From 2e42090a0d4bade9c1fe37daf8d73c0e7dab2194 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 19 Aug 2010 11:35:32 -0600
Subject: [PATCH] Linux environment: Use atemporary dir as the config directory
 if write access to the normal config directory is unavailable. Can be
 overriden by using the CALIBRE_CONFIG_DIRECTORY environment variable

---
 src/calibre/constants.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/calibre/constants.py b/src/calibre/constants.py
index f8d6253912..b78e28be03 100644
--- a/src/calibre/constants.py
+++ b/src/calibre/constants.py
@@ -98,5 +98,16 @@ elif isosx:
 else:
     bdir = os.path.abspath(os.path.expanduser(os.environ.get('XDG_CONFIG_HOME', '~/.config')))
     config_dir = os.path.join(bdir, 'calibre')
+    if not os.access(config_dir, os.W_OK):
+        print 'No write acces to', config_dir, 'using a temporary dir instead'
+        import tempfile, atexit
+        config_dir = tempfile.mkdtemp(prefix='calibre-config-')
+        def cleanup_cdir():
+            try:
+                import shutil
+                shutil.rmtree(config_dir)
+            except:
+                pass
+        atexit.register(cleanup_cdir)
 # }}}