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casc.rs
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casc.rs
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// Copyright (c) Microsoft Corporation.
// SPDX-License-Identifier: MIT
use selinux_cascade::compile_system_policy;
use selinux_cascade::error::ErrorItem;
use clap::Parser;
use std::fs::File;
use std::io::{Error, ErrorKind, Write};
use walkdir::WalkDir;
#[derive(Parser, Debug)]
#[clap(author, version, name = "casc")]
struct Args {
#[clap(required(true))]
input_file: Vec<String>,
}
fn main() -> std::io::Result<()> {
let args = Args::parse();
let policies: Vec<String> = get_policy_files(args.input_file);
let mut out_file = File::create("out.cil")?;
let res = compile_system_policy(policies.iter().map(|s| s as &str).collect());
match res {
Err(error_list) => {
for e in error_list {
if let ErrorItem::Parse(p) = e {
p.print_diagnostic();
} else if let ErrorItem::Compile(c) = e {
c.print_diagnostic();
} else {
eprintln!("{}", e);
}
}
Err(Error::new(ErrorKind::InvalidData, "Invalid policy"))
}
Ok(s) => out_file.write_all(s.as_bytes()),
}
}
// Create a list of policy files
// Display info and proceed on errors. As long as we have at least one file, errors should be
// considered non-fatal
fn get_policy_files(filenames: Vec<String>) -> Vec<String> {
let mut policy_files = Vec::new();
for file in filenames {
for entry in WalkDir::new(file) {
match entry {
Ok(entry) => {
if entry.file_type().is_file()
&& entry.path().extension().unwrap_or_default() == "cas"
{
let filename = entry.path().display().to_string();
policy_files.push(filename);
}
}
Err(e) => {
if let Some(path) = e.path() {
eprintln!("{}: {}", path.display(), e);
} else {
eprintln!("{}", e);
}
}
}
}
}
policy_files
}