Function Java_java_lang_Runtime_exec

classpath/java-lang.cpp:379–474

}

extern "C" JNIEXPORT void JNICALL
    Java_java_lang_Runtime_exec(JNIEnv* e,
                                jclass,
                                jobjectArray command,
                                jlongArray process)
{
#if !defined(WINAPI_FAMILY) || WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
  int size = 0;
  for (int i = 0; i < e->GetArrayLength(command); ++i) {
    jstring element = (jstring)e->GetObjectArrayElement(command, i);
    if (element) {
      // worst case, assuming every character is '"', and we escape all of them
      size += 2 * e->GetStringUTFLength(element) + 3;
    } else {
      throwNew(e,
               "java/lang/NullPointerException",
               strdup("null string array element"));
    }
  }

  RUNTIME_ARRAY(char, line, size);
  char* linep = RUNTIME_ARRAY_BODY(line);
  for (int i = 0; i < e->GetArrayLength(command); ++i) {
    if (i)
      *(linep++) = _T(' ');
    jstring element = (jstring)e->GetObjectArrayElement(command, i);
    const char* s = e->GetStringUTFChars(element, 0);

    copyAndEscape(&linep, s, e->GetStringUTFLength(element));

    e->ReleaseStringUTFChars(element, s);
  }
  *(linep++) = _T('\0');

  HANDLE in[] = {0, 0};
  HANDLE out[] = {0, 0};
  HANDLE err[] = {0, 0};

  makePipe(e, in);
  SetHandleInformation(in[0], HANDLE_FLAG_INHERIT, 0);
  jlong inDescriptor = static_cast<jlong>(descriptor(e, in[0]));
  if (e->ExceptionCheck())
    return;
  e->SetLongArrayRegion(process, 2, 1, &inDescriptor);
  makePipe(e, out);
  SetHandleInformation(out[1], HANDLE_FLAG_INHERIT, 0);
  jlong outDescriptor = static_cast<jlong>(descriptor(e, out[1]));
  if (e->ExceptionCheck())
    return;
  e->SetLongArrayRegion(process, 3, 1, &outDescriptor);
  makePipe(e, err);
  SetHandleInformation(err[0], HANDLE_FLAG_INHERIT, 0);
  jlong errDescriptor = static_cast<jlong>(descriptor(e, err[0]));
  if (e->ExceptionCheck())
    return;
  e->SetLongArrayRegion(process, 4, 1, &errDescriptor);

  PROCESS_INFORMATION pi;