Re: How to determine if program is running in QSHELL

[Terrence Enger <tenger@xxxxxxxxxxxxxxxx>]

This is not a solution; just posting here to save somebody else from
wasting time on what I thought was the obvious way.

The useless idea was to examine (in C programming terminology) argv[0].
Experimentation shows that its value is plain, unadorned LIBRARY/PROGRAM
from both calling mechanism.

Hope this (in a negative way) helps.
Terry.


On Thu, 2009-09-24 at 11:01 +1000, Simon Coulter wrote:
> Does any one have a better idea of how to determine beyond a shadow of  
> a doubt from within a program that it is running within the QSHELL  
> environment?
>
> I have a program that can run normally via the CALL command or within  
> QSH via a symbolic link. I want the default output to be different  
> depending on where it is running. I do not want the user to have to do  
> anything special external to the program. It must be transparent.
>
> My current thoughts are:
>
> 	o getppid() to locate the parent process ID
> 	o Qp0wGetJobID() to get qualified job name for the parent pid
> 	o if parent job name is QZSHSH then running in QSHELL
>
> I expect this will work as I want when the program is invoked from the  
> QSH command line but I think if it is used in a sequence of commands  
> via indirection (e.g., find -> grep -> mypgm -> something else) then I  
> think multiple jobs are spawned and the parent might not be QZSHSH.
>
> Ideas?
>
> Might be a few days before I get to address this issue again.
>
> Regards,
> Simon Coulter.
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