Running find command in Solaris using Runtime.exec

[viclap]

I'm very new in java and trying to figure out why i'm getting a standard error output of "/usr/bin/find: incomplete statement" --->"find /export/home -type f -mtime +30 -exec rm {} \;" } using java program but executing manually the "find" script command using CLI on solaris Unix os it works fine.

Here is the code:

import java.io.*;
public class PurgeLog
{
//script to remove files older than 30 days
public static String CmdList = { "find /export/home -type f -mtime +30 -exec rm {} \;" };

public static void main (String[] args)

{
System.out.println("You are about to purge files older than 30 days ....... [Y/N]: ");
String s = null;
String name = null;
try {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
name = br.readLine();
if (name.equalsIgnoreCase("Y"))
{
System.out.println("Starting to purge Old LogFiles, Pls Wait........\n");
System.out.print("");
System.out.println("Executing--->"+CmdList);
Process p = Runtime.getRuntime().exec(CmdList);
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));
// read the output from the command
System.out.println("Standard output of the command:\n");
while ((s = stdInput.readLine()) != null)
{
System.out.println(s);
}
//System.out.println("Exit Value " + exitval);
// read any errors from the attempted command
System.out.println("Standard error of the command (if any):\n");
while ((s = stdError.readLine()) != null) {
System.out.println(s);
//int exitval = p.waitfor();
}
int exitIn = p.waitFor();
int exitOut = p.waitFor();
}
else
{
System.out.println("Not continuing......Thanks");
System.exit(-1);
}
} //try
catch (IOException e)
{
System.out.println("Error!--->"+e.getMessage());
System.exit(-1);
}
catch (Throwable t) { t.printStackTrace();}
}
}

Any help would be gladly appreciated.Thanks in advance.

 

[stefanwagner]

String CmdList = { "find /export/home -type f -mtime +30 -exec rm {} \;" };

You call it a list, but it isn't magically converted to a list, not is it a list in itself.

On the shell, a command and its parameters are divided by whitspace, so that would be a list, consisting of "find", "/ecport/home", "-type", "f" and so on.

You know, that to avoid the splitting, you mask the the blanks on the commandline, so

find "/export/home -type"

would mean that find shall search for a starting directory "/expoert/home -type".

Similarly you advice Runtime to execute a command called "find /export...".
Instead, you have to split it in a String array

String [] cmdList = {"find", "/export/home", "-type", ... };

Then, java does not inherit a path from the invoking shell or environment, so you have to give the full name /usr/bin/find, not just find, and "-exec" "/bin/rm" - but instead of -exec rm you would like to call -delete (maybe not available for sun/find, just Linux:Gnu/find?).

For further information read:

http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html?

don't visit my homepage:

http://home.arcor.de/hirnstrom/minis/index.html

 

[viclap]

Thank you very much. This such a big help for me.