initial setup of an app to toggle acpi wakeup devices

pkg/procfs/procfs.go

@@ -0,0 +1,36 @@
+package procfs
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+const (
+	acpiWakeupDefaultPath = "/proc/acpi/wakeup"
+)
+
+type Procfs interface {
+	ACPIWakeup() (io.ReadCloser, error)
+	ACPIWakeupWrite() (io.WriteCloser, error)
+}
+
+type ProcfsDefaultPath struct{}
+
+func (p *ProcfsDefaultPath) ACPIWakeup() (io.ReadCloser, error) {
+	f, err := os.Open(acpiWakeupDefaultPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open %s: %w", acpiWakeupDefaultPath, err)
+	}
+
+	return f, nil
+}
+
+func (p *ProcfsDefaultPath) ACPIWakeupWrite() (io.WriteCloser, error) {
+	f, err := os.OpenFile(acpiWakeupDefaultPath, os.O_WRONLY, 0)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open for writing %s: %w", acpiWakeupDefaultPath, err)
+	}
+
+	return f, nil
+}