const-ify

bind ? to spawn `man fm'

zero the whole argv array to avoid surprises

rewrite spawn to use varargs it's seems neater than packing an array on the spot, we just do that inside spawn before calling execvp. If we get too many arguments, just abort. This also changes how the forking is handled: I set RVSEL only for the child and call disable_handlers() and endwin() preemptively to avoid possible races with our children.

starting to rewrite the input loop

pedantic prototypes

const-ify message fmt string

typo

mark message as printf-like

parenthesize sizeof

add x{m,c,re}alloc functions is easier this way than edit the existing code to handle malloc(3) failures.

de-typedef-ify pt2

rename rover -> fm

de-typedef-ify

drop unnecessary #define