Really weird bug

Really weird bug

[Bart Schaefer]

Where the heck is the string "fg" coming from here?

zagzig<69> for p in %h
> do echo "$p"
> done
fg
%h
zagzig<70> for p in "%h"
> do echo "$p"
> done
%h
zagzig<71>

-- 
Bart Schaefer                             Brass Lantern Enterprises
http://www.well.com/user/barts            http://www.nbn.com/people/lantern

New male in /home/schaefer:
>N  2 Justin William Schaefer  Sat May 11 03:43  53/4040  "Happy Birthday"

Re: Really weird bug

[Zefram]

>zagzig<69> for p in %h
>> do echo "$p"
>> done
>fg
>%h

Compare with:

% disable fg
% %1
zsh: command not found: fg

A bare job specification gets rewritten with fg, so can't be executed
if fg is disabled.  (()) math is similarly dependent on let.  I think
this is a bug, but it's not easy to fix.

As for why this rewriting is being applied after in, this is obviously
a separate bug.

-zefram

Re: Really weird bug

[Peter Stephenson]

schaefer@candle.brasslantern.com wrote:
> Where the heck is the string "fg" coming from here?
> 
> zagzig<69> for p in %h
> > do echo "$p"
> > done
> fg
> %h

*** Src/exec.c.fg	Thu Jul 11 14:41:32 1996
--- Src/exec.c	Fri Jul 12 13:47:26 1996
***************
*** 1122,1128 ****
  
      /* If the command begins with `%', then assume it is a *
       * reference to a job in the job table.                */
!     if (nonempty(args) && *(char *)peekfirst(args) == '%') {
  	pushnode(args, dupstring((how & Z_DISOWN)
  				 ? "disown" : (how & Z_ASYNC) ? "bg" : "fg"));
  	how = Z_SYNC;
--- 1122,1128 ----
  
      /* If the command begins with `%', then assume it is a *
       * reference to a job in the job table.                */
!     if (type == SIMPLE && nonempty(args) && *(char *)peekfirst(args) == '%') {
  	pushnode(args, dupstring((how & Z_DISOWN)
  				 ? "disown" : (how & Z_ASYNC) ? "bg" : "fg"));
  	how = Z_SYNC;

-- 
Peter Stephenson <pws@ifh.de>       Tel: +49 33762 77366
WWW:  http://www.ifh.de/~pws/       Fax: +49 33762 77330
Deutches Electronen-Synchrotron --- Institut fuer Hochenergiephysik Zeuthen
DESY-IfH, 15735 Zeuthen, Germany.

Re: Really weird bug

[Bart Schaefer]

On Jul 12,  9:32am, Zefram wrote:
} Subject: Re: Really weird bug
}
} A bare job specification gets rewritten with fg, so can't be executed
} if fg is disabled.  (()) math is similarly dependent on let.  I think
} this is a bug, but it's not easy to fix.

Recall my remarks of a couple of weeks ago about wanting a way to
access disabled reserved words?  This is exactly the sort of place
where it would be useful -- zsh could use it internally for rewrites.

-- 
Bart Schaefer                             Brass Lantern Enterprises
http://www.well.com/user/barts            http://www.nbn.com/people/lantern

New male in /home/schaefer:
>N  2 Justin William Schaefer  Sat May 11 03:43  53/4040  "Happy Birthday"