今天写的shell脚本，主要是对输入参数检验

usage()
{
  echo "\nUSAGE:\n"
  echo "PmActivityReport.sh\t-type\t<latency|activity>\t\t\t(Mandatory)\t/*Report type.*/\n"
  echo "\t\t\t-ne\t<RNC-IN|RNC-AN|RNC-CN|BTS|ALL>\t\t(Optional)\t/*Ne type.*/\n"
  echo "\t\t\t-from\t<YYYY/MM/DD-HH:00>\t\t\t(Optional)\t/*Begin time.*/\n"
  echo "\t\t\t-to\t<YYYY/MM/DD-HH:00>\t\t\t(Optional)\t/*End time.*/\n"
  echo "\t\t\t-o\t<>\t\t\t\t\t(Optional)\t/*Output file name.*/\n"
  echo "\nNOTE:\n"
  echo "The default value of the ne type is \"ALL\"."
  echo "The default value of the output file name is \"latencyReport.txt\" or \"activityReport.txt\", depending on the report type."
  echo "Time must be given in a strict format: YYYY/MM/DD-HH:MM. Only full time is allowed, and the minutes can not be set different from \"00\".\n"
}

if [ $# -lt 2 ]
then
  usage
else
  reportType="UNKNOWN"
  neType="ALL"
  fromTime="UNKNOWN"
  toTime="UNKNOWN"
  output="UNKNOWN"
  totalPara=$#
  para=1
  paraIsValid=1
  while [ $para -le $totalPara ]
  do
  case "$1" in
    -type)
         if [ "$2" = "latency" -o "$2" = "activity" ]
         then
           reportType=$2
         else
           echo "Wrong parameter for -type!"
           paraIsValid=0
         fi
         ;;
   
    -ne)
         if [ "$2" = "RNC-IN" -o "$2" = "RNC-AN" -o "$2" = "RNC-CN" -o "$2" = "BTS" -o "$2" = "ALL" ]
         then
           neType=$2
         else
           echo "Wrong parameter for -ne!"
           paraIsValid=0
         fi
         ;;
   
    -from)
         timeIsValid=`echo $2 | grep -c [0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9]-[0-9][0-9]:00$`
         if [ $timeIsValid -eq 1 ]
         then
           Year=`echo $2 | cut -c1-4`
           Month=`echo $2 | cut -c6-7`
           Day=`echo $2 | cut -c9-10`
           Hour=`echo $2 | cut -c12-13`
           if [ $Month -ge 13 ]
           then
             echo "Wrong parameter for -from! Please check the month."
             timeIsValid=0
           fi
           if [ $Day -ge 32 ]
           then
             echo "Wrong parameter for -from! Please check the day."
             timeIsValid=0
           fi
           if [ $Hour -ge 25 ]
           then
             echo "Wrong parameter for -from! Please check the hour."
             timeIsValid=0
           fi
           if [ $timeIsValid = 1 ]
           then
             timeFrom=$2
           else
             paraIsValid=0
           fi
         else
           echo "Wrong parameter format for -from!"
           paraIsValid=0
         fi
         ;; 
        
    -to)
         timeIsValid=`echo $2 | grep -c [0-9][0-9][0-9][0-9]/[0-9][0-9]/[0-9][0-9]-[0-9][0-9]:00$`
         if [ $timeIsValid -eq 1 ]
         then
           Year=`echo $2 | cut -c1-4`
           Month=`echo $2 | cut -c6-7`
           Day=`echo $2 | cut -c9-10`
           Hour=`echo $2 | cut -c12-13`
           if [ $Month -ge 13 ]
           then
             echo "Wrong parameter for -to! Please check the month."
             timeIsValid=0
           fi
           if [ $Day -ge 32 ]
           then
             echo "Wrong parameter for -to! Please check the day."
             timeIsValid=0
           fi
           if [ $Hour -ge 25 ]
           then
             echo "Wrong parameter for -to! Please check the hour."
             timeIsValid=0
           fi
           fromTimeValue=`echo $timeFrom | sed -e "s/\///g" | sed -e "s/-//" | sed -e "s/://"`
           toTimeValue=`echo $2 | sed -e "s/\///g" | sed -e "s/-//" | sed -e "s/://"`
           if [ $toTimeValue -le $fromTimeValue ]
           then
             echo "Wrong parameter for -to! The time for -to is not later than that for -from."
             timeIsValid=0
           fi
           if [ $timeIsValid = 1 ]
           then
             timeTo=$2
           else
             paraIsValid=0
           fi
         else
           echo "Wrong parameter format for -to!"
           paraIsValid=0
         fi
         ;;
   
    -o)
         if [ "$2" != "" ]
         then
           output=$2
         else
           echo "Wrong parameter for -o!"
           paraIsValid=0
         fi
         ;;
     
    *)                
         echo "Bad option \"$1\"."
         paraIsValid=0
         ;;
  esac
   
    para=`expr $para + 2`
   
    shift
    if [ $# -gt 1 ]
    then
      shift
    fi
  done
  if [ $paraIsValid -eq 0 -o $reportType = "UNKNOWN" ]
  then
    usage
  else
   if [ $reportType = "latency" ]
   then
     output="latencyReport.txt"
   fi
   if [ $reportType = "activity" ]
   then
     output="activityReport.txt"
   fi
  fi
 
fi