[Python-checkins] r78835 - in python/trunk: Lib/sysconfig.py Lib/test/test_sys.py Misc/NEWS Modules/getpath.c
victor.stinner
python-checkins at python.org
Thu Mar 11 13:34:45 CET 2010
Author: victor.stinner
Date: Thu Mar 11 13:34:39 2010
New Revision: 78835
Log:
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.
Modified:
python/trunk/Lib/sysconfig.py
python/trunk/Lib/test/test_sys.py
python/trunk/Misc/NEWS
python/trunk/Modules/getpath.c
Modified: python/trunk/Lib/sysconfig.py
==============================================================================
--- python/trunk/Lib/sysconfig.py (original)
+++ python/trunk/Lib/sysconfig.py Thu Mar 11 13:34:39 2010
@@ -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))
Modified: python/trunk/Lib/test/test_sys.py
==============================================================================
--- python/trunk/Lib/test/test_sys.py (original)
+++ python/trunk/Lib/test/test_sys.py Thu Mar 11 13:34:39 2010
@@ -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):
Modified: python/trunk/Misc/NEWS
==============================================================================
--- python/trunk/Misc/NEWS (original)
+++ python/trunk/Misc/NEWS Thu Mar 11 13:34:39 2010
@@ -12,6 +12,10 @@
Core and Builtins
-----------------
+- 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
+
- Issue #3137: Don't ignore errors at startup, especially a keyboard interrupt
(SIGINT). If an error occurs while importing the site module, the error is
printed and Python exits. Initialize the GIL before importing the site
Modified: python/trunk/Modules/getpath.c
==============================================================================
--- python/trunk/Modules/getpath.c (original)
+++ python/trunk/Modules/getpath.c Thu Mar 11 13:34:39 2010
@@ -441,7 +441,7 @@
}
else
progpath[0] = '\0';
- if (progpath[0] != SEP)
+ if (progpath[0] != SEP && progpath[0] != '\0')
absolutize(progpath);
strncpy(argv0_path, progpath, MAXPATHLEN);
argv0_path[MAXPATHLEN] = '\0';
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