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