1 files changed, 10 insertions, 2 deletions

diff --git a/light2.sh b/light2.sh
index 54c480a..157cb02 100755
--- a/light2.sh
+++ b/light2.sh
@@ -7,7 +7,7 @@ if [ $# -gt 1 ] ; then
     exit
 fi
 if [ -z "$1" ] ; then
-    val=150
+    val="show"
 else
     val="$1"
 fi
@@ -15,7 +15,15 @@ fi
 if [ -n "$listBacklight" ] ; then
     for backlight in "$listBacklight"
     do
-        echo "${val}" | $right tee "/sys/class/backlight/${backlight}/brightness" 2>&1 /dev/null
+        if [ "$val" == "show" ]; then
+          printf "${backlight}: "
+          cat /sys/class/backlight/${backlight}/brightness
+        else
+          echo "${val}" | tee "/sys/class/backlight/${backlight}/brightness" 2>/dev/null /dev/null
+          if [ $? -ne 0 ]; then
+            printf "%s\n" "Erreur can't write to /sys/class/backlight/${backlight}/brightness" >&2
+          fi
+        fi
     done
 else
     echo 'No backlight detected'