shell脚本

   最近在看《高级bash脚本编程指南》，为防止遗忘，把自己在该书上联系的脚本贴上来。。。

read定时


#/bin/bash
#t-out.sh

TIMELIMIT=4

read -t $TIMELIMIT variable

echo

if [ -z "$variable" ]
then
  echo "Time out,variable still unset."
else
  echo "variable=$variable"
fi

exit 0