Avoid ignore_interrupts in safe_fork.

Library/Homebrew/utils/fork.rb

@@ -75,11 +75,13 @@ module Utils
           exit!(true)
         end
 
-        ignore_interrupts(quiet: true) do # the child will receive the interrupt and marshal it back
+        pid = T.must(pid)
+
+        begin
           begin
             socket = server.accept_nonblock
           rescue Errno::EAGAIN, Errno::EWOULDBLOCK, Errno::ECONNABORTED, Errno::EPROTO, Errno::EINTR
-            retry unless Process.waitpid(T.must(pid), Process::WNOHANG)
+            retry unless Process.waitpid(pid, Process::WNOHANG)
           else
             socket.send_io(write)
             socket.close
@@ -87,12 +89,14 @@ module Utils
           write.close
           data = read.read
           read.close
-          Process.wait(T.must(pid)) unless socket.nil?
+          Process.waitpid(pid) unless socket.nil?
+        rescue Interrupt
+          Process.waitpid(pid)
+        end
 
         # 130 is the exit status for a process interrupted via Ctrl-C.
-          # We handle it here because of the possibility of an interrupted process terminating
-          # without writing its Interrupt exception to the error pipe.
         raise Interrupt if $CHILD_STATUS.exitstatus == 130
+        raise Interrupt if $CHILD_STATUS.termsig == Signal.list["INT"]
 
         if data.present?
           error_hash = JSON.parse(T.must(data.lines.first))
@@ -107,4 +111,3 @@ module Utils
     end
   end
 end
-end