mysql/SOURCES/mysql-wait-ready.sh
2021-09-10 12:48:14 +00:00

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#!/bin/sh
source "`dirname ${BASH_SOURCE[0]}`/mysql-scripts-common"
# This script waits for mysqld to be ready to accept connections
# (which can be many seconds or even minutes after launch, if there's
# a lot of crash-recovery work to do).
# Running this as ExecStartPost is useful so that services declared as
# "After mysqld" won't be started until the database is really ready.
if [ $# -ne 1 ] ; then
echo "You need to pass daemon pid as an argument for this script."
exit 20
fi
# Service file passes us the daemon's PID (actually, mysqld_safe's PID)
daemon_pid="$1"
# Wait for the server to come up or for the mysqld process to disappear
ret=0
while /bin/true; do
# Check process still exists
if ! [ -d "/proc/${daemon_pid}" ] ; then
ret=1
break
fi
RESPONSE=`@bindir@/mysqladmin --no-defaults --socket="$socketfile" --user=UNKNOWN_MYSQL_USER ping 2>&1`
mret=$?
if [ $mret -eq 0 ] ; then
break
fi
# exit codes 1, 11 (EXIT_CANNOT_CONNECT_TO_SERVICE) are expected,
# anything else suggests a configuration error
if [ $mret -ne 1 -a $mret -ne 11 ]; then
echo "Cannot check for @NICE_PROJECT_NAME@ Daemon startup because of mysqladmin failure." >&2
ret=$mret
break
fi
# "Access denied" also means the server is alive
echo "$RESPONSE" | grep -q "Access denied for user" && break
sleep 1
done
exit $ret