In principle, get your parent process id. (getppid) then interrogate that. On UNIX you can use Proc::ProcessTable or walk the /proc directory tree.
Example for Linux:
use warnings;
use strict;

my $ppid = getppid();

open (my $cmdfh, '<', "/proc/$ppid/cmdline") or die "Unable to open pp
+id cmdline: $!";

my $cmdline = <$cmdfh>;
close $cmdfh;

if ($cmdline =~ /bash|ksh|csh/) {
    print "Started by a shell\n";
}
elsif ($cmdline =~ /perl/) {
    print "Perl is the daddy\n";
}
else {
    print "I was created by: $cmdline\n";
}

[download]
On Windows it is not so easy. For some reason getppid is not implemented although there are Win32 API calls which will give details of the parent process based around CreateToolhelp32Snapshot() API.

In reply to Re: How Was My Script Run? by cdarke
in thread How Was My Script Run? by HalNineThousand

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