Merge pull request #222 from danimo/fix_subnet_calc

mkinitrd-suse.sh: Fix prefix calculation
2017-04-26 09:22:19 +02:00 · 2017-04-26 09:22:19 +02:00 · bc6f06a795
parent 11947da13f 7cf2c21798
commit bc6f06a795
1 changed files with 1 additions and 1 deletions
--- a/mkinitrd-suse.sh
+++ b/mkinitrd-suse.sh
@ -104,7 +104,7 @@ calc_netmask() {
    local prefix=$1

    [ -z "$prefix" ] && return
-    mask=$(echo "(2 ^ 32) - (2 ^ $prefix)" | bc -l)
+    mask=$(( 0xffffffff << (32 - $prefix) ))
    byte1=$(( mask >> 24 ))
    byte2=$(( mask >> 16 ))
    byte3=$(( mask >> 8 ))