[GRASS5] Re: [GRASSLIST:787] bash scripts don't wait for grass

[Radim Blazek]

It seems that execlp() and _spawnlp ( _P_OVERLAY,..) realy does not
wait for the end of the new process (the current process is not replaced?)
_spawnlp ( _P_WAIT, ...) seems to work , I have put iit into CVS,
please test with the next build.

Radim

On 4/21/06, Radim Blazek <radim.blazek at gmail.com> wrote:
> The same problem appears on native port. It seems to be caused
> by execl() which creates a new process instead of replacing the
> current process.
> http://www.koders.com/c/fidBE86F115AFA6E74AB2C152B94B88C601A2CAEEE1.aspx
> #define P_WAIT          1
> #define P_NOWAIT        2       /* always generates error */
> #define P_OVERLAY       3
> int execl(const char *path, const char *argv0, ...)
> {
>   return spawnve(P_OVERLAY, path, &argv0, environ);
> }
>
> I think that spawnve with P_WAIT should help, I'll try it with the native port.
>
> Radim
>
>
> On 4/21/06, Luigi Ponti <lponti at infinito.it> wrote:
> > Hello,
> >
> > Maybe unrelated but I remember a similar question on the list.
> >
> > When I run a ~400 lines bash script to batch process more than just a
> > couple of files, the script kind of of gets tangled and stops before
> > processing the last file (it is basically v.in.ascii importing plus
> > v.rast.idw interpolating, and some Perl scripts), as if some overlapping
> > between child processes occurred.
> >
> > I tried with the "wait" bash command which should have fixed it, but it
> > still occurs. Is it a known issue? Or is it related to the fact that I
> > am running grass60 on cygwin?
> >
> > Any hints to make grass batch processing more reliable will be appreciated.
> >
> > Thanks,
> >
> > Luigi
> >
> >
>