Adding upstream version 2.38.1.upstream/2.38.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 326 insertions, 0 deletions

diff --git a/libmount/python/pylibmount.c b/libmount/python/pylibmount.c
new file mode 100644
index 0000000..bfc100f
--- /dev/null
+++ b/libmount/python/pylibmount.c
@@ -0,0 +1,326 @@
+/*
+ * Python bindings for the libmount library.
+ *
+ * Copyright (C) 2013, Red Hat, Inc. All rights reserved.
+ * Written by Ondrej Oprala and Karel Zak
+ *
+ * This file is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this file; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include "pylibmount.h"
+
+/* Libmount-specific Exception class */
+PyObject *LibmountError;
+int pylibmount_debug_mask;
+
+PyObject *UL_IncRef(void *killme)
+{
+	Py_INCREF(killme);
+	return killme;
+}
+
+void PyFree(void *o)
+{
+#if PY_MAJOR_VERSION >= 3
+	Py_TYPE(o)->tp_free((PyObject *)o);
+#else
+	((PyObject *)o)->ob_type->tp_free((PyObject *)o);
+#endif
+}
+
+/* Demultiplexer for various possible error conditions across the libmount library */
+void *UL_RaiseExc(int e)
+{
+	/* TODO: Do we need to deal with -1/1? */
+	switch (e) {
+		case ENOMEM:
+			PyErr_SetString(PyExc_MemoryError, strerror(e));
+			break;
+		case EINVAL:
+			PyErr_SetString(PyExc_TypeError, strerror(e));
+			break;
+		/* libmount-specific errors */
+		case MNT_ERR_NOFSTAB:
+			PyErr_SetString(LibmountError, "Not found required entry in fstab");
+			break;
+		case MNT_ERR_NOFSTYPE:
+			PyErr_SetString(LibmountError, "Lailed to detect filesystem type");
+			break;
+		case MNT_ERR_NOSOURCE:
+			PyErr_SetString(LibmountError, "Required mount source undefined");
+			break;
+		case MNT_ERR_LOOPDEV:
+			PyErr_SetString(LibmountError, "Loopdev setup failed");
+			break;
+		case MNT_ERR_APPLYFLAGS:
+			PyErr_SetString(LibmountError, "Failed to parse/use userspace mount options");
+			break;
+		case MNT_ERR_MOUNTOPT:
+			PyErr_SetString(LibmountError, "Failed to apply propagation flags");
+			break;
+		case MNT_ERR_AMBIFS:
+			PyErr_SetString(LibmountError, "Libblkid detected more filesystems on the device");
+			break;
+		case MNT_ERR_LOOPOVERLAP:
+			PyErr_SetString(LibmountError, "Detected overlapping loop device that cannot be re-use");
+			break;
+		case MNT_ERR_LOCK:
+			PyErr_SetString(LibmountError, "Failed to lock mtab/utab or so");
+			break;
+		case MNT_ERR_NAMESPACE:
+			PyErr_SetString(LibmountError, "Failed to switch namespace");
+			break;
+		/* some other errno */
+		default:
+			PyErr_SetString(PyExc_Exception, strerror(e));
+			break;
+	}
+	return NULL;
+}
+
+/*
+ * General functions
+ */
+PyObject *PyObjectResultInt(int i)
+{
+	PyObject *result = Py_BuildValue("i", i);
+	if (!result)
+		PyErr_SetString(PyExc_RuntimeError, CONSTRUCT_ERR);
+	return result;
+}
+
+PyObject *PyObjectResultStr(const char *s)
+{
+	PyObject *result;
+	if (!s)
+		/* TODO: maybe lie about it and return "":
+		 * which would allow for
+		 * fs = libmount.Fs()
+		 * fs.comment += "comment"
+		return Py_BuildValue("s", ""); */
+		Py_RETURN_NONE;
+	result = Py_BuildValue("s", s);
+	if (!result)
+		PyErr_SetString(PyExc_RuntimeError, CONSTRUCT_ERR);
+	return result;
+}
+
+/* wrapper around a common use case for PyUnicode_AsASCIIString() */
+char *pystos(PyObject *pys)
+{
+#if PY_MAJOR_VERSION >= 3
+	if (!PyUnicode_Check(pys)) {
+		PyErr_SetString(PyExc_TypeError, ARG_ERR);
+		return NULL;
+	}
+	return (char *)PyUnicode_1BYTE_DATA(pys);
+#else
+	if (!PyString_Check(pys)) {
+		PyErr_SetString(PyExc_TypeError, ARG_ERR);
+		return NULL;
+	}
+	return PyString_AsString(pys);
+#endif
+}
+
+/*
+ * the libmount module
+ */
+#define PYLIBMOUNT_DESC \
+	"Python API for the util-linux libmount library.\n\n" \
+	"Please note that none of the classes' attributes may be deleted.\n" \
+	"This is not a complete mapping to the libmount C API, nor is it\n" \
+	"attempting to be one.\n" "Iterator functions only allow forward\n" \
+	"iteration for now. Context.get_{user_,}mflags() differs from the C API\n" \
+	"and returns the flags directly. Fs.get_tag() differs from the C API\n" \
+	"and returns a (tag, value) tuple. Every attribute is \"filtered\"" \
+	"through appropriate getters/setters, no values are set directly."
+
+
+struct module_state {
+    PyObject *error;
+};
+
+#if PY_MAJOR_VERSION >= 3
+#define GETSTATE(m) ((struct module_state*)PyModule_GetState(m))
+#else
+#define GETSTATE(m) (&_state)
+static struct module_state _state;
+#endif
+
+static PyObject *
+error_out(PyObject *m __attribute__((unused))) {
+    struct module_state *st = GETSTATE(m);
+    PyErr_SetString(st->error, "something bad happened");
+    return NULL;
+}
+
+static PyMethodDef pylibmount_methods[] = {
+    {"error_out", (PyCFunction)error_out, METH_NOARGS, NULL},
+    {NULL, NULL}
+};
+
+#if PY_MAJOR_VERSION >= 3
+
+static int pylibmount_traverse(PyObject *m, visitproc visit, void *arg) {
+    Py_VISIT(GETSTATE(m)->error);
+    return 0;
+}
+
+static int pylibmount_clear(PyObject *m) {
+    Py_CLEAR(GETSTATE(m)->error);
+    return 0;
+}
+
+static struct PyModuleDef moduledef = {
+        PyModuleDef_HEAD_INIT,
+        "pylibmount",
+        NULL,
+        sizeof(struct module_state),
+        pylibmount_methods,
+        NULL,
+        pylibmount_traverse,
+        pylibmount_clear,
+        NULL
+};
+#define INITERROR return NULL
+PyObject * PyInit_pylibmount(void);
+PyObject * PyInit_pylibmount(void)
+#else
+#define INITERROR return
+# ifndef PyMODINIT_FUNC
+#  define PyMODINIT_FUNC void
+# endif
+PyMODINIT_FUNC initpylibmount(void);
+PyMODINIT_FUNC initpylibmount(void)
+#endif
+{
+#if PY_MAJOR_VERSION >= 3
+	PyObject *m = PyModule_Create(&moduledef);
+#else
+	PyObject *m = Py_InitModule3("pylibmount", pylibmount_methods, PYLIBMOUNT_DESC);
+#endif
+
+	if (!m)
+		INITERROR;
+	/*
+	 * init debug stuff
+	 */
+	if (!(pylibmount_debug_mask & PYMNT_DEBUG_INIT)) {
+		char *str = getenv("PYLIBMOUNT_DEBUG");
+
+		errno = 0;
+		pylibmount_debug_mask = 0;
+		if (str)
+			pylibmount_debug_mask = strtoul(str, NULL, 0);
+		if (errno)
+			pylibmount_debug_mask = 0;
+
+		pylibmount_debug_mask |= PYMNT_DEBUG_INIT;
+	}
+
+	if (pylibmount_debug_mask && pylibmount_debug_mask != PYMNT_DEBUG_INIT)
+		DBG(INIT, pymnt_debug("library debug mask: 0x%04x",
+					pylibmount_debug_mask));
+	mnt_init_debug(0);
+
+	/*
+	 * Add module objects
+	 */
+	LibmountError = PyErr_NewException("libmount.Error", NULL, NULL);
+	Py_INCREF(LibmountError);
+	PyModule_AddObject(m, "Error", (PyObject *)LibmountError);
+
+	FS_AddModuleObject(m);
+	Table_AddModuleObject(m);
+#ifdef __linux__
+	Context_AddModuleObject(m);
+#endif
+
+	/*
+	 * mount(8) userspace options masks (MNT_MAP_USERSPACE map)
+	 */
+	PyModule_AddIntConstant(m, "MNT_MS_COMMENT", MNT_MS_COMMENT);
+	PyModule_AddIntConstant(m, "MNT_MS_GROUP", MNT_MS_GROUP);
+	PyModule_AddIntConstant(m, "MNT_MS_HELPER", MNT_MS_HELPER);
+	PyModule_AddIntConstant(m, "MNT_MS_LOOP", MNT_MS_LOOP);
+	PyModule_AddIntConstant(m, "MNT_MS_NETDEV", MNT_MS_NETDEV);
+	PyModule_AddIntConstant(m, "MNT_MS_NOAUTO", MNT_MS_NOAUTO);
+	PyModule_AddIntConstant(m, "MNT_MS_NOFAIL", MNT_MS_NOFAIL);
+	PyModule_AddIntConstant(m, "MNT_MS_OFFSET", MNT_MS_OFFSET);
+	PyModule_AddIntConstant(m, "MNT_MS_OWNER", MNT_MS_OWNER);
+	PyModule_AddIntConstant(m, "MNT_MS_SIZELIMIT", MNT_MS_SIZELIMIT);
+	PyModule_AddIntConstant(m, "MNT_MS_ENCRYPTION", MNT_MS_ENCRYPTION);
+	PyModule_AddIntConstant(m, "MNT_MS_UHELPER", MNT_MS_UHELPER);
+	PyModule_AddIntConstant(m, "MNT_MS_USER", MNT_MS_USER);
+	PyModule_AddIntConstant(m, "MNT_MS_USERS", MNT_MS_USERS);
+	PyModule_AddIntConstant(m, "MNT_MS_XCOMMENT", MNT_MS_XCOMMENT);
+	PyModule_AddIntConstant(m, "MNT_MS_HASH_DEVICE", MNT_MS_HASH_DEVICE);
+	PyModule_AddIntConstant(m, "MNT_MS_ROOT_HASH", MNT_MS_ROOT_HASH);
+	PyModule_AddIntConstant(m, "MNT_MS_HASH_OFFSET", MNT_MS_HASH_OFFSET);
+	PyModule_AddIntConstant(m, "MNT_MS_ROOT_HASH_FILE", MNT_MS_ROOT_HASH_FILE);
+	PyModule_AddIntConstant(m, "MNT_MS_FEC_DEVICE", MNT_MS_FEC_DEVICE);
+	PyModule_AddIntConstant(m, "MNT_MS_FEC_OFFSET", MNT_MS_FEC_OFFSET);
+	PyModule_AddIntConstant(m, "MNT_MS_FEC_ROOTS", MNT_MS_FEC_ROOTS);
+	PyModule_AddIntConstant(m, "MNT_MS_ROOT_HASH_SIG", MNT_MS_ROOT_HASH_SIG);
+
+	/*
+	 * mount(2) MS_* masks (MNT_MAP_LINUX map)
+	 */
+	PyModule_AddIntConstant(m, "MS_BIND", MS_BIND);
+	PyModule_AddIntConstant(m, "MS_DIRSYNC", MS_DIRSYNC);
+	PyModule_AddIntConstant(m, "MS_I_VERSION", MS_I_VERSION);
+	PyModule_AddIntConstant(m, "MS_MANDLOCK", MS_MANDLOCK);
+	PyModule_AddIntConstant(m, "MS_MGC_MSK", MS_MGC_MSK);
+	PyModule_AddIntConstant(m, "MS_MGC_VAL", MS_MGC_VAL);
+	PyModule_AddIntConstant(m, "MS_MOVE", MS_MOVE);
+	PyModule_AddIntConstant(m, "MS_NOATIME", MS_NOATIME);
+	PyModule_AddIntConstant(m, "MS_NODEV", MS_NODEV);
+	PyModule_AddIntConstant(m, "MS_NODIRATIME", MS_NODIRATIME);
+	PyModule_AddIntConstant(m, "MS_NOEXEC", MS_NOEXEC);
+	PyModule_AddIntConstant(m, "MS_NOSUID", MS_NOSUID);
+	PyModule_AddIntConstant(m, "MS_OWNERSECURE", MS_OWNERSECURE);
+	PyModule_AddIntConstant(m, "MS_PRIVATE", MS_PRIVATE);
+	PyModule_AddIntConstant(m, "MS_PROPAGATION", MS_PROPAGATION);
+	PyModule_AddIntConstant(m, "MS_RDONLY", MS_RDONLY);
+	PyModule_AddIntConstant(m, "MS_REC", MS_REC);
+	PyModule_AddIntConstant(m, "MS_RELATIME", MS_RELATIME);
+	PyModule_AddIntConstant(m, "MS_REMOUNT", MS_REMOUNT);
+	PyModule_AddIntConstant(m, "MS_SECURE", MS_SECURE);
+	PyModule_AddIntConstant(m, "MS_SHARED", MS_SHARED);
+	PyModule_AddIntConstant(m, "MS_SILENT", MS_SILENT);
+	PyModule_AddIntConstant(m, "MS_SLAVE", MS_SLAVE);
+	PyModule_AddIntConstant(m, "MS_STRICTATIME", MS_STRICTATIME);
+	PyModule_AddIntConstant(m, "MS_SYNCHRONOUS", MS_SYNCHRONOUS);
+	PyModule_AddIntConstant(m, "MS_UNBINDABLE", MS_UNBINDABLE);
+
+	/* Will we need these directly?
+	PyModule_AddIntConstant(m, "MNT_ERR_AMBIFS", MNT_ERR_AMBIFS);
+	PyModule_AddIntConstant(m, "MNT_ERR_APPLYFLAGS", MNT_ERR_APPLYFLAGS);
+	PyModule_AddIntConstant(m, "MNT_ERR_LOOPDEV", MNT_ERR_LOOPDEV);
+	PyModule_AddIntConstant(m, "MNT_ERR_MOUNTOPT", MNT_ERR_MOUNTOPT);
+	PyModule_AddIntConstant(m, "MNT_ERR_NOFSTAB", MNT_ERR_NOFSTAB);
+	PyModule_AddIntConstant(m, "MNT_ERR_NOFSTYPE", MNT_ERR_NOFSTYPE);
+	PyModule_AddIntConstant(m, "MNT_ERR_NOSOURCE", MNT_ERR_NOSOURCE);
+	*/
+
+	/* Still useful for functions using iterators internally */
+	PyModule_AddIntConstant(m, "MNT_ITER_FORWARD", MNT_ITER_FORWARD);
+	PyModule_AddIntConstant(m, "MNT_ITER_BACKWARD", MNT_ITER_BACKWARD);
+
+#if PY_MAJOR_VERSION >= 3
+	return m;
+#endif
+}
+