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extern crate libudev_sys as udev;
extern crate libc;
#[cfg(hwdb)] use std::env;
#[cfg(hwdb)] use std::str;
#[cfg(hwdb)] use std::ffi::{CString,CStr};
#[cfg(hwdb)] use libc::c_char;
#[cfg(hwdb)]
fn main() {
let args = env::args().collect::<Vec<_>>();
if args.len() != 2 {
println!("Usage: hwdb_query <modalias>");
return;
}
let query = CString::new(args[1].clone()).unwrap();
unsafe {
let udev = udev::udev_new();
if !udev.is_null() {
let hwdb = udev::udev_hwdb_new(udev);
if !hwdb.is_null() {
query_hwdb(hwdb, &query);
udev::udev_hwdb_unref(hwdb);
}
udev::udev_unref(udev);
}
}
}
#[cfg(hwdb)]
unsafe fn query_hwdb(hwdb: *mut udev::udev_hwdb, query: &CString) {
println!("{:>30}: {:?}", "query", query);
udev::udev_hwdb_ref(hwdb);
print_results(udev::udev_hwdb_get_properties_list_entry(hwdb, query.as_ptr(), 0));
udev::udev_hwdb_unref(hwdb);
}
#[cfg(hwdb)]
unsafe fn print_results(list_entry: *mut udev::udev_list_entry) {
if list_entry.is_null() {
return;
}
let key = unwrap_str(udev::udev_list_entry_get_name(list_entry));
let val = unwrap_str(udev::udev_list_entry_get_value(list_entry));
println!("{:>30}: {}", key, val);
print_results(udev::udev_list_entry_get_next(list_entry));
}
#[cfg(hwdb)]
unsafe fn unwrap_str<'a>(ptr: *const c_char) -> &'a str {
str::from_utf8(CStr::from_ptr(ptr).to_bytes()).unwrap()
}
#[cfg(not(hwdb))]
fn main() {
println!("hwdb is not supported by native libudev");
}
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