Executing Linux Commands in java

Question

I need to copy files of specific pattern from one director to another

File Pattern: "nm.cdr.*(asterisk)-2014-08-16-14*(asterisk).gz"

Command: "cp " + inputPath + filesPattern + " " + destPath;

If i use specific file instead of using * than it works fine(for single file) but with pattern using * it doesn't work.

Edit 1: I tried following code:

public void runtimeExec(String cmd)
{
    StringBuffer output = new StringBuffer();

        Process p;
        try
        {
            p = Runtime.getRuntime().exec(cmd);
            p.waitFor();
            BufferedReader reader = 
                new BufferedReader(new InputStreamReader(p.getInputStream()));

            String line = "";           
            while ((line = reader.readLine())!= null) {
                    output.append(line + "\n");
            }

        } 
        catch (IOException | InterruptedException e) 
        {
            LogProperties.log.error(e);
        }
}

What have you tried so far? Please read How do I ask a good question?. Post your code, see How to create a Minimal, Complete, and Verifiable example. — DavidPostill
– DavidPostill, Commented Aug 16, 2014 at 10:57

morgano · Accepted Answer · 2014-08-16 11:57:26Z

3

The asterisk is something interpreted by the shell, so you need to use the shell as the main process, the command line for the process in Java would be something like bash -c '/origin/path/nm.cdr.*-2014-08-16-14*.gz /destination/path'.

Now, if you try to use this command in a single string it won't work, you need to use a String[] instead of a String. So you need to do the following:

1: change your method's signature to use a String[]:

public void runtimeExec(String[] cmd)

2: call your method with this value for cmd:

String[] cmd = new String[] {"bash", "-c",
    "cp " + imputPath + filesPattern + " " + destPath};

answered Aug 16, 2014 at 11:57

morgano

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michael875 · Accepted Answer · 2014-08-16 11:26:02Z

2

Can't see what exactly is passed as a command, but on linux often is necessary to split command and parameters to string array, like:

String[] cmd = {"cp", inputPath+filesPattern, destPath};

answered Aug 16, 2014 at 11:26

michael875

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1 Comment

viki Over a year ago

cmd = cp /var/logs/nm.cdr.*-2014-08-16-14*.gz /var/logs2

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