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-rw-r--r--libmount/python/tab.c781
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diff --git a/libmount/python/tab.c b/libmount/python/tab.c
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+++ b/libmount/python/tab.c
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+/*
+ * 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"
+
+static PyMemberDef Table_members[] = {
+ { NULL }
+};
+
+static int Table_set_parser_errcb(TableObject *self, PyObject *func,
+ void *closure __attribute__((unused)))
+{
+ PyObject *tmp;
+
+ if (!func) {
+ PyErr_SetString(PyExc_TypeError, NODEL_ATTR);
+ return -1;
+ }
+
+ if (!PyCallable_Check(func))
+ return -1;
+
+ tmp = self->errcb;
+ Py_INCREF(func);
+ self->errcb = func;
+ Py_XDECREF(tmp);
+ return 0;
+}
+
+static PyObject *Table_get_intro_comment(TableObject *self,
+ void *closure __attribute__((unused)))
+{
+ return PyObjectResultStr(mnt_table_get_intro_comment(self->tab));
+}
+
+static int Table_set_intro_comment(TableObject *self, PyObject *value,
+ void *closure __attribute__((unused)))
+{
+ char *comment = NULL;
+ int rc = 0;
+
+ if (!value) {
+ PyErr_SetString(PyExc_TypeError, NODEL_ATTR);
+ return -1;
+ }
+ if (!(comment = pystos(value)))
+ return -1;
+
+ if ((rc = mnt_table_set_intro_comment(self->tab, comment))) {
+ UL_RaiseExc(-rc);
+ return -1;
+ }
+ return 0;
+}
+
+static PyObject *Table_get_trailing_comment(TableObject *self,
+ void *closure __attribute__((unused)))
+{
+ return PyObjectResultStr(mnt_table_get_trailing_comment(self->tab));
+}
+
+static int Table_set_trailing_comment(TableObject *self, PyObject *value,
+ void *closure __attribute__((unused)))
+{
+ char *comment = NULL;
+ int rc = 0;
+
+ if (!value) {
+ PyErr_SetString(PyExc_TypeError, NODEL_ATTR);
+ return -1;
+ }
+ if (!(comment = pystos(value)))
+ return -1;
+
+ if ((rc = mnt_table_set_trailing_comment(self->tab, comment))) {
+ UL_RaiseExc(-rc);
+ return -1;
+ }
+ return 0;
+}
+
+#define Table_enable_comments_HELP "enable_comments(enable)\n\n" \
+ "Enables parsing of comments.\n\n" \
+ "The initial (intro) file comment is accessible by\n" \
+ "Tab.intro_comment. The intro and the comment of the first fstab" \
+ "entry has to be separated by blank line. The filesystem comments are\n" \
+ "accessible by Fs.comment. The tailing fstab comment is accessible\n" \
+ "by Tab.trailing_comment.\n" \
+ "\n" \
+ "<informalexample>\n" \
+ "<programlisting>\n" \
+ "#\n" \
+ "# Intro comment\n" \
+ "#\n" \
+ "\n" \
+ "# this comments belongs to the first fs\n" \
+ "LABEL=foo /mnt/foo auto defaults 1 2\n" \
+ "# this comments belongs to the second fs\n" \
+ "LABEL=bar /mnt/bar auto defaults 1 2 \n" \
+ "# tailing comment\n" \
+ "</programlisting>\n" \
+ "</informalexample>"
+static PyObject *Table_enable_comments(TableObject *self, PyObject *args,
+ PyObject *kwds)
+{
+ int enable = 0;
+ char *kwlist[] = {"enable", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "i", kwlist, &enable)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ mnt_table_enable_comments(self->tab, enable);
+ Py_INCREF(self);
+ return (PyObject *)self;
+}
+
+#define Table_replace_file_HELP "replace_file(filename)\n\n" \
+ "This function replaces filename with the new content from TableObject."
+static PyObject *Table_replace_file(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ int rc;
+ char *filename = NULL;
+ char *kwlist[] = {"filename", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "s", kwlist, &filename)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ rc = mnt_table_replace_file(self->tab, filename);
+ return rc ? UL_RaiseExc(-rc) : UL_IncRef(self);
+}
+
+#define Table_write_file_HELP "write_file(path)\n\n" \
+ "This function writes tab to file(stream)"
+static PyObject *Table_write_file(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ int rc;
+ //PyObject *stream = NULL;
+ FILE *f = NULL;
+ char *path = NULL;
+ char *kwlist[] = {"path", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "s", kwlist,
+ &path)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ if (!(f = fopen(path, "w")))
+ return UL_RaiseExc(errno);
+ rc = mnt_table_write_file(self->tab, f);
+ fclose(f);
+ return rc ? UL_RaiseExc(-rc) : UL_IncRef(self);
+}
+
+#define Table_find_devno_HELP "find_devno(devno, [direction])\n\n" \
+ "Note that zero could be valid device number for root pseudo " \
+ "filesystem (e.g. tmpfs)\n" \
+ "Returns a tab entry or None"
+static PyObject *Table_find_devno(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ dev_t devno;
+ int direction = MNT_ITER_BACKWARD;
+ char *kwlist[] = {"devno", "direction", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "I|i", kwlist, &devno, &direction)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ return PyObjectResultFs(mnt_table_find_devno(self->tab, devno, direction));
+}
+
+#define Table_find_mountpoint_HELP "find_mountpoint(path, [direction])\n\n" \
+ "Returns a tab entry or None."
+static PyObject *Table_find_mountpoint(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ char *path;
+ int direction = MNT_ITER_BACKWARD;
+ char *kwlist[] = {"path", "direction", NULL};
+
+ if (! PyArg_ParseTupleAndKeywords(args, kwds, "s|i", kwlist, &path, &direction)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ return PyObjectResultFs(mnt_table_find_mountpoint(self->tab, path, direction));
+}
+
+#define Table_find_pair_HELP "find_pair(source, target, [direction])\n\n" \
+ "Returns a tab entry or None."
+static PyObject *Table_find_pair(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"source", "target", "direction", NULL};
+ char *source;
+ char *target;
+ int direction = MNT_ITER_BACKWARD;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "ss|i", kwlist, &source, &target, &direction)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ return PyObjectResultFs(mnt_table_find_pair(self->tab, source, target, direction));
+}
+
+#define Table_find_source_HELP "find_source(source, [direction])\n\n" \
+ "Returns a tab entry or None."
+static PyObject *Table_find_source(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"source", "direction", NULL};
+ char *source;
+ int direction = MNT_ITER_BACKWARD;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|i", kwlist, &source, &direction)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ return PyObjectResultFs(mnt_table_find_source(self->tab, source, direction));
+}
+
+#define Table_find_target_HELP "find_target(target, [direction])\n\n" \
+ "Try to lookup an entry in given tab, possible are three iterations, first\n" \
+ "with path, second with realpath(path) and third with realpath(path)\n" \
+ "against realpath(fs->target). The 2nd and 3rd iterations are not performed\n" \
+ "when tb cache is not set (cache not implemented yet).\n" \
+ "\n" \
+ "Returns a tab entry or None."
+static PyObject *Table_find_target(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"target", "direction", NULL};
+ char *target;
+ int direction = MNT_ITER_BACKWARD;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|i", kwlist, &target, &direction)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ return PyObjectResultFs(mnt_table_find_target(self->tab, target, direction));
+}
+
+#define Table_find_srcpath_HELP "find_srcpath(srcpath, [direction])\n\n" \
+ "Try to lookup an entry in given tab, possible are four iterations, first\n" \
+ "with path, second with realpath(path), third with tags (LABEL, UUID, ..)\n" \
+ "from path and fourth with realpath(path) against realpath(entry->srcpath).\n" \
+ "\n" \
+ "The 2nd, 3rd and 4th iterations are not performed when tb cache is not\n" \
+ "set (not implemented yet).\n" \
+ "\n" \
+ "Note that None is a valid source path; it will be replaced with \"none\". The\n" \
+ "\"none\" is used in /proc/{mounts,self/mountinfo} for pseudo filesystems.\n" \
+ "\n" \
+ "Returns a tab entry or None."
+static PyObject *Table_find_srcpath(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"srcpath", "direction", NULL};
+ char *srcpath;
+ int direction = MNT_ITER_BACKWARD;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|i", kwlist, &srcpath, &direction)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ return PyObjectResultFs(mnt_table_find_srcpath(self->tab, srcpath, direction));
+}
+
+#define Table_find_tag_HELP "find_tag(tag, val, [direction])\n\n" \
+ "Try to lookup an entry in given tab, first attempt is lookup by tag and\n" \
+ "val, for the second attempt the tag is evaluated (converted to the device\n" \
+ "name) and Tab.find_srcpath() is preformed. The second attempt is not\n" \
+ "performed when tb cache is not set (not implemented yet).\n" \
+ "\n" \
+ "Returns a tab entry or NULL."
+static PyObject *Table_find_tag(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ char *kwlist[] = {"tag", "val", "direction", NULL};
+ char *tag;
+ char *val;
+ int direction = MNT_ITER_BACKWARD;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "ss|i", kwlist, &tag, &val, &direction)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ return PyObjectResultFs(mnt_table_find_tag(self->tab, tag, val, direction));
+}
+
+static PyObject *Table_get_nents(TableObject *self)
+{
+ return PyObjectResultInt(mnt_table_get_nents(self->tab));
+}
+
+#define Table_is_fs_mounted_HELP "is_fs_mounted(fstab_fs)\n\n" \
+ "Checks if the fstab_fs entry is already in the tb table. The \"swap\" is\n" \
+ "ignored. This function explicitly compares source, target and root of the\n" \
+ "filesystems.\n" \
+ "\n" \
+ "Note that source and target are canonicalized only if a cache for tb is\n" \
+ "defined (not implemented yet). The target canonicalization may\n" \
+ "trigger automount on autofs mountpoints!\n" \
+ "\n" \
+ "Don't use it if you want to know if a device is mounted, just use\n" \
+ "Tab.find_source() for the device.\n" \
+ "\n" \
+ "This function is designed mostly for \"mount -a\".\n" \
+ "\n" \
+ "Returns a boolean value."
+static PyObject *Table_is_fs_mounted(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ FsObject *fs;
+ char *kwlist[] = {"fstab_fs", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!", kwlist, &FsType, &fs)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ return PyBool_FromLong(mnt_table_is_fs_mounted(self->tab, fs->fs));
+}
+
+#define Table_parse_file_HELP "parse_file(file)\n\n" \
+ "Parses whole table (e.g. /etc/mtab) and appends new records to the tab.\n" \
+ "\n" \
+ "The libmount parser ignores broken (syntax error) lines, these lines are\n" \
+ "reported to caller by errcb() function (see Tab.parser_errcb).\n" \
+ "\n" \
+ "Returns self or raises an exception in case of an error."
+static PyObject *Table_parse_file(TableObject *self, PyObject* args, PyObject *kwds)
+{
+ int rc;
+ char *file = NULL;
+ char *kwlist[] = {"file", NULL};
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "s", kwlist, &file)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ rc = mnt_table_parse_file(self->tab, file);
+ return rc ? UL_RaiseExc(-rc) : UL_IncRef(self);
+}
+
+#define Table_parse_fstab_HELP "parse_fstab([fstab])\n\n" \
+ "This function parses /etc/fstab and appends new lines to the tab. If the\n" \
+ "filename is a directory then Tab.parse_dir() is called.\n" \
+ "\n" \
+ "See also Tab.parser_errcb.\n" \
+ "\n" \
+ "Returns self or raises an exception in case of an error."
+static PyObject *Table_parse_fstab(TableObject *self, PyObject* args, PyObject *kwds)
+{
+ int rc;
+ char *fstab = NULL;
+ char *kwlist[] = {"fstab", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "|s", kwlist, &fstab)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ rc = mnt_table_parse_fstab(self->tab, fstab);
+ return rc ? UL_RaiseExc(-rc) : UL_IncRef(self);
+}
+
+#define Table_parse_mtab_HELP "parse_mtab([mtab])\n\n" \
+ "This function parses /etc/mtab or /proc/self/mountinfo\n" \
+ "/run/mount/utabs or /proc/mounts.\n" \
+ "\n" \
+ "See also Tab.parser_errcb().\n" \
+ "\n" \
+ "Returns self or raises an exception in case of an error."
+static PyObject *Table_parse_mtab(TableObject *self, PyObject* args, PyObject *kwds)
+{
+ int rc;
+ char *mtab = NULL;
+ char *kwlist[] = {"mtab", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "|s", kwlist, &mtab)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ rc = mnt_table_parse_mtab(self->tab, mtab);
+ return rc ? UL_RaiseExc(-rc) : UL_IncRef(self);
+}
+
+#define Table_parse_dir_HELP "parse_dir(dir)\n\n" \
+ "The directory:\n" \
+ "- files are sorted by strverscmp(3)\n" \
+ "- files that start with \".\" are ignored (e.g. \".10foo.fstab\")\n" \
+ "- files without the \".fstab\" extension are ignored\n" \
+ "\n" \
+ "Returns self or raises an exception in case of an error."
+static PyObject *Table_parse_dir(TableObject *self, PyObject* args, PyObject *kwds)
+{
+ int rc;
+ char *dir = NULL;
+ char *kwlist[] = {"dir", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "s", kwlist, &dir)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ rc = mnt_table_parse_dir(self->tab, dir);
+ return rc ? UL_RaiseExc(-rc) : UL_IncRef(self);
+}
+
+#define Table_parse_swaps_HELP "parse_swaps(swaps)\n\n" \
+ "This function parses /proc/swaps and appends new lines to the tab"
+static PyObject *Table_parse_swaps(TableObject *self, PyObject* args, PyObject *kwds)
+{
+ int rc;
+ char *swaps = NULL;
+ char *kwlist[] = {"swaps", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "s", kwlist, &swaps)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ rc = mnt_table_parse_swaps(self->tab, swaps);
+ return rc ? UL_RaiseExc(-rc) : UL_IncRef(self);
+}
+
+#define Table_add_fs_HELP "add_fs(fs)\n\nAdds a new entry to tab.\n" \
+ "Returns self or raises an exception in case of an error."
+
+static PyObject *Table_add_fs(TableObject *self, PyObject* args, PyObject *kwds)
+{
+ int rc;
+ FsObject *fs = NULL;
+ char *kwlist[] = {"fs", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!", kwlist, &FsType, &fs)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ Py_INCREF(fs);
+ rc = mnt_table_add_fs(self->tab, fs->fs);
+ return rc ? UL_RaiseExc(-rc) : UL_IncRef(self);
+}
+
+#define Table_remove_fs_HELP "remove_fs(fs)\n\n" \
+ "Returns self or raises an exception in case of an error."
+static PyObject *Table_remove_fs(TableObject *self, PyObject* args, PyObject *kwds)
+{
+ int rc;
+ FsObject *fs = NULL;
+ char *kwlist[] = {"fs", NULL};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!", kwlist, &FsType, &fs)) {
+ PyErr_SetString(PyExc_TypeError, ARG_ERR);
+ return NULL;
+ }
+ rc = mnt_table_remove_fs(self->tab, fs->fs);
+ Py_DECREF(fs);
+ return rc ? UL_RaiseExc(-rc) : UL_IncRef(self);
+}
+
+#define Table_next_fs_HELP "next_fs()\n\n" \
+ "Returns the next Fs on success, raises an exception in case " \
+ "of an error and None at end of list.\n" \
+ "\n" \
+ "Example:\n" \
+ "<informalexample>\n" \
+ "<programlisting>\n" \
+ "import libmount\n" \
+ "import functools\n" \
+ "for fs in iter(functools.partial(tb.next_fs), None):\n" \
+ " dir = Fs.target\n" \
+ " print \"mount point: {:s}\".format(dir)\n" \
+ "\n" \
+ "</programlisting>\n" \
+ "</informalexample>\n" \
+ "\n" \
+ "lists all mountpoints from fstab in backward order."
+static PyObject *Table_next_fs(TableObject *self)
+{
+ struct libmnt_fs *fs;
+ int rc;
+
+ /* Reset the builtin iterator after reaching the end of the list */
+ rc = mnt_table_next_fs(self->tab, self->iter, &fs);
+ if (rc == 1) {
+ mnt_reset_iter(self->iter, MNT_ITER_FORWARD);
+ Py_RETURN_NONE;
+ } else if (rc)
+ return UL_RaiseExc(-rc);
+
+ return PyObjectResultFs(fs);
+}
+
+static PyMethodDef Table_methods[] = {
+ {"enable_comments", (PyCFunction)Table_enable_comments, METH_VARARGS|METH_KEYWORDS, Table_enable_comments_HELP},
+ {"find_pair", (PyCFunction)Table_find_pair, METH_VARARGS|METH_KEYWORDS, Table_find_pair_HELP},
+ {"find_source", (PyCFunction)Table_find_source, METH_VARARGS|METH_KEYWORDS, Table_find_source_HELP},
+ {"find_srcpath", (PyCFunction)Table_find_srcpath, METH_VARARGS|METH_KEYWORDS, Table_find_srcpath_HELP},
+ {"find_tag", (PyCFunction)Table_find_tag, METH_VARARGS|METH_KEYWORDS, Table_find_tag_HELP},
+ {"find_target", (PyCFunction)Table_find_target, METH_VARARGS|METH_KEYWORDS, Table_find_target_HELP},
+ {"find_devno", (PyCFunction)Table_find_devno, METH_VARARGS|METH_KEYWORDS, Table_find_devno_HELP},
+ {"find_mountpoint", (PyCFunction)Table_find_mountpoint, METH_VARARGS|METH_KEYWORDS, Table_find_mountpoint_HELP},
+ {"parse_file", (PyCFunction)Table_parse_file, METH_VARARGS|METH_KEYWORDS, Table_parse_file_HELP},
+ {"parse_fstab", (PyCFunction)Table_parse_fstab, METH_VARARGS|METH_KEYWORDS, Table_parse_fstab_HELP},
+ {"parse_mtab", (PyCFunction)Table_parse_mtab, METH_VARARGS|METH_KEYWORDS, Table_parse_mtab_HELP},
+ {"parse_dir", (PyCFunction)Table_parse_dir, METH_VARARGS|METH_KEYWORDS, Table_parse_dir_HELP},
+ {"parse_swaps", (PyCFunction)Table_parse_swaps, METH_VARARGS|METH_KEYWORDS, Table_parse_swaps_HELP},
+ {"is_fs_mounted", (PyCFunction)Table_is_fs_mounted, METH_VARARGS|METH_KEYWORDS, Table_is_fs_mounted_HELP},
+ {"add_fs", (PyCFunction)Table_add_fs, METH_VARARGS|METH_KEYWORDS, Table_add_fs_HELP},
+ {"remove_fs", (PyCFunction)Table_remove_fs, METH_VARARGS|METH_KEYWORDS, Table_remove_fs_HELP},
+ {"next_fs", (PyCFunction)Table_next_fs, METH_NOARGS, Table_next_fs_HELP},
+ {"write_file", (PyCFunction)Table_write_file, METH_VARARGS|METH_KEYWORDS, Table_write_file_HELP},
+ {"replace_file", (PyCFunction)Table_replace_file, METH_VARARGS|METH_KEYWORDS, Table_replace_file_HELP},
+ {NULL}
+};
+
+/* mnt_free_tab() with a few necessary additions */
+void Table_unref(struct libmnt_table *tab)
+{
+ struct libmnt_fs *fs;
+ struct libmnt_iter *iter;
+
+ if (!tab)
+ return;
+
+ DBG(TAB, pymnt_debug_h(tab, "un-referencing filesystems"));
+
+ iter = mnt_new_iter(MNT_ITER_BACKWARD);
+
+ /* remove pylibmount specific references to the entries */
+ while (mnt_table_next_fs(tab, iter, &fs) == 0)
+ Py_XDECREF(mnt_fs_get_userdata(fs));
+
+ DBG(TAB, pymnt_debug_h(tab, "un-referencing table"));
+
+ mnt_unref_table(tab);
+ mnt_free_iter(iter);
+}
+
+static void Table_destructor(TableObject *self)
+{
+ DBG(TAB, pymnt_debug_h(self->tab, "destructor py-obj: %p, py-refcnt=%d",
+ self, (int) ((PyObject *) self)->ob_refcnt));
+ Table_unref(self->tab);
+ self->tab = NULL;
+
+ mnt_free_iter(self->iter);
+ Py_XDECREF(self->errcb);
+ PyFree(self);
+}
+
+static PyObject *Table_new(PyTypeObject *type,
+ PyObject *args __attribute__((unused)),
+ PyObject *kwds __attribute__((unused)))
+{
+ TableObject *self = (TableObject*)type->tp_alloc(type, 0);
+
+ if (self) {
+ DBG(TAB, pymnt_debug_h(self, "new"));
+
+ self->tab = NULL;
+ self->iter = NULL;
+ self->errcb = NULL;
+ }
+ return (PyObject *)self;
+}
+
+/* explicit tab.__init__() serves as mnt_reset_table(tab) would in C
+ * and as mnt_new_table{,_from_dir,_from_file}() with proper arguments */
+#define Table_HELP "Table(path=None, errcb=None)"
+static int Table_init(TableObject *self, PyObject *args, PyObject *kwds)
+{
+ struct libmnt_cache *cache;
+ char *path = NULL;
+ char *kwlist[] = {"path", "errcb", NULL};
+ PyObject *errcb = NULL;
+ struct stat buf;
+
+ memset (&buf, 0, sizeof(struct stat));
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "|sO",
+ kwlist, &path, &errcb))
+ return -1;
+
+ DBG(TAB, pymnt_debug_h(self, "init"));
+
+ Table_unref(self->tab);
+ self->tab = NULL;
+
+ if (self->iter)
+ mnt_reset_iter(self->iter, MNT_ITER_FORWARD);
+ else
+ self->iter = mnt_new_iter(MNT_ITER_FORWARD);
+
+ if (errcb) {
+ PyObject *tmp;
+ if (!PyCallable_Check(errcb))
+ return -1;
+ tmp = self->errcb;
+ Py_INCREF(errcb);
+ self->errcb = errcb;
+ Py_XDECREF(tmp);
+ } else {
+ Py_XDECREF(self->errcb);
+ self->errcb = NULL;
+ }
+
+ if (path) {
+ DBG(TAB, pymnt_debug_h(self, "init: path defined (%s)", path));
+
+ if (stat(path, &buf)) {
+ /* TODO: weird */
+ PyErr_SetFromErrno(PyExc_RuntimeError);
+ return -1;
+ }
+ if (S_ISREG(buf.st_mode))
+ self->tab = mnt_new_table_from_file(path);
+ else if (S_ISDIR(buf.st_mode))
+ self->tab = mnt_new_table_from_dir(path);
+ } else {
+ DBG(TAB, pymnt_debug_h(self, "init: allocate empty table"));
+ self->tab = mnt_new_table();
+ }
+
+ /* Always set custom handler when using libmount from python */
+ mnt_table_set_parser_errcb(self->tab, pymnt_table_parser_errcb);
+ mnt_table_set_userdata(self->tab, self);
+
+ cache = mnt_new_cache(); /* TODO: make it optional? */
+ if (!cache)
+ return -1;
+ mnt_table_set_cache(self->tab, cache);
+ mnt_unref_cache(cache);
+
+ return 0;
+}
+
+/* Handler for the tab->errcb callback */
+int pymnt_table_parser_errcb(struct libmnt_table *tb, const char *filename, int line)
+{
+ int rc = 0;
+ PyObject *obj;
+
+ obj = mnt_table_get_userdata(tb);
+ if (obj && ((TableObject*) obj)->errcb) {
+ PyObject *arglist, *result;
+
+ arglist = Py_BuildValue("(Osi)", obj, filename, line);
+ if (!arglist)
+ return -ENOMEM;
+
+ /* A python callback was set, so tb is definitely encapsulated in an object */
+ result = PyEval_CallObject(((TableObject *)obj)->errcb, arglist);
+ Py_DECREF(arglist);
+
+ if (!result)
+ return -EINVAL;
+ if (!PyArg_Parse(result, "i", &rc))
+ rc = -EINVAL;
+ Py_DECREF(result);
+ }
+ return rc;
+}
+
+PyObject *PyObjectResultTab(struct libmnt_table *tab)
+{
+ TableObject *result;
+
+ if (!tab) {
+ PyErr_SetString(LibmountError, "internal exception");
+ return NULL;
+ }
+
+ result = mnt_table_get_userdata(tab);
+ if (result) {
+ Py_INCREF(result);
+ DBG(TAB, pymnt_debug_h(tab, "result py-obj %p: already exists, py-refcnt=%d",
+ result, (int) ((PyObject *) result)->ob_refcnt));
+ return (PyObject *) result;
+ }
+
+ /* Creating an encapsulating object: increment the refcount, so that
+ * code such as: cxt.get_fstab() doesn't call the destructor, which
+ * would free our tab struct as well
+ */
+ result = PyObject_New(TableObject, &TableType);
+ if (!result) {
+ UL_RaiseExc(ENOMEM);
+ return NULL;
+ }
+
+ Py_INCREF(result);
+ mnt_ref_table(tab);
+
+ DBG(TAB, pymnt_debug_h(tab, "result py-obj %p new, py-refcnt=%d",
+ result, (int) ((PyObject *) result)->ob_refcnt));
+ result->tab = tab;
+ result->iter = mnt_new_iter(MNT_ITER_FORWARD);
+ mnt_table_set_userdata(result->tab, result);
+ result->errcb = NULL;
+ return (PyObject *) result;
+}
+
+static PyGetSetDef Table_getseters[] = {
+ {"nents", (getter)Table_get_nents, NULL, "number of valid entries in tab", NULL},
+ {"intro_comment", (getter)Table_get_intro_comment, (setter)Table_set_intro_comment, "fstab intro comment", NULL},
+ {"trailing_comment", (getter)Table_get_trailing_comment, (setter)Table_set_trailing_comment, "fstab trailing comment", NULL},
+ {"errcb", NULL, (setter)Table_set_parser_errcb, "parser error callback", NULL},
+ {NULL}
+};
+
+
+static PyObject *Table_repr(TableObject *self)
+{
+ return PyUnicode_FromFormat(
+ "<libmount.Table object at %p, entries=%d, comments_enabled=%s, errcb=%s>",
+ self,
+ mnt_table_get_nents(self->tab),
+ mnt_table_with_comments(self->tab) ? "True" : "False",
+ self->errcb ? pystos(PyObject_Repr(self->errcb)) : "None");
+}
+
+PyTypeObject TableType = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "libmount.Table", /*tp_name*/
+ sizeof(TableObject), /*tp_basicsize*/
+ 0, /*tp_itemsize*/
+ (destructor)Table_destructor, /*tp_dealloc*/
+ NULL, /*tp_print*/
+ NULL, /*tp_getattr*/
+ NULL, /*tp_setattr*/
+ NULL, /*tp_compare*/
+ (reprfunc) Table_repr, /*tp_repr*/
+ NULL, /*tp_as_number*/
+ NULL, /*tp_as_sequence*/
+ NULL, /*tp_as_mapping*/
+ NULL, /*tp_hash */
+ NULL, /*tp_call*/
+ NULL, /*tp_str*/
+ NULL, /*tp_getattro*/
+ NULL, /*tp_setattro*/
+ NULL, /*tp_as_buffer*/
+ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
+ Table_HELP, /* tp_doc */
+ NULL, /* tp_traverse */
+ NULL, /* tp_clear */
+ NULL, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ NULL, /* tp_iter */
+ NULL, /* tp_iternext */
+ Table_methods, /* tp_methods */
+ Table_members, /* tp_members */
+ Table_getseters, /* tp_getset */
+ NULL, /* tp_base */
+ NULL, /* tp_dict */
+ NULL, /* tp_descr_get */
+ NULL, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ (initproc)Table_init, /* tp_init */
+ NULL, /* tp_alloc */
+ Table_new, /* tp_new */
+};
+
+void Table_AddModuleObject(PyObject *mod)
+{
+ if (PyType_Ready(&TableType) < 0)
+ return;
+
+ DBG(TAB, pymnt_debug("add to module"));
+
+ Py_INCREF(&TableType);
+ PyModule_AddObject(mod, "Table", (PyObject *)&TableType);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 13:33:47 +0000