dartokloning revised this gist . Go to revision
1 file changed, 3 insertions, 3 deletions
UsernameValidation.sh
| @@ -20,9 +20,9 @@ function validate_username() { | |||
| 20 | 20 | return 1 | |
| 21 | 21 | fi | |
| 22 | 22 | ||
| 23 | - | # Check if username contains only letters and numbers | |
| 24 | - | if ! [[ "$username" =~ ^[a-zA-Z0-9]+$ ]]; then | |
| 25 | - | echo "Username can only contain letters and numbers, and no spaces." | |
| 23 | + | # Check if username contains only lowercase letters and numbers | |
| 24 | + | if ! [[ "$username" =~ ^[a-z0-9]+$ ]]; then | |
| 25 | + | echo "Username can only contain lowercase letters and numbers, and no spaces." | |
| 26 | 26 | return 1 | |
| 27 | 27 | fi | |
| 28 | 28 | ||
dartokloning revised this gist . Go to revision
1 file changed, 46 insertions
UsernameValidation.sh(file created)
| @@ -0,0 +1,46 @@ | |||
| 1 | + | #!/bin/bash | |
| 2 | + | ||
| 3 | + | #Validation Function: | |
| 4 | + | #- Checks if the username is not empty and has at least 5 characters. | |
| 5 | + | #- Checks if the username contains only letters and numbers with no spaces. | |
| 6 | + | #- Checks if the username already exists on the system. | |
| 7 | + | ||
| 8 | + | #Input and Validation: | |
| 9 | + | #- Prompts the user to enter a username. | |
| 10 | + | #- Calls the validation function to check the entered username. | |
| 11 | + | #- Displays appropriate messages based on the validation result. | |
| 12 | + | ||
| 13 | + | # Function to validate the username | |
| 14 | + | function validate_username() { | |
| 15 | + | local username="$1" | |
| 16 | + | ||
| 17 | + | # Check if username is not empty and has at least 5 characters | |
| 18 | + | if [[ -z "$username" ]] || [[ ${#username} -lt 5 ]]; then | |
| 19 | + | echo "Username must be at least 5 characters long and cannot be empty." | |
| 20 | + | return 1 | |
| 21 | + | fi | |
| 22 | + | ||
| 23 | + | # Check if username contains only letters and numbers | |
| 24 | + | if ! [[ "$username" =~ ^[a-zA-Z0-9]+$ ]]; then | |
| 25 | + | echo "Username can only contain letters and numbers, and no spaces." | |
| 26 | + | return 1 | |
| 27 | + | fi | |
| 28 | + | ||
| 29 | + | # Check if the username already exists on the system | |
| 30 | + | if id "$username" &>/dev/null; then | |
| 31 | + | echo "Username already exists on the system." | |
| 32 | + | return 1 | |
| 33 | + | fi | |
| 34 | + | ||
| 35 | + | return 0 | |
| 36 | + | } | |
| 37 | + | ||
| 38 | + | # Get username input from the user | |
| 39 | + | read -p "Enter username: " username | |
| 40 | + | ||
| 41 | + | # Validate the username | |
| 42 | + | if validate_username "$username"; then | |
| 43 | + | echo "Username is valid." | |
| 44 | + | else | |
| 45 | + | echo "Username is invalid. Please try again." | |
| 46 | + | fi | |
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