/prog/ Challenge #1872 - Exploit slock

slock is a simple X display locker utility.

After invoking slock, the only way to get out of it is to enter your password.

The challenge: find a way to exploit it, so that the you get out of slock without knowing the victim's password.

The source code is less than 400 LOCs.
http://git.suckless.org/slock/tree/slock.c

Good luck.

>>16
Lisp adds real bloat, Abstraction Bloat. That is empirically verifiable and measurable.
C preprocessor only exist in compile time constructs and has no effect on performance of the C code that results from using it(zero-overhead).
The only cost of using C preprocessor is time/memory spent in preprocessing stage.