local a=...local b={}a.signal=b;function b.sigsend(c,d)if d<0 or d>256 then error("EINVAL")end;local e=a.tasks[tostring(c)]if not e then error("ENOENT")end;if not e.sigq then return end;e.sigq[#e.sigq+1]=d end;function b.sigcatch(f)local e=a.currentTask;e.sigh=f;if not e.sigq then e.sigq={}end;local g={error="",active=true}if e.sigd then e.sigd.active=false end;e.sigd=g;return g end;function b.sigignore()local e=a.currentTask;e.sigh=nil;e.sigq=nil;if e.sigd then e.sigd.active=false end;e.sigd=nil end;local h=a.syscalls;h["sigsend"]=b.sigsend;h["sigcatch"]=b.sigcatch;h["sigignore"]=b.sigignore