Issue #7774: Set sys.executable to an empty string if argv[0] has been
set to an non existent program name and Python is unable to retrieve the real
program name.
Fix also sysconfig: if sys.executable is an empty string, use the current
working directory.
diff --git a/Lib/sysconfig.py b/Lib/sysconfig.py
index 69264d2..a11a412 100644
--- a/Lib/sysconfig.py
+++ b/Lib/sysconfig.py
@@ -84,7 +84,12 @@
_EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
_CONFIG_VARS = None
_USER_BASE = None
-_PROJECT_BASE = os.path.dirname(realpath(sys.executable))
+if sys.executable:
+ _PROJECT_BASE = os.path.dirname(realpath(sys.executable))
+else:
+ # sys.executable can be empty if argv[0] has been changed and Python is
+ # unable to retrieve the real program name
+ _PROJECT_BASE = realpath(os.getcwd())
if os.name == "nt" and "pcbuild" in _PROJECT_BASE[-8:].lower():
_PROJECT_BASE = realpath(os.path.join(_PROJECT_BASE, pardir))
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index 15b88ce..e41814b 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -437,6 +437,17 @@
self.assertEqual(sys.call_tracing(str, (2,)), "2")
self.assertRaises(TypeError, sys.call_tracing, str, 2)
+ def test_executable(self):
+ # Issue #7774: Ensure that sys.executable is an empty string if argv[0]
+ # has been set to an non existent program name and Python is unable to
+ # retrieve the real program name
+ import subprocess
+ p = subprocess.Popen(
+ ["nonexistent", "-c", 'import sys; print "executable=%r" % sys.executable'],
+ executable=sys.executable, stdout=subprocess.PIPE)
+ executable = p.communicate()[0].strip()
+ p.wait()
+ self.assertEqual(executable, "executable=''")
class SizeofTest(unittest.TestCase):