I have homework to write a shell script that validates input according to the guidelines below. I've written the script, but the -f option needs work. Its suppose to to be a valid input if its is a letter, what i did is if its a number it wont be valid. therefor a -f option starting with ^ would be valid. GuideLines:---------------------------… Validate input (validateInput option) 1.write a script which will accept one of 3 options a.–u uName b.–g gName c.–f fullname 2.uName must be a.between 5-8 characters long 3.gName must be a.between 3-5 character long 4.fullname must be a.must be between 8-24 character long and must start with a character 5.the script should echo value 0 if the input is valid, -1 otherwise Script:-------------------------------… arg=$1 text=$2 case "$arg" in "-u") #validate size of uName if [ ${#text} -lt 5 ] || [ ${#text} -gt 8 ] then valid=-1 else valid=0 fi;; "-g") #validate size of gName if [ ${#text} -lt 3 ] || [ ${#text} -gt 5 ] then valid=-1 else valid=0 fi;; "-f") #check if fullname start with a letter firstCh=`expr substr $text 1 1` case "fisrtCh" in 1.2.3.4.5.6.7.8.9.0) valid=-1;; *) #validate size of fullname if [ ${#text} -lt 8 ] || [ ${#text} -gt 24 ] then valid= -1 else valid=0 fi;; esac esac #echo is o if valid, -1 is invalid echo $valid --------------------------------------… --How do i change the case option for firstCh to check the alphabet?
