X-Git-Url: https://scripts.mit.edu/gitweb/wizard.git/blobdiff_plain/67f01d68d435ae46218008eaf4a3c91450080a64..6554c6378a6e801b4fe47c50688cdae1d627bc18:/wizard/shell.py

diff --git a/wizard/shell.py b/wizard/shell.py
index cda9eac..723b50d 100644
--- a/wizard/shell.py
+++ b/wizard/shell.py
@@ -131,6 +131,12 @@ class Shell(object):
         if self._async(proc, args, **kwargs):
             return proc
         stdout, stderr = proc.communicate(kwargs["input"])
+        # can occur if we were doing interactive communication; i.e.
+        # we didn't pass in PIPE.
+        if stdout is None:
+            stdout = ""
+        if stderr is None:
+            stderr = ""
         if not kwargs["interactive"]:
             if kwargs["strip"]:
                 self._log(None, stderr)
@@ -151,7 +157,7 @@ class Shell(object):
             logging.debug("STDERR:\n" + stderr)
     def _wait(self):
         pass
-    def _async(self):
+    def _async(self, *args, **kwargs):
         return False
     def callAsUser(self, *args, **kwargs):
         """
@@ -188,6 +194,8 @@ class Shell(object):
         on working directory context.  Keyword arguments are the
         same as :meth:`call`.
         """
+        if os.getuid():
+            return self.call(*args, **kwargs)
         uid = os.stat(os.getcwd()).st_uid
         # consider also checking ruid?
         if uid != os.geteuid():
@@ -307,6 +315,12 @@ class ParallelShell(Shell):
             return
         on_success(stdout, stderr)
 
+# Setup a convenience global instance
+shell = Shell()
+call = shell.call
+callAsUser = shell.callAsUser
+safeCall = shell.safeCall
+eval = shell.eval
 
 class DummyParallelShell(ParallelShell):
     """Same API as :class:`ParallelShell`, but doesn't actually