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Witam

My class:

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;


public class test {

public static void main( String [] args ) {
try{
Runtime runtime = Runtime . getRuntime();

String cmd ="/bin/cp /home/k/java/* /var/www/k/";
System.out.println(cmd);
Process process = runtime.exec(cmd);
InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader bfr = new BufferedReader(isr);
String line;

while ( ( line = bfr . readLine() ) != null ) {
System.out.println(line);
}
}catch(Exception e){
}

}
}

If I use "*" to copy all files, then command doesn't work why? If I try
copy single file then everything is ok.
String cmd ="/bin/cp /home/k/java/single.txt /var/www/k/";

How to copy all files ? :/a

On Thu, 09 Aug 2007 14:46:22 +0200, k4 wrote:
> If I use "*" to copy all files, then command doesn't work why? If I
> try copy single file then everything is ok. String cmd ="/bin/cp
> /home/k/java/single.txt /var/www/k/";
>
> How to copy all files ? :/a

"*" is a special character only to a command shell. The shell itself
expands "*" before passing the resulting file list to the cp.

Runtime.exec() does not use a shell to run the command, so cp sees a
literal "*" instead of the file list.

If you want to use shell features, run a shell:

String[] cmd = {
"/bin/sh",
"-c",
"/bin/cp /home/k/java/* /var/www/k/"
};

/gordon

--

k4 wrote:
> String cmd ="/bin/cp /home/k/java/* /var/www/k/";
Seems overkill to use Runtime.exec() just to copy files. Why not just
use a Reader and a Writer?


--
Joe Attardi

k4 wrote:

> Witam
>
> My class:
>
> import java.io.BufferedReader;
> import java.io.InputStream;
> import java.io.InputStreamReader;
>
>
> public class test {
>
> public static void main( String [] args ) {
> try{
> Runtime runtime = Runtime . getRuntime();
>
> String cmd ="/bin/cp /home/k/java/* /var/www/k/";
> System.out.println(cmd);
> Process process = runtime.exec(cmd);
> InputStream is = process.getInputStream();
> InputStreamReader isr = new InputStreamReader(is);
> BufferedReader bfr = new BufferedReader(isr);
> String line;
>
> while ( ( line = bfr . readLine() ) != null ) {
> System.out.println(line);
> }
> }catch(Exception e){
> }
>
> }
> }
>
> If I use "*" to copy all files, then command doesn't work why? If I try
> copy single file then everything is ok.
> String cmd ="/bin/cp /home/k/java/single.txt /var/www/k/";

Because "*" is only special to the shell, and you are not invoking a shell. In
your case the executable /bin/cp would try to copy a file called "*", and there
isn't one.

>
> How to copy all files ? :/a

Invoke a shell:

String[] cmd ={"/bin/sh", "-c", "/bin/cp /home/k/java/* /var/www/k/"};

--
Nigel Wade, System Administrator, Space Plasma Physics Group,
University of Leicester, Leicester, LE1 7RH, UK
E-mail :
Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555

Joe Attardi wrote:
> k4 wrote:
>> String cmd ="/bin/cp /home/k/java/* /var/www/k/";
> Seems overkill to use Runtime.exec() just to copy files. Why not just
> use a Reader and a Writer?

I would only use Reader & Writer if I knew all the files were
text files.

Byte oriented classes would be more general.

Arne

On Aug 11, 11:48 pm, Arne Vajhøj <a...@vajhoej.dk> wrote:
> I would only use Reader & Writer if I knew all the files were
> text files.
>
> Byte oriented classes would be more general.

Whoops, I wasn't even thinking. I meant FileInputStream/
FileOutputStream, not Reader/Writer.
Thanks Arne