Add database permissions logging upon failed access.

core/main_db.py

@@ -7,14 +7,17 @@ from __future__ import (
     unicode_literals,
 )
 
+import os.path
 import re
 import sqlite3
+import sys
 import time
 
 from six import text_type, PY2
 
 import core
 from core import logger
+from core import permissions
 
 if PY2:
     class Row(sqlite3.Row, object):
@@ -60,10 +63,29 @@ def db_filename(filename='nzbtomedia.db', suffix=None):
 
 class DBConnection(object):
     def __init__(self, filename='nzbtomedia.db', suffix=None, row_type=None):
-
         self.filename = filename
-        self.connection = sqlite3.connect(db_filename(filename), 20)
-        self.connection.row_factory = Row
+        path = db_filename(filename)
+        try:
+            self.connection = sqlite3.connect(path, 20)
+        except sqlite3.OperationalError as error:
+            if os.path.exists(path):
+                logger.error('Please check permissions on database: {0}'.format(path))
+            else:
+                logger.error('Database file does not exist')
+                logger.error('Please check permissions on directory: {0}'.format(path))
+                path = os.path.dirname(path)
+            mode = permissions.mode(path)
+            owner, group = permissions.ownership(path)
+            logger.error(
+                "=== PERMISSIONS ===========================\n"
+                "  Path : {0}\n"
+                "  Mode : {1}\n"
+                "  Owner: {2}\n"
+                "  Group: {3}\n"
+                "===========================================".format(path, mode[-3:], owner, group),
+            )
+        else:
+            self.connection.row_factory = Row
 
     def check_db_version(self):
         result = None
@@ -256,7 +278,11 @@ class DBSanityCheck(object):
 
 def upgrade_database(connection, schema):
     logger.log(u'Checking database structure...', logger.MESSAGE)
-    _process_upgrade(connection, schema)
+    try:
+        _process_upgrade(connection, schema)
+    except Exception as error:
+        logger.error(error)
+        sys.exit(1)
 
 
 def pretty_name(class_name):

core/permissions.py

@@ -0,0 +1,64 @@
+import os
+import sys
+import logging
+
+log = logging.getLogger(__name__)
+log.addHandler(logging.NullHandler())
+
+WINDOWS = sys.platform == 'win32'
+POSIX = not WINDOWS
+
+try:
+    import pwd
+    import grp
+except ImportError:
+    if POSIX:
+        raise
+
+try:
+    from win32security import GetNamedSecurityInfo
+    from win32security import LookupAccountSid
+    from win32security import GROUP_SECURITY_INFORMATION
+    from win32security import OWNER_SECURITY_INFORMATION
+    from win32security import SE_FILE_OBJECT
+except ImportError:
+    if WINDOWS:
+        raise
+
+
+def mode(path):
+    """Get permissions."""
+    return oct(os.stat(path).st_mode & 0o777)
+
+
+def nt_ownership(path):
+    """Get the owner and group for a file or directory."""
+    def fully_qualified_name(sid):
+        """Return a fully qualified account name."""
+        name, domain, _acct_type = LookupAccountSid(None, sid)
+        return '{}\\{}'.format(domain, name)
+
+    security_descriptor = GetNamedSecurityInfo(
+        os.fspath(path),
+        SE_FILE_OBJECT,
+        OWNER_SECURITY_INFORMATION | GROUP_SECURITY_INFORMATION,
+    )
+    owner_sid = security_descriptor.GetSecurityDescriptorOwner()
+    group_sid = security_descriptor.GetSecurityDescriptorGroup()
+    owner = fully_qualified_name(owner_sid)
+    group = fully_qualified_name(group_sid)
+    return owner, group
+
+
+def posix_ownership(path):
+    """Get the owner and group for a file or directory."""
+    stat_result = os.stat(path)
+    owner = pwd.getpwuid(stat_result.st_uid)
+    group = grp.getgrgid(stat_result.st_gid)
+    return owner, group
+
+
+if WINDOWS:
+    ownership = nt_ownership
+else:
+    ownership = posix_ownership