Function sysp_wait 

#[unsafe(no_mangle)]
pub extern "C" fn sysp_wait(
    pid: Pid,
    exit_code: OptionalPtrMut<usize>,
) -> SyscallResult

Waits for a child process with the pid pid to exit

Returns

• ErrorStatus::InvalidPid if the target process doesn’t exist at the time of wait

• ErrorStatus::MissingPermissions if the target process isn’t a child of self

• if exit_code is not null, it will be set to the exit code of the process if successful