Wrappers for safely calling commands in a new PAG

[Scripts/git/.git] / __init__.py

diff --git a/__init__.py b/__init__.py
index d0f6993c2df941ae3b4bcc6f890e4a7f18653d85..8f9356d04f4e774aa48ab88b9456a44a9798450a 100644 (file)
--- a/__init__.py
+++ b/__init__.py
@@ -1,3 +1,4 @@
+import os
 import subprocess
 import ldap
 import ldap.filter
@@ -9,6 +10,8 @@ from django.contrib.auth import REDIRECT_FIELD_NAME
 from django.http import HttpResponseRedirect
 from django.contrib import auth
 from django.core.exceptions import ObjectDoesNotExist
+from django.core.validators import URLValidator, ValidationError
+
 import settings
 
 def zephyr(msg, clas='message', instance='log', rcpt='nobody',):
@@ -18,6 +21,41 @@ def zephyr(msg, clas='message', instance='log', rcpt='nobody',):
     )
     proc.communicate(msg)
 
+def UrlOrAfsValidator(value):
+    if value.startswith('/mit/') or value.startswith('/afs/'):
+        return
+    else:
+        try:
+            URLValidator()(value)
+        except ValidationError:
+            raise ValidationError('Provide a valid URL or AFS path')
+
+def pag_check_helper(fn, args, aklog=False, ccname=None, **kwargs):
+    if 'executable' in kwargs:
+        raise ValueError('"executable" not supported with pag_check_*')
+
+    env = None
+    if 'env' in kwargs:
+        env = kwargs['env']
+        del kwargs['env']
+    if ccname:
+        if env is not None:
+            env = dict(env)
+        else:
+            env = dict(os.environ)
+        env['KRB5CCNAME'] = ccname
+
+    pagsh_cmd = 'exec "$@"'
+    if aklog: pagsh_cmd = "aklog && " + pagsh_cmd
+    args = ['pagsh', '-c', pagsh_cmd, 'exec', ] + args
+
+    return fn(args, env=env, **kwargs)
+
+def pag_check_call(args, **kwargs):
+    return pag_check_helper(subprocess.check_call, args, **kwargs)
+def pag_check_output(args, **kwargs):
+    return pag_check_helper(subprocess.check_output, args, **kwargs)
+
 class ScriptsRemoteUserMiddleware(RemoteUserMiddleware):
     header = 'SSL_CLIENT_S_DN_Email'