Issue 6070: when creating a compiled file, after copying the mode bits, on

posix zap the execute bit in case it was set on the .py file, since the
compiled files are not directly executable on posix.  Patch by Marco N.

Lib/test/test_import.py

 import unittest
 import os
+import stat
 import random
 import shutil
 import sys
@@ -91,6 +92,23 @@ class ImportTest(unittest.TestCase):
         finally:
             del sys.path[0]
 
+    @unittest.skipUnless(os.name == 'posix', "test meaningful only on posix systems")
+    def test_execute_bit_not_copied(self):
+        # Issue 6070: under posix .pyc files got their execute bit set if
+        # the .py file had the execute bit set, but they aren't executable.
+        try:
+            fname = TESTFN + os.extsep + "py"
+            f = open(fname, 'w').close()
+            os.chmod(fname, (stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH |
+                             stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH))
+            __import__(TESTFN)
+            s = os.stat(fname + 'c')
+            self.assertEquals(stat.S_IMODE(s.st_mode),
+                              stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
+        finally:
+            remove_files(TESTFN)
+            del sys.modules[TESTFN]
+
     def testImpModule(self):
         # Verify that the imp module can correctly load and find .py files
         import imp
@@ -232,6 +250,7 @@ class ImportTest(unittest.TestCase):
         else:
             self.fail("import by path didn't raise an exception")
 
+
 class TestPycRewriting(unittest.TestCase):
     # Test that the `co_filename` attribute on code objects always points
     # to the right file, even when various things happen (e.g. both the .py

Misc/NEWS

@@ -12,6 +12,9 @@ What's New in Python 2.7 alpha 1
 Core and Builtins
 -----------------
 
+- Issue 6070: On posix platforms import no longer copies the execute bit
+  from the .py file to the .pyc file if it is set.  Patch by Marco N.
+
 - Issue #4618: When unicode arguments are passed to print(), the default
   separator and end should be unicode also.
 

Python/import.c

@@ -881,7 +881,9 @@ write_compiled_module(PyCodeObject *co, char *cpathname, struct stat *srcstat)
 {
 	FILE *fp;
 	time_t mtime = srcstat->st_mtime;
-	mode_t mode = srcstat->st_mode;
+#ifndef MS_WINDOWS
+	mode_t mode = srcstat->st_mode & ~S_IXUSR & ~S_IXGRP & ~S_IXOTH;
+#endif 
 
 	fp = open_exclusive(cpathname, mode);
 	if (fp == NULL) {