From: W. Trevor King <wking@drexel.edu>
Date: Mon, 21 Nov 2011 03:21:22 +0000 (-0500)
Subject: Adjust bat.sh to find the first battery matching /sys/class/power_supply/BAT[0-9].
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=d2d27bf2d0aacb60c57529c2b4a6f8d77bbda8b7;p=blog.git

Adjust bat.sh to find the first battery matching /sys/class/power_supply/BAT[0-9].
---

diff --git a/posts/bat/bat.sh b/posts/bat/bat.sh
index b7c0a5c..a66901d 100755
--- a/posts/bat/bat.sh
+++ b/posts/bat/bat.sh
@@ -18,12 +18,22 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
-BAT="BAT0"
-SYSPATH="/sys/class/power_supply/$BAT"
+for i in $(seq 0 9); do
+  BAT="BAT${i}"
+  SYSPATH="/sys/class/power_supply/$BAT"
+  if [ -d "${SYSPATH}" ]; then
+    break
+  fi
+done
+
+if [ ! -d "${SYSPATH}" ]; then
+  echo "No battery found in $(dirname "${SYSPATH}")"
+  exit 1
+fi
 
 STATUS=$(cat "$SYSPATH/status")
 CAPACITY=$(cat "$SYSPATH/charge_full")
 LEVEL=$(cat "$SYSPATH/charge_now")
 PERCENT=$(python -c "print($LEVEL * 100. / $CAPACITY)")
 
-echo -e "$STATUS\t$LEVEL/$CAPACITY ($PERCENT%)"
+echo -e "$BAT\t$STATUS\t$LEVEL/$CAPACITY ($PERCENT%)"