util: new function abs

This function return the absolute value of a given number.

Signed-off-by: Jonatan Schlag <jonatan.schlag@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/functions/functions.util b/src/functions/functions.util
index b7e35c91e063814fc9301dd04a474ed0d6346b60..37feb73b308a4e0b7c23a3184de9dc0e2a3f7e8e 100644 (file)
--- a/src/functions/functions.util
+++ b/src/functions/functions.util
@@ -268,6 +268,16 @@ uuid() {
        echo $(</proc/sys/kernel/random/uuid)
 }
 
+abs() {
+       local val=${1}
+
+       if [ ${val} -lt 0 ]; then
+               (( val *= -1 ))
+       fi
+
+       echo ${val}
+}
+
 rand() {
        local uuid="$(uuid)"
        echo "${uuid//-/}"