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package utils
import (
"fmt"
"io/ioutil"
"os/exec"
"strings"
)
// UEventType device port r=type
type UEventType int
const (
// device with pci port
UEventTypePCI UEventType = iota + 11
// device with usb port
UEventTypeUSB
)
const (
// SlotTypePCI pci type slot
SlotTypePCI = "pci"
// SlotTypeUSB usb type slot
SlotTypeUSB = "usb"
)
// IDInfo store device vendor or device info
type IDInfo struct {
ID string
Name string
}
// PCIUevent pci uevent data
type PCIUEvent struct {
Driver string
Vendor *IDInfo
Device *IDInfo
SVendor *IDInfo // subsystem vendor
SDevice *IDInfo // subsystem device
name string
slotName string
}
// USBUEvent usb uevent data
type USBUEvent struct {
Driver string
Vendor string
Product string
name string
}
// UEvent store device uevent file
type UEvent struct {
Type UEventType
Name string
Data interface{}
}
func NewUEvent(filename string) (*UEvent, error) {
contents, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
var pairs = make(map[string]string)
lines := strings.Split(string(contents), "\n")
for _, line := range lines {
if len(line) == 0 {
continue
}
items := strings.SplitN(line, "=", 2)
pairs[items[0]] = items[1]
}
var info UEvent
if _, ok := pairs["PCI_SLOT_NAME"]; ok {
info.Type = UEventTypePCI
var pci *PCIUEvent
pci, err = newPCIUEvent(pairs)
if err == nil {
info.Name = pci.name
info.Data = pci
}
} else {
var usb *USBUEvent
info.Type = UEventTypeUSB
usb, err = newUSBUEvent(pairs)
if err == nil {
info.Name = usb.name
info.Data = usb
}
}
if err != nil {
return nil, err
}
return &info, nil
}
func newPCIUEvent(pairs map[string]string) (*PCIUEvent, error) {
var info = PCIUEvent{
Driver: pairs["DRIVER"],
slotName: pairs["PCI_SLOT_NAME"],
}
output, err := getCommandOutput(fmt.Sprintf("lspci -vmm -s %s", info.slotName))
if err != nil {
return nil, err
}
outPairs := formatLspciOutput(output)
pciID := pairs["PCI_ID"]
idItems := strings.Split(pciID, ":")
info.Vendor = &IDInfo{ID: idItems[0], Name: outPairs["Vendor"]}
info.Device = &IDInfo{ID: idItems[1], Name: outPairs["Device"]}
subsysID := pairs["PCI_SUBSYS_ID"]
subsysItems := strings.Split(subsysID, ":")
info.SVendor = &IDInfo{ID: subsysItems[0], Name: outPairs["SVendor"]}
info.SDevice = &IDInfo{ID: subsysItems[1], Name: outPairs["SDevice"]}
info.name = fmt.Sprintf("%s %s", info.Vendor.Name, info.Device.Name)
return &info, nil
}
func newUSBUEvent(pairs map[string]string) (*USBUEvent, error) {
var info = USBUEvent{
Driver: pairs["DRIVER"],
}
product := pairs["PRODUCT"]
items := strings.Split(product, "/")
if len(items) < 3 {
return nil, fmt.Errorf("invalid uevent format, items < 3")
}
// compatible usb mouse
idx := 0
if len(items) == 4 {
idx = 1
}
info.Vendor = fmt.Sprintf("%04s", items[idx])
info.Product = fmt.Sprintf("%04s", items[idx+1])
output, err := getCommandOutput(fmt.Sprintf("lsusb -d %s:%s",
info.Vendor, info.Product))
if err != nil {
return nil, err
}
info.name = formatLsusbOutput(output)
return &info, nil
}
func formatLspciOutput(output []byte) map[string]string {
lines := strings.Split(string(output), "\n")
var pairs = make(map[string]string)
for _, line := range lines {
if len(line) == 0 {
continue
}
items := strings.SplitN(line, ":", 2)
items[1] = strings.TrimSpace(items[1])
pairs[items[0]] = items[1]
}
return pairs
}
func formatLsusbOutput(output []byte) string {
line := string(output)
line = strings.TrimRight(line, "\n")
items := strings.Split(line, "ID ")
list := strings.SplitN(items[1], " ", 2)
if len(list) != 2 {
return ""
}
return list[1]
}
func getCommandOutput(cmd string) ([]byte, error) {
return exec.Command("/bin/sh", "-c", cmd).CombinedOutput()
}
|
