1 files changed, 7 insertions, 6 deletions

diff --git a/collector/wifi_linux.go b/collector/wifi_linux.go
index b4b3759..076982d 100644
--- a/collector/wifi_linux.go
+++ b/collector/wifi_linux.go
@@ -17,6 +17,7 @@ package collector
 
 import (
         "encoding/json"
+        "errors"
         "fmt"
         "io/ioutil"
         "os"
@@ -167,11 +168,11 @@ func (c *wifiCollector) Update(ch chan<- prometheus.Metric) error {
         stat, err := newWifiStater(*collectorWifi)
         if err != nil {
                 // Cannot access wifi metrics, report no error.
-                if os.IsNotExist(err) {
+                if errors.Is(err, os.ErrNotExist) {
                         level.Debug(c.logger).Log("msg", "wifi collector metrics are not available for this system")
                         return ErrNoData
                 }
-                if os.IsPermission(err) {
+                if errors.Is(err, os.ErrPermission) {
                         level.Debug(c.logger).Log("msg", "wifi collector got permission denied when accessing metrics")
                         return ErrNoData
                 }
@@ -201,14 +202,14 @@ func (c *wifiCollector) Update(ch chan<- prometheus.Metric) error {
                 )
 
                 // When a statistic is not available for a given interface, package wifi
-                // returns an error compatible with os.IsNotExist.  We leverage this to
-                // only export metrics which are actually valid for given interface types.
+                // returns a os.ErrNotExist error.  We leverage this to only export
+                // metrics which are actually valid for given interface types.
 
                 bss, err := stat.BSS(ifi)
                 switch {
                 case err == nil:
                         c.updateBSSStats(ch, ifi.Name, bss)
-                case os.IsNotExist(err):
+                case errors.Is(err, os.ErrNotExist):
                         level.Debug(c.logger).Log("msg", "BSS information not found for wifi device", "name", ifi.Name)
                 default:
                         return fmt.Errorf("failed to retrieve BSS for device %s: %v",
@@ -221,7 +222,7 @@ func (c *wifiCollector) Update(ch chan<- prometheus.Metric) error {
                         for _, station := range stations {
                                 c.updateStationStats(ch, ifi.Name, station)
                         }
-                case os.IsNotExist(err):
+                case errors.Is(err, os.ErrNotExist):
                         level.Debug(c.logger).Log("msg", "station information not found for wifi device", "name", ifi.Name)
                 default:
                         return fmt.Errorf("failed to retrieve station info for device %q: %v",