56 lines
1.0 KiB
Go
56 lines
1.0 KiB
Go
|
package sysfs
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io/ioutil"
|
||
|
|
"log"
|
||
|
|
"path/filepath"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
// DeviceByProperty lists the devices where a given property=value filters match.
|
||
|
|
func DeviceByProperty(class string, filters ...string) []string {
|
||
|
|
files, err := filepath.Glob("/sys/class/" + class + "/*/uevent")
|
||
|
|
if err != nil {
|
||
|
|
log.Print("list devices failed: ", err)
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
filtered := make([]string, 0)
|
||
|
|
|
||
|
|
filesLoop:
|
||
|
|
for _, file := range files {
|
||
|
|
ba, err := ioutil.ReadFile(file)
|
||
|
|
if err != nil {
|
||
|
|
log.Print("reading ", file, " failed: ", err)
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
|
||
|
|
values := strings.Split(strings.TrimSpace(string(ba)), "\n")
|
||
|
|
|
||
|
|
devName := ""
|
||
|
|
for _, value := range values {
|
||
|
|
if strings.HasPrefix(value, "DEVNAME=") {
|
||
|
|
devName = value[len("DEVNAME="):]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, filter := range filters {
|
||
|
|
found := false
|
||
|
|
for _, value := range values {
|
||
|
|
if filter == value {
|
||
|
|
found = true
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if !found {
|
||
|
|
continue filesLoop
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
filtered = append(filtered, devName)
|
||
|
|
}
|
||
|
|
|
||
|
|
return filtered
|
||
|
|
}
|