Re: pgid of spawned processes

[Rakesh Sharma]

You may want to restrict the extent of the env to the make (+ it's children) 
rather than the whole bash script, with the following:


              ROOT_PID="$$"    make  -f    yourmakefile    yourtarget


--Rakesh


________________________________
From: Jonathan Leonard <address@hidden>
Sent: Sunday, November 6, 2016 2:27 PM
To: Rakesh Sharma
Cc: address@hidden
Subject: Re: pgid of spawned processes

Thanks for the nudge in the right direction but...

... an easier way to make that happen is to introduce an initial bash script:

#!/bin/bash
export ROOT_PID=$$
make -f yourmakefile yourtarget

[This will set the bash script's PID into the env of all descendants (which is 
good enough for our purposes here as the make process itself needn't be the 
actual root)].

--Jonathan


On Sun, Nov 6, 2016 at 7:23 AM, Rakesh Sharma 
<address@hidden<mailto:address@hidden>> wrote:

The environment is passed on to it's child processes by make, so if you can 
find a way to push the pid of your make run into one then you're done.


a) Invoke make as follows:

tmpf=`mktemp`

TMPF="$tmpf" make -f yourmakefile yourtarget &

pid=$!

echo "$pid" > $tmpf

wait "$pid"

rm -f "$tmpf"


b) Inside yourmakefile:

export MAKE_PID := $(shell while [  !  -s "$(TMPF)"  ]; do :; done; cat < 
$(TMPF))


###

Now all child(s) of this make shall inherit the env $(MAKE_PID)


--Rakesh


________________________________
From: Help-make <address@hidden<mailto:address@hidden>> on behalf of Jonathan 
Leonard <address@hidden<mailto:address@hidden>>
Sent: Saturday, November 5, 2016 2:11 PM
To: address@hidden<mailto:address@hidden>
Subject: pgid of spawned processes

Hi,

Is it possible to get make to pass on its process group id to any children
processes it spawns?

[Please 'reply all' as I am not subscribed to this group].

Thanks!
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