My question is stated in the title:
How can I discover whether my program is being execute manually or by cron or from another script, and what account is being used?
I hope you guys can help me.
You can get the parent PID with getppid.
Then finding the parent process name from its PID is non-portable. On linux/unix you could run the ps command and parse the output. On Windows you'll probably need something like Win32::Process::List. No idea for OSX or other operating systems, try Googling perl get process name from pid.
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