Carla/source/interposer/interposer-safe.cpp

/*
 * Carla Interposer for unsafe backend functions
 * Copyright (C) 2014-2022 Filipe Coelho <falktx@falktx.com>
 *
 * 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 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.
 *
 * For a full copy of the GNU General Public License see the doc/GPL.txt file.
 */

#include "CarlaUtils.hpp"

#include <cerrno>
#include <dlfcn.h>
#include <sched.h>
#include <spawn.h>

#define PREVENTED_FUNC_MSG carla_stderr2("Carla prevented a plugin from calling '%s', bad plugin!", __FUNCTION__)

// -----------------------------------------------------------------------
// Gtk stuff

CARLA_PLUGIN_EXPORT void gtk_init(int*, char***);
CARLA_PLUGIN_EXPORT int gtk_init_check(int*, char***);
CARLA_PLUGIN_EXPORT int gtk_init_with_args(int*, char***, const char*, void*, const char*, void**);

// -----------------------------------------------------------------------
// Our custom functions

CARLA_PLUGIN_EXPORT
pid_t fork()
{
    PREVENTED_FUNC_MSG;
    errno = ENOSYS;
    return -1;
}

CARLA_PLUGIN_EXPORT
int clone(int (*)(void*), void*, int, void*, ...)
{
    PREVENTED_FUNC_MSG;
    errno = ENOSYS;
    return -1;
}

CARLA_PLUGIN_EXPORT
int posix_spawn(pid_t*, const char*, const posix_spawn_file_actions_t*, const posix_spawnattr_t*, char* const[], char* const[])
{
    PREVENTED_FUNC_MSG;
    return ENOSYS;
}

CARLA_PLUGIN_EXPORT
int posix_spawnp(pid_t*, const char*, const posix_spawn_file_actions_t*, const posix_spawnattr_t*, char* const[], char* const[])
{
    PREVENTED_FUNC_MSG;
    return ENOSYS;
}

// -----------------------------------------------------------------------

CARLA_PLUGIN_EXPORT
void exit(int status)
{
    carla_stderr2("Carla prevented a plugin from calling 'exit', redirecting to '_exit' instead, bad plugin!");
    _exit(status);
}

// -----------------------------------------------------------------------

CARLA_PLUGIN_EXPORT
void gtk_init(int*, char***)
{
    PREVENTED_FUNC_MSG;
}

CARLA_PLUGIN_EXPORT
int gtk_init_check(int*, char***)
{
    PREVENTED_FUNC_MSG;
    return 0;
}

CARLA_PLUGIN_EXPORT
int gtk_init_with_args(int*, char***, const char*, void*, const char*, void**)
{
    PREVENTED_FUNC_MSG;
    return 0;
}

// -----------------------------------------------------------------------