Shell Programming Basics of Select Exercise

First, the grammar

Select inch con1 con2 con3    # automatically lists Con1,con2,con3 's selection menu do     #执行内容break    # Select itself is a loop, Break is when you choose to jump out of the loop done 

Second, practice

1. Select + Case Emulation Linux startup script
   

   functionProgramstatus () {if[" $"-eq0]; Then    Echo "* Program is running"  Else    Echo "* program has stopped"  fi}status=0#0: Start;1: StopSelectPinch "Start" "Stop" "Status" "Restart" "*" "" Do Case "$p" inch"Start") Status=0programstatus $status;;"Stop") Status=1programstatus $status;;"Status") programstatus $status;;"Restart")  if["$status"-eq0]; ThenStatus=1    Echo "* program has stopped"  fiStatus=0  Echo "* Program is running"  ;;"") break;;*)  Echo "Plz input [Start|stop|status|restart]"   ;;Esac Done

    [email protected]:~$./test. sh  1  ) start  2  ) stop  3   Status  4  ) restart  5  ) # ? 1  * program is running# ? 2  * program has stopped# ? 3  * program has stopped# ? 4  * program is running# ? 5  [email protected]:  ~$ 

Shell Programming Basics of Select Exercise