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use std::fs;
use std::os::linux::fs::MetadataExt;
use std::os::unix::prelude::PermissionsExt;
use std::time::SystemTime;
use nix::unistd;
use serde_json::Value;
const PERSIST_TIME: u64 = 60 * 3;
pub fn get_persist(user: &str) -> bool {
let json = match get_terminal_config() {
Some(data) => data,
None => return false
};
let timestamp = match json[user].as_u64() {
Some(data) => data,
None => return false
};
return now() - timestamp < PERSIST_TIME;
}
pub fn set_persist(user: &str) {
let mut json = match get_terminal_config() {
Some(data) => data,
None => return
};
json[user] = Value::from(now());
let id = match get_terminal_process() {
Some(data) => data,
None => return
};
match write_terminal_config(&id, &json.to_string()) {
Ok(_) => {},
Err(e) => {
eprintln!("Internal Error: {}", e)
}
};
}
fn get_terminal_process() -> Option<i32> {
let id: i32 = match std::process::id().try_into() {
Ok(data) => data,
Err(_) => return None
};
let stat = match procinfo::pid::stat(id) {
Ok(data) => data,
Err(_) => return None
};
Some(stat.session)
}
fn is_file_root_only(id: &i32) -> bool {
let metadata = match std::fs::metadata(path(&id)) {
Ok(data) => data,
Err(e) => {
if let Some(err) = e.raw_os_error() {
return err == 2;
}
return true
}
};
let perms = metadata.permissions();
return perms.mode() == 33200 && metadata.st_uid() == 0 && metadata.st_gid() == 0;
}
fn get_terminal_config() -> Option<Value> {
let id = match get_terminal_process() {
Some(data) => data,
None => return None
};
if !is_file_root_only(&id) {
return None;
}
let data = match std::fs::read_to_string(path(&id)) {
Ok(data) => data,
Err(_) => "{}".to_string()
};
let json: Value = match serde_json::from_str(&data) {
Ok(data) => data,
Err(_) => return None
};
Some(json)
}
fn write_terminal_config(id: &i32, data: &str) -> Result<(), Box<dyn std::error::Error>> {
std::fs::write(path(&id), "")?;
unistd::chown(std::path::Path::new(&path(&id)), Some(unistd::Uid::from(0)), Some(unistd::Gid::from(0)))?;
let metadata = std::fs::metadata(path(&id))?;
let mut perms = metadata.permissions();
perms.set_mode(0o660);
fs::set_permissions(path(&id), perms)?;
std::fs::write(path(&id), data)?;
Ok(())
}
fn now() -> u64 {
return SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs();
}
fn path(id: &i32) -> String {
return format!("/tmp/crab-{}", id);
}
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