Secure Shell Command Execution: A Novel String Interpolation Approach

This article explores secure methods for executing shell commands with user input, avoiding command injection vulnerabilities. The author starts with a vulnerable example, then presents three improved solutions: using `execFile` instead of `exec`, passing arguments via environment variables, and employing safe interpolation with JavaScript tagged templates. The article also compares similar approaches in other languages like Python and Swift, culminating in a surprisingly clever (though not production-ready) Python solution using decorators and regular expressions to achieve safe interpolation.