57 lines
1.7 KiB
Plaintext
57 lines
1.7 KiB
Plaintext
|
#!/bin/sh
|
||
|
|
|
||
|
|
# 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.
|
||
|
|
|
||
|
|
# Service file passes us the daemon's PID (actually, mysqld_safe's PID)
|
||
|
|
daemon_pid="$1"
|
||
|
|
|
||
|
|
# extract value of a MySQL option from config files
|
||
|
|
# Usage: get_mysql_option SECTION VARNAME DEFAULT
|
||
|
|
# result is returned in $result
|
||
|
|
# We use my_print_defaults which prints all options from multiple files,
|
||
|
|
# with the more specific ones later; hence take the last match.
|
||
|
|
get_mysql_option(){
|
||
|
|
result=`/usr/bin/my_print_defaults "$1" | sed -n "s/^--$2=//p" | tail -n 1`
|
||
|
|
if [ -z "$result" ]; then
|
||
|
|
# not found, use default
|
||
|
|
result="$3"
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
# Defaults here had better match what mysqld_safe will default to
|
||
|
|
get_mysql_option mysqld datadir "/var/lib/mysql"
|
||
|
|
datadir="$result"
|
||
|
|
get_mysql_option mysqld socket "$datadir/mysql.sock"
|
||
|
|
socketfile="$result"
|
||
|
|
|
||
|
|
# Wait for the server to come up or for the mysqld process to disappear
|
||
|
|
ret=0
|
||
|
|
while /bin/true; do
|
||
|
|
RESPONSE=`/usr/bin/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 $mret -ne 11 ]; then
|
||
|
|
ret=1
|
||
|
|
break
|
||
|
|
fi
|
||
|
|
# "Access denied" also means the server is alive
|
||
|
|
echo "$RESPONSE" | grep -q "Access denied for user" && break
|
||
|
|
|
||
|
|
# Check process still exists
|
||
|
|
if ! /bin/kill -0 $daemon_pid 2>/dev/null; then
|
||
|
|
ret=1
|
||
|
|
break
|
||
|
|
fi
|
||
|
|
sleep 1
|
||
|
|
done
|
||
|
|
|
||
|
|
exit $ret
|