Date: Fri, 12 Dec 1997 13:10:59 -0600 (CST) From: Guy Helmer <ghelmer@cs.iastate.edu> To: Valter Mazzaro <teima@kk.etx.ericsson.se> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: java should execute scripts Message-ID: <Pine.HPP.3.96.971212130203.19922H-100000@popeye.cs.iastate.edu> In-Reply-To: <199712121734.SAA06798@kk660.kk.etx.ericsson.se>
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On Fri, 12 Dec 1997, Valter Mazzaro wrote:
> I wonder how it's possible to run unix scripts from java.
> I know that I can run an executable file by running rt.exec command,
> for example rt.exec("dhcpconf le0 release"), but if I create a script,
> let's say stopDHCP that contains just the line:dhcpconf le0 release
> the command rt.exec("stopDHCP") doesn't work.
> Any hint?
>From the Java Programmers FAQ at
http://www.netmeg.net/faq/computers/programming/languages/java/programmers-faq/
Question 10.5: How do I execute a command from Java?
A. Use Runtime.getRuntime.exec( myCommandString ) Where myCommandString is
something like "/full/pathname/command"
I understand that the full pathname may be required (it seems like I've
read that rt.exec() doesn't use the path, but that may be incorrect). At
any rate, if you don't wish to use the full pathname, try using
rt.exec("./stopDHCP") as "." may not be in your PATH.
With your shell script, be sure the first line is "#!/bin/sh" and the file
is executable (as in "chmod +x stopDHCP"). Otherwise you may need to
prefix the command to run your script with "/bin/sh", like
rt.exec("/bin/sh stopDHCP").
Hope this helps,
Guy Helmer
Guy Helmer, Computer Science Graduate Student - ghelmer@cs.iastate.edu
Iowa State University http://www.cs.iastate.edu/~ghelmer
Research Assistant, Scalable Computing Laboratory, Ames Laboratory
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