SF bug #887946, segfault if redirecting directory
Also provide a warning if a directory is passed on the command line.
Add minimal command line test.
Will backport.
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 5a8c7af..0775bb8 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -947,6 +947,15 @@
m = Py_InitModule3("sys", sys_methods, sys_doc);
sysdict = PyModule_GetDict(m);
+ {
+ /* XXX: does this work on Win/Win64? (see posix_fstat) */
+ struct stat sb;
+ if (fstat(fileno(stdin), &sb) == 0 &&
+ S_ISDIR(sb.st_mode)) {
+ Py_FatalError("<stdin> is a directory");
+ }
+ }
+
/* Closing the standard FILE* if sys.std* goes aways causes problems
* for embedded Python usages. Closing them when somebody explicitly
* invokes .close() might be possible, but the FAQ promises they get