zsh function does dot get back in foreground

zsh function does dot get back in foreground

[Pol]

I am using the function 

m () {
        $PAGER $PAGEROPTS $*
}


to view files.
As i view single files, it is ok, but as i use that fuction to view the
'diff' command out put, e.g.:
  
% diff file1 file2 |m 

i cannot recover the output after the 'm' function has been put in the 
beckground. 
Entering 
% fg
seems to reget 'm' in foreground, but 'diff' out is not displayed on
terminal any more. 
The only way out is to kill 'm'.

If 'more' or 'less' is used instead, everything is ok.

What is wrong?

thank you 

--
Pol

Re: zsh function does dot get back in foreground

[Peter Stephenson]

Pol wrote:
> I am using the function 
> 
> m () {
>         $PAGER $PAGEROPTS $*
> }
> 
> 
> to view files.
> As i view single files, it is ok, but as i use that fuction to view the
> 'diff' command out put, e.g.:
>   
> % diff file1 file2 |m 
> 
> i cannot recover the output after the 'm' function has been put in the 
> beckground. 

Hmm... putting a function into the background does require some tricky
code inside the shell, but your function seems to work for me on
pipelines on zsh 4.1.1-dev-1.  What version are you using?  Do you have
any even marginally relevant options set?

-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 692070



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Re: zsh function does dot get back in foreground

[Geoff Wing]

Peter Stephenson <pws@csr.com> typed:
:> i cannot recover the output after the 'm' function has been put in the 
:> beckground. 
: Hmm... putting a function into the background does require some tricky
: code inside the shell, but your function seems to work for me on
: pipelines on zsh 4.1.1-dev-1.  What version are you using?  Do you have
: any even marginally relevant options set?

For me, the pager gets a TTIN or TTOU or similar.  So fg'ing it puts
a stopped task in the foreground.  A simple CONT gets everything going.
Don't know whether that's necessarily appropriate for all backgrounded
tasks put into the foreground.

Regards,
Geoff