Function writevSync

lib/internal/vfs/setup.js:396–408

(fd, buffers, position)

      return totalRead;
    },
    writevSync(fd, buffers, position) {
      const vfd = getVirtualFd(fd);
      if (!vfd) return undefined;
      let totalWritten = 0;
      for (let i = 0; i < buffers.length; i++) {
        const buf = buffers[i];
        const pos = position != null ? position + totalWritten : position;
        const bytesWritten = vfd.entry.writeSync(buf, 0, buf.byteLength, pos);
        totalWritten += bytesWritten;
        if (bytesWritten < buf.byteLength) break;
      }
      return totalWritten;
    },

    // ==================== Async FD-based ops ====================