Method close

system/lib/wasmfs/special_files.cpp:146–146

class RandomFile : public DataFile {
  int open(oflags_t) override { return 0; }
  int close() override { return 0; }

  ssize_t write(const uint8_t* buf, size_t len, off_t offset) override {
    return -__WASI_ERRNO_INVAL;