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