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With Chris and Ben's comments taken into account, what's the best way to
handle this?
1. Change the test: if the user is not admin, assert os.tmpfile()
returns a permission denied OSError, otherwise, assert return value is
a current file.
2. Alter posix_tmpfile() to warn the user of the situation if the call
fails and we're on Windows:
Index: posixmodule.c
===================================================================
--- posixmodule.c (revision 61233)
+++ posixmodule.c (working copy)
@@ -7029,8 +7029,15 @@
 FILE *fp;
 fp = tmpfile();
- if (fp == NULL)
+ if (fp == NULL) {
+#ifdef MS_WINDOWS
+ PyErr_Warn(PyExc_RuntimeWarning,
+ "tmpfile creates a file in the root directory and " \
+ "requires administrative privileges, consider using " \
+ "tempfile.mkstemp() instead");
+#endif
 return posix_error();
+ }
 return PyFile_FromFile(fp, "<tmpfile>", "w+b", fclose);
 }
 #endif
3. Alter posix_tmpfile() to use _tempnam() on Windows instead, such
admin privileges are no longer required. (Possibly adding a similar
warning that tempfile.mkstemp should be used instead though, as above?)