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Merge pull request #7 from FreifunkBremen/master

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gluon-autoupdater: get random number from /dev/urandom
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Nils Schneider 2014-01-19 13:40:13 -08:00
commit 4fef2e5e11
1 changed files with 3 additions and 1 deletions
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package/gluon-autoupdater/files/usr/sbin/autoupdater
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@ -10,7 +10,9 @@ BRANCH=$(uci get autoupdater.settings.branch)
PROBABILITY=$(uci get autoupdater.${BRANCH}.probability) PROBABILITY=$(uci get autoupdater.${BRANCH}.probability)
if test "a$1" != "a-f"; then if test "a$1" != "a-f"; then
echo | awk "END{srand();exit rand() > $PROBABILITY}" # get one random byte from /dev/urandom, convert it to decimal and check
# against update_probability*255
hexdump -n1 -e '/1 "%d"' /dev/urandom | awk "{exit \$1 > $PROBABILITY * 255}"
if test $? -ne 0; then if test $? -ne 0; then
echo "No autoupdate this time. Use -f to override" echo "No autoupdate this time. Use -f to override"
exit 0 exit 0