mirror of
https://gitlab.gnome.org/GNOME/glib.git
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f9a7ac11f5
This adds cross-platform support for it: on glibc, musl and BSD’s libc, the flag is natively supported. On Windows, convert it to the `N` flag, which similarly indicates that an open file shouldn’t be inherited by child processes. This allows us to unconditionally pass `e` to `g_fopen()` so `O_CLOEXEC` can easily be set on its FDs. Also do the same for `g_freopen()`, since it shares the same underlying mode handling code. Signed-off-by: Philip Withnall <pwithnall@gnome.org>
1472 lines
44 KiB
C
1472 lines
44 KiB
C
/* GDBus - GLib D-Bus Library
|
||
*
|
||
* Copyright (C) 2008-2010 Red Hat, Inc.
|
||
*
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||
* SPDX-License-Identifier: LGPL-2.1-or-later
|
||
*
|
||
* This library 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 2.1 of the License, or (at your option) any later version.
|
||
*
|
||
* This library 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 library; if not, see <http://www.gnu.org/licenses/>.
|
||
*
|
||
* Author: David Zeuthen <davidz@redhat.com>
|
||
*/
|
||
|
||
#include "config.h"
|
||
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <stdio.h>
|
||
#include <errno.h>
|
||
|
||
#include "gioerror.h"
|
||
#include "gdbusutils.h"
|
||
#include "gdbusaddress.h"
|
||
#include "gdbuserror.h"
|
||
#include "gioenumtypes.h"
|
||
#include "glib-private.h"
|
||
#include "gnetworkaddress.h"
|
||
#include "gsocketclient.h"
|
||
#include "giostream.h"
|
||
#include "gasyncresult.h"
|
||
#include "gtask.h"
|
||
#include "glib-private.h"
|
||
#include "gdbusprivate.h"
|
||
#include "gstdio.h"
|
||
|
||
#ifdef HAVE_UNISTD_H
|
||
#include <unistd.h>
|
||
#endif
|
||
#include <sys/stat.h>
|
||
#include <sys/types.h>
|
||
#include <gio/gunixsocketaddress.h>
|
||
|
||
#ifdef G_OS_WIN32
|
||
#include <windows.h>
|
||
#endif
|
||
|
||
#include "glibintl.h"
|
||
|
||
/**
|
||
* GDBusAddress:
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||
*
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||
* Routines for working with D-Bus addresses. A D-Bus address is a string
|
||
* like `unix:tmpdir=/tmp/my-app-name`. The exact format of addresses
|
||
* is explained in detail in the
|
||
* [D-Bus specification](http://dbus.freedesktop.org/doc/dbus-specification.html#addresses).
|
||
*
|
||
* TCP D-Bus connections are supported, but accessing them via a proxy is
|
||
* currently not supported.
|
||
*
|
||
* Since GLib 2.72, `unix:` addresses are supported on Windows with `AF_UNIX`
|
||
* support (Windows 10).
|
||
*/
|
||
|
||
static gchar *get_session_address_platform_specific (GError **error);
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||
static gchar *get_session_address_dbus_launch (GError **error);
|
||
|
||
/* ---------------------------------------------------------------------------------------------------- */
|
||
|
||
/**
|
||
* g_dbus_is_address:
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||
* @string: A string.
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||
*
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||
* Checks if @string is a
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* [D-Bus address](https://dbus.freedesktop.org/doc/dbus-specification.html#addresses).
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*
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||
* This doesn't check if @string is actually supported by #GDBusServer
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||
* or #GDBusConnection - use g_dbus_is_supported_address() to do more
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* checks.
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||
*
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||
* Returns: %TRUE if @string is a valid D-Bus address, %FALSE otherwise.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
gboolean
|
||
g_dbus_is_address (const gchar *string)
|
||
{
|
||
guint n;
|
||
gchar **a;
|
||
gboolean ret;
|
||
|
||
ret = FALSE;
|
||
|
||
g_return_val_if_fail (string != NULL, FALSE);
|
||
|
||
a = g_strsplit (string, ";", 0);
|
||
if (a[0] == NULL)
|
||
goto out;
|
||
|
||
for (n = 0; a[n] != NULL; n++)
|
||
{
|
||
if (!_g_dbus_address_parse_entry (a[n],
|
||
NULL,
|
||
NULL,
|
||
NULL))
|
||
goto out;
|
||
}
|
||
|
||
ret = TRUE;
|
||
|
||
out:
|
||
g_strfreev (a);
|
||
return ret;
|
||
}
|
||
|
||
static gboolean
|
||
is_valid_unix (const gchar *address_entry,
|
||
GHashTable *key_value_pairs,
|
||
GError **error)
|
||
{
|
||
gboolean ret;
|
||
GPtrArray *keys;
|
||
const gchar *path;
|
||
const gchar *dir;
|
||
const gchar *tmpdir;
|
||
const gchar *abstract;
|
||
|
||
ret = FALSE;
|
||
path = NULL;
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||
dir = NULL;
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||
tmpdir = NULL;
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||
abstract = NULL;
|
||
|
||
keys = g_hash_table_get_keys_as_ptr_array (key_value_pairs);
|
||
for (guint i = 0; i < keys->len; ++i)
|
||
{
|
||
const gchar *key = g_ptr_array_index (keys, i);
|
||
if (g_strcmp0 (key, "path") == 0)
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||
path = g_hash_table_lookup (key_value_pairs, key);
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||
else if (g_strcmp0 (key, "dir") == 0)
|
||
dir = g_hash_table_lookup (key_value_pairs, key);
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||
else if (g_strcmp0 (key, "tmpdir") == 0)
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||
tmpdir = g_hash_table_lookup (key_value_pairs, key);
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||
else if (g_strcmp0 (key, "abstract") == 0)
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||
abstract = g_hash_table_lookup (key_value_pairs, key);
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||
else if (g_strcmp0 (key, "guid") != 0)
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||
{
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||
g_set_error (error,
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||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
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||
_("Unsupported key “%s” in address entry “%s”"),
|
||
key,
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||
address_entry);
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||
goto out;
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||
}
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||
}
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||
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||
/* Exactly one key must be set */
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if ((path != NULL) + (dir != NULL) + (tmpdir != NULL) + (abstract != NULL) > 1)
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{
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||
g_set_error (error,
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||
G_IO_ERROR,
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||
G_IO_ERROR_INVALID_ARGUMENT,
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||
_("Meaningless key/value pair combination in address entry “%s”"),
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||
address_entry);
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||
goto out;
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||
}
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||
else if (path == NULL && dir == NULL && tmpdir == NULL && abstract == NULL)
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||
{
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||
g_set_error (error,
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||
G_IO_ERROR,
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||
G_IO_ERROR_INVALID_ARGUMENT,
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||
_("Address “%s” is invalid (need exactly one of path, dir, tmpdir, or abstract keys)"),
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||
address_entry);
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||
goto out;
|
||
}
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||
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||
ret = TRUE;
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||
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||
out:
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||
g_ptr_array_unref (keys);
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||
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||
return ret;
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||
}
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||
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||
static gboolean
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||
is_valid_nonce_tcp (const gchar *address_entry,
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||
GHashTable *key_value_pairs,
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||
GError **error)
|
||
{
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||
gboolean ret;
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||
GPtrArray *keys;
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||
const gchar *host;
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||
const gchar *port;
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||
const gchar *family;
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||
const gchar *nonce_file;
|
||
gint port_num;
|
||
gchar *endp;
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||
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||
ret = FALSE;
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host = NULL;
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port = NULL;
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family = NULL;
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||
nonce_file = NULL;
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||
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||
keys = g_hash_table_get_keys_as_ptr_array (key_value_pairs);
|
||
for (guint i = 0; i < keys->len; ++i)
|
||
{
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||
const gchar *key = g_ptr_array_index (keys, i);
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||
if (g_strcmp0 (key, "host") == 0)
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host = g_hash_table_lookup (key_value_pairs, key);
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else if (g_strcmp0 (key, "port") == 0)
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port = g_hash_table_lookup (key_value_pairs, key);
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else if (g_strcmp0 (key, "family") == 0)
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||
family = g_hash_table_lookup (key_value_pairs, key);
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||
else if (g_strcmp0 (key, "noncefile") == 0)
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||
nonce_file = g_hash_table_lookup (key_value_pairs, key);
|
||
else if (g_strcmp0 (key, "guid") != 0)
|
||
{
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||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
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||
_("Unsupported key “%s” in address entry “%s”"),
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key,
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address_entry);
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goto out;
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||
}
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}
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||
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if (port != NULL)
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{
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port_num = strtol (port, &endp, 10);
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if ((*port == '\0' || *endp != '\0') || port_num < 0 || port_num >= 65536)
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||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error in address “%s” — the “%s” attribute is malformed"),
|
||
address_entry, "port");
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
if (family != NULL && !(g_strcmp0 (family, "ipv4") == 0 || g_strcmp0 (family, "ipv6") == 0))
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error in address “%s” — the “%s” attribute is malformed"),
|
||
address_entry, "family");
|
||
goto out;
|
||
}
|
||
|
||
if (host != NULL)
|
||
{
|
||
/* TODO: validate host */
|
||
}
|
||
|
||
if (nonce_file != NULL && *nonce_file == '\0')
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error in address “%s” — the “%s” attribute is malformed"),
|
||
address_entry, "noncefile");
|
||
goto out;
|
||
}
|
||
|
||
ret = TRUE;
|
||
|
||
out:
|
||
g_ptr_array_unref (keys);
|
||
|
||
return ret;
|
||
}
|
||
|
||
static gboolean
|
||
is_valid_tcp (const gchar *address_entry,
|
||
GHashTable *key_value_pairs,
|
||
GError **error)
|
||
{
|
||
gboolean ret;
|
||
GPtrArray *keys;
|
||
const gchar *host;
|
||
const gchar *port;
|
||
const gchar *family;
|
||
gint port_num;
|
||
gchar *endp;
|
||
|
||
ret = FALSE;
|
||
host = NULL;
|
||
port = NULL;
|
||
family = NULL;
|
||
|
||
keys = g_hash_table_get_keys_as_ptr_array (key_value_pairs);
|
||
for (guint i = 0; i < keys->len; ++i)
|
||
{
|
||
const gchar *key = g_ptr_array_index (keys, i);
|
||
if (g_strcmp0 (key, "host") == 0)
|
||
host = g_hash_table_lookup (key_value_pairs, key);
|
||
else if (g_strcmp0 (key, "port") == 0)
|
||
port = g_hash_table_lookup (key_value_pairs, key);
|
||
else if (g_strcmp0 (key, "family") == 0)
|
||
family = g_hash_table_lookup (key_value_pairs, key);
|
||
else if (g_strcmp0 (key, "guid") != 0)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Unsupported key “%s” in address entry “%s”"),
|
||
key,
|
||
address_entry);
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
if (port != NULL)
|
||
{
|
||
port_num = strtol (port, &endp, 10);
|
||
if ((*port == '\0' || *endp != '\0') || port_num < 0 || port_num >= 65536)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error in address “%s” — the “%s” attribute is malformed"),
|
||
address_entry, "port");
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
if (family != NULL && !(g_strcmp0 (family, "ipv4") == 0 || g_strcmp0 (family, "ipv6") == 0))
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error in address “%s” — the “%s” attribute is malformed"),
|
||
address_entry, "family");
|
||
goto out;
|
||
}
|
||
|
||
if (host != NULL)
|
||
{
|
||
/* TODO: validate host */
|
||
}
|
||
|
||
ret= TRUE;
|
||
|
||
out:
|
||
g_ptr_array_unref (keys);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/**
|
||
* g_dbus_is_supported_address:
|
||
* @string: A string.
|
||
* @error: Return location for error or %NULL.
|
||
*
|
||
* Like g_dbus_is_address() but also checks if the library supports the
|
||
* transports in @string and that key/value pairs for each transport
|
||
* are valid. See the specification of the
|
||
* [D-Bus address format](https://dbus.freedesktop.org/doc/dbus-specification.html#addresses).
|
||
*
|
||
* Returns: %TRUE if @string is a valid D-Bus address that is
|
||
* supported by this library, %FALSE if @error is set.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
gboolean
|
||
g_dbus_is_supported_address (const gchar *string,
|
||
GError **error)
|
||
{
|
||
guint n;
|
||
gchar **a;
|
||
gboolean ret;
|
||
|
||
ret = FALSE;
|
||
|
||
g_return_val_if_fail (string != NULL, FALSE);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
|
||
|
||
a = g_strsplit (string, ";", 0);
|
||
for (n = 0; a[n] != NULL; n++)
|
||
{
|
||
gchar *transport_name;
|
||
GHashTable *key_value_pairs;
|
||
gboolean supported;
|
||
|
||
if (!_g_dbus_address_parse_entry (a[n],
|
||
&transport_name,
|
||
&key_value_pairs,
|
||
error))
|
||
goto out;
|
||
|
||
supported = FALSE;
|
||
if (g_strcmp0 (transport_name, "unix") == 0)
|
||
supported = is_valid_unix (a[n], key_value_pairs, error);
|
||
else if (g_strcmp0 (transport_name, "tcp") == 0)
|
||
supported = is_valid_tcp (a[n], key_value_pairs, error);
|
||
else if (g_strcmp0 (transport_name, "nonce-tcp") == 0)
|
||
supported = is_valid_nonce_tcp (a[n], key_value_pairs, error);
|
||
else if (g_strcmp0 (a[n], "autolaunch:") == 0)
|
||
supported = TRUE;
|
||
else
|
||
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Unknown or unsupported transport “%s” for address “%s”"),
|
||
transport_name, a[n]);
|
||
|
||
g_free (transport_name);
|
||
g_hash_table_unref (key_value_pairs);
|
||
|
||
if (!supported)
|
||
goto out;
|
||
}
|
||
|
||
ret = TRUE;
|
||
|
||
out:
|
||
g_strfreev (a);
|
||
|
||
g_assert (ret || (!ret && (error == NULL || *error != NULL)));
|
||
|
||
return ret;
|
||
}
|
||
|
||
gboolean
|
||
_g_dbus_address_parse_entry (const gchar *address_entry,
|
||
gchar **out_transport_name,
|
||
GHashTable **out_key_value_pairs,
|
||
GError **error)
|
||
{
|
||
gboolean ret;
|
||
GHashTable *key_value_pairs;
|
||
gchar *transport_name;
|
||
gchar **kv_pairs;
|
||
const gchar *s;
|
||
guint n;
|
||
|
||
ret = FALSE;
|
||
kv_pairs = NULL;
|
||
transport_name = NULL;
|
||
key_value_pairs = NULL;
|
||
|
||
s = strchr (address_entry, ':');
|
||
if (s == NULL)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Address element “%s” does not contain a colon (:)"),
|
||
address_entry);
|
||
goto out;
|
||
}
|
||
else if (s == address_entry)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Transport name in address element “%s” must not be empty"),
|
||
address_entry);
|
||
goto out;
|
||
}
|
||
|
||
transport_name = g_strndup (address_entry, s - address_entry);
|
||
key_value_pairs = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
|
||
|
||
kv_pairs = g_strsplit (s + 1, ",", 0);
|
||
for (n = 0; kv_pairs[n] != NULL; n++)
|
||
{
|
||
const gchar *kv_pair = kv_pairs[n];
|
||
gchar *key;
|
||
gchar *value;
|
||
|
||
s = strchr (kv_pair, '=');
|
||
if (s == NULL)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Key/Value pair %d, “%s”, in address element “%s” does not contain an equal sign"),
|
||
n,
|
||
kv_pair,
|
||
address_entry);
|
||
goto out;
|
||
}
|
||
else if (s == kv_pair)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Key/Value pair %d, “%s”, in address element “%s” must not have an empty key"),
|
||
n,
|
||
kv_pair,
|
||
address_entry);
|
||
goto out;
|
||
}
|
||
|
||
key = g_uri_unescape_segment (kv_pair, s, NULL);
|
||
value = g_uri_unescape_segment (s + 1, kv_pair + strlen (kv_pair), NULL);
|
||
if (key == NULL || value == NULL)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error unescaping key or value in Key/Value pair %d, “%s”, in address element “%s”"),
|
||
n,
|
||
kv_pair,
|
||
address_entry);
|
||
g_free (key);
|
||
g_free (value);
|
||
goto out;
|
||
}
|
||
g_hash_table_insert (key_value_pairs, key, value);
|
||
}
|
||
|
||
ret = TRUE;
|
||
|
||
out:
|
||
if (ret)
|
||
{
|
||
if (out_transport_name != NULL)
|
||
*out_transport_name = g_steal_pointer (&transport_name);
|
||
if (out_key_value_pairs != NULL)
|
||
*out_key_value_pairs = g_steal_pointer (&key_value_pairs);
|
||
}
|
||
|
||
g_clear_pointer (&key_value_pairs, g_hash_table_unref);
|
||
g_free (transport_name);
|
||
g_strfreev (kv_pairs);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* ---------------------------------------------------------------------------------------------------- */
|
||
|
||
static GIOStream *
|
||
g_dbus_address_try_connect_one (const gchar *address_entry,
|
||
gchar **out_guid,
|
||
GCancellable *cancellable,
|
||
GError **error);
|
||
|
||
/* TODO: Declare an extension point called GDBusTransport (or similar)
|
||
* and move code below to extensions implementing said extension
|
||
* point. That way we can implement a D-Bus transport over X11 without
|
||
* making libgio link to libX11...
|
||
*/
|
||
static GIOStream *
|
||
g_dbus_address_connect (const gchar *address_entry,
|
||
const gchar *transport_name,
|
||
GHashTable *key_value_pairs,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
GIOStream *ret;
|
||
GSocketConnectable *connectable;
|
||
const gchar *nonce_file;
|
||
|
||
connectable = NULL;
|
||
ret = NULL;
|
||
nonce_file = NULL;
|
||
|
||
if (g_strcmp0 (transport_name, "unix") == 0)
|
||
{
|
||
const gchar *path;
|
||
const gchar *abstract;
|
||
path = g_hash_table_lookup (key_value_pairs, "path");
|
||
abstract = g_hash_table_lookup (key_value_pairs, "abstract");
|
||
if ((path == NULL && abstract == NULL) || (path != NULL && abstract != NULL))
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error in address “%s” — the unix transport requires exactly one of the "
|
||
"keys “path” or “abstract” to be set"),
|
||
address_entry);
|
||
}
|
||
else if (path != NULL)
|
||
{
|
||
connectable = G_SOCKET_CONNECTABLE (g_unix_socket_address_new (path));
|
||
}
|
||
else if (abstract != NULL)
|
||
{
|
||
connectable = G_SOCKET_CONNECTABLE (g_unix_socket_address_new_with_type (abstract,
|
||
-1,
|
||
G_UNIX_SOCKET_ADDRESS_ABSTRACT));
|
||
}
|
||
else
|
||
{
|
||
g_assert_not_reached ();
|
||
}
|
||
}
|
||
else if (g_strcmp0 (transport_name, "tcp") == 0 || g_strcmp0 (transport_name, "nonce-tcp") == 0)
|
||
{
|
||
const gchar *s;
|
||
const gchar *host;
|
||
glong port;
|
||
gchar *endp;
|
||
gboolean is_nonce;
|
||
|
||
is_nonce = (g_strcmp0 (transport_name, "nonce-tcp") == 0);
|
||
|
||
host = g_hash_table_lookup (key_value_pairs, "host");
|
||
if (host == NULL)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
/* Translators: The first placeholder is a D-Bus connection address,
|
||
* the second is the literal name of an attribute in the address.
|
||
*/
|
||
_("Error in address “%s” — the %s attribute is missing or malformed"),
|
||
address_entry,
|
||
"host");
|
||
goto out;
|
||
}
|
||
|
||
s = g_hash_table_lookup (key_value_pairs, "port");
|
||
if (s == NULL)
|
||
s = "0";
|
||
port = strtol (s, &endp, 10);
|
||
if ((*s == '\0' || *endp != '\0') || port < 0 || port >= 65536)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error in address “%s” — the %s attribute is missing or malformed"),
|
||
address_entry,
|
||
"port");
|
||
goto out;
|
||
}
|
||
|
||
|
||
if (is_nonce)
|
||
{
|
||
nonce_file = g_hash_table_lookup (key_value_pairs, "noncefile");
|
||
if (nonce_file == NULL)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error in address “%s” — the %s attribute is missing or malformed"),
|
||
address_entry,
|
||
"noncefile");
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
/* TODO: deal with family key/value-pair */
|
||
connectable = g_network_address_new (host, port);
|
||
}
|
||
else if (g_strcmp0 (address_entry, "autolaunch:") == 0)
|
||
{
|
||
gchar *autolaunch_address;
|
||
autolaunch_address = get_session_address_dbus_launch (error);
|
||
if (autolaunch_address != NULL)
|
||
{
|
||
ret = g_dbus_address_try_connect_one (autolaunch_address, NULL, cancellable, error);
|
||
g_free (autolaunch_address);
|
||
goto out;
|
||
}
|
||
else
|
||
{
|
||
g_prefix_error (error, _("Error auto-launching: "));
|
||
}
|
||
}
|
||
else
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Unknown or unsupported transport “%s” for address “%s”"),
|
||
transport_name,
|
||
address_entry);
|
||
}
|
||
|
||
if (connectable != NULL)
|
||
{
|
||
GSocketClient *client;
|
||
GSocketConnection *connection;
|
||
|
||
g_assert (ret == NULL);
|
||
client = g_socket_client_new ();
|
||
|
||
/* Disable proxy support to prevent a deadlock on startup, since loading a
|
||
* proxy resolver causes the GIO modules to be loaded, and there will
|
||
* almost certainly be one of them which then tries to use GDBus.
|
||
* See: https://bugzilla.gnome.org/show_bug.cgi?id=792499 */
|
||
g_socket_client_set_enable_proxy (client, FALSE);
|
||
|
||
connection = g_socket_client_connect (client,
|
||
connectable,
|
||
cancellable,
|
||
error);
|
||
g_object_unref (connectable);
|
||
g_object_unref (client);
|
||
if (connection == NULL)
|
||
goto out;
|
||
|
||
ret = G_IO_STREAM (connection);
|
||
|
||
if (nonce_file != NULL)
|
||
{
|
||
gchar nonce_contents[16 + 1];
|
||
size_t num_bytes_read;
|
||
FILE *f;
|
||
int errsv;
|
||
|
||
/* be careful to read only 16 bytes - we also check that the file is only 16 bytes long */
|
||
f = g_fopen (nonce_file, "rbe");
|
||
errsv = errno;
|
||
if (f == NULL)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error opening nonce file “%s”: %s"),
|
||
nonce_file,
|
||
g_strerror (errsv));
|
||
g_object_unref (ret);
|
||
ret = NULL;
|
||
goto out;
|
||
}
|
||
num_bytes_read = fread (nonce_contents,
|
||
sizeof (gchar),
|
||
16 + 1,
|
||
f);
|
||
errsv = errno;
|
||
if (num_bytes_read != 16)
|
||
{
|
||
if (num_bytes_read == 0)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error reading from nonce file “%s”: %s"),
|
||
nonce_file,
|
||
g_strerror (errsv));
|
||
}
|
||
else
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("Error reading from nonce file “%s”, expected 16 bytes, got %d"),
|
||
nonce_file,
|
||
(gint) num_bytes_read);
|
||
}
|
||
g_object_unref (ret);
|
||
ret = NULL;
|
||
fclose (f);
|
||
goto out;
|
||
}
|
||
fclose (f);
|
||
|
||
if (!g_output_stream_write_all (g_io_stream_get_output_stream (ret),
|
||
nonce_contents,
|
||
16,
|
||
NULL,
|
||
cancellable,
|
||
error))
|
||
{
|
||
g_prefix_error (error, _("Error writing contents of nonce file “%s” to stream:"), nonce_file);
|
||
g_object_unref (ret);
|
||
ret = NULL;
|
||
goto out;
|
||
}
|
||
}
|
||
}
|
||
|
||
out:
|
||
|
||
return ret;
|
||
}
|
||
|
||
static GIOStream *
|
||
g_dbus_address_try_connect_one (const gchar *address_entry,
|
||
gchar **out_guid,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
GIOStream *ret;
|
||
GHashTable *key_value_pairs;
|
||
gchar *transport_name;
|
||
const gchar *guid;
|
||
|
||
ret = NULL;
|
||
transport_name = NULL;
|
||
key_value_pairs = NULL;
|
||
|
||
if (!_g_dbus_address_parse_entry (address_entry,
|
||
&transport_name,
|
||
&key_value_pairs,
|
||
error))
|
||
goto out;
|
||
|
||
ret = g_dbus_address_connect (address_entry,
|
||
transport_name,
|
||
key_value_pairs,
|
||
cancellable,
|
||
error);
|
||
if (ret == NULL)
|
||
goto out;
|
||
|
||
guid = g_hash_table_lookup (key_value_pairs, "guid");
|
||
if (guid != NULL && out_guid != NULL)
|
||
*out_guid = g_strdup (guid);
|
||
|
||
out:
|
||
g_free (transport_name);
|
||
if (key_value_pairs != NULL)
|
||
g_hash_table_unref (key_value_pairs);
|
||
return ret;
|
||
}
|
||
|
||
|
||
/* ---------------------------------------------------------------------------------------------------- */
|
||
|
||
typedef struct {
|
||
gchar *address;
|
||
gchar *guid;
|
||
} GetStreamData;
|
||
|
||
static void
|
||
get_stream_data_free (GetStreamData *data)
|
||
{
|
||
g_free (data->address);
|
||
g_free (data->guid);
|
||
g_free (data);
|
||
}
|
||
|
||
static void
|
||
get_stream_thread_func (GTask *task,
|
||
gpointer source_object,
|
||
gpointer task_data,
|
||
GCancellable *cancellable)
|
||
{
|
||
GetStreamData *data = task_data;
|
||
GIOStream *stream;
|
||
GError *error = NULL;
|
||
|
||
stream = g_dbus_address_get_stream_sync (data->address,
|
||
&data->guid,
|
||
cancellable,
|
||
&error);
|
||
if (stream)
|
||
g_task_return_pointer (task, stream, g_object_unref);
|
||
else
|
||
g_task_return_error (task, error);
|
||
}
|
||
|
||
/**
|
||
* g_dbus_address_get_stream:
|
||
* @address: A valid D-Bus address.
|
||
* @cancellable: (nullable): A #GCancellable or %NULL.
|
||
* @callback: A #GAsyncReadyCallback to call when the request is satisfied.
|
||
* @user_data: Data to pass to @callback.
|
||
*
|
||
* Asynchronously connects to an endpoint specified by @address and
|
||
* sets up the connection so it is in a state to run the client-side
|
||
* of the D-Bus authentication conversation. @address must be in the
|
||
* [D-Bus address format](https://dbus.freedesktop.org/doc/dbus-specification.html#addresses).
|
||
*
|
||
* When the operation is finished, @callback will be invoked. You can
|
||
* then call g_dbus_address_get_stream_finish() to get the result of
|
||
* the operation.
|
||
*
|
||
* This is an asynchronous failable function. See
|
||
* g_dbus_address_get_stream_sync() for the synchronous version.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
void
|
||
g_dbus_address_get_stream (const gchar *address,
|
||
GCancellable *cancellable,
|
||
GAsyncReadyCallback callback,
|
||
gpointer user_data)
|
||
{
|
||
GTask *task;
|
||
GetStreamData *data;
|
||
|
||
g_return_if_fail (address != NULL);
|
||
|
||
data = g_new0 (GetStreamData, 1);
|
||
data->address = g_strdup (address);
|
||
|
||
task = g_task_new (NULL, cancellable, callback, user_data);
|
||
g_task_set_source_tag (task, g_dbus_address_get_stream);
|
||
g_task_set_task_data (task, data, (GDestroyNotify) get_stream_data_free);
|
||
g_task_run_in_thread (task, get_stream_thread_func);
|
||
g_object_unref (task);
|
||
}
|
||
|
||
/**
|
||
* g_dbus_address_get_stream_finish:
|
||
* @res: A #GAsyncResult obtained from the GAsyncReadyCallback passed to g_dbus_address_get_stream().
|
||
* @out_guid: (optional) (out) (nullable): %NULL or return location to store the GUID extracted from @address, if any.
|
||
* @error: Return location for error or %NULL.
|
||
*
|
||
* Finishes an operation started with g_dbus_address_get_stream().
|
||
*
|
||
* A server is not required to set a GUID, so @out_guid may be set to %NULL
|
||
* even on success.
|
||
*
|
||
* Returns: (transfer full): A #GIOStream or %NULL if @error is set.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
GIOStream *
|
||
g_dbus_address_get_stream_finish (GAsyncResult *res,
|
||
gchar **out_guid,
|
||
GError **error)
|
||
{
|
||
GTask *task;
|
||
GetStreamData *data;
|
||
GIOStream *ret;
|
||
|
||
g_return_val_if_fail (g_task_is_valid (res, NULL), NULL);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
|
||
|
||
task = G_TASK (res);
|
||
ret = g_task_propagate_pointer (task, error);
|
||
|
||
if (ret != NULL && out_guid != NULL)
|
||
{
|
||
data = g_task_get_task_data (task);
|
||
*out_guid = data->guid;
|
||
data->guid = NULL;
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
/**
|
||
* g_dbus_address_get_stream_sync:
|
||
* @address: A valid D-Bus address.
|
||
* @out_guid: (optional) (out) (nullable): %NULL or return location to store the GUID extracted from @address, if any.
|
||
* @cancellable: (nullable): A #GCancellable or %NULL.
|
||
* @error: Return location for error or %NULL.
|
||
*
|
||
* Synchronously connects to an endpoint specified by @address and
|
||
* sets up the connection so it is in a state to run the client-side
|
||
* of the D-Bus authentication conversation. @address must be in the
|
||
* [D-Bus address format](https://dbus.freedesktop.org/doc/dbus-specification.html#addresses).
|
||
*
|
||
* A server is not required to set a GUID, so @out_guid may be set to %NULL
|
||
* even on success.
|
||
*
|
||
* This is a synchronous failable function. See
|
||
* g_dbus_address_get_stream() for the asynchronous version.
|
||
*
|
||
* Returns: (transfer full): A #GIOStream or %NULL if @error is set.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
GIOStream *
|
||
g_dbus_address_get_stream_sync (const gchar *address,
|
||
gchar **out_guid,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
GIOStream *ret;
|
||
gchar **addr_array;
|
||
guint n;
|
||
GError *last_error;
|
||
|
||
g_return_val_if_fail (address != NULL, NULL);
|
||
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
|
||
|
||
ret = NULL;
|
||
last_error = NULL;
|
||
|
||
addr_array = g_strsplit (address, ";", 0);
|
||
if (addr_array[0] == NULL)
|
||
{
|
||
last_error = g_error_new_literal (G_IO_ERROR,
|
||
G_IO_ERROR_INVALID_ARGUMENT,
|
||
_("The given address is empty"));
|
||
goto out;
|
||
}
|
||
|
||
for (n = 0; addr_array[n] != NULL; n++)
|
||
{
|
||
const gchar *addr = addr_array[n];
|
||
GError *this_error;
|
||
|
||
this_error = NULL;
|
||
ret = g_dbus_address_try_connect_one (addr,
|
||
out_guid,
|
||
cancellable,
|
||
&this_error);
|
||
if (ret != NULL)
|
||
{
|
||
goto out;
|
||
}
|
||
else
|
||
{
|
||
g_assert (this_error != NULL);
|
||
if (last_error != NULL)
|
||
g_error_free (last_error);
|
||
last_error = this_error;
|
||
}
|
||
}
|
||
|
||
out:
|
||
if (ret != NULL)
|
||
{
|
||
if (last_error != NULL)
|
||
g_error_free (last_error);
|
||
}
|
||
else
|
||
{
|
||
g_assert (last_error != NULL);
|
||
g_propagate_error (error, last_error);
|
||
}
|
||
|
||
g_strfreev (addr_array);
|
||
return ret;
|
||
}
|
||
|
||
/* ---------------------------------------------------------------------------------------------------- */
|
||
|
||
/*
|
||
* Return the address of XDG_RUNTIME_DIR/bus if it exists, belongs to
|
||
* us, and is a socket, and we are on Unix.
|
||
*/
|
||
static gchar *
|
||
get_session_address_xdg (void)
|
||
{
|
||
#ifdef G_OS_UNIX
|
||
gchar *ret = NULL;
|
||
gchar *bus;
|
||
gchar *tmp;
|
||
GStatBuf buf;
|
||
|
||
bus = g_build_filename (g_get_user_runtime_dir (), "bus", NULL);
|
||
|
||
/* if ENOENT, EPERM, etc., quietly don't use it */
|
||
if (g_stat (bus, &buf) < 0)
|
||
goto out;
|
||
|
||
/* if it isn't ours, we have incorrectly inherited someone else's
|
||
* XDG_RUNTIME_DIR; silently don't use it
|
||
*/
|
||
if (buf.st_uid != geteuid ())
|
||
goto out;
|
||
|
||
/* if it isn't a socket, silently don't use it */
|
||
if ((buf.st_mode & S_IFMT) != S_IFSOCK)
|
||
goto out;
|
||
|
||
tmp = g_dbus_address_escape_value (bus);
|
||
ret = g_strconcat ("unix:path=", tmp, NULL);
|
||
g_free (tmp);
|
||
|
||
out:
|
||
g_free (bus);
|
||
return ret;
|
||
#else
|
||
return NULL;
|
||
#endif
|
||
}
|
||
|
||
/* ---------------------------------------------------------------------------------------------------- */
|
||
|
||
#ifdef G_OS_UNIX
|
||
static gchar *
|
||
get_session_address_dbus_launch (GError **error)
|
||
{
|
||
gchar *ret;
|
||
gchar *machine_id;
|
||
gchar *command_line;
|
||
gchar *launch_stdout;
|
||
gchar *launch_stderr;
|
||
gint wait_status;
|
||
gchar *old_dbus_verbose;
|
||
gboolean restore_dbus_verbose;
|
||
|
||
ret = NULL;
|
||
machine_id = NULL;
|
||
command_line = NULL;
|
||
launch_stdout = NULL;
|
||
launch_stderr = NULL;
|
||
restore_dbus_verbose = FALSE;
|
||
old_dbus_verbose = NULL;
|
||
|
||
/* Don't run binaries as root if we're setuid. */
|
||
if (GLIB_PRIVATE_CALL (g_check_setuid) ())
|
||
{
|
||
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
||
_("Cannot spawn a message bus when AT_SECURE is set"));
|
||
goto out;
|
||
}
|
||
|
||
machine_id = _g_dbus_get_machine_id (error);
|
||
if (machine_id == NULL)
|
||
{
|
||
g_prefix_error (error, _("Cannot spawn a message bus without a machine-id: "));
|
||
goto out;
|
||
}
|
||
|
||
if (g_getenv ("DISPLAY") == NULL)
|
||
{
|
||
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
||
_("Cannot autolaunch D-Bus without X11 $DISPLAY"));
|
||
goto out;
|
||
}
|
||
|
||
/* We're using private libdbus facilities here. When everything
|
||
* (X11, Mac OS X, Windows) is spec'ed out correctly (not even the
|
||
* X11 property is correctly documented right now) we should
|
||
* consider using the spec instead of dbus-launch.
|
||
*
|
||
* --autolaunch=MACHINEID
|
||
* This option implies that dbus-launch should scan for a previ‐
|
||
* ously-started session and reuse the values found there. If no
|
||
* session is found, it will start a new session. The --exit-with-
|
||
* session option is implied if --autolaunch is given. This option
|
||
* is for the exclusive use of libdbus, you do not want to use it
|
||
* manually. It may change in the future.
|
||
*/
|
||
|
||
/* TODO: maybe provide a variable for where to look for the dbus-launch binary? */
|
||
command_line = g_strdup_printf ("dbus-launch --autolaunch=%s --binary-syntax --close-stderr", machine_id);
|
||
|
||
if (G_UNLIKELY (_g_dbus_debug_address ()))
|
||
{
|
||
_g_dbus_debug_print_lock ();
|
||
g_print ("GDBus-debug:Address: Running '%s' to get bus address (possibly autolaunching)\n", command_line);
|
||
old_dbus_verbose = g_strdup (g_getenv ("DBUS_VERBOSE"));
|
||
restore_dbus_verbose = TRUE;
|
||
g_setenv ("DBUS_VERBOSE", "1", TRUE);
|
||
_g_dbus_debug_print_unlock ();
|
||
}
|
||
|
||
if (!g_spawn_command_line_sync (command_line,
|
||
&launch_stdout,
|
||
&launch_stderr,
|
||
&wait_status,
|
||
error))
|
||
{
|
||
goto out;
|
||
}
|
||
|
||
if (!g_spawn_check_wait_status (wait_status, error))
|
||
{
|
||
g_prefix_error (error, _("Error spawning command line “%s”: "), command_line);
|
||
goto out;
|
||
}
|
||
|
||
/* From the dbus-launch(1) man page:
|
||
*
|
||
* --binary-syntax Write to stdout a nul-terminated bus address,
|
||
* then the bus PID as a binary integer of size sizeof(pid_t),
|
||
* then the bus X window ID as a binary integer of size
|
||
* sizeof(long). Integers are in the machine's byte order, not
|
||
* network byte order or any other canonical byte order.
|
||
*/
|
||
ret = g_strdup (launch_stdout);
|
||
|
||
out:
|
||
if (G_UNLIKELY (_g_dbus_debug_address ()))
|
||
{
|
||
gchar *s;
|
||
_g_dbus_debug_print_lock ();
|
||
g_print ("GDBus-debug:Address: dbus-launch output:");
|
||
if (launch_stdout != NULL)
|
||
{
|
||
s = _g_dbus_hexdump (launch_stdout, strlen (launch_stdout) + 1 + sizeof (pid_t) + sizeof (long), 2);
|
||
g_print ("\n%s", s);
|
||
g_free (s);
|
||
}
|
||
else
|
||
{
|
||
g_print (" (none)\n");
|
||
}
|
||
g_print ("GDBus-debug:Address: dbus-launch stderr output:");
|
||
if (launch_stderr != NULL)
|
||
g_print ("\n%s", launch_stderr);
|
||
else
|
||
g_print (" (none)\n");
|
||
_g_dbus_debug_print_unlock ();
|
||
}
|
||
|
||
g_free (machine_id);
|
||
g_free (command_line);
|
||
g_free (launch_stdout);
|
||
g_free (launch_stderr);
|
||
if (G_UNLIKELY (restore_dbus_verbose))
|
||
{
|
||
if (old_dbus_verbose != NULL)
|
||
g_setenv ("DBUS_VERBOSE", old_dbus_verbose, TRUE);
|
||
else
|
||
g_unsetenv ("DBUS_VERBOSE");
|
||
}
|
||
g_free (old_dbus_verbose);
|
||
return ret;
|
||
}
|
||
|
||
/* end of G_OS_UNIX case */
|
||
#elif defined(G_OS_WIN32)
|
||
|
||
static gchar *
|
||
get_session_address_dbus_launch (GError **error)
|
||
{
|
||
return _g_dbus_win32_get_session_address_dbus_launch (error);
|
||
}
|
||
|
||
#else /* neither G_OS_UNIX nor G_OS_WIN32 */
|
||
static gchar *
|
||
get_session_address_dbus_launch (GError **error)
|
||
{
|
||
g_set_error (error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_FAILED,
|
||
_("Cannot determine session bus address (not implemented for this OS)"));
|
||
return NULL;
|
||
}
|
||
#endif /* neither G_OS_UNIX nor G_OS_WIN32 */
|
||
|
||
/* ---------------------------------------------------------------------------------------------------- */
|
||
|
||
static gchar *
|
||
get_session_address_platform_specific (GError **error)
|
||
{
|
||
gchar *ret;
|
||
|
||
/* Use XDG_RUNTIME_DIR/bus if it exists and is suitable. This is appropriate
|
||
* for systems using the "a session is a user-session" model described in
|
||
* <http://lists.freedesktop.org/archives/dbus/2015-January/016522.html>,
|
||
* and implemented in dbus >= 1.9.14 and sd-bus.
|
||
*
|
||
* On systems following the more traditional "a session is a login-session"
|
||
* model, this will fail and we'll fall through to X11 autolaunching
|
||
* (dbus-launch) below.
|
||
*/
|
||
ret = get_session_address_xdg ();
|
||
|
||
if (ret != NULL)
|
||
return ret;
|
||
|
||
/* TODO (#694472): try launchd on OS X, like
|
||
* _dbus_lookup_session_address_launchd() does, since
|
||
* 'dbus-launch --autolaunch' probably won't work there
|
||
*/
|
||
|
||
/* As a last resort, try the "autolaunch:" transport. On Unix this means
|
||
* X11 autolaunching; on Windows this means a different autolaunching
|
||
* mechanism based on shared memory.
|
||
*/
|
||
return get_session_address_dbus_launch (error);
|
||
}
|
||
|
||
/* ---------------------------------------------------------------------------------------------------- */
|
||
|
||
/**
|
||
* g_dbus_address_get_for_bus_sync:
|
||
* @bus_type: a #GBusType
|
||
* @cancellable: (nullable): a #GCancellable or %NULL
|
||
* @error: return location for error or %NULL
|
||
*
|
||
* Synchronously looks up the D-Bus address for the well-known message
|
||
* bus instance specified by @bus_type. This may involve using various
|
||
* platform specific mechanisms.
|
||
*
|
||
* The returned address will be in the
|
||
* [D-Bus address format](https://dbus.freedesktop.org/doc/dbus-specification.html#addresses).
|
||
*
|
||
* Returns: (transfer full): a valid D-Bus address string for @bus_type or
|
||
* %NULL if @error is set
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
gchar *
|
||
g_dbus_address_get_for_bus_sync (GBusType bus_type,
|
||
GCancellable *cancellable,
|
||
GError **error)
|
||
{
|
||
gboolean has_elevated_privileges = GLIB_PRIVATE_CALL (g_check_setuid) ();
|
||
gchar *ret, *s = NULL;
|
||
const gchar *starter_bus;
|
||
GError *local_error;
|
||
|
||
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
|
||
|
||
ret = NULL;
|
||
local_error = NULL;
|
||
|
||
if (G_UNLIKELY (_g_dbus_debug_address ()))
|
||
{
|
||
guint n;
|
||
_g_dbus_debug_print_lock ();
|
||
s = _g_dbus_enum_to_string (G_TYPE_BUS_TYPE, bus_type);
|
||
g_print ("GDBus-debug:Address: In g_dbus_address_get_for_bus_sync() for bus type '%s'\n",
|
||
s);
|
||
g_free (s);
|
||
for (n = 0; n < 3; n++)
|
||
{
|
||
const gchar *k;
|
||
const gchar *v;
|
||
switch (n)
|
||
{
|
||
case 0: k = "DBUS_SESSION_BUS_ADDRESS"; break;
|
||
case 1: k = "DBUS_SYSTEM_BUS_ADDRESS"; break;
|
||
case 2: k = "DBUS_STARTER_BUS_TYPE"; break;
|
||
default: g_assert_not_reached ();
|
||
}
|
||
v = g_getenv (k);
|
||
g_print ("GDBus-debug:Address: env var %s", k);
|
||
if (v != NULL)
|
||
g_print ("='%s'\n", v);
|
||
else
|
||
g_print (" is not set\n");
|
||
}
|
||
_g_dbus_debug_print_unlock ();
|
||
}
|
||
|
||
/* Don’t load the addresses from the environment if running as setuid, as they
|
||
* come from an unprivileged caller. */
|
||
switch (bus_type)
|
||
{
|
||
case G_BUS_TYPE_SYSTEM:
|
||
if (has_elevated_privileges)
|
||
ret = NULL;
|
||
else
|
||
ret = g_strdup (g_getenv ("DBUS_SYSTEM_BUS_ADDRESS"));
|
||
|
||
if (ret == NULL)
|
||
{
|
||
/* While the D-Bus specification says this must be `/var/run/dbus/system_bus_socket`,
|
||
* a footnote allows it to use localstatedir:
|
||
* https://dbus.freedesktop.org/doc/dbus-specification.html#ftn.id-1.13.6.4.3.3
|
||
* or, on systems where /run is the same as /var/run, runstatedir:
|
||
* https://gitlab.freedesktop.org/dbus/dbus/-/merge_requests/209 */
|
||
ret = g_strdup ("unix:path=" GLIB_RUNSTATEDIR "/dbus/system_bus_socket");
|
||
}
|
||
break;
|
||
|
||
case G_BUS_TYPE_SESSION:
|
||
if (has_elevated_privileges)
|
||
ret = NULL;
|
||
else
|
||
ret = g_strdup (g_getenv ("DBUS_SESSION_BUS_ADDRESS"));
|
||
|
||
if (ret == NULL)
|
||
{
|
||
ret = get_session_address_platform_specific (&local_error);
|
||
}
|
||
break;
|
||
|
||
case G_BUS_TYPE_STARTER:
|
||
starter_bus = g_getenv ("DBUS_STARTER_BUS_TYPE");
|
||
if (g_strcmp0 (starter_bus, "session") == 0)
|
||
{
|
||
ret = g_dbus_address_get_for_bus_sync (G_BUS_TYPE_SESSION, cancellable, &local_error);
|
||
goto out;
|
||
}
|
||
else if (g_strcmp0 (starter_bus, "system") == 0)
|
||
{
|
||
ret = g_dbus_address_get_for_bus_sync (G_BUS_TYPE_SYSTEM, cancellable, &local_error);
|
||
goto out;
|
||
}
|
||
else
|
||
{
|
||
if (starter_bus != NULL)
|
||
{
|
||
g_set_error (&local_error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_FAILED,
|
||
_("Cannot determine bus address from DBUS_STARTER_BUS_TYPE environment variable"
|
||
" — unknown value “%s”"),
|
||
starter_bus);
|
||
}
|
||
else
|
||
{
|
||
g_set_error_literal (&local_error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_FAILED,
|
||
_("Cannot determine bus address because the DBUS_STARTER_BUS_TYPE environment "
|
||
"variable is not set"));
|
||
}
|
||
}
|
||
break;
|
||
|
||
default:
|
||
g_set_error (&local_error,
|
||
G_IO_ERROR,
|
||
G_IO_ERROR_FAILED,
|
||
_("Unknown bus type %d"),
|
||
bus_type);
|
||
break;
|
||
}
|
||
|
||
out:
|
||
if (G_UNLIKELY (_g_dbus_debug_address ()))
|
||
{
|
||
_g_dbus_debug_print_lock ();
|
||
s = _g_dbus_enum_to_string (G_TYPE_BUS_TYPE, bus_type);
|
||
if (ret != NULL)
|
||
{
|
||
g_print ("GDBus-debug:Address: Returning address '%s' for bus type '%s'\n",
|
||
ret, s);
|
||
}
|
||
else
|
||
{
|
||
g_print ("GDBus-debug:Address: Cannot look-up address bus type '%s': %s\n",
|
||
s, local_error ? local_error->message : "");
|
||
}
|
||
g_free (s);
|
||
_g_dbus_debug_print_unlock ();
|
||
}
|
||
|
||
if (local_error != NULL)
|
||
g_propagate_error (error, local_error);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/**
|
||
* g_dbus_address_escape_value:
|
||
* @string: an unescaped string to be included in a D-Bus address
|
||
* as the value in a key-value pair
|
||
*
|
||
* Escape @string so it can appear in a D-Bus address as the value
|
||
* part of a key-value pair.
|
||
*
|
||
* For instance, if @string is `/run/bus-for-:0`,
|
||
* this function would return `/run/bus-for-%3A0`,
|
||
* which could be used in a D-Bus address like
|
||
* `unix:nonce-tcp:host=127.0.0.1,port=42,noncefile=/run/bus-for-%3A0`.
|
||
*
|
||
* Returns: (transfer full): a copy of @string with all
|
||
* non-optionally-escaped bytes escaped
|
||
*
|
||
* Since: 2.36
|
||
*/
|
||
gchar *
|
||
g_dbus_address_escape_value (const gchar *string)
|
||
{
|
||
GString *s;
|
||
gsize i;
|
||
|
||
g_return_val_if_fail (string != NULL, NULL);
|
||
|
||
/* There will often not be anything needing escaping at all. */
|
||
s = g_string_sized_new (strlen (string));
|
||
|
||
/* D-Bus address escaping is mostly the same as URI escaping... */
|
||
g_string_append_uri_escaped (s, string, "\\/", FALSE);
|
||
|
||
/* ... but '~' is an unreserved character in URIs, but a
|
||
* non-optionally-escaped character in D-Bus addresses. */
|
||
for (i = 0; i < s->len; i++)
|
||
{
|
||
if (G_UNLIKELY (s->str[i] == '~'))
|
||
{
|
||
s->str[i] = '%';
|
||
g_string_insert (s, i + 1, "7E");
|
||
i += 2;
|
||
}
|
||
}
|
||
|
||
return g_string_free (s, FALSE);
|
||
}
|