shell bypass 403
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mysqld_safe
#!/bin/sh # Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB # This file is public domain and comes with NO WARRANTY of any kind # # Script to start the MySQL daemon and restart it if it dies unexpectedly # # This should be executed in the MySQL base directory if you are using a # binary installation that is not installed in its compile-time default # location # # mysql.server works by first doing a cd to the base directory and from there # executing mysqld_safe # Initialize script globals KILL_MYSQLD=1; MYSQLD= niceness=0 mysqld_ld_preload= mysqld_ld_library_path= # Initial logging status: error log is not open, and not using syslog logging=init want_syslog=0 syslog_tag= user='mysql' pid_file= pid_file_append= err_log= err_log_append= timestamp_format=UTC syslog_tag_mysqld=mysqld syslog_tag_mysqld_safe=mysqld_safe syslog_facility=daemon trap '' 1 2 3 15 # we shouldn't let anyone kill us trap '' 13 # not even SIGPIPE # MySQL-specific environment variable. First off, it's not really a umask, # it's the desired mode. Second, it follows umask(2), not umask(3) in that # octal needs to be explicit. Our shell might be a proper sh without printf, # multiple-base arithmetic, and binary arithmetic, so this will get ugly. # We reject decimal values to keep things at least half-sane. umask 007 # fallback UMASK="${UMASK-0640}" fmode=`echo "$UMASK" | sed -e 's/[^0246]//g'` octalp=`echo "$fmode"|cut -c1` fmlen=`echo "$fmode"|wc -c|sed -e 's/ //g'` if [ "x$octalp" != "x0" -o "x$UMASK" != "x$fmode" -o "x$fmlen" != "x5" ] then fmode=0640 echo "UMASK must be a 3-digit mode with an additional leading 0 to indicate octal." >&2 echo "The first digit will be corrected to 6, the others may be 0, 2, 4, or 6." >&2 fi fmode=`echo "$fmode"|cut -c3-4` fmode="6$fmode" if [ "x$UMASK" != "x0$fmode" ] then echo "UMASK corrected from $UMASK to 0$fmode ..." fi defaults= case "$1" in --no-defaults|--defaults-file=*|--defaults-extra-file=*) defaults="$1"; shift ;; esac usage () { cat <<EOF Usage: $0 [OPTIONS] The following options may be given as the first argument: --no-defaults Don't read the system defaults file --defaults-file=FILE Use the specified defaults file --defaults-extra-file=FILE Also use defaults from the specified file Other options: --ledir=DIRECTORY Look for mysqld in the specified directory --open-files-limit=LIMIT Limit the number of open files --core-file-size=LIMIT Limit core files to the specified size --timezone=TZ Set the system timezone --malloc-lib=LIB Preload shared library LIB if available --mysqld=FILE Use the specified file as mysqld --mysqld-version=VERSION Use "mysqld-VERSION" as mysqld --nice=NICE Set the scheduling priority of mysqld --plugin-dir=DIR Plugins are under DIR or DIR/VERSION, if VERSION is given --skip-kill-mysqld Don't try to kill stray mysqld processes --syslog Log messages to syslog with 'logger' --skip-syslog Log messages to error log (default) --syslog-tag=TAG Pass -t "mysqld-TAG" to 'logger' --mysqld-safe-log- TYPE must be one of UTC (ISO 8601 UTC), timestamps=TYPE system (ISO 8601 local time), hyphen (hyphenated date a la mysqld 5.6), legacy (legacy non-ISO 8601 mysqld_safe timestamps) All other options are passed to the mysqld program. EOF exit 1 } my_which () { save_ifs="${IFS-UNSET}" IFS=: ret=0 for file do for dir in $PATH do if [ -f "$dir/$file" ] then echo "$dir/$file" continue 2 fi done ret=1 #signal an error break done if [ "$save_ifs" = UNSET ] then unset IFS else IFS="$save_ifs" fi return $ret # Success } log_generic () { priority="$1" shift msg="`eval $DATE` mysqld_safe $*" echo "$msg" case $logging in init) ;; # Just echo the message, don't save it anywhere file) if [ -w / -o "$USER" = "root" ]; then true else echo "$msg" >> "$err_log" fi ;; syslog) logger -t "$syslog_tag_mysqld_safe" -p "$priority" "$*" ;; both) if [ -w / -o "$USER" = "root" ]; then true else echo "$msg" >> "$err_log" fi logger -t "$syslog_tag_mysqld_safe" -p "$priority" "$*" ;; *) echo "Internal program error (non-fatal):" \ " unknown logging method '$logging'" >&2 ;; esac } log_error () { log_generic ${syslog_facility}.error "$@" >&2 } log_notice () { log_generic ${syslog_facility}.notice "$@" } eval_log_error () { cmd="$1" case $logging in file) if [ -w / -o "$USER" = "root" ]; then cmd="$cmd > /dev/null 2>&1" else cmd="$cmd >> "`shell_quote_string "$err_log"`" 2>&1" fi ;; syslog) cmd="$cmd --log-syslog=1 --log-syslog-facility=$syslog_facility '--log-syslog-tag=$syslog_tag' > /dev/null 2>&1" ;; both) if [ -w / -o "$USER" = "root" ]; then cmd="$cmd --log-syslog=1 --log-syslog-facility=$syslog_facility '--log-syslog-tag=$syslog_tag' > /dev/null 2>&1" else cmd="$cmd --log-syslog=1 --log-syslog-facility=$syslog_facility '--log-syslog-tag=$syslog_tag' >> "`shell_quote_string "$err_log"`" 2>&1" fi ;; *) echo "Internal program error (non-fatal):" \ " unknown logging method '$logging'" >&2 ;; esac #echo "Running mysqld: [$cmd]" cmd="env MYSQLD_PARENT_PID=$$ $cmd" eval "$cmd" } shell_quote_string() { # This sed command makes sure that any special chars are quoted, # so the arg gets passed exactly to the server. echo "$1" | sed -e 's,\([^a-zA-Z0-9/_.=-]\),\\\1,g' } parse_arguments() { # We only need to pass arguments through to the server if we don't # handle them here. So, we collect unrecognized options (passed on # the command line) into the args variable. pick_args= if test "$1" = PICK-ARGS-FROM-ARGV then pick_args=1 shift fi for arg do # the parameter after "=", or the whole $arg if no match val=`echo "$arg" | sed -e 's;^--[^=]*=;;'` # what's before "=", or the whole $arg if no match optname=`echo "$arg" | sed -e 's/^\(--[^=]*\)=.*$/\1/'` # replace "_" by "-" ; mysqld_safe must accept "_" like mysqld does. optname_subst=`echo "$optname" | sed 's/_/-/g'` arg=`echo $arg | sed "s/^$optname/$optname_subst/"` case "$arg" in # these get passed explicitly to mysqld --basedir=*) MY_BASEDIR_VERSION="$val" ;; --datadir=*) case $val in /) DATADIR=$val ;; *) DATADIR="`echo $val | sed 's;/*$;;'`" ;; esac ;; --pid-file=*) pid_file="$val" ;; --plugin-dir=*) PLUGIN_DIR="$val" ;; --user=*) user="$val"; SET_USER=1 ;; # these might have been set in a [mysqld_safe] section of my.cnf # they are added to mysqld command line to override settings from my.cnf --log-error=*) err_log="$val" ;; --port=*) mysql_tcp_port="$val" ;; --socket=*) mysql_unix_port="$val" ;; # mysqld_safe-specific options - must be set in my.cnf ([mysqld_safe])! --core-file-size=*) core_file_size="$val" ;; --ledir=*) if [ -z "$pick_args" ]; then log_error "--ledir option can only be used as command line option, found in config file" exit 1 fi ledir="$val" ;; --malloc-lib=*) set_malloc_lib "$val" ;; --mysqld=*) if [ -z "$pick_args" ]; then log_error "--mysqld option can only be used as command line option, found in config file" exit 1 fi MYSQLD="$val" ;; --mysqld-version=*) if [ -z "$pick_args" ]; then log_error "--mysqld-version option can only be used as command line option, found in config file" exit 1 fi if test -n "$val" then MYSQLD="mysqld-$val" PLUGIN_VARIANT="/$val" else MYSQLD="mysqld" fi ;; --nice=*) niceness="$val" ;; --open-files-limit=*) open_files="$val" ;; --open_files_limit=*) open_files="$val" ;; --skip-kill-mysqld*) KILL_MYSQLD=0 ;; --mysqld-safe-log-timestamps=*) timestamp_format="$val" ;; --syslog) want_syslog=1 ;; --skip-syslog) want_syslog=0 ;; --syslog-tag=*) syslog_tag="$val" ;; --timezone=*) TZ="$val"; export TZ; ;; --help) usage ;; *) if test -n "$pick_args" then append_arg_to_args "$arg" fi ;; esac done } # Add a single shared library to the list of libraries which will be added to # LD_PRELOAD for mysqld # # Since LD_PRELOAD is a space-separated value (for historical reasons), if a # shared lib's path contains spaces, that path will be prepended to # LD_LIBRARY_PATH and stripped from the lib value. add_mysqld_ld_preload() { lib_to_add="$1" log_notice "Adding '$lib_to_add' to LD_PRELOAD for mysqld" case "$lib_to_add" in *' '*) # Must strip path from lib, and add it to LD_LIBRARY_PATH lib_file=`basename "$lib_to_add"` case "$lib_file" in *' '*) # The lib file itself has a space in its name, and can't # be used in LD_PRELOAD log_error "library name '$lib_to_add' contains spaces and can not be used with LD_PRELOAD" exit 1 ;; esac lib_path=`dirname "$lib_to_add"` lib_to_add="$lib_file" [ -n "$mysqld_ld_library_path" ] && mysqld_ld_library_path="$mysqld_ld_library_path:" mysqld_ld_library_path="$mysqld_ld_library_path$lib_path" ;; esac # LD_PRELOAD is a space-separated [ -n "$mysqld_ld_preload" ] && mysqld_ld_preload="$mysqld_ld_preload " mysqld_ld_preload="${mysqld_ld_preload}$lib_to_add" } # Returns LD_PRELOAD (and LD_LIBRARY_PATH, if needed) text, quoted to be # suitable for use in the eval that calls mysqld. # # All values in mysqld_ld_preload are prepended to LD_PRELOAD. mysqld_ld_preload_text() { text= if [ -n "$mysqld_ld_preload" ]; then new_text="$mysqld_ld_preload" [ -n "$LD_PRELOAD" ] && new_text="$new_text $LD_PRELOAD" text="${text}LD_PRELOAD="`shell_quote_string "$new_text"`' ' fi if [ -n "$mysqld_ld_library_path" ]; then new_text="$mysqld_ld_library_path" [ -n "$LD_LIBRARY_PATH" ] && new_text="$new_text:$LD_LIBRARY_PATH" text="${text}LD_LIBRARY_PATH="`shell_quote_string "$new_text"`' ' fi echo "$text" } # set_malloc_lib LIB # - If LIB is empty, do nothing and return # - If LIB is an absolute path, assume it is a malloc shared library # # Put LIB in mysqld_ld_preload, which will be added to LD_PRELOAD when # running mysqld. See ld.so for details. set_malloc_lib() { # This list is kept intentionally simple. malloc_dirs="/usr/lib /usr/lib64 /usr/lib/i386-linux-gnu /usr/lib/x86_64-linux-gnu" malloc_lib="$1" # Allow --malloc-lib='' to override other settings [ -z "$malloc_lib" ] && return case "$malloc_lib" in /*) if [ ! -r "$malloc_lib" ]; then log_error "--malloc-lib can not be read and will not be used" exit 1 fi # Restrict to a the list in $malloc_dirs above case "`dirname "$malloc_lib"`" in /usr/lib) ;; /usr/lib64) ;; /usr/lib/i386-linux-gnu) ;; /usr/lib/x86_64-linux-gnu) ;; *) log_error "--malloc-lib must be located in one of the directories: $malloc_dirs" exit 1 ;; esac ;; *) log_error "--malloc-lib must be an absolute path ignoring value '$malloc_lib'" exit 1 ;; esac add_mysqld_ld_preload "$malloc_lib" } find_basedir_from_cmdline () { for arg in "$@"; do case $arg in --basedir=*) MY_BASEDIR_VERSION="`echo "$arg" | sed -e 's;^--[^=]*=;;'`" # Convert to full path cd "$MY_BASEDIR_VERSION" if [ $? -ne 0 ] ; then log_error "--basedir set to '$MY_BASEDIR_VERSION', however could not access directory" exit 1 fi MY_BASEDIR_VERSION="`pwd`" ;; esac done } # # First, try to find BASEDIR and ledir (where mysqld is) # oldpwd="`pwd`" # Args not parsed yet, check if --basedir was given on command line find_basedir_from_cmdline "$@" # --basedir is already overridden on command line if test -n "$MY_BASEDIR_VERSION" -a -d "$MY_BASEDIR_VERSION" ; then # Search for mysqld and set ledir for dir in sbin libexec sbin bin ; do if test -x "$MY_BASEDIR_VERSION/$dir/mysqld" ; then ledir="$MY_BASEDIR_VERSION/$dir" break fi done else # Basedir should be parent dir of bindir, unless some non-standard # layout is used cd "`dirname $0`" if [ -h "$0" ] ; then realpath="`ls -l "$0" | awk '{print $NF}'`" cd "`dirname "$realpath"`" fi cd .. MY_PWD="`pwd`" # Search for mysqld and set ledir and BASEDIR for dir in sbin libexec sbin bin ; do if test -x "$MY_PWD/$dir/mysqld" ; then MY_BASEDIR_VERSION="$MY_PWD" ledir="$MY_BASEDIR_VERSION/$dir" break fi done # If we still didn't find anything, use the compiled-in defaults if test -z "$MY_BASEDIR_VERSION" ; then MY_BASEDIR_VERSION='/usr' ledir='/usr/sbin' fi fi # # Second, try to find the data directory # # Try where the binary installs put it if test -d $MY_BASEDIR_VERSION/data/mysql then DATADIR=$MY_BASEDIR_VERSION/data # Or just give up and use our compiled-in default else DATADIR=/var/lib/mysql fi if test -z "$MYSQL_HOME" then MYSQL_HOME=$MY_BASEDIR_VERSION fi export MYSQL_HOME # Get first arguments from the my.cnf file, groups [mysqld] and [mysqld_safe] # and then merge with the command line arguments if test -x "$MY_BASEDIR_VERSION/bin/my_print_defaults" ; then print_defaults="$MY_BASEDIR_VERSION/bin/my_print_defaults" elif test -x "/usr/bin/my_print_defaults" ; then print_defaults="/usr/bin/my_print_defaults" else print_defaults="my_print_defaults" fi append_arg_to_args () { args="$args "`shell_quote_string "$1"` } args= cd "$oldpwd" SET_USER=2 parse_arguments `$print_defaults $defaults --loose-verbose mysqld server` if test $SET_USER -eq 2 then SET_USER=0 fi parse_arguments `$print_defaults $defaults --loose-verbose mysqld_safe safe_mysqld` parse_arguments PICK-ARGS-FROM-ARGV "$@" # # Sort out date command from $timestamp_format early so we'll start off # with correct log messages. # case "$timestamp_format" in UTC|utc) DATE="date -u +%Y-%m-%dT%H:%M:%S.%06NZ";; SYSTEM|system) DATE="date +%Y-%m-%dT%H:%M:%S.%06N%:z";; HYPHEN|hyphen) DATE="date +'%Y-%m-%d %H:%M:%S'";; LEGACY|legacy) DATE="date +'%y%m%d %H:%M:%S'";; *) DATE="date -u +%Y-%m-%dT%H:%M:%S.%06NZ"; log_error "unknown data format $timestamp_format, using UTC";; esac # # Try to find the plugin directory # # Use user-supplied argument if [ -n "${PLUGIN_DIR}" ]; then plugin_dir="${PLUGIN_DIR}" else # Try to find plugin dir relative to basedir for dir in lib64/mysql/plugin lib64/plugin lib/mysql/plugin lib/plugin do if [ -d "${MY_BASEDIR_VERSION}/${dir}" ]; then plugin_dir="${MY_BASEDIR_VERSION}/${dir}" break fi done # Give up and use compiled-in default if [ -z "${plugin_dir}" ]; then plugin_dir='/usr/lib/mysql/plugin' fi fi plugin_dir="${plugin_dir}${PLUGIN_VARIANT}" # Determine what logging facility to use # Ensure that 'logger' exists, if it's requested if [ $want_syslog -eq 1 ] then my_which logger > /dev/null 2>&1 if [ $? -ne 0 ] then log_error "--syslog requested, but no 'logger' program found. Please ensure that 'logger' is in your PATH, or do not specify the --syslog option to mysqld_safe." exit 1 fi fi if [ $want_syslog -eq 1 ] then if [ -n "$syslog_tag" ] then # Sanitize the syslog tag syslog_tag=`echo "$syslog_tag" | sed -e 's/[^a-zA-Z0-9_-]/_/g'` syslog_tag_mysqld_safe="${syslog_tag_mysqld_safe}-$syslog_tag" syslog_tag_mysqld="${syslog_tag_mysqld}-$syslog_tag" fi log_notice "Logging to syslog." logging=syslog fi if [ -n "$err_log" -o $want_syslog -eq 0 ] then if [ -n "$err_log" ] then # mysqld adds ".err" if there is no extension on the --log-error # argument; must match that here, or mysqld_safe will write to a # different log file than mysqld # mysqld does not add ".err" to "--log-error=foo."; it considers a # trailing "." as an extension if expr "$err_log" : '.*\.[^/]*$' > /dev/null then : else err_log="$err_log".err fi err_log_append="$err_log" case "$err_log" in /* ) ;; ./*|../*) # Preparing absolute path from the relative path value specified for the # --log-error argument. # # Absolute path will be prepared for the value of following form # ./bar/foo OR # ../old_bar/foo # for --log-error argument. # # Note: If directory of log file name does not exists or # if write or execute permissions are missing on directory then # --log-error is set $DATADIR/`hostname`.err log_dir_name="$(dirname "$err_log")"; if [ ! -d "$log_dir_name" ] then log_notice "Directory "$log_dir_name" does not exists."; err_log=$DATADIR/`hostname`.err elif [ ! -x "$log_dir_name" -o ! -w "$log_dir_name" ] then log_notice "Do not have Execute or Write permissions on directory "$log_dir_name"."; err_log=$DATADIR/`hostname`.err else err_log=$(cd $log_dir_name && pwd -P)/$(basename "$err_log") fi ;; * ) err_log="$DATADIR/$err_log" ;; esac else err_log=$DATADIR/`hostname`.err err_log_append=`hostname`.err fi append_arg_to_args "--log-error=$err_log_append" if [ $want_syslog -eq 1 ] then logging=both else logging=file fi fi logdir=`dirname "$err_log"` # Change the err log to the right user, if possible and it is in use if [ $logging = "file" -o $logging = "both" ]; then if [ ! -e "$err_log" -a ! -h "$err_log" ]; then if test -w / -o "$USER" = "root"; then case $logdir in /var/log) ( umask 0137 set -o noclobber > "$err_log" && chown $user "$err_log" ) ;; *) ;; esac else ( umask 0137 set -o noclobber > "$err_log" ) fi fi if [ -f "$err_log" -o -p "$err_log" ]; then # Log to err_log file log_notice "Logging to '$err_log'." elif [ "x$user" = "xroot" ]; then # running as root, mysqld can create log file; continue echo "Logging to '$err_log'." >&2 else case $logdir in # We can't create $err_log, however mysqld can; continue /tmp|/var/tmp|/var/log/mysql|$DATADIR) echo "Logging to '$err_log'." >&2 ;; # We can't create $err_log and don't know if mysqld can; error out *) log_error "error: log-error set to '$err_log', however file don't exists. Create writable for user '$user'." exit 1 ;; esac fi fi USER_OPTION="" if test -w / -o "$USER" = "root" then if test "$user" != "root" -o $SET_USER = 1 then USER_OPTION="--user=$user" fi if test -n "$open_files" then ulimit -n $open_files fi fi if test -n "$open_files" then append_arg_to_args "--open-files-limit=$open_files" fi safe_mysql_unix_port=${mysql_unix_port:-${MYSQL_UNIX_PORT:-/var/run/mysqld/mysqld.sock}} # Check that directory for $safe_mysql_unix_port exists mysql_unix_port_dir=`dirname $safe_mysql_unix_port` if [ ! -d $mysql_unix_port_dir ] then log_error "Directory '$mysql_unix_port_dir' for UNIX socket file don't exists." exit 1 fi # If the user doesn't specify a binary, we assume name "mysqld" if test -z "$MYSQLD" then MYSQLD=mysqld fi if test ! -x "$ledir/$MYSQLD" then log_error "The file $ledir/$MYSQLD does not exist or is not executable. Please cd to the mysql installation directory and restart this script from there as follows: ./bin/mysqld_safe& See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information" exit 1 fi if test -z "$pid_file" then pid_file="$DATADIR/`hostname`.pid" pid_file_append="`hostname`.pid" else pid_file_append="$pid_file" case "$pid_file" in /* ) ;; * ) pid_file="$DATADIR/$pid_file" ;; esac fi append_arg_to_args "--pid-file=$pid_file_append" if test -n "$mysql_unix_port" then append_arg_to_args "--socket=$mysql_unix_port" fi if test -n "$mysql_tcp_port" then append_arg_to_args "--port=$mysql_tcp_port" fi if test $niceness -eq 0 then NOHUP_NICENESS="nohup" else NOHUP_NICENESS="nohup nice -$niceness" fi # Using nice with no args to get the niceness level is GNU-specific. # This check could be extended for other operating systems (e.g., # BSD could use "nohup sh -c 'ps -o nice -p $$' | tail -1"). # But, it also seems that GNU nohup is the only one which messes # with the priority, so this is okay. if nohup nice > /dev/null 2>&1 then normal_niceness=`nice` nohup_niceness=`nohup nice 2>/dev/null` numeric_nice_values=1 for val in $normal_niceness $nohup_niceness do case "$val" in -[0-9] | -[0-9][0-9] | -[0-9][0-9][0-9] | \ [0-9] | [0-9][0-9] | [0-9][0-9][0-9] ) ;; * ) numeric_nice_values=0 ;; esac done if test $numeric_nice_values -eq 1 then nice_value_diff=`expr $nohup_niceness - $normal_niceness` if test $? -eq 0 && test $nice_value_diff -gt 0 && \ nice --$nice_value_diff echo testing > /dev/null 2>&1 then # nohup increases the priority (bad), and we are permitted # to lower the priority with respect to the value the user # might have been given niceness=`expr $niceness - $nice_value_diff` NOHUP_NICENESS="nice -$niceness nohup" fi fi else if nohup echo testing > /dev/null 2>&1 then : else # nohup doesn't work on this system NOHUP_NICENESS="" fi fi # Try to set the core file size (even if we aren't root) because many systems # don't specify a hard limit on core file size. if test -n "$core_file_size" then ulimit -c $core_file_size fi # # If there exists an old pid file, check if the daemon is already running # Note: The switches to 'ps' may depend on your operating system if test -f "$pid_file" then PID=`cat "$pid_file"` if kill -0 $PID > /dev/null 2> /dev/null then if ps wwwp $PID | grep -v mysqld_safe | grep -- $MYSQLD > /dev/null then # The pid contains a mysqld process log_error "A mysqld process already exists" exit 1 fi fi if [ ! -h "$pid_file" ]; then rm -f "$pid_file" if test -f "$pid_file"; then log_error "Fatal error: Can't remove the pid file: $pid_file. Please remove the file manually and start $0 again; mysqld daemon not started" exit 1 fi fi if [ ! -h "$safe_mysql_unix_port" ]; then rm -f "$safe_mysql_unix_port" if test -f "$safe_mysql_unix_port"; then log_error "Fatal error: Can't remove the socket file: $safe_mysql_unix_port. Please remove the file manually and start $0 again; mysqld daemon not started" exit 1 fi fi if [ ! -h "$pid_file.shutdown" ]; then rm -f "$pid_file.shutdown" if test -f "$pid_file.shutdown"; then log_error "Fatal error: Can't remove the shutdown file: $pid_file.shutdown. Please remove the file manually and start $0 again; mysqld daemon not started" exit 1 fi fi fi # # Uncomment the following lines if you want all tables to be automatically # checked and repaired during startup. You should add sensible key_buffer # and sort_buffer values to my.cnf to improve check performance or require # less disk space. # Alternatively, you can start mysqld with the "myisam-recover" option. See # the manual for details. # # echo "Checking tables in $DATADIR" # $MY_BASEDIR_VERSION/bin/myisamchk --silent --force --fast --medium-check $DATADIR/*/*.MYI # $MY_BASEDIR_VERSION/bin/isamchk --silent --force $DATADIR/*/*.ISM # Does this work on all systems? #if type ulimit | grep "shell builtin" > /dev/null #then # ulimit -n 256 > /dev/null 2>&1 # Fix for BSD and FreeBSD systems #fi cmd="`mysqld_ld_preload_text`$NOHUP_NICENESS" for i in "$ledir/$MYSQLD" "$defaults" "--basedir=$MY_BASEDIR_VERSION" \ "--datadir=$DATADIR" "--plugin-dir=$plugin_dir" "$USER_OPTION" do cmd="$cmd "`shell_quote_string "$i"` done cmd="$cmd $args" # Avoid 'nohup: ignoring input' warning test -n "$NOHUP_NICENESS" && cmd="$cmd < /dev/null" log_notice "Starting $MYSQLD daemon with databases from $DATADIR" # variable to track the current number of "fast" (a.k.a. subsecond) restarts fast_restart=0 # maximum number of restarts before throttling kicks in max_fast_restarts=5 # flag whether a usable sleep command exists have_sleep=1 while true do start_time=`date +%M%S` eval_log_error "$cmd" if [ $? -eq 16 ] ; then dont_restart_mysqld=false echo "Restarting mysqld..." else dont_restart_mysqld=true fi # hypothetical: log was renamed but not # flushed yet. we'd recreate it with # wrong owner next time we log, so set # it up correctly while we can! if [ $want_syslog -eq 0 -a ! -f "$err_log" -a ! -h "$err_log" ]; then if test -w / -o "$USER" = "root"; then logdir=`dirname "$err_log"` case $logdir in /var/log) ( umask 0137 set -o noclobber > "$err_log" && chown $user "$err_log" ) ;; *) ;; esac else ( umask 0137 set -o noclobber > "$err_log" ) fi fi end_time=`date +%M%S` if $dont_restart_mysqld; then if test ! -f "$pid_file" # This is removed if normal shutdown then break else # self's mysqld crashed or other's mysqld running PID=`cat "$pid_file"` if kill -0 $PID > /dev/null 2> /dev/null then # true when above pid belongs to a running mysqld process log_error "A mysqld process with pid=$PID is already running. Aborting!!" exit 1 fi fi fi if test -f "$pid_file.shutdown" # created to signal that it must stop then log_notice "$pid_file.shutdown present. The server will not restart." break fi # sanity check if time reading is sane and there's sleep if test $end_time -gt 0 -a $have_sleep -gt 0 then # throttle down the fast restarts if test $end_time -eq $start_time then fast_restart=`expr $fast_restart + 1` if test $fast_restart -ge $max_fast_restarts then log_notice "The server is respawning too fast. Sleeping for 1 second." sleep 1 sleep_state=$? if test $sleep_state -gt 0 then log_notice "The server is respawning too fast and in addition no working 'sleep' command was found. Turning off throttling." have_sleep=0 fi fast_restart=0 fi else fast_restart=0 fi fi if true && test $KILL_MYSQLD -eq 1 then # Test if one process was hanging. # This is only a fix for Linux (running as base 3 mysqld processes) # but should work for the rest of the servers. # The only thing is ps x => redhat 5 gives warnings when using ps -x. # kill -9 is used or the process won't react on the kill. numofproces=`ps xaww | grep -v "grep" | grep "$ledir/$MYSQLD\>" | grep -c "pid-file=$pid_file"` log_notice "Number of processes running now: $numofproces" I=1 while test "$I" -le "$numofproces" do PROC=`ps xaww | grep "$ledir/$MYSQLD\>" | grep -v "grep" | grep "pid-file=$pid_file" | sed -n '$p'` for T in $PROC do break done # echo "TEST $I - $T **" if kill -9 $T then log_error "$MYSQLD process hanging, pid $T - killed" else break fi I=`expr $I + 1` done fi if [ ! -h "$pid_file" ]; then rm -f "$pid_file" fi if [ ! -h "$safe_mysql_unix_port" ]; then rm -f "$safe_mysql_unix_port" fi if [ ! -h "$pid_file.shutdown" ]; then rm -f "$pid_file.shutdown" fi log_notice "mysqld restarted" done if [ ! -h "$pid_file.shutdown" ]; then rm -f "$pid_file.shutdown" fi log_notice "mysqld from pid file $pid_file ended" if [ ! -h "$safe_pid" ]; then rm -f "$safe_pid" # Some Extra Safety. File is deleted fi # once the mysqld process ends.
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