28 lines
865 B
Diff
28 lines
865 B
Diff
From 7cf2c21798b537a5553ecc23df5ce8cfda631e9c Mon Sep 17 00:00:00 2001
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From: Daniel Molkentin <dmolkentin@suse.com>
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Date: Tue, 25 Apr 2017 15:25:20 +0200
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Subject: [PATCH] mkinitrd-suse.sh: Fix prefix calculation
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The previous algorithm was incorrect and would return
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incorrect results e.g. for a /20 mask. Also gets rid
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of an undocumented depencency on bc(1).
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Reference: bsc#1035743
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---
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mkinitrd-suse.sh | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/mkinitrd-suse.sh b/mkinitrd-suse.sh
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index bc49d731..d9de81b9 100755
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--- a/mkinitrd-suse.sh
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+++ b/mkinitrd-suse.sh
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@@ -104,7 +104,7 @@ calc_netmask() {
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local prefix=$1
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[ -z "$prefix" ] && return
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- mask=$(echo "(2 ^ 32) - (2 ^ $prefix)" | bc -l)
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+ mask=$(( 0xffffffff << (32 - $prefix) ))
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byte1=$(( mask >> 24 ))
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byte2=$(( mask >> 16 ))
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byte3=$(( mask >> 8 ))
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