327 lines
10 KiB
C
327 lines
10 KiB
C
/*
|
|
* 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
|
|
}
|
|
|