As others have mentioned, there's no direct way to do this, however, you could add an `.interactive` quasi-command to the command line parser if you really want to by modifying shell.c and building it yourself:
```
22295c22295,22297
< if( azCmd[i][0]=='.' ){
---
> if( strcmp(azCmd[i],".interactive")==0 ){
> readStdin=1;
> }else if( azCmd[i][0]=='.' ){
22316c22318,22319
< }else{
---
> }
> if( readStdin ){
```
Though, I don't know shell.c that well, there may be reasons this is a horrid idea.