Merged revisions 78835-78837 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r78835 | victor.stinner | 2010-03-11 13:34:39 +0100 (jeu., 11 mars 2010) | 7 lines
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.
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r78836 | victor.stinner | 2010-03-11 14:27:35 +0100 (jeu., 11 mars 2010) | 4 lines
Fix test_executable introduce in previous commit (r78835): Windows is able to
retrieve the absolute Python path even if argv[0] has been set to a non
existent program name.
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r78837 | victor.stinner | 2010-03-11 14:46:06 +0100 (jeu., 11 mars 2010) | 3 lines
Another fix to test_executable() of test_sys: set the current working to avoid
the #7774 bug.
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diff --git a/Lib/sysconfig.py b/Lib/sysconfig.py
index 619e458..0122f08 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 e20c95f..eb0bef8 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -479,6 +479,23 @@
out = p.communicate()[0].strip()
self.assertEqual(out, b'?')
+ 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
+ # For a normal installation, it should work without 'cwd'
+ # argument. For test runs in the build directory, see #7774.
+ python_dir = os.path.dirname(os.path.realpath(sys.executable))
+ p = subprocess.Popen(
+ ["nonexistent", "-c",
+ 'import sys; print(sys.executable.encode("ascii", "backslashreplace"))'],
+ executable=sys.executable, stdout=subprocess.PIPE, cwd=python_dir)
+ stdout = p.communicate()[0]
+ executable = stdout.strip().decode("ASCII")
+ p.wait()
+ self.assertIn(executable, ["b''", repr(sys.executable.encode("ascii", "backslashreplace"))])
+
class SizeofTest(unittest.TestCase):