Don't force root, rather catch exceptions; See #49

tracer/main.py

@@ -21,7 +21,7 @@
 from tracer.resources.router import Router
 from tracer.resources.args_parser import parser
 from tracer.resources.package import Package
-from tracer.resources.exceptions import UnsupportedDistribution, PathNotFound, LockedDatabase
+from tracer.resources.exceptions import UnsupportedDistribution, PathNotFound, LockedDatabase, DatabasePermissions
 
 
 def run():
@@ -44,5 +44,9 @@ def run():
 	except (UnsupportedDistribution, PathNotFound, LockedDatabase) as ex:
 		print(ex)
 		exit(1)
+	except DatabasePermissions as ex:
+		print(ex)
+		print("You will probably need to run tracer as root")
+		exit(1)
 	except (KeyboardInterrupt, EOFError):
 		print("")

tracer/packageManagers/portage.py

@@ -27,7 +27,7 @@
 	from tracer.resources.package import Package
 	from tracer.resources.collections import PackagesCollection
 	from gentoolkit.helpers import FileOwner
-	from psutil import AccessDenied
+	from tracer.resources.exceptions import DatabasePermissions
 	from tracer.resources.applications import Applications
 	import os
 	import portage
@@ -51,7 +51,7 @@ def packages_newer_than(self, unix_time):
 			"""
 
 			if not os.access('/var/log/emerge.log', os.R_OK):
-				raise AccessDenied
+				raise DatabasePermissions
 
 			newer = PackagesCollection()
 			process = subprocess.Popen(['qlop', '-lC'], stdout=subprocess.PIPE)

tracer/resources/router.py

@@ -42,9 +42,6 @@ def dispatch(self):
 		elif self.args.version:
 			print(__version__)
 
-		elif os.getuid() != 0:
-			print(_("Only root can use this application"))
-
 		elif self.args.resource:
 			from tracer.controllers.resource import ResourceController
 			controller = ResourceController(self.args)