| 1 | #!/bin/sh
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| 2 |
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| 3 | # As with other programming languages, we can evaluate if conditions or
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| 4 | # statements are true or false. In this exercise we will be dealing with
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| 5 | # strings and basic if/else structure. Below are 3 examples of this.
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| 6 | #
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| 7 | # $ option="yes"
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| 8 | # $ if [ "$option" = "yes" ]; then
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| 9 | # $ echo "option enabled"
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| 10 | # $ fi
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| 11 | #
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| 12 | # $ password="shellling123"
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| 13 | # $ if [ "$name" = "shellling123" ]; then
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| 14 | # $ echo "access granted"
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| 15 | # $ else
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| 16 | # $ echo "access denied"
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| 17 | # $ fi
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| 18 | #
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| 19 | # $ printf "Enter name: "
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| 20 | # $ read name
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| 21 | # $ if [ "$name" = "shellling" ]; then
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| 22 | # $ echo "Welcome!"
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| 23 | # $ elif [ "$name" = "shelllings" ]; then
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| 24 | # $ echo "Welcome all!"
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| 25 | # $ else
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| 26 | # $ echo "You are not welcome here."
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| 27 | # $ fi
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| 28 | #
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| 29 | # Notice that there is spaces between the square brackets and that, for
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| 30 | # strings, there are quotation marks around the variables. There are
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| 31 | # more options than just '='
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| 32 | #
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| 33 | # = # strict string comparison of equals
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| 34 | # != # strict string comparison of does not equal
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| 35 | # -z # checks if string is empty
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| 36 | # -n # checks if string is not empty
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| 37 | #
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| 38 | # Fix the incomplete script below, leave all the echo lines unchanged
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| 39 |
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| 40 | if # check if user input is or is not empty here
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| 41 | if [ "$1" = "password123" ] then
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| 42 | echo "Welcome"
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| 43 | else
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| 44 | echo "Access not granted"
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| 45 | else
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| 46 | echo "Password not entered"
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