osutil: export a "getfstype" method
This patch exports the "getfstype" method. So we can use it to enable
hardlinks for known safe filesystems.
The patch was tested manually via debugshell on a Linux system.
"mercurial.osutil.getfstype" works as expected. It's hard to mount
filesystem on user-space easily. I will add a test for real hardlink support
to indirectly test this patch, after turning on real hardlinks support for
certain whitelisted filesystems.
--- a/mercurial/osutil.c Mon Mar 20 16:24:59 2017 -0700
+++ b/mercurial/osutil.c Mon Mar 20 16:34:12 2017 -0700
@@ -1079,6 +1079,20 @@
/* End of Linux filesystems */
return NULL;
}
+
+static PyObject *pygetfstype(PyObject *self, PyObject *args)
+{
+ const char *path = NULL;
+ if (!PyArg_ParseTuple(args, "s", &path))
+ return NULL;
+
+ const char *type = getfstype(path);
+ if (type == NULL)
+ Py_RETURN_NONE;
+
+ PyObject *result = Py_BuildValue("s", type);
+ return result;
+}
#endif /* def HAVE_STATFS */
#endif /* ndef _WIN32 */
@@ -1257,6 +1271,10 @@
{"setprocname", (PyCFunction)setprocname, METH_VARARGS,
"set process title (best-effort)\n"},
#endif
+#ifdef HAVE_STATFS
+ {"getfstype", (PyCFunction)pygetfstype, METH_VARARGS,
+ "get filesystem type (best-effort)\n"},
+#endif
#endif /* ndef _WIN32 */
#ifdef __APPLE__
{