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Refactor sepolicy.rules resolve native

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Co-authored-by: LoveSy <shana@zju.edu.cn>
This commit is contained in:
vvb2060
2023-03-08 14:42:54 +08:00
committed by John Wu
parent 4de93cfd4b
commit 362eea741f
12 changed files with 163 additions and 122 deletions
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native/src/init/lib.rs
-75
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@@ -1,9 +1,3 @@
use std::env;
use std::path::Path;
pub use base;
use base::libc::{dev_t, makedev};
use base::read_lines;
pub use logging::*;
mod logging;
@@ -12,74 +6,5 @@ mod logging;
pub mod ffi2 {
extern "Rust" {
fn setup_klog();
fn print_rules_device() -> i32;
}
}
pub fn print_rules_device() -> i32 {
const UNKNOWN: i32 = 0;
const PERSIST: i32 = UNKNOWN + 1;
const METADATA: i32 = PERSIST + 1;
const CACHE: i32 = METADATA + 1;
const UNENCRYPTED: i32 = CACHE + 1;
const DATA: i32 = UNENCRYPTED + 1;
const EXISTING: i32 = DATA + 1;
let encrypted = env::var("ISENCRYPTED").map_or(false, |var| var == "true");
let mut matched = UNKNOWN;
let mut rules_dev: dev_t = 0;
if let Ok(lines) = read_lines("/proc/self/mountinfo") {
for line in lines {
if let Ok(line) = line {
let new_matched;
if line.contains("/.magisk/sepolicy.rules ") {
new_matched = EXISTING;
} else if line.contains(" - ext4 ") && !line.contains("/dm-") {
if line.contains(" / /cache ") && matched < CACHE {
new_matched = CACHE;
} else if line.contains(" / /data ") && matched < DATA {
if !encrypted {
new_matched = UNENCRYPTED;
} else if Path::new("/data/unencrypted").is_dir() {
new_matched = DATA;
} else {
continue;
}
} else if line.contains(" / /metadata ") && matched < METADATA {
new_matched = METADATA;
} else if (line.contains(" / /persist ")
|| line.contains(" / /mnt/vendor/persist "))
&& matched < PERSIST
{
new_matched = PERSIST;
} else {
continue;
}
} else {
continue;
}
if let Some(device) = line.splitn(4, ' ').nth(2) {
device.split_once(':').map(|(a, b)| {
a.parse::<i32>().ok().map(|a| {
b.parse::<i32>().ok().map(|b| {
rules_dev = unsafe { makedev(a, b) };
matched = new_matched;
})
})
});
}
}
}
if matched > UNKNOWN {
println!("{rules_dev}");
return 0;
} else {
eprintln!("Failed to find sepolicy rules partition");
}
} else {
eprintln!("Error reading /proc/self/mountinfo");
}
return 1;
}