Vim/etc/init.d/mysqld

/ETC/INIT.D is a general boot service that is stored in this directory

/ETC/RC.D startup configuration files and scripts

/ETC/INIT.D &/ETC/RC.D/INIT.D is the same directory with the same content
Implementation mechanism, in fact/etc/init.d is a symbolic link file, links to/etc/rc.d/init.d
You can see that by running the following command

[Email protected] ~]# ls-ld/etc/init.d
lrwxrwxrwx. 1 root root-Oct 2 12:15/ETC/INIT.D-RC.D/INIT.D

The method of establishment is:ln-s/etc/rc.d/init.d/etc/init.d

[Email protected]]# vim/etc/init.d/mysqld

1 #!/bin/sh
2 # Copyright abandoned 1996 TCX datakonsult AB & Monty program KB & Detron HB
3 # This file was public domain and comes with NO WARRANTY of any kind
4
5 # MySQL Daemon start/stop script.
6
7 # Usually this was put in/etc/init.d (at least on machines SYSV R4 based
8 # Systems) and linked To/etc/rc3.d/s99mysql And/etc/rc0.d/k01mysql.
9 # When the-is-done the MySQL server would be started
Ten # started and shut down when the systems goes down.
11
# Comments to support Chkconfig on RedHat Linux
# chkconfig:2345 64 36
# description:a very fast and reliable SQL database engine.
15
# Comments to support LSB init script conventions
# # # # BEGIN INIT INFO
# Provides:mysql
# Required-start: $local _fs $network $remote _fs
# should-start:ypbind NSCD LDAP ntpd xntpd
# required-stop: $local _fs $network $remote _fs
# Default-start:2 3 4 5
# default-stop:0 1 6
# Short-description:start and Stop MySQL
# Description:mysql is a very fast and reliable SQL database engine.
# # # # END INIT INFO
27
# If You install MySQL in some other places Than/usr/local/mysql
# of the following things for the.
30 #
#-Run This script from within the MySQL installation directory
#-Create a/etc/my.cnf file with the following information:
# [MYSQLD]
Basedir=<path-to-mysql-installation-directory> #
#-Add the above to any other configuration file (for example ~/.my.ini)
$ # and copy my_print_defaults To/usr/bin
PNS #-Add The path to the mysql-installation-directory to the Basedir variable
# below.
39 #
Want to affect other MySQL variables, you should make your changes
THE/ETC/MY.CNF, ~/.MY.CNF, or other MySQL configuration files.
42
# If You change base dir, you must also the change DataDir. These may get
# Overwritten by settings in the MySQL configuration files.
45
46
47Basedir=/usr/local/mysql
48Datadir=/data/mysql/data
49
# Default value, in seconds, afterwhich the script should timeout waiting
# for server start.
# Value: Overriden by value in MY.CNF.
# 0 means don ' t wait at all
# negative numbers mean to wait indefinitely
service_startup_timeout=900
56
# # Lock directory for Redhat/suse.
Lockdir= '/var/lock/subsys '
Lock_file_path= "$lockdir/mysql"
60
The following variables is only set for letting Mysql.server find things.
62
Defaults # Set Some
Mysqld_pid_file_path=
If Test-z "$basedir"
and then
Basedir=/usr/local/mysql
Bindir=/usr/local/mysql/bin
If Test-z "$datadir"
Then
Datadir=/usr/local/mysql/data
The fi
Sbindir=/usr/local/mysql/bin
Libexecdir=/usr/local/mysql/bin
All else
Bindir= "$basedir/bin"
If Test-z "$datadir"
Then
Datadir= "$basedir/data"
Fi
Bayi sbindir= "$basedir/sbin"
Libexecdir= "$basedir/libexec"
The fi
84
# Datadir_set is used to determine if datadir am set (and so should be
# *not* set inside of the--basedir= handler.)
datadir_set=
88
89 #
# Use LSB init script functions for printing messages, if possible
91 #
Lsb_functions= "/lib/lsb/init-functions"
If Test-f $lsb _functions; Then
94. $LSB _functions
On Else
Log_success_msg ()
97 {
98 echo "success! [Email protected] "
99}
Log_failure_msg ()
101 {
102 echo "error! [Email protected] "
103}
104 fi
105
106 path= "/sbin:/usr/sbin:/bin:/usr/bin: $basedir/bin"
107 Export PATH
108
109 Mode=$1 # Start or stop
110
111 [$#-ge 1] && shift
112
113
Other_args= "$*" # uncommon, but needed if called from an RPM upgrade action
# expected: "--skip-networking--skip-grant-tables"
They is not checked here, intentionally, as it is the resposibility
117 # of the "spec" file author to give correct arguments only.
118
119 case ' echo ' testing\c "', ' echo-n testing ' in
*c*,-n*) echo_n= echo_c=;
121 *c*,*) Echo_n=-n echo_c=;
122 *) echo_n= echo_c= ' \c ';;
123 Esac
124
Parse_server_arguments () {
126 for Arg do
127 case ' $arg ' in
--basedir=*) basedir= ' echo ' $arg | Sed-e ' s/^[^=]*=//'
129 bindir= "$basedir/bin"
If Test-z "$datadir _set"; Then
131 datadir= "$basedir/data"
The fi
133 sbindir= "$basedir/sbin"
134 libexecdir= "$basedir/libexec"
135;;
136--datadir=*) datadir= ' echo ' $arg | Sed-e ' s/^[^=]*=//'
137 Datadir_set=1
138;;
139--pid-file=*) Mysqld_pid_file_path= ' echo ' $arg | Sed-e ' s/^[^=]*=//';;
--service-startup-timeout=*) service_startup_timeout= ' echo ' $arg | Sed-e ' s/^[^=]*=//';;
141 Esac
142 Done
143}
144
145 wait_for_pid () {
146 verb= "$" # Created | Removed
147 pid= "$" # Process ID of the program operating on the Pid-file
148 pid_file_path= "$" # path to the PID file.
149
I=0
151 avoid_race_condition= "by checking again"
152
153 while Test $i-ne $service _startup_timeout; Do
154
155 case ' $verb ' in
156 ' created ')
157 # Wait for a pid-file to pops into existence.
158 test-s "$pid _file_path" && i= "&& break
159;;
' Removed ')
161 # Wait for this pid-file to disappear
162 Test! -S "$pid _file_path" && i= "&& break
163;;
164 *)
165 echo "Wait_for_pid () usage:wait_for_pid created|removed pid Pid_file_path"
166 Exit 1
167;;
168 ESAC
169
# if server isn ' t running, then pid-file'll never be updated
171 if Test-n "$pid"; Then
172 if kill-0 "$pid" 2>/dev/null; Then
173: # The server still runs
174 Else
175 # The server may have exited between, the last Pid-file check, and now.
176 if Test-n "$avoid _race_condition"; Then
177 avoid_race_condition= ""
178 Continue # Check again.
179 fi
180
181 # There's nothing that would affect the file.
182 log_failure_msg "The server quit without updating PID file ($pid _file_path)."
183 return 1 # not waiting any more.
184 fi
185 fi
186
187 echo $echo _n ". $echo _c"
188 i= ' expr $i + 1 '
189 Sleep 1
190
191 done
192
193 if Test-z "$i"; Then
194 log_success_msg
195 return 0
196 Else
197 Log_failure_msg
198 return 1
199 fi
200}
201
202 # Get arguments from the my.cnf file,
203 # The only group, which are read from now on IS [mysqld]
204 if Test-x./bin/my_print_defaults
205 Then
206 print_defaults= "./bin/my_print_defaults"
207 Elif Test-x $bindir/my_print_defaults
208 Then
209 print_defaults= "$bindir/my_print_defaults"
Elif test-x $bindir/mysql_print_defaults
211 Then
212 print_defaults= "$bindir/mysql_print_defaults"
213 Else
214 # Try to find Basedir in/etc/my.cnf
215conf=/etc/my.cnf
216 print_defaults=
217 If Test-r $conf
218 Then
219 subpat= ' ^[^=]*basedir[^=]*=\ (. *\) $ '
dirs= ' sed-e '/$subpat/!d "-e ' s//\1/' $conf '
221 for D in $dirs
222 do
223 d= ' echo $d | Sed-e ' s/[]//g '
224 if Test-x "$d/bin/my_print_defaults"
225 Then
226 print_defaults= "$d/bin/my_print_defaults"
227 Break
228 fi
229 if Test-x "$d/bin/mysql_print_defaults"
Then
231 print_defaults= "$d/bin/mysql_print_defaults"
232 Break
233 fi
234 done
235 fi
236
237 # Hope It's in the PATH ... but I doubt it
238 test-z "$print _defaults" && print_defaults= "My_print_defaults"
239 fi
240
241 #
242 # Read defaults file from ' Basedir '. If There is no defaults file there
243 # Check if it's in the old (depricated) place (DataDir) and read it from there
244 #
245
246 extra_args= ""
247 if Test-r "$basedir/my.cnf"
248 Then
249 extra_args= "-E $basedir/my.cnf"
+ Else
251 if Test-r "$datadir/my.cnf"
252 Then
253 extra_args= "-E $datadir/my.cnf"
254 fi
255 fi
256
257 parse_server_arguments ' $print _defaults $extra _args mysqld server Mysql_server mysql.server '
258
259 #
260 # Set PID file if not given
261 #
262 if test-z "$mysqld _pid_file_path"
263 Then
Mysqld_pid_file_path= $datadir/' hostname '. PID
265 Else
266 case ' $mysqld _pid_file_path ' in
267/*);;
268 *) mysqld_pid_file_path= "$datadir/$mysqld _pid_file_path";;
269 ESAC
The fi
271
272 case ' $mode ' in
273 ' start ')
274 # Start Daemon
275
276 # Safeguard (relative paths, core dumps ...)
277 CD $basedir
278
279 echo $echo _n "Starting MySQL"
280 If Test-x $bindir/mysqld_safe
281 Then
282 # Give extra arguments to mysqld with the my.cnf file. This script
283 # May is overwritten at next upgrade.
284 $bindir/mysqld_safe--datadir= "$datadir"--pid-file= "$mysqld _pid_file_path" $other _args >/dev/null 2>& 1 &
285 Wait_for_pid created "$!" "$mysqld _pid_file_path"; Return_value=$?
286
287 # Make lock for Redhat/suse
288 if test-w "$lockdir"
289 Then
290 Touch "$lock _file_path"
291 fi
292
293 Exit $return _value
294 Else
295 log_failure_msg "couldn ' t find MySQL server ($bindir/mysqld_safe)"
296 fi
297;;
298
299 ' Stop ')
# Stop Daemon. We use a signal here to avoid have to know the
301 # root Password.
302
303 if test-s "$mysqld _pid_file_path"
304 Then
305 mysqld_pid= ' cat ' $mysqld _pid_file_path "'
60S
307 if (kill-0 $mysqld _pid 2>/dev/null)
308 Then
309 echo $echo _n "shutting down MySQL"
310 Kill $mysqld _pid
311 # mysqld should remove the PID file when it exits, so wait for it.
312 Wait_for_pid removed "$mysqld _pid" "$mysqld _pid_file_path"; Return_value=$?
313 Else
314 log_failure_msg "MySQL server process # $mysqld _pid is not running!"
315 RM "$mysqld _pid_file_path"
The fi
317
318 # Delete Lock for Redhat/suse
319 if Test-f "$lock _file_path"
About
321 rm-f "$lock _file_path"
322 fi
323 exit $return _value
324 Else
325 log_failure_msg "MySQL server PID file could not be found!"
326 fi
327;;
328
329 ' restart ')
# Stop the service and regardless of whether it was
331 # Running or not, start it again.
332 If $ stop $other _args; Then
333 $ start $other _args
334 Else
335 log_failure_msg "Failed to stop running server, so refusing to try to start."
336 Exit 1
337 fi
338;;
339
340 ' Reload ' | ' Force-reload ')
341 if test-s "$mysqld _pid_file_path"; Then
342 Read Mysqld_pid < "$mysqld _pid_file_path"
343 kill-hup $mysqld _pid && log_success_msg "reloading service MySQL"
344 Touch "$mysqld _pid_file_path"
345 Else
346 log_failure_msg "MySQL PID file could not be found!"
347 Exit 1
348 fi
349;;
' Status ')
351 # First, check to see if PID file exists
352 if test-s "$mysqld _pid_file_path"; Then
353 Read Mysqld_pid < "$mysqld _pid_file_path"
354 if kill-0 $mysqld _pid 2>/dev/null; Then
355 log_success_msg "MySQL running ($mysqld _pid)"
356 Exit 0
357 Else
358 log_failure_msg "MySQL isn't running, but PID file exists"
359 Exit 1
The fi
361 Else
362 # Try to find appropriate mysqld process
363 mysqld_pid= ' pidof $libexecdir/mysqld '
364
365 # Test if multiple PIDs exist
366 pid_count= ' echo $mysqld _pid | Wc-w '
367 if test $pid _COUNT-GT 1; Then
368 log_failure_msg "multiple MySQL running but PID file could is found ($mysqld _pid)"
369 Exit 5
370 elif test-z $mysqld _pid; Then
371 if Test-f "$lock _file_path"; Then
372 log_failure_msg "MySQL isn't running, but lock file ($lock _file_path) exists"
373 Exit 2
374 fi
375 Log_failure_msg "MySQL is not running"
376 Exit 3
377 Else
378 Log_failure_msg "MySQL is running but PID file could not be found"
379 Exit 4
380 fi
381 fi
382;;
383 *)
384 # Usage
385 basename= ' basename '
386 echo "Usage: $basename {start|stop|restart|reload|force-reload|status} [MySQL server Options]"
387 Exit 1
388;;
389 ESAC
390
391 Exit 0

Vim/etc/init.d/mysqld