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