Red Hat 9.0 - Starting a program when the system starts
April 15, 2004 08:17 AM
Hey all,
I have a couple of program i wrote - an SMTP server and a proxy. Usually, i start my server, log in as root, and do nohup ./smtp&, but i thought there must be an easier way to do this.
I don''t need to run the program as a daemon or anything, i just want it to start when the system starts so i don''t need to log in and bugger about.
Anyone know how i do this?
Cheers,
Steve
1,099
April 15, 2004 09:42 AM
init scripts.
Red HAt, iirc, uses sysv init scripts right? (somebody?)
so that means basically, you''d be ploping a script called something like mysmtpserver.rc into somehting like /etc/rc.d/init
the script would have to respond to start, stop and restart commands.
Then you symlink from /etc/rc.d/rc.3 (or whatever run levels you want your program to run at) to that file. There''s generally some naming convention, like S50.mysmtpserver to specify what order the script are run in.
I suggest you take a look at the apache one to see how to write it. apache, iirc, has a very simple one, since it jsut passes the command off to apachectl
I''m typing this off memory. Lots of errors, to be sure. since i''ve never used red hat.
Red HAt, iirc, uses sysv init scripts right? (somebody?)
so that means basically, you''d be ploping a script called something like mysmtpserver.rc into somehting like /etc/rc.d/init
the script would have to respond to start, stop and restart commands.
Then you symlink from /etc/rc.d/rc.3 (or whatever run levels you want your program to run at) to that file. There''s generally some naming convention, like S50.mysmtpserver to specify what order the script are run in.
I suggest you take a look at the apache one to see how to write it. apache, iirc, has a very simple one, since it jsut passes the command off to apachectl
I''m typing this off memory. Lots of errors, to be sure. since i''ve never used red hat.
April 15, 2004 09:49 AM
The kernel calls inittab when it is is finished loading. Inittab has references to /etc/rc.d in it for the different runlevels. I would say that is the place to start for system level request like this, as opposed to saying something like /etc/profile.d. While they may be named different from distro to distro, the behaviour is the same.
Start peeking in /etc/rc.d/rc.{_HINT_}
Again, I''ve seen these vary from distro to distro
i.e:
/etc/rc.d/rc.M might be for module loading regardless of runlevel
/etc/rc.d/rc.local -- same as above or below
/etc/rc.d/rc.boot might be for boot time scripts, again regardless of runlevel, for user land OS configuration
/etc/rc.d/rc.httpd would be for starting your http daemon
etc, etc, etc
Start peeking in /etc/rc.d/rc.{_HINT_}
Again, I''ve seen these vary from distro to distro
i.e:
/etc/rc.d/rc.M might be for module loading regardless of runlevel
/etc/rc.d/rc.local -- same as above or below
/etc/rc.d/rc.boot might be for boot time scripts, again regardless of runlevel, for user land OS configuration
/etc/rc.d/rc.httpd would be for starting your http daemon
etc, etc, etc
1,099
April 15, 2004 09:54 AM
quote: Original post by Anonymous Poster
/etc/rc.d/rc.M might be for module loading regardless of runlevel
/etc/rc.d/rc.local -- same as above or below
/etc/rc.d/rc.boot might be for boot time scripts, again regardless of runlevel, for user land OS configuration
/etc/rc.d/rc.httpd would be for starting your http daemon
etc, etc, etc
I think you use slackware too much. Why anyone uses slackware, I just don''t know, anymore...
277
April 15, 2004 09:57 AM
evil steve,
to do this you need to make a shell script and place it into the (rc.3?) directory. there are tons of articles on the web about it if you need help.
-brad
to do this you need to make a shell script and place it into the (rc.3?) directory. there are tons of articles on the web about it if you need help.
-brad
-brad
April 15, 2004 10:10 AM
Yeah, i had a look around /etc/rc.d/ but i wasn''t sure if there was an easier way (like how you can add a line to autoexec.bat in windows)
So, can i just copy the apache init script and modify it then?
Heres what my apache script looks like (/etc/rc.d/rc3.d/K15httpd):
If i modify that, do i need to do stuff for start and stop? My SMTP server just enters a loop and responds to SIGTERM and SIGKILL signals to exit
Thanks for all the replies,
Steve
So, can i just copy the apache init script and modify it then?
Heres what my apache script looks like (/etc/rc.d/rc3.d/K15httpd):
#!/bin/bash## Startup script for the Apache Web Server## chkconfig: - 85 15# description: Apache is a World Wide Web server. It is used to serve \# HTML files and CGI.# processname: httpd# pidfile: /var/run/httpd.pid# config: /etc/httpd/conf/httpd.conf# Source function library.. /etc/rc.d/init.d/functionsif [ -f /etc/sysconfig/httpd ]; then . /etc/sysconfig/httpdfi# This will prevent initlog from swallowing up a pass-phrase prompt if# mod_ssl needs a pass-phrase from the user.INITLOG_ARGS=""# Set HTTPD=/usr/sbin/httpd.worker in /etc/sysconfig/httpd to use a server# with the thread-based "worker" MPM; BE WARNED that some modules may not# work correctly with a thread-based MPM; notably PHP will refuse to start.# Path to the apachectl script, server binary, and short-form for messages.apachectl=/usr/sbin/apachectlhttpd=${HTTPD-/usr/sbin/httpd}prog=httpdRETVAL=0# check for 1.3 configurationcheck13 () { CONFFILE=/etc/httpd/conf/httpd.conf GONE="(ServerType|BindAddress|Port|AddModule|ClearModuleList|" GONE="${GONE}AgentLog|RefererLog|RefererIgnore|FancyIndexing|" GONE="${GONE}AccessConfig|ResourceConfig)" if grep -Eiq "^[[:space:]]*($GONE)" $CONFFILE; then echo echo 1>&2 " Apache 1.3 configuration directives found" echo 1>&2 " please read /usr/share/doc/httpd-2.0.40/migration.html" failure "Apache 1.3 config directives test" echo exit 1 fi}# The semantics of these two functions differ from the way apachectl does# things -- attempting to start while running is a failure, and shutdown# when not running is also a failure. So we just do it the way init scripts# are expected to behave here.start() { echo -n $"Starting $prog: " check13 || exit 1 daemon $httpd $OPTIONS RETVAL=$? echo [ $RETVAL = 0 ] && touch /var/lock/subsys/httpd return $RETVAL}stop() { echo -n $"Stopping $prog: " killproc $httpd RETVAL=$? echo [ $RETVAL = 0 ] && rm -f /var/lock/subsys/httpd /var/run/httpd.pid}reload() { echo -n $"Reloading $prog: " check13 || exit 1 killproc $httpd -HUP RETVAL=$? echo}# See how we were called.case "$1" in start) start ;; stop) stop ;; status) status $httpd RETVAL=$? ;; restart) stop start ;; condrestart) if [ -f /var/run/httpd.pid ] ; then stop start fi ;; reload) reload ;; graceful|help|configtest|fullstatus) $apachectl $@ RETVAL=$? ;; *) echo $"Usage: $prog {start|stop|restart|condrestart|reload|status|fullstatus|graceful|help|configtest}" exit 1esacexit $RETVALIf i modify that, do i need to do stuff for start and stop? My SMTP server just enters a loop and responds to SIGTERM and SIGKILL signals to exit
Thanks for all the replies,
Steve
April 15, 2004 10:11 AM
quote: Original post by C-Junkie
I think you use slackware too much. Why anyone uses slackware, I just don''t know, anymore...
Just since Slackware 2.3
I''m not being judged am I? 
But to keep this somewhat related, I think* we introduced SystemV init compatability around 7.0 to be like the other distro''s. So we can the option do the things the slacker way, or the RH, SuSE, Mandrake, {your flavor here}
(*I can''t recall absolutely, it''s been awhile)
124
April 15, 2004 10:21 AM
Look for a local.start file. In Gentoo it''s /etc/conf.d/local.start, but Red Hat will probably have it in a different place. That should be executed by the local rc-script on startup, so you could start your program there.
277
April 15, 2004 10:30 AM
Evil Steve,
"... Scriptfile... too, big...." You should do a google search for a proxy startup script or something like that. That way you don''t have all that extra junk in there to ween out. (but to stay on topic, yes, just modify it to use your stuff. Also make sure there is a "start" "stop" in the script. the redhat script thingy only runs scripts with those).
-brad
"... Scriptfile... too, big...." You should do a google search for a proxy startup script or something like that. That way you don''t have all that extra junk in there to ween out. (but to stay on topic, yes, just modify it to use your stuff. Also make sure there is a "start" "stop" in the script. the redhat script thingy only runs scripts with those).
-brad
-brad
122
April 15, 2004 10:35 AM
you have to create a script, place it into /etc/rc.d/init.d
then do /sbin/chkconfig --add /etc/rc.d/init.d/scriptname
it will be added into your rc.x folders (rc.5 is the normal startup)
another way is to put your smtp into /etc/rc.d/rc.local
just place your command in there
then do /sbin/chkconfig --add /etc/rc.d/init.d/scriptname
it will be added into your rc.x folders (rc.5 is the normal startup)
another way is to put your smtp into /etc/rc.d/rc.local
just place your command in there
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