shell() question

Mark Waddingham mark at livecode.com
Thu Jul 23 14:33:06 CEST 2015


The shell function inherits its environment from LC so there's no issue here.

You can also use open process for update, write to it then read from it.

The elevated version of open process prompts for authentication and then runs the process as administrator. It uses system support for UI based prompting - it works well on windows and Mac (which have builtin support), Linux support is a little more patchy as it requires gksu (iirc) to work.

Sent from my iPhone

> On 23 Jul 2015, at 08:28, David Bovill <david at viral.academy> wrote:
> 
> Well I found one - though I'm not sure it is strictly legal:
> 
>  put "<some text" into $LIVECODEVAR
>>  put shell ("echo $LIVECODEVAR | shellThing -q")
> 
> which is great. I don't "think" this pollutes the environment, as AFAIK
> shell() is in it's own space (like opening a tab in the terminal) - but are
> there any issues?
> 
> I'd like to try writing to a process - as I think you can do the equivalent
> of shell with a commandline tool. Does anyone have an example - and can
> explain "elevated" process - the docs are a bit sparse. Is elevated like
> sudo?
> 
> 
>> On 23 July 2015 at 08:18, David Bovill <david at viral.academy> wrote:
>> 
>> I'm wandering if there is a neat trick to pass data to a shell command via
>> STDIN. The only thing I know how to do is either:
>> 
>>   1. Write a bash script that accepts an input param and call this
>>   2. put shell ("echo 'some text' | shellThing")
>> 
>> Is there a neater way?
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