a6b010a8b4
See https://go.dev/doc/go1.19 Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
56 lines
1.0 KiB
Go
56 lines
1.0 KiB
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package pci
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import (
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"bytes"
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"errors"
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"fmt"
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"io/fs"
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"os"
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"strconv"
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)
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const sysfsPath = "/sys/bus/pci/devices/%s/%s"
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func readID(busPath, name string) (uint16, error) {
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contents, err := os.ReadFile(fmt.Sprintf(sysfsPath, busPath, name))
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if err != nil {
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return 0, err
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}
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v, err := strconv.ParseUint(string(bytes.TrimSpace(contents)), 0, 16)
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return uint16(v), err
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}
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// SysfsDeviceInfo looks up vendor and product ID from sysfs.
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func SysfsDeviceInfo(busPath string) (*Device, error) {
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var (
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d Device
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err error
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)
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d.ProductID, err = readID(busPath, "device")
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if err != nil {
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if errors.Is(err, fs.ErrNotExist) {
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return nil, nil
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}
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return nil, err
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}
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d.VendorID, err = readID(busPath, "vendor")
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if err != nil {
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if errors.Is(err, fs.ErrNotExist) {
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return nil, nil
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}
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return nil, err
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}
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return &d, err
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}
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