Thanks to you all monks, named or unnamed ones.
I putted the pieces togheter and this was the result (ugly code I know, the command parsing over other things):
#!perl
use strict;
use warnings;
use if ($^O eq 'MSWin32'), 'Win32::Getppid';
my $parent;
my $invoker;
BEGIN{
if ($^O eq 'MSWin32') {
$parent = getppid;
open my $cmd,"tasklist /nh /FI \"PID eq $parent\" |" or die;
while (<$cmd>){
chomp;
next if /^$/;# yes it outputs a leading empty line..
$invoker = $1 if /^([\w\d\.]+)\W/;
}
}
else {
$parent = getppid;
open my $cmd,"ps -p $parent|" or die;
while (<$cmd>){
chomp;
next if /^[\sA-Z]+$/;# get rid of heaader: freebsd does no
+t support no header output
$invoker = $1 if /\s([\w\d\.]+)$/;
}
}
}
print "Perl (PID $$) was invoked from PID $parent ($invoker)\n";
It outputs the correct thing in 3 different test cases:
cmd.exe>perl who_called_Perl.pl
Perl (PID 17400) was invoked from PID 10576 (cmd.exe)
powershell> perl.exe who_called_Perl.pl
Perl (PID 18212) was invoked from PID 11272 (powershell.exe)
bash$ perl who_called_perl.pl
Perl (PID 73288) was invoked from PID 31994 (bash)
L*
There are no rules, there are no thumbs..
Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.
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