C++ (Cpp) print_app_name_from_uid примеры использования

Пример #1

Файл: stubs.cpp Проект: AsteroidOS/android_bionic

// Translate a uid into the corresponding name.
// 0 to AID_APP-1                   -> "system", "radio", etc.
// AID_APP to AID_ISOLATED_START-1  -> u0_a1234
// AID_ISOLATED_START to AID_USER-1 -> u0_i1234
// AID_USER+                        -> u1_radio, u1_a1234, u2_i1234, etc.
// returns a passwd structure (sets errno to ENOENT on failure).
static passwd* app_id_to_passwd(uid_t uid, passwd_state_t* state) {
  if (uid < AID_APP) {
    errno = ENOENT;
    return NULL;
  }

  print_app_name_from_uid(uid, state->name_buffer_, sizeof(state->name_buffer_));

  const uid_t appid = uid % AID_USER;
  if (appid < AID_APP) {
      snprintf(state->dir_buffer_, sizeof(state->dir_buffer_), "/");
  } else {
      snprintf(state->dir_buffer_, sizeof(state->dir_buffer_), "/data");
  }

  snprintf(state->sh_buffer_, sizeof(state->sh_buffer_), "/system/bin/sh");

  passwd* pw = &state->passwd_;
  pw->pw_name  = state->name_buffer_;
  pw->pw_dir   = state->dir_buffer_;
  pw->pw_shell = state->sh_buffer_;
  pw->pw_uid   = uid;
  pw->pw_gid   = uid;
  return pw;
}

Пример #2

Файл: stubs.cpp Проект: binbian9/platform_bionic

// Translate a gid into the corresponding app_<gid>
// group structure (sets errno to ENOENT on failure).
static group* app_id_to_group(gid_t gid, stubs_state_t* state) {
  if (gid < AID_APP) {
    errno = ENOENT;
    return NULL;
  }

  print_app_name_from_uid(gid, state->group_name_buffer_,
                          sizeof(state->group_name_buffer_));

  group* gr = &state->group_;
  gr->gr_name   = state->group_name_buffer_;
  gr->gr_gid    = gid;
  gr->gr_mem[0] = gr->gr_name;
  gr->gr_mem[1] = NULL;
  return gr;
}