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// Copyright 2013 Google Inc. All rights reserved.
// Copyright 2016 the gousb Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package usbid
import (
"errors"
"io/fs"
"log"
"os"
)
var (
// Vendors stores the vendor and product ID mappings.
Vendors map[ID]*Vendor
// Classes stores the class, subclass and protocol mappings.
Classes map[ClassCode]*Class
)
// Load reads the USB database from disk.
func Load() {
usbidFile := os.Getenv("INCUS_USBIDS_PATH")
if usbidFile == "" {
usbidFile = "/usr/share/misc/usb.ids"
}
usbids, err := os.Open(usbidFile)
if err != nil {
if !errors.Is(err, fs.ErrNotExist) {
log.Printf("usbid: failed to load: %s", err)
}
return
}
defer func() { _ = usbids.Close() }()
ids, cls, err := ParseIDs(usbids)
if err != nil {
log.Printf("usbid: failed to parse: %s", err)
return
}
Vendors = ids
Classes = cls
}
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