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/*
* Copyright (C) 2014-2018 Firejail Authors
*
* This file is part of firejail project
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "firejail.h"
void dbus_session_disable(void) {
if (!checkcfg(CFG_DBUS)) {
fwarning("D-Bus handling is disabled in Firejail configuration file\n");
return;
}
char *path;
if (asprintf(&path, "/run/user/%d/bus", getuid()) == -1)
errExit("asprintf");
char *env_var;
if (asprintf(&env_var, "DBUS_SESSION_BUS_ADDRESS=unix:path=%s", path) == -1)
errExit("asprintf");
// set a new environment variable: DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/<UID>/bus
if (setenv("DBUS_SESSION_BUS_ADDRESS", env_var, 1) == -1) {
fprintf(stderr, "Error: cannot modify DBUS_SESSION_BUS_ADDRESS required by --nodbus\n");
exit(1);
}
// blacklist the path
disable_file_or_dir(path);
free(path);
free(env_var);
// look for a possible abstract unix socket
// --net=none
if (arg_nonetwork)
return;
// --net=eth0
if (any_bridge_configured())
return;
// --protocol=unix
#ifdef HAVE_SECCOMP
if (cfg.protocol && !strstr(cfg.protocol, "unix"))
return;
#endif
fwarning("An abstract unix socket for session D-BUS might still be available. Use --net or remove unix from --protocol set.\n");
}
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