Post to the readyness fd for EOF

When we get to the EOF on stdin, we need account for that
with the readiness fd. Post to it upon the EOF transition.
Closes #2525.

src/lib/in.c

@@ -476,6 +476,9 @@ mark_pipe_ready(ipipe pipes[static 2]){
   }
 }
 
+// shove the assembled input |tni| into the input queue (if there's room,
+// and we're not draining, and we haven't hit EOF). send any synthesized
+// signal as the last thing we do.
 static void
 load_ncinput(inputctx* ictx, const ncinput *tni, int synthsig){
   inc_input_events(ictx);
@@ -500,6 +503,8 @@ load_ncinput(inputctx* ictx, const ncinput *tni, int synthsig){
     ictx->iwrite = 0;
   }
   ++ictx->ivalid;
+  // FIXME we don't always need to write here; write if ictx->ivalid was 0, and
+  // also write *from the client context* if we empty the input buffer there..?
   mark_pipe_ready(ictx->readypipes);
   pthread_mutex_unlock(&ictx->ilock);
   pthread_cond_broadcast(&ictx->icond);
@@ -2290,8 +2295,13 @@ read_inputs_nblock(inputctx* ictx){
   // now read bulk, possibly with term escapes intermingled within (if there
   // was not a distinct terminal source).
   if(rifd){
+    unsigned eof = ictx->stdineof;
     read_input_nblock(ictx->stdinfd, ictx->ibuf, sizeof(ictx->ibuf),
                       &ictx->ibufvalid, &ictx->stdineof);
+    if(!eof && ictx->stdineof){
+      // we hit EOF; write an event to the readiness fd
+      mark_pipe_ready(ictx->readypipes);
+    }
   }
 }
 

src/poc/cli1.c

@@ -32,7 +32,7 @@ int main(void){
 #endif
       notcurses_get_blocking(nc, &ni);
     }while(ni.evtype == NCTYPE_RELEASE);
-  }while(ni.id != 'q');
+  }while(ni.id != 'q' && ni.id != NCKEY_EOF);
   if(notcurses_render(nc)){
     goto err;
   }