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Re: (java.lang.Runtime()).exec(new String[]) ...

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From	Nigel Wade <nmw-news@ion.le.ac.uk>
Newsgroups	comp.lang.java.programmer
Subject	Re: (java.lang.Runtime()).exec(new String[]) ...
Date	Mon, 12 Dec 2011 14:31:10 +0000
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On 10/12/11 06:01, lbrt chx _ gemale wrote:
>   Something like this:
> ~
>   Process proc = (java.lang.Runtime()).exec((new String[]{"ls", "-l", "/media/sda1/Physical_Basis.flv"}));
> ~
>   works just fine.
> ~
>   Why doesn't something like,  say:
> ~
>   Process proc = (java.lang.Runtime()).exec((new String[]{"date;", "time","ls", "-l", "/media/sda1/Physical_Basis.flv;", "date;"}));
> ~
>   work?
> ~

Besides the other problems, even if the code were executable it would 
fail because you are attempting to run a sequence of commands.

Process.exec() runs one command, the first argument. The rest of the 
string elements are arguments to that command. It will not run a 
sequence of commands as implied by the ";" ending each of the first two 
commands. That requires you to use a shell to interpret the command 
sequence.

-- 
Nigel Wade

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(java.lang.Runtime()).exec(new String[]) ...  lbrt chx _ gemale - 2011-12-10 06:01 +0000
  Re: (java.lang.Runtime()).exec(new String[]) ... Lew <lewbloch@gmail.com> - 2011-12-09 23:00 -0800
  Re: (java.lang.Runtime()).exec(new String[]) ... Roedy Green <see_website@mindprod.com.invalid> - 2011-12-10 02:44 -0800
  Re: (java.lang.Runtime()).exec(new String[]) ... Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-12-12 14:31 +0000

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