Question

I’m having some problems with getting the .getruntime.exec() to work properly. Here is the code dealing with that part:

while (line != null)
{
  String name = line;
  String commandFull = commandFirst + name + commandLast;

  String[] fullCommand = new String[] {commandFirst, name, commandLast};
  for(int i=0;i<3;i++)
  {
    System.out.print(fullCommand[i]);
  }
  Runtime runner = Runtime.getRuntime();
  Process p = runner.exec(fullCommand);

  outFile.println(fullCommand);

  line = inFile.readLine();
}

It prints out the command as it should look. When I run the program here is the output:

adfind -b dc=stuff,dc=com -f "cn=user" |find "displayName" >> fullList.txt
Exception in thread "main" java.lang.IllegalArgumentException
        at java.lang.ProcessImpl.<init>(Unknown Source)
        at java.lang.ProcessImpl.start(Unknown Source)
        at java.lang.ProcessBuilder.start(Unknown Source)
        at java.lang.Runtime.exec(Unknown Source)
        at java.lang.Runtime.exec(Unknown Source)
        at lookup.main(lookup.java:41)

Answer 1

You are trying to execute a shell command without the shell.

That is, you are trying to execute something that a shell would interpret (specifically the pipe '|' and append '>>'). To solve this, have Java execute a shell instance and pass the entire command to the shell. How this would work is platform dependent.

For instance in Linux:

String fullCommand = {"/bin/sh", "-c", "find -b dc=stuff,dc=com -f \"cn=user\" |find \"displayName\" >> fullList.txt"};

Or in Windows:

String fullCommand = {"cmd.exe", "/c", "find -b dc=stuff,dc=com -f \"cn=user\" |find \"displayName\" >> fullList.txt"};