bash - Press any key with timeout progress displayed in shell -

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i want provide user prompt press key or wait timeout continue using shell. case solved following idiom:

read -rs -t3 -n1 "press key or wait continue ..."

however prompt seems little bit clumsy me , left "press key continue ..." part of message , indicate timeout dots printed each second. write following script:

#!/bin/sh  echo -n "press key continue";  _ in `seq 3`;     if ! read -rs -n1 -t1 ; echo -n "."; else break; fi done  echo

it works expect, there code, have put in separate file instead of using sh -c "..." in script. there way implement in more concise , compact way?

p.s. returning non-zero error code on ctrl-c pressed must.

a bit more concise :

echo -n "press key continue"; _ in {1..3}; read -rs -n1 -t1 || printf ".";done;echo

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