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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright 2016 Red Hat, Inc.
*
* 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/>.
*/
#include "config.h"
#include "glib-private.h"
#include "gportalsupport.h"
#include "gsandbox.h"
static GSandboxType sandbox_type = G_SANDBOX_TYPE_UNKNOWN;
static gboolean use_portal;
static gboolean network_available;
static gboolean dconf_access;
#ifdef G_PORTAL_SUPPORT_TEST
static const char *snapctl = "snapctl";
#else
static const char *snapctl = "/usr/bin/snapctl";
#endif
static gboolean
snap_plug_is_connected (const gchar *plug_name)
{
gint wait_status;
const gchar *argv[] = { snapctl, "is-connected", plug_name, NULL };
/* Bail out if our process is privileged - we don't want to pass those
* privileges to snapctl. It could be overridden and this would
* allow arbitrary code execution.
*/
if (GLIB_PRIVATE_CALL (g_check_setuid) ())
return FALSE;
if (!g_spawn_sync (NULL, (gchar **) argv, NULL,
#ifdef G_PORTAL_SUPPORT_TEST
G_SPAWN_SEARCH_PATH |
#endif
G_SPAWN_STDOUT_TO_DEV_NULL |
G_SPAWN_STDERR_TO_DEV_NULL,
NULL, NULL, NULL, NULL, &wait_status,
NULL))
return FALSE;
return g_spawn_check_wait_status (wait_status, NULL);
}
static void
sandbox_info_read (void)
{
static gsize sandbox_info_is_read = 0;
/* Sandbox type and Flatpak info is static, so only read once */
if (!g_once_init_enter (&sandbox_info_is_read))
return;
sandbox_type = glib_get_sandbox_type ();
switch (sandbox_type)
{
case G_SANDBOX_TYPE_FLATPAK:
{
GKeyFile *keyfile;
const char *keyfile_path = "/.flatpak-info";
use_portal = TRUE;
network_available = FALSE;
dconf_access = FALSE;
keyfile = g_key_file_new ();
#ifdef G_PORTAL_SUPPORT_TEST
char *test_key_file =
g_build_filename (g_get_user_runtime_dir (), keyfile_path, NULL);
keyfile_path = test_key_file;
#endif
if (g_key_file_load_from_file (keyfile, keyfile_path, G_KEY_FILE_NONE, NULL))
{
char **shared = NULL;
char *dconf_policy = NULL;
shared = g_key_file_get_string_list (keyfile, "Context", "shared", NULL, NULL);
if (shared)
{
network_available = g_strv_contains ((const char *const *) shared, "network");
g_strfreev (shared);
}
dconf_policy = g_key_file_get_string (keyfile, "Session Bus Policy", "ca.desrt.dconf", NULL);
if (dconf_policy)
{
if (strcmp (dconf_policy, "talk") == 0)
dconf_access = TRUE;
g_free (dconf_policy);
}
}
#ifdef G_PORTAL_SUPPORT_TEST
g_clear_pointer (&test_key_file, g_free);
#endif
g_key_file_unref (keyfile);
}
break;
case G_SANDBOX_TYPE_SNAP:
break;
case G_SANDBOX_TYPE_UNKNOWN:
{
const char *var;
var = g_getenv ("GTK_USE_PORTAL");
if (var && var[0] == '1')
use_portal = TRUE;
network_available = TRUE;
dconf_access = TRUE;
}
break;
}
g_once_init_leave (&sandbox_info_is_read, 1);
}
gboolean
glib_should_use_portal (void)
{
sandbox_info_read ();
if (sandbox_type == G_SANDBOX_TYPE_SNAP)
return snap_plug_is_connected ("desktop");
return use_portal;
}
gboolean
glib_network_available_in_sandbox (void)
{
sandbox_info_read ();
if (sandbox_type == G_SANDBOX_TYPE_SNAP)
{
/* FIXME: This is inefficient doing multiple calls to check connections.
* See https://github.com/snapcore/snapd/pull/12301 for a proposed
* improvement to snapd for this.
*/
return snap_plug_is_connected ("desktop") ||
snap_plug_is_connected ("network-status");
}
return network_available;
}
gboolean
glib_has_dconf_access_in_sandbox (void)
{
sandbox_info_read ();
if (sandbox_type == G_SANDBOX_TYPE_SNAP)
return snap_plug_is_connected ("gsettings");
return dconf_access;
}
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