Function validate_input 

pub fn validate_input(input: &str) -> Result<()>

Validate and sanitize general user input

Applies whitelist-based validation allowing only safe characters:

• Alphanumeric characters (a-zA-Z0-9)
• Whitespace
• Common safe punctuation: . _ / -

Security Considerations

• Prevents command injection by rejecting shell metacharacters
• Blocks null bytes
• Limits input length to prevent DoS

Errors

Returns error if input contains disallowed characters or exceeds length limit

Examples

use backup_suite::core::validation::validate_input;

// Valid inputs
assert!(validate_input("backup_2024-01-15").is_ok());
assert!(validate_input("user/documents").is_ok());

// Invalid inputs (shell metacharacters)
assert!(validate_input("test; rm -rf /").is_err());
assert!(validate_input("test | cat /etc/passwd").is_err());
assert!(validate_input("test && malicious").is_err());