Jea, thats it! Thats exactly what i had in mind! Thank you very much! This List and it´s members are excellent!
Greets Johannes -----Ursprüngliche Nachricht----- Von: Robin Cragg [mailto:[EMAIL PROTECTED]] Gesendet: Montag, 30. September 2002 15:10 An: Theuerkorn Johannes Betreff: Re: AW: how to know weather perl script is already running? Hi, firstly, the problem with your script is most likely that your path is wrong (don't forget the `` or system open a shell and then run the command. That means you should try to specify all the patsh in your command line. Secondly, I would not use grep if I were you. ps -wfaux | grep myproc will produce two lines. The first is myprog, the second is \_ grep myprog. :-) Linux is cute like that. It's much simpler to do it all in PERL. I would do the PS too, but I've not seen a module for it yet. This code works. open PS, "/bin/ps -wwfaux |"; @PS = <PS>; close PS; my $flag = 0; foreach (@PS) { $flag++ if (/$0/); } die "$0: Process already running!\n" if ($flag > 1); while (1) { sleep 10; } It's also neater to use $0 so you can change your script name. R At 14:35 30/09/2002 +0200, you wrote: >Hi Robin, that was the way i wanted to do it, but i got problems with it. I >tried to use: > >#!/bin/sh >if ! [`ps ax|grep "perl /home/user1/DiREx/generate_database/"`] >then `scripttorun` >fi > >but it returns the following error: > >./call_script: [23038: command not found > >It seems to use the returned process id as command... > >So how to write such a script? > >Greets Johannes > >-----Ursprüngliche Nachricht----- >Von: Robin Cragg [mailto:[EMAIL PROTECTED]] >Gesendet: Montag, 30. September 2002 14:25 >An: Theuerkorn Johannes; '[EMAIL PROTECTED]' >Betreff: Re: how to know weather perl script is already running? > > >There are two easy ways... > > >If your file creates a lock file when it starts and removes it when it >finishes, a chec to see if the file exists will tell you if the script is >already running./ > >On linux / unix systems do a ps and looks for any occurrances of your >script name. If there are more than one, then die.... > > >R > > >At 11:18 30/09/2002 +0200, Theuerkorn Johannes wrote: > >Hello List, > > > >i have a perl script that i have running from a cron Job. It usually opens > >every 4 hours. But sometimes it takes the script longer to execute its job > >so after cron opens up the perl script as usual, i have two perl jobs >running. > >Is there any possibility to check weather the script is already running? > >Maybe i can use a system command in the crontab? > > > >any help welcoe > > > >greets Johannes > > > >-- > >To unsubscribe, e-mail: [EMAIL PROTECTED] > >For additional commands, e-mail: [EMAIL PROTECTED] -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]