Re: [Jed-users-l] slang function debugging?

[Ulli Horlacher <framstag@xxxxxxxxxxxxxxxxxxxx>]

On Tue 2013-06-04 (12:11), John E. Davis wrote:

> >   system(sprintf("vv -s %s >/dev/null",f));
> 
> The system function returns a value that your are not handling.  You
> can change the above to:
> 
>     () = system(sprintf("vv -s %s >/dev/null",f));

This eliminates the error

Unable to typecast Integer_Type to String_Type

but I do not understand why it has occured?
Ok, there is a value on the stack left, but why does ot harm?


> You might try using the process module to avoid escaping the filename:
> 
>    require ("process");
>    define make_backup_filename (dir, file)
>    {
>       variable f = path_concat (dir, file);
>       () = new_process(["vv", "-s", f]; stdout="/dev/null").wait();
>       return "";
>    }

I get an error:

framstag@fex:/sw/share/jedlib-0.99-19/lib: jed -batch
                                                  
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/site.slc
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/os.sl
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/menus.slc
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/defaults.sl
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/emacs.slc
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/edt.slc
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/regexp.slc
loading /sw/ubuntu-10.04/slang-2.2.4/share/slsh/require.sl
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/srchmisc.slc
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/keys.sl
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/keydefs.slc
loading /sw/ubuntu-10.04/jed-0.99-19/jed/lib/misc.slc
loading /sw/ubuntu-10.04/slang-2.2.4/share/slsh/process.sl
loading /sw/ubuntu-10.04/slang-2.2.4/share/slsh/fork.sl
loading /sw/ubuntu-10.04/slang-2.2.4/share/slsh/fcntl.sl
loading /sw/ubuntu-10.04/slang-2.2.4/share/slsh/sysconf.sl
pipe cannot be re-defined
/sw/ubuntu-10.04/jed-0.99-19/jed/lib/defaults.sl:779:<top-level>:Duplicate Definition
Traceback: evalfile
/sw/ubuntu-10.04/jed-0.99-19/jed/lib/site.sl:3304:<top-level>:Duplicate Definition


-- 
Ullrich Horlacher              Informationssysteme und Serverbetrieb
Rechenzentrum IZUS/TIK         E-Mail: horlacher@xxxxxxxxxxxxxxxxxxxx
Universitaet Stuttgart         Tel:    ++49-711-68565868
Allmandring 30a                Fax:    ++49-711-682357
70550 Stuttgart (Germany)      WWW:    http://www.tik.uni-stuttgart.de/
REF: <201306041611.r54GBVoo017982@xxxxxxxxxxxxxx>
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