Re: How get last commnda history line number directly

[L A Walsh]

On 9/8/2020 5:11 AM, Greg Wooledge wrote:
> On Sun, Sep 06, 2020 at 01:18:22PM -0700, L A Walsh wrote:
>   
> > > as it's pure & directly viable in PS1 env. var.
> > > PS1=`echo \!`
> > >       
> > ---
> > Doesn't work if you don't have '!' support (I generally found
> > '!' more often did unwanted things, but I never used csh):
> >     
>
> You're talking abuot csh-style history expansion (set -o histexpand),
> right?  That has nothing to do with the expansion of \! within PS1.
>
> I've got histexpand disabled, and PS1='\! ' gives the number just fine.
>   
Like this?
# t='\! '
# echo $t
\!
---
As I said, doesn't work if you don't have '!' support.