source/interposer/interposer-safe.cpp

   1 /*
   2  * Carla Interposer for unsafe backend functions
   3  * Copyright (C) 2014-2022 Filipe Coelho <falktx@falktx.com>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of
   8  * the License, or any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * For a full copy of the GNU General Public License see the doc/GPL.txt file.
  16  */
  17
  18 #include "CarlaUtils.hpp"
  19
  20 #include <cerrno>
  21 #include <dlfcn.h>
  22 #include <sched.h>
  23 #include <spawn.h>
  24
  25 #define PREVENTED_FUNC_MSG carla_stderr2("Carla prevented a plugin from calling '%s', bad plugin!", __FUNCTION__)
  26
  27 // -----------------------------------------------------------------------
  28 // Gtk stuff
  29
  30 CARLA_PLUGIN_EXPORT void gtk_init(int*, char***);
  31 CARLA_PLUGIN_EXPORT int gtk_init_check(int*, char***);
  32 CARLA_PLUGIN_EXPORT int gtk_init_with_args(int*, char***, const char*, void*, const char*, void**);
  33
  34 // -----------------------------------------------------------------------
  35 // Our custom functions
  36
  37 CARLA_PLUGIN_EXPORT
  38 pid_t fork()
  39 {
  40     PREVENTED_FUNC_MSG;
  41     errno = ENOSYS;
  42     return -1;
  43 }
  44
  45 CARLA_PLUGIN_EXPORT
  46 int clone(int (*)(void*), void*, int, void*, ...)
  47 {
  48     PREVENTED_FUNC_MSG;
  49     errno = ENOSYS;
  50     return -1;
  51 }
  52
  53 CARLA_PLUGIN_EXPORT
  54 int posix_spawn(pid_t*, const char*, const posix_spawn_file_actions_t*, const posix_spawnattr_t*, char* const[], char* const[])
  55 {
  56     PREVENTED_FUNC_MSG;
  57     return ENOSYS;
  58 }
  59
  60 CARLA_PLUGIN_EXPORT
  61 int posix_spawnp(pid_t*, const char*, const posix_spawn_file_actions_t*, const posix_spawnattr_t*, char* const[], char* const[])
  62 {
  63     PREVENTED_FUNC_MSG;
  64     return ENOSYS;
  65 }
  66
  67 // -----------------------------------------------------------------------
  68
  69 CARLA_PLUGIN_EXPORT
  70 void exit(int status)
  71 {
  72     carla_stderr2("Carla prevented a plugin from calling 'exit', redirecting to '_exit' instead, bad plugin!");
  73     _exit(status);
  74 }
  75
  76 // -----------------------------------------------------------------------
  77
  78 CARLA_PLUGIN_EXPORT
  79 void gtk_init(int*, char***)
  80 {
  81     PREVENTED_FUNC_MSG;
  82 }
  83
  84 CARLA_PLUGIN_EXPORT
  85 int gtk_init_check(int*, char***)
  86 {
  87     PREVENTED_FUNC_MSG;
  88     return 0;
  89 }
  90
  91 CARLA_PLUGIN_EXPORT
  92 int gtk_init_with_args(int*, char***, const char*, void*, const char*, void**)
  93 {
  94     PREVENTED_FUNC_MSG;
  95     return 0;
  96 }
  97
  98 // -----------------------------------------------------------------------