Question

1

The mentioned syntax error was in this while loop

rated 0 times [ 1] [ 0] / answers: 1 / hits: 798 / 1 Year ago, mon, december 26, 2022, 1:52:01

I ran the below code through shellcheck myscript and keep getting this error. How can I correct it?

****Line 48:

 while [ $count - lt 3 ]



 ^-- SC1009: The mentioned syntax error was in this while loop.

       ^-- SC1073: Couldn't parse this test expression. Fix to allow more checks.**

                ^-- SC1076: Trying to do math? Use e.g. [ $((i/2+7)) -ge 18 ].

                 ^-- SC1072: Expected a test operator. Fix any mentioned problems and try again.**

 #!/bin/bash

 touch.bash_profile 

  mkdir login.sh 

  chmod + x login.sh 

  echo "Enter Your Username." 

  read user 

  echo "Enter Your Password." 

 read pass 

# to check blank inputs

  if [ -z "$user" ] ||

  [ -z "$pass" ] 

 then 

 echo 'Inputs cannot be blank. Please retry.' 

# Checking entered username and password with actual credentials

# if matched

    if [ "$Username" = "Alpha" ] ||

    [ "$Password" = "Beta" ] ;

then 

 pwd 

  else

# if not matched

      count = 1 

 while [ $count - lt 3 ]

      do

if["$Username" != "$user"]

      ||["$Password" != "$pass"];

then 

 left = 3 - $count 

 echo b

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answered 1 Year ago quivedge · Accepted Answer

Try this I think I have the flow correct.

#!/bin/bash

# Create the files .bash_profile and login.sh in the current directory making the login.sh executable.



touch .bash_profile 

touch login.sh 

chmod +x login.sh 



# Tell them what needs to be done



echo "This script requires you to enter the Username and Password, you have three tries at it."



# set the count to 0

count=0

while [ $count -lt 3 ] ; do



    # Check for Username



    echo "Enter Your Username:" 

    read user 

    if [ -z "$user" ] ; then

        echo "You must enter a Username"

    fi

    

    # Check for Password



   echo "Enter Your Password:" 

    read pass 

    if [ -z "$pass" ] ; then

        echo "You must enter a Password"

    fi

    

    #checking entered username and password with actual credentials



    #if matched $Username and $Password



    if [ "$user" = "Alpha" ] && [ "$pass" = "Beta" ] ; then

         pwd 

         exit 0



    else



    #if not matched



        let "count+=1" 

        echo "This is try number $count "

    fi

done

The output when you run it and the contents of the directory afterwards.

root@buster-raspi:~/test# ./test.sh

This script requires you to enter the Username and Password, you have three tries at it.

Enter Your Username

test

Enter Your Password

trtet

This is try number 1 

Enter Your Username

test

Enter Your Password

rsrseres

This is try number 2 

Enter Your Username

dsddsf

Enter Your Password

gfdggdf

This is try number 3 

root@buster-raspi:~/test# ./test.sh

This script requires you to enter the Username and Password, you have three tries at it.

Enter Your Username

test

Enter Your Password



You must enter a Password

This is try number 1 

Enter Your Username

root@buster-raspi:~/test# ./test.sh

This script requires you to enter the Username and Password, you have three tries at it.

Enter Your Username

Alpha

Enter Your Password

Beta

/root/test

root@buster-raspi:~/test# ls -l

total 4

-rwxr-xr-x 1 root root   0 Feb 26 22:06 login.sh

-rwxr-xr-x 1 root root 927 Feb 26 22:05 test.sh

root@buster-raspi:~/test# ls -l .bash_profile 

-rw-r--r-- 1 root root 0 Feb 26 22:11 .bash_profile

-rwxr-xr-x 1 root root 927 Feb 26 22:05 test.sh