Function sanitize_string 

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

Sanitize string by removing control characters

Removes all control characters except whitespace (space, tab, newline). This provides defense-in-depth even when used after validate_input.

Security Considerations

• Removes null bytes
• Removes other control characters that could interfere with terminal output
• Preserves legitimate whitespace

Errors

Returns error if null byte is detected (fail-fast for security)

Examples

use backup_suite::core::validation::sanitize_string;

// Normal text passes through
assert_eq!(sanitize_string("Hello World").unwrap(), "Hello World");

// Null bytes are rejected
assert!(sanitize_string("test\0malicious").is_err());

// Control characters are removed
assert_eq!(sanitize_string("test\x01\x02data").unwrap(), "testdata");