#$EFFECTIVE_USER_ID

#$EUID

#$>

The effective uid of this process. Example:

$< = $>;		# set real to effective uid
($<,$>) = ($>,$<);	# swap real and effective uid

You can change both the effective uid and the real uid at the same time by using POSIX::setuid().

(Mnemonic: it's the uid you went to, if you're running setuid.) $< and $> can be swapped only on machines supporting setreuid().

development instance

GitHub issue tracker 🎃 DBOOK