Re: Run script as often as possible
mysc:2345:respawn:/path/to/myscript What does the 'mysc' do? id:runlevels:action:process "id is a unique sequence of 1-4 characters which identifies an entry in inittab" from `man inittab` -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Run script as often as possible
Dave Carrigan wrote: On Tue, Sep 28, 2004 at 11:23:15AM +0200, Jacob Larsen wrote: I have a script that I'd like to run as often as possible. mysc:2345:respawn:/path/to/myscript What does the 'mysc' do? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Run script as often as possible
On Tue, Sep 28, 2004 at 11:23:15AM +0200, Jacob Larsen wrote: > I have a script that I'd like to run as often as possible. what does that mean? as many instances as possible until the cpu load in maxed out? > The script may only run in 1 instance. And that would be ... > My idea is to have a cron script to start it once every hour. is that: a specific time each hour? a random time spaced one hour apart? > The script > should write a run file, and if the run file exists, exit. > Is this the best way? the issues this probably addresses is concurrency. the way to address this issue depends what you are trying to avoid: two instances of the same program running at the same time overrighting a file? or something else? > > Thanks, > Jacob =Kev -- (__) (oo) /--\/ / ||| * /\---/\ ~~ ~~ "Have you mooed today?"... signature.asc Description: Digital signature
Re: Run script as often as possible
mysc:2345:respawn:su - someuser -c /path/to/myscript Thanks! And I guess if I want to write output to a file I do this: mysc:2345:respawn:su - someuser -c /path/to/myscript >> /var/log/myscript.log -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Run script as often as possible
On Tue, Sep 28, 2004 at 04:49:49PM +, Adam Funk wrote: > That runs the script as root, right? If you wanted to run it with as > another user, would you just stick a bit of sudo in that inittab > entry? Sure: mysc:2345:respawn:su - someuser -c /path/to/myscript -- Dave Carrigan Seattle, WA, USA [EMAIL PROTECTED] | http://www.rudedog.org/ | ICQ:161669680 UNIX-Apache-Perl-Linux-Firewalls-LDAP-C-C++-DNS-PalmOS-PostgreSQL-MySQL Dave is currently listening to Hunters & Collectors - Everything's On Fire (Human Frailty) signature.asc Description: Digital signature
Re: Run script as often as possible
On Tuesday 28 September 2004 16:30, Dave Carrigan wrote: > On Tue, Sep 28, 2004 at 11:23:15AM +0200, Jacob Larsen wrote: >> I have a script that I'd like to run as often as possible. >> The script may only run in 1 instance. >> My idea is to have a cron script to start it once every hour. The >> script should write a run file, and if the run file exists, exit. >> Is this the best way? > > Run it from init by putting an entry into your inittab. As soon as it > exits, init will respawn it. The upside is that there is no need to do > locking or process synchronization. The following inittab entry would > work. > > mysc:2345:respawn:/path/to/myscript That runs the script as root, right? If you wanted to run it with as another user, would you just stick a bit of sudo in that inittab entry? -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Run script as often as possible
On Tue, Sep 28, 2004 at 11:23:15AM +0200, Jacob Larsen wrote: > I have a script that I'd like to run as often as possible. > The script may only run in 1 instance. > My idea is to have a cron script to start it once every hour. The script > should write a run file, and if the run file exists, exit. > Is this the best way? Run it from init by putting an entry into your inittab. As soon as it exits, init will respawn it. The upside is that there is no need to do locking or process synchronization. The following inittab entry would work. mysc:2345:respawn:/path/to/myscript -- Dave Carrigan Seattle, WA, USA [EMAIL PROTECTED] | http://www.rudedog.org/ | ICQ:161669680 UNIX-Apache-Perl-Linux-Firewalls-LDAP-C-C++-DNS-PalmOS-PostgreSQL-MySQL Dave is currently listening to Creedence Clearwater Revival - Travellin' Band (Chronicle) signature.asc Description: Digital signature
Re: Run script as often as possible
I have a script that I'd like to run as often as possible. The script may only run in 1 instance. My idea is to have a cron script to start it once every hour. The script should write a run file, and if the run file exists, exit. Is this the best way? yeah. Accpeted method is to write a lock file to /var/lock and exit if it exists If the server boots, will /var/lock be emptied, or should I manually clean that area? Thanks, Jacob -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
Re: Run script as often as possible
On Tue, 2004-09-28 at 19:23, Jacob Larsen wrote: > I have a script that I'd like to run as often as possible. > The script may only run in 1 instance. > My idea is to have a cron script to start it once every hour. The script > should write a run file, and if the run file exists, exit. > Is this the best way? yeah. Accpeted method is to write a lock file to /var/lock and exit if it exists Cheers Blake Swadling Senior Software Engineer Newton Pty Ltd Telephone: +61 2 6247 3544 Fax: +61 2 6247 3533 Mobile: +61 407 026277 Web: http://www.newton.com.au signature.asc Description: This is a digitally signed message part
