mirror of https://github.com/kidoman/embd
digitalPin: do not export if the /sys/class/gpio/... file already exists
This commit is contained in:
parent
bfcd1345fe
commit
e36e169d6c
|
@ -62,7 +62,21 @@ func (p *digitalPin) init() error {
|
|||
return nil
|
||||
}
|
||||
|
||||
func (p *digitalPin) isExported() bool {
|
||||
if _, err := os.Stat(p.basePath()); err == nil {
|
||||
return true
|
||||
} else if os.IsNotExist(err) {
|
||||
return false
|
||||
} else {
|
||||
// unknown
|
||||
return false
|
||||
}
|
||||
}
|
||||
|
||||
func (p *digitalPin) export() error {
|
||||
if p.isExported() {
|
||||
return nil
|
||||
}
|
||||
exporter, err := os.OpenFile("/sys/class/gpio/export", os.O_WRONLY, os.ModeExclusive)
|
||||
if err != nil {
|
||||
return err
|
||||
|
|
Loading…
Reference in New Issue