Function rt_sigaction_raw 

pub unsafe fn rt_sigaction_raw(
    signo: i32,
    new_action: *const sigaction,
    old_action: *mut sigaction,
    sigsetsize: usize,
) -> Result<(), Errno>

Calls the rt_sigaction syscall.

Safety

• new_action must be safe to dereference.
• old_action must be safe to write to. (uninitd is ok).
• new_action’s handler must be safe to call as a signal handler. See signal-safety(7).
• Generally, new_action must have SA_RESTORER set and a suitable restorer, such as sigaction_restorer. (There might be some esoteric way to call this syscall without this property, but I’m not aware of one).