Function getUpdatedLdPreload

src/execwrappers.cpp:478–524

}

static string
getUpdatedLdPreload(const char *filename, const char *currLdPreload)
{
  string preload = getenv(ENV_VAR_HIJACK_LIBS);

  bool isElf = false;
  bool is32bitElf = false;

  if (getenv(ENV_VAR_HIJACK_LIBS_M32) != NULL &&
      // It should either be a valid script or a valid ELF executable
      (Util::getInterpreterType(filename, &isElf, &is32bitElf) != -1 ||
       Util::elfType(filename, &isElf, &is32bitElf) != -1) &&
      isElf &&
      is32bitElf) {
    preload = getenv(ENV_VAR_HIJACK_LIBS_M32);
  }

  vector<string>pluginLibraries = tokenizeString(preload, ":");
  for (size_t i = 0; i < pluginLibraries.size(); i++) {
    // If the plugin doesn't exist, try to search it in the current install
    // directory.
    if (!jalib::Filesystem::FileExists(pluginLibraries[i])) {
      pluginLibraries[i] =
        Util::getPath(jalib::Filesystem::BaseName(pluginLibraries[i]).c_str(),
                      is32bitElf);
    }
  }

  const char *preloadEnv = getenv("LD_PRELOAD");
  if (currLdPreload != NULL && strlen(currLdPreload) > 0) {
    pluginLibraries.push_back(currLdPreload);
    setenv(ENV_VAR_ORIG_LD_PRELOAD, currLdPreload, 1);
  } else if (preloadEnv != NULL && strlen(preloadEnv) > 0) {
    pluginLibraries.push_back(preloadEnv);
    setenv(ENV_VAR_ORIG_LD_PRELOAD, preloadEnv, 1);
  }

  string newPreload;
  if (pluginLibraries.size() > 0) {
    newPreload = pluginLibraries[0];
    for (size_t i = 1; i < pluginLibraries.size(); i++) {
      newPreload += ":" + pluginLibraries[i];
    }
  }

  return newPreload;
}

static vector<string>
copyEnv(char *const envp[])