Subject: Re: [ast-users] typeset -r COLUMNS # triggers endless loop...
--------
> $ typeset -r COLUMNS
> ... locks the shell in an endless loop which prints:
> -- snip --
> $ ksh93: COLUMNS: is read only
> $ ksh93: COLUMNS: is read only
> $ ksh93: COLUMNS: is read only
> $ ksh93: COLUMNS: is read only
> $ ksh93: COLUMNS: is read only
> $ ksh93: COLUMNS: is read only
> -- snip --
> etc.
>
> AFAIK the expected behaviour may be that the "set" discipline method for
> "COLUMNS"+"LINES" stops setting these variables if they are marked as
> read-only... or am I wrong ?
>
>
This is a bug. Here is a context diff for a fix.
*** old/sh/fault.c Fri Nov 30 14:46:01 2007
--- newsh/fault.c Thu Mar 6 08:58:05 2008
***************
*** 56,64 ****
int32_t v;
astwinsize(2,&rows,&cols);
if(v = cols)
! nv_putval(COLUMNS, (char*)&v, NV_INT32);
if(v = rows)
! nv_putval(LINES, (char*)&v, NV_INT32);
}
#endif /* SIGWINCH */
if(shp->savesig)
--- 56,64 ----
int32_t v;
astwinsize(2,&rows,&cols);
if(v = cols)
! nv_putval(COLUMNS, (char*)&v, NV_INT32|NV_RDONLY);
if(v = rows)
! nv_putval(LINES, (char*)&v, NV_INT32|NV_RDONLY);
}
#endif /* SIGWINCH */
if(shp->savesig)
David Korn
[EMAIL PROTECTED]
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