#! /bin/sh -record_file=passwdadd_file=adddelete_file=deletea="你的選擇是:"b="輸入關(guān)鍵字是:"clearwhile truedo   echo "      用戶信息主菜單     "   echo "1.打印當(dāng)前所所有記錄   "   echo "2.打印當(dāng)前所所有記錄(格式化后)"   echo "3.打印用戶名和用戶ID"   echo "4.打印(格式化了的)用戶名和擁用戶ID"   echo "5.查詢特定記錄"   echo "6.增加新記錄"   echo "7.刪除記錄?"   echo "q.---退出"   echo "你的選擇是:(等待用戶輸入)"   echo   read choice   echo "$a $choice"   case $choice in        1)tr -s "[:]" "[ ]"<$record_file;;        2)sort -k 1 $record_file|tr -s "[:]" "[\t]";;        3)awk -F : '{print $1 "," $3}'  $record_file;;          4)awk -F : '{print $1 "\t" $3}'  $record_file|sort -k 1;;        5)               while true do          echo "請輸入要查詢的用戶名:"               read answer                       echo "$b $answer"            if  (test -z "$answer")		then              echo "你還沒有輸入"    continue               elif            (test         awk -F : '{print $1}' $record_file|grep -qiw  $answer) #-i 不區(qū)分大小寫-w            then              awk -F : '$1=="'$answer'"{print $0}' $record_file           break           else             echo "你輸入的用戶不存在,沒有找到 $answer"                         break           fidone  ;;      6)source $add_file;;        7)source $delete_file;;        q)exit;;        Q)exit;;        *)echo "無效的代碼";;   esac   echo "請按回車?yán)^續(xù)... "   read answerdone