Method write

system/lib/wasmfs/pipe_backend.h:29–34

  int close() override { return 0; }

  ssize_t write(const uint8_t* buf, size_t len, off_t offset) override {
    for (size_t i = 0; i < len; i++) {
      data->push(buf[i]);
    }
    return len;
  }

  ssize_t read(uint8_t* buf, size_t len, off_t offset) override {
    for (size_t i = 0; i < len; i++) {