test for special keys first, before testing for alphanumeric ones as even keys such...

[wxWidgets.git] / src / unix / stdpaths.cpp

diff --git a/src/unix/stdpaths.cpp b/src/unix/stdpaths.cpp
index cc425db3b43026bda55420a33f372d92164b6e80..e81f673d205d792e4cf75ab64d8eb1dba17683b1 100644 (file)
--- a/src/unix/stdpaths.cpp
+++ b/src/unix/stdpaths.cpp
@@ -26,14 +26,14 @@
 
 #if wxUSE_STDPATHS
 
+#include "wx/stdpaths.h"
+
 #ifndef WX_PRECOMP
-    #include "wx/app.h"
+    #include "wx/utils.h"
 #endif //WX_PRECOMP
 
 #include "wx/filename.h"
 
-#include "wx/stdpaths.h"
-
 #if defined( __LINUX__ ) || defined( __VMS )
     #include <unistd.h>
 #endif
@@ -100,40 +100,77 @@ wxStandardPaths::GetLocalizedResourcesDir(const wxChar *lang,
     return wxStandardPathsBase::GetLocalizedResourcesDir(lang, category);
 }
 
+wxString wxStandardPaths::GetExecutablePath() const
+{
+    return wxStandardPathsBase::GetExecutablePath();
+}
+
 #else // !__VMS
 
 // ============================================================================
 // wxStandardPaths implementation for Unix
 // ============================================================================
 
-wxString wxStandardPaths::GetInstallPrefix() const
+wxString wxStandardPaths::GetExecutablePath() const
 {
-    if ( m_prefix.empty() )
+#ifdef __LINUX__
+    wxString exeStr;
+
+    char buf[4096];
+    int result = readlink("/proc/self/exe", buf, WXSIZEOF(buf) - sizeof(char));
+    if ( result != -1 )
     {
-        wxStandardPaths *pathPtr = wx_const_cast(wxStandardPaths *, this);
+        buf[result] = '\0'; // readlink() doesn't NUL-terminate the buffer
 
-#ifdef __LINUX__
-        // under Linux, we can try to infer the prefix from the location of the
-        // executable
-        char buf[4096];
-        int result = readlink("/proc/self/exe", buf, WXSIZEOF(buf) - sizeof(char));
-        if ( result != -1 )
-        {
-            buf[result] = '\0'; // readlink() doesn't NUL-terminate the buffer
-
-            const wxString exeStr(buf, wxConvLibc);
-
-            // consider that we're in the last "bin" subdirectory of our prefix
-            size_t pos = exeStr.rfind(wxT("/bin/"));
-            if ( pos != wxString::npos )
-                pathPtr->m_prefix.assign(exeStr, 0, pos);
-        }
+        // if the /proc/self/exe symlink has been dropped by the kernel for
+        // some reason, then readlink() could also return success but
+        // "(deleted)" as link destination...
+        if ( strcmp(buf, "(deleted)") != 0 )
+            exeStr = wxString(buf, wxConvLibc);
+    }
+
+    if ( exeStr.empty() )
+    {
+        // UPX-specific hack: when using UPX on linux, the kernel will drop the
+        // /proc/self/exe link; in this case we try to look for a special
+        // environment variable called "   " which is created by UPX to save
+        // /proc/self/exe contents. See
+        //      http://sf.net/tracker/?func=detail&atid=309863&aid=1565357&group_id=9863
+        // for more information about this issue.
+        wxGetEnv(wxT("   "), &exeStr);
+    }
+
+    if ( !exeStr.empty() )
+        return exeStr;
 #endif // __LINUX__
 
-        if ( m_prefix.empty() )
-        {
-            pathPtr->m_prefix = wxT("/usr/local");
-        }
+    return wxStandardPathsBase::GetExecutablePath();
+}
+
+void wxStandardPaths::DetectPrefix()
+{
+    // we can try to infer the prefix from the location of the executable
+    wxString exeStr = GetExecutablePath();
+    if ( !exeStr.empty() )
+    {
+        // consider that we're in the last "bin" subdirectory of our prefix
+        size_t pos = exeStr.rfind(wxT("/bin/"));
+        if ( pos != wxString::npos )
+            m_prefix.assign(exeStr, 0, pos);
+    }
+
+    if ( m_prefix.empty() )
+    {
+        m_prefix = wxT("/usr/local");
+    }
+}
+
+wxString wxStandardPaths::GetInstallPrefix() const
+{
+    if ( m_prefix.empty() )
+    {
+        wxStandardPaths *pathPtr = wx_const_cast(wxStandardPaths *, this);
+        pathPtr->DetectPrefix();
     }
 
     return m_prefix;