[fpc-pascal] TProcess questions

[Michael Van Canneyt]

On Tue, 3 Oct 2006, Adrian Maier wrote:

> On 10/3/06, Michael Van Canneyt <michael at freepascal.org> wrote:
> > > Any idea how should i quote the arguments so that they would be properly
> > > treated by TProcess?
> >
> > You can't. The following lines (line 107 of unix/process.inc)
> > Result:=StringReplace(Result,'"','',[rfReplaceAll]);
> > Result:=StringReplace(Result,'''','',[rfReplaceAll]);
> > Will strip all quotes inside a quoted string.
> >
> > Obviously, this is a bug.
> 
> It's a painful one.  I was hoping to switch to TProcess instead of shell (
> which isn't  cross-platform )  ...

The bug won't occur on windows :)

I will see about fixing it. Could you please post a bug report so it won't
be forgotten.

> 
> 
> > > 2.  Where is the TProcess documented on the freepascal website?
> 
> Michael, Vincent ,
> Thanks for the links for TProcess docs .   :-)
> 
> > > 3.  The code returned by the called program can be got with
> > > TProcess.ExitCode , right ?   I have a situation in which a program  1
> > > , but  TProcess.ExitCode is 0.   Therefore it's impossible to detect
> > > the failure.
> >
> > That can be if the program exited because of a signal.
> 
> I'm not sure if this was the case - I'll have to investigate.
> Anyway, is it possible to detect this situation ?

Well, first of all you should do a 'IsRunning' (or running) before checking 
the exitcode. Only after that you can check the exit code. About the
signalling, we'd need to extend TProcess for that.

Michael.