_MSG( !name.empty(), _T("lock file name can't be empty") );
+    wxASSERT_MSG( !name.empty(), wxT("lock file name can't be empty") );
 
     m_impl = new wxSingleInstanceCheckerImpl;
 
@@ -361,9 +361,9 @@ bool wxSingleInstanceChecker::Create(const wxString& name,
         fullname = wxGetHomeDir();
     }
 
-    if ( fullname.Last() != _T('/') )
+    if ( fullname.Last() != wxT('/') )
     {
-        fullname += _T('/');
+        fullname += wxT('/');
     }
 
     fullname << name;
@@ -373,11 +373,21 @@ bool wxSingleInstanceChecker::Create(const wxString& name,
 
 bool wxSingleInstanceChecker::IsAnotherRunning() const
 {
-    wxCHECK_MSG( m_impl, false, _T("must call Create() first") );
+    wxCHECK_MSG( m_impl, false, wxT("must call Create() first") );
+
+    const pid_t lockerPid = m_impl->GetLockerPID();
+
+    if ( !lockerPid )
+    {
+        // we failed to open the lock file, return false as we're definitely
+        // not sure that another our process is running and so it's better not
+        // to prevent this one from starting up
+        return false;
+    }
 
     // if another instance is running, it must own the lock file - otherwise
     // we have it and the locker PID is ours one
-    return m_impl->GetLockerPID() != getpid();
+    return lockerPid != getpid();
 }
 
 wxSingleInstanceChecker::~wxSingleInstanceChecker()