ash buildin "read" interrupted on SIGCHLD

[Guido Classen]

Hi,

I've observed some strange behavior in ash buildin "read" when
a SIGCHLD arrives in current busybox.

old behavior on busybox 1.24.2 ash (same behavior also on Debian bash and dash)

   sleep 1& read x
    => waits for ever until input is given

new behavior on busybox

  sleep 1& read x
   [1]+  Done                       sleep 1
   => read will be interrupted after one second due raise of SIGCHLD

I am not sure what is the right place to fix this. Any comment on this?
For me it works to suppress this signal on the corresponding poll() call.

Best,
  Guido