diff options
Diffstat (limited to 'sysvinitfiles')
| -rw-r--r-- | sysvinitfiles | 87 |
1 files changed, 59 insertions, 28 deletions
diff --git a/sysvinitfiles b/sysvinitfiles index 3a39ed43..73dae34a 100644 --- a/sysvinitfiles +++ b/sysvinitfiles @@ -1,17 +1,20 @@ Writing System V init scripts for Red Hat Linux =============================================== -All System V init scripts are named /etc/init.d/<servicename> +All System V init scripts are named /etc/rc.d/init.d/<servicename> where <servicename> is the name of the service. There must be no ".init" suffix. +This path will very likely be moved to /etc/init.d in the future. +Once Red Hat Linux 7.0 is installed, you can access scripts as +/etc/init.d/<servicename>, via symlinks. Sample Script ============= #!/bin/bash # -# /etc/init.d/<servicename> +# /etc/rc.d/init.d/<servicename> # # <description of the *service*> # <any general comments about this init script> @@ -23,33 +26,47 @@ Sample Script # mistaken for tags, should they happen to fit the pattern.> # Source function library. -. /etc/init.d/functions +. /etc/rc.d/init.d/functions <define any local shell functions used by the code that follows> -case "$1" in - start) - echo -n "Starting <servicename> services: " +start() { + echo -n "Starting <servicename>: " <start daemons, perhaps with the daemon function> touch /var/lock/subsys/<servicename> - ;; - stop) - echo -n "Shutting down <servicename> services: " + return <return code of starting daemon> +} + +stop() { + echo -n "Shutting down <servicename>: " <stop daemons, perhaps with the killproc function> rm -f /var/lock/subsys/<servicename> + return <return code of stopping daemon> +} + +case "$1" in + start) + start + ;; + stop) + stop ;; status) <report the status of the daemons in free-form format, perhaps with the status function> ;; restart) - <restart the daemons, normally with $0 stop; $0 start> + stop + start ;; reload) <cause the service configuration to be reread, either with - kill -HUP or by restarting the daemons, possibly with - $0 stop; $0 start> + kill -HUP or by restarting the daemons, in a manner similar + to restart above> ;; + condrestart) + <Restarts the servce if it is already running. For example:> + [ -f /var/lock/subsys/<service> ] && restart || : probe) <optional. If it exists, then it should determine whether or not the service needs to be restarted or reloaded (or @@ -62,24 +79,39 @@ case "$1" in exit 1 ;; esac +exit $? +Notes: -Notes: the restart and reload functions may be (and commonly are) -combined into one test, vis: +- The restart and reload functions may be (and commonly are) + combined into one test, vis: restart|reload) -You are not prohibited from adding other commands; list all commands -which you intend to be used interactively to the usage message. - - - -Functions in /etc/init.d/functions +- You are not prohibited from adding other commands; list all commands + which you intend to be used interactively to the usage message. +- Notice the change in that stop() and start() are now shell functions. + This means that restart can be implemented as + stop + start + instead of + $0 stop + $0 start + This saves a few shell invocations. + +Functions in /etc/rc.d/init.d/functions ======================================= -daemon [+/-nicelevel] program [arguments] [&] +daemon [ --check <name> ] [ --user <username>] + [+/-nicelevel] program [arguments] [&] Starts a daemon, if it is not already running. Does other useful things like keeping the daemon from dumping core if it terminates unexpectedly. + + --check <name>: + Check that <name> is running, as opposed to simply the + first argument passed to daemon(). + --user <username>: + Run command as user <username> killproc program [signal] @@ -92,9 +124,8 @@ killproc program [signal] pidofproc program Tries to find the pid of a program; checking likely pidfiles, - using the pidof program, or even using ps. Used mainly from - within other functions in this file, but also available to - scripts. + and using the pidof program. Used mainly from within other + functions in this file, but also available to scripts. status program @@ -116,7 +147,7 @@ Tags Unless there is a VERY GOOD, EXPLICIT reason to the contrary, the <endpriority> should be equal to 100 - <startpriority> - + # description: <multi-line description of service> Required. Several lines of description, continued with '\' @@ -164,8 +195,8 @@ Tags If it exists, then a proper reload-if-necessary cycle may be acheived by running these commands: - command=$(/etc/rd.d/init.d/SCRIPT probe) - [ -n "$command" ] && /etc/init.d/SCRIPT $command + command=$(/etc/rc.d/init.d/SCRIPT probe) + [ -n "$command" ] && /etc/rc.d/init.d/SCRIPT $command where SCRIPT is the name of the service's sysv init script. @@ -178,4 +209,4 @@ Tags needs to be done to bring the service into sync with its configuration files. -Copyright (c) 1998 Red Hat Software, Inc. +Copyright (c) 2000 Red Hat Software, Inc. |