Error handling

1 files changed, 9 insertions, 4 deletions

diff --git a/battery b/battery
index 51464a5..dc3724e 100755
--- a/battery
+++ b/battery
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-names="sbs-20-000b BAT0 BAT1"
+names="sbs-20-000b BAT1"
 dir=""
 
 for n in $names; do
@@ -10,6 +10,11 @@ for n in $names; do
     fi;
 done
 
+if [ -z "$dir" ]; then
+    echo \?
+    exit 0
+fi
+
 fetch() {
     cat /sys/class/power_supply/$dir/$1
 }
@@ -19,11 +24,11 @@ status=$(fetch status)
 if [ "$status" = "Full" ] ; then
     echo $status
 else
-    
+
     if [ "$status" = "Discharging" ]; then
-	time=$(fetch time_to_empty_avg)
+  time=$(fetch time_to_empty_avg)
     else
-	time=$(fetch time_to_full_avg)
+  time=$(fetch time_to_full_avg)
     fi;
 
     hours=$(($time/3600))