Shell Programming and Scripting

while true
    do
        printf "$FBOLD\nPlease enter the minutes (0-59): $FREG"
        read MIN

        case "$MIN" in
                [0-9]|[0-5][0-9]|s) break 2;;
            *) 
        echo ""
     echo "Invalid minutes, please try again.";;
        esac
    
    done

$
$ cat f25.sh
#!/usr/bin/bash
while true
do
 printf "$FBOLD\nPlease enter the minutes (0-59): $FREG"
 read MIN
 case "$MIN" in
   [0-9]|[0-5][0-9]|s|"") break 2;;
   *)
     echo ""
     echo "Invalid minutes, please try again.";;
 esac
done
$

$
$ ./f25.sh
Please enter the minutes (0-59):
$
$

total =        2
linelength=       62
14
linelength=       62
28

#!/bin/bash
DATA_DIR=/export/opt/rtrupld/autosys/scripts_old
data=`ls $DATA_DIR/count.txt`

#     count1=1
var=`wc -l < $data`
#var2=`expr $var + 1`
echo "total = $var"
#var3=14

tildacount=0
while read line
do
   count=0
   linelen=`echo "$line"|wc -c`
 
echo "linelength= $linelen"
   if [ $linelen -gt 0 ]
     then 

# echo $linelen
       until [ $count -ge $linelen ]
     do
         count=`expr  $count + 1 `
         char=`echo "$line"|cut -b"$count"`
         if [ "$char" = "~" ]
         then
            tildacount=`expr  $tildacount + 1`
 
     fi
 
     done
     echo $tildacount

  fi
done < $data
#echo $tildacount

check_minutes()
{
    
    while true
    do
        printf "$FBOLD\nPlease enter the minutes (0-59): $FREG"
        read MIN

        case "$MIN" in
		[0-9]|[0-5][0-9]|"") break 2;;
	      *) 
		echo ""
	 echo "Invalid minutes, please try again.";;
        esac
	
    done

./install_cron_export_gps.sh: line 92: [: =: unary operator expected

minute =

check_minutes()
{
    
    while true
    do
        printf "$FBOLD\nPlease enter the minutes (0-59): $FREG"
        read MIN

        case "$MIN" in
		[0-9]|[0-5][0-9]) break 2;;
	      *) 
		echo ""
	 echo "Invalid minutes, please try again.";;
        esac
	
    done