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telem-seq.sh: Make compatible to busybox sh #180

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telem-seq.sh: Make compatible to busybox sh #180

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6 changes: 5 additions & 1 deletion telemetry-toolkit/telem-seq.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,10 @@
# Generate sequence number as described here:
# https://github.com/wb2osz/direwolf/issues/9
#
if [ ! -f /tmp/seq ]; then
echo 0 > /tmp/seq
fi

SEQ=`cat /tmp/seq 2>/dev/null`
SEQ=$(expr \( $SEQ + 1 \) % 1000)
echo $SEQ | tee /tmp/seq
echo $SEQ | tee /tmp/seq