Challenge: who can background this shell command?

David Bovill david.bovill at gmail.com
Fri Aug 2 09:13:38 EDT 2019


Yes - ^c to shut down... but why for update?

On Thu, 1 Aug 2019 at 19:27, Dar Scott Consulting via use-livecode <
use-livecode at lists.runrev.com> wrote:

> I am not familiar with hugo. Do you type a ^c to shut down hugo server? In
> that case you might want to consider open for update.
>
> > On Aug 1, 2019, at 12:19 PM, David Bovill via use-livecode <
> use-livecode at lists.runrev.com> wrote:
> >
> > OK - I managed to get it to work with:
> >
> >   - open process "/usr/local/bin/hugo server" for read
> >
> > which I did not think would work due to the two word shell command.
> >
> > Timing was an issue - so I had to use the method found here (thanks
> Mark) -
> >
> https://github.com/livecode/livecode/blob/develop/builder/installer_utilities.livecodescript
> > -
> > which uses a send in 20 milliseconds when there is a timeout. basically
> it
> > is complex timing logic, but more direct and probably robust than using a
> > bunch of shell commands we put into the background. Still we have tow
> > methods that work - restores my faith in the flexibility of Livecode!
> >
> > On Thu, 1 Aug 2019 at 17:15, dsc--- via use-livecode <
> > use-livecode at lists.runrev.com> wrote:
> >
> >> I feel foolish. From the dictionary:
> >>
> >>
> >> Note: On OS X systems, you can use the open process command to start up
> an
> >> application, but not a Unix process. To work with a Unix process, use
> the
> >> shell func instead.
> >>
> >> When I saw this in the Dictionary, I thought, "Oh, when did this break?"
> >>
> >> I should have thought, "Oh, yeah?"
> >>
> >>
> >>> On Aug 1, 2019, at 10:03 AM, Dar Scott Consulting via use-livecode <
> >> use-livecode at lists.runrev.com> wrote:
> >>>
> >>> So, this is a documentation problem?
> >>>
> >>>> On Aug 1, 2019, at 9:27 AM, Mark Waddingham via use-livecode <
> >> use-livecode at lists.runrev.com> wrote:
> >>>>
> >>>> On 2019-08-01 17:12, David Bovill via use-livecode wrote:
> >>>>> OK - so I have it working by writing to a temporary file.
> >>>>> Trying to redirect the output to stdout - so that shell() return the
> >>>>> information of the background process - but this freezes:
> >>>>
> >>>> Okay so given you want to read/write to the process you launched it
> >> seems...
> >>>>
> >>>> What's wrong with open process? The *only* difference between open
> >> process
> >>>> on macOS compared to Linux (and Windows) is that if you try and open
> >> process
> >>>> an app-bundle (i.e. something ending with '.app') it will do the same
> as
> >>>> launch (as .app bundles aren't executables).
> >>>>
> >>>> The installer uses open (elevated) process to communicate with an
> >> instance
> >>>> of itself with elevated permissions. You can see the code for that
> here:
> >>>>
> >>>> <
> >>
> https://github.com/livecode/livecode/blob/develop/builder/installer_utilities.livecodescript
> >>>
> >>>>
> >>>> The key routines are installerRun and installerMonitor (the latter is
> >> used
> >>>> to poll every 20 milliseconds to check if the child process has
> >> anything to
> >>>> say).
> >>>>
> >>>> Warmest Regards,
> >>>>
> >>>> Mark.
> >>>>
> >>>> --
> >>>> Mark Waddingham ~ mark at livecode.com ~ http://www.livecode.com/
> >>>> LiveCode: Everyone can create apps
> >>>>
> >>>> _______________________________________________
> >>>> use-livecode mailing list
> >>>> use-livecode at lists.runrev.com
> >>>> Please visit this url to subscribe, unsubscribe and manage your
> >> subscription preferences:
> >>>> http://lists.runrev.com/mailman/listinfo/use-livecode
> >>>>
> >>>
> >>>
> >>> _______________________________________________
> >>> use-livecode mailing list
> >>> use-livecode at lists.runrev.com
> >>> Please visit this url to subscribe, unsubscribe and manage your
> >> subscription preferences:
> >>> http://lists.runrev.com/mailman/listinfo/use-livecode
> >>
> >> _______________________________________________
> >> use-livecode mailing list
> >> use-livecode at lists.runrev.com
> >> Please visit this url to subscribe, unsubscribe and manage your
> >> subscription preferences:
> >> http://lists.runrev.com/mailman/listinfo/use-livecode
> >>
> > _______________________________________________
> > use-livecode mailing list
> > use-livecode at lists.runrev.com
> > Please visit this url to subscribe, unsubscribe and manage your
> subscription preferences:
> > http://lists.runrev.com/mailman/listinfo/use-livecode
>
>
> _______________________________________________
> use-livecode mailing list
> use-livecode at lists.runrev.com
> Please visit this url to subscribe, unsubscribe and manage your
> subscription preferences:
> http://lists.runrev.com/mailman/listinfo/use-livecode
>



More information about the Use-livecode mailing list