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Merge pull request #296 from klightspeed/1.4#lockupdate

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Prevent multiple updates from occurring concurrently
This commit is contained in:
Fez Vrasta 2015-11-23 15:37:23 +01:00
commit d7fc3bb3a2
1 changed files with 18 additions and 0 deletions
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18
tools/arkmanager
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@ -769,6 +769,22 @@ doUpdate() {
fi fi
done done
echo "$$" >"${arkserverroot}/.ark-update.lock.$$"
while true; do
if ! ln "${arkserverroot}/.ark-update.lock.$$" "${arkserverroot}/.ark-update.lock"; then
local lockpid="$(<"${arkserverroot}/.ark-update.lock")"
if [ -n "$lockpid" ] && [ "$lockpid" != "$$" ] && kill -0 "$lockpid"; then
echo "Update already in progress (PID: $lockpid)"
rm -f "${arkserverroot}/.ark-update.lock.$$"
return 1
fi
rm -f "${arkserverroot}/.ark-update.lock"
else
break
fi
done
rm -f "${arkserverroot}/.ark-update.lock.$$"
if [ -n "$modupdate" ]; then if [ -n "$modupdate" ]; then
if ! doDownloadAllMods; then if ! doDownloadAllMods; then
modupdate= modupdate=
@ -843,6 +859,8 @@ doUpdate() {
echo "Your server is already up to date! The most recent version is ${bnumber}." echo "Your server is already up to date! The most recent version is ${bnumber}."
echo "`timestamp`: No update needed." >> "$logdir/update.log" echo "`timestamp`: No update needed." >> "$logdir/update.log"
fi; fi;
rm -f "${arkserverroot}/.ark-update.lock"
} }
# #