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#!/bin/sh /etc/rc.common
# Copyright (C) 2010-2018 OpenWrt.org
# shellcheck disable=SC2034
START=95
# shellcheck disable=SC2034
STOP=10
# shellcheck disable=SC2034
USE_PROCD=1
NAME=mysqld
LOGGER="/usr/bin/logger -p user.err -s -t $NAME --"
[ -x "$LOGGER" ] || LOGGER="echo"
MYSQLD="/usr/bin/$NAME"
pidfile=""
# mysqladmin likes to read /root/.my.cnf which could cause issues.
export HOME="/etc/mysql"
# Safeguard (relative paths, core dumps...)
cd /
mysqld_get_param() {
"$MYSQLD" --help --verbose | sed -n 's|^'"$1"'[[:blank:]]\+||p'
}
# Send kill signal to MariaDB process
#
# Usage: boolean mysqld_kill signal
mysql_kill() {
[ -n "$pidfile" ] || pidfile="$(mysqld_get_param pid-file)"
[ -f "$pidfile" ] || return 1
pid="$(cat "$pidfile")"
[ -n "$pid" ] || return 2
kill "$1" "$pid"
}
# Checks if a server is running and accessible.
#
# Supported modes are 'check_alive' and 'check_dead'.
# Both check for pidfile and whether the specified process is running and is
# indeed mysqld. We could use mysqladmin for the check, but to be able to do
# so, mysqladmin requires access to the database, which sounds like overkill
# and potential security issue.
#
# Usage: boolean mysqld_status [check_alive|check_dead]
mysqld_status() {
ps_alive=0
pidfile="$(mysqld_get_param pid-file)"
if [ -f "$pidfile" ] && mysql_kill -0 2> /dev/null && \
[ "$(readlink "/proc/$(cat "$pidfile")/exe")" = "$MYSQLD" ]; then
ps_alive=1
fi
if { [ "$1" = check_alive ] && [ $ps_alive = 1 ]; } || \
{ [ "$1" = check_dead ] && [ $ps_alive = 0 ]; }
then
return 0 # EXIT_SUCCESS
else
return 1 # EXIT_FAILURE
fi
}
start_service() {
conf=/etc/mysql/my.cnf
logdir=/var/log/mysql
rundir=/var/run/mysqld
version="$(mysqld --version | sed -n 's|.*Ver[[:blank:]]*\([0-9.]*\)-.*|\1|p')"
# Few basic checks
if [ ! -x "$MYSQLD" ]; then
$LOGGER "$MYSQLD is missing"
exit 1
fi
if [ -z "$version" ]; then
$LOGGER "Can't get MariaDB version, something is seriously wrong"
exit 1
fi
if [ ! -r "$conf" ]; then
$LOGGER "$conf cannot be read"
exit 1
fi
if mysqld_status check_alive; then
$LOGGER "server is already running"
exit 0
fi
# Get various config options
config_load "$NAME"
config_get my_user general user "mariadb"
config_get my_group general group "mariadb"
config_get_bool enabled general enabled 0
config_get_bool init_db general init 1
config_get_bool autoupgrade general upgrade 1
config_get options general options
# shellcheck disable=SC2154
if [ "$enabled" -eq 0 ]; then
$LOGGER "service not enabled in /etc/config/$NAME"
exit 1
fi
datadir="$(mysqld_get_param datadir)"
tmpdir="$(mysqld_get_param tmpdir)"
sockdir="$(dirname "$(mysqld_get_param socket)")"
# Make sure we have a working database in datadir
if [ ! -f "$datadir/mysql/tables_priv.MAD" ]; then
args="--force"
basedir="$(mysqld_get_param basedir)"
[ -n "$basedir" ] && args="$args --basedir=$basedir"
# shellcheck disable=SC2154
if [ "$init_db" -gt 0 ]; then
# shellcheck disable=SC2154
mysql_install_db $args --skip-name-resolve --skip-test-db --datadir="$datadir" || exit 1
echo "$version" > "$datadir"/.version
chown -Rh "$my_user:$my_group" "$datadir"
else
$LOGGER "Cannot detect privileges table. You might need to run"
$LOGGER "'mysql_install_db \"$args\"'"
$LOGGER "to initialize the system tables."
$LOGGER "Then hand it ower to MariaDB user"
# shellcheck disable=SC2154
$LOGGER "'chown -Rh \"$my_user:$my_group\" \"$datadir\"'"
exit 1
fi
fi
# Make sure all required directories exists and have correct rights
for i in "$logdir" "$rundir" "$sockdir"; do
opts="-m 0750"
if ! [ -e "$i" ]; then
# $rundir needs to be accessible for
# clients
if [ "$i" = "$rundir" ]; then
opts=
fi
# shellcheck disable=SC2086
mkdir -p $opts "$i"
fi
# shellcheck disable=SC2154
[ -d "$i" ] && chown -Rh "$my_user:$my_group" "$i"
done
# Migration from old versions
# shellcheck disable=SC2154
if [ "$(cat "$datadir"/.version 2> /dev/null)" \!= "$version" ] && [ "$autoupgrade" -gt 0 ]; then
# Check for correct owner
local owner="$(stat --format %U:%G "$datadir" 2> /dev/null)"
if [ -n "$owner" ] && [ "$owner" != "$my_user:$my_group" ]; then
chown -Rh "$my_user:$my_group" "$datadir"
fi
# Start upgrade instance without credentials
sudo -u "$my_user" mysqld --skip-networking --skip-grant-tables --socket=/tmp/mysql_upgrade.sock &
PID="$!"
i=0
# Wait for upgrade instance of db to start
while [ "$i" -lt 15 ] && test \! -S /tmp/mysql_upgrade.sock; do
sleep 1
i="$((i + 1))"
done
[ -S /tmp/mysql_upgrade.sock ] || {
$LOGGER "Failed to start upgrading instance of MariaDB."
exit 1
}
# Upgrade the database
mysql_upgrade --upgrade-system-tables --socket=/tmp/mysql_upgrade.sock
echo "$version" > "$datadir"/.version
# Stop the upgrade instance
kill "$PID"
i=0
while [ "$i" -lt 60 ] && grep -q mysql "/proc/$PID/cmdline"; do
sleep 1
[ "$i" -lt 30 ] || kill "$PID"
i="$((i + 1))"
done
# Use force
if grep -q mysql "/proc/$PID/cmdline"; then
kill -9 "$PID"
fi
fi
# Start daemon
procd_open_instance
# shellcheck disable=SC2154 disable=SC2086
procd_set_param command "$MYSQLD" $options
procd_set_param respawn "${respawn_threshold:-3600}" "${respawn_timeout:-5}" "${respawn_retry:-5}"
# run as user
procd_set_param user "$my_user"
# forward stderr to logd
procd_set_param stderr 1
# use HUP to reload
procd_set_param reload_signal HUP
# terminate using signals
procd_set_param term_timeout 60
procd_close_instance
}