processbuilder

When I execute a command using ProcessBuilder , how does it know where to look for that command? Using this hack/trick I've modified my PATH variable (verified by inspecting processBuilder.environment() ) to be bad (empty, working dir, etc) but ProcessBuilder can still execute sort, echo, bash, etc. just fine. How is it doing this?! Note: My particular development environment is OSX but this code will also run on Red Hat Enterprise Linux. The documentation says [...] a command, a list of strings which signifies the external program file to be invoked and its arguments, if any. Which string

I am trying to redirect output of a process started with the help of ProcessBuilder using following code ProcessBuilder pb = new ProcessBuilder("/myScript >> /myLogFile 2>&1 <& - &"); Map<String, String> env = pb.environment(); env.clear(); env.put("var1", "val1"); env.put("var2", "val2"); pb.redirectErrorStream(true); Process p = pb.start(); But it failed with exception Exception in thread "main" java.io.IOException: Cannot run program "/myScript >> /myLogFile 2>&1 <& - &": java.io.IOException: error=2, No such file or directory at java.lang.ProcessBuilder.start(ProcessBuilder.java:460) It

I would like to pass multiple parameters to a processBuilder and the parameters to be separated by a space. Here is the command, String[] command_ary = {dir+"library/crc"," -s ", fileName," ",addressRanges}; I need to provide a space after "fcrc" and after "-p" and in between "filename" and the "addressRange". Thank you You don't need to include spaces. The ProcessBuilder will deal with that for you. Just pass in your arguments one by one, without space: ProcessBuilder pb = new ProcessBuilder( dir + "library/crc", "-s", fileName, addressRanges); We need spaces between arguments in commandline

I am trying to open a shell (xterm) and interact with it (write commands and read the shell's output) Here is a sample of code which won't work: public static void main(String[] args) throws IOException { Process pr = new ProcessBuilder("xterm").start(); PrintWriter pw = new PrintWriter(pr.getOutputStream()); pw.println("ls"); pw.flush(); InputStreamReader in = new InputStreamReader(pr.getInputStream()); System.out.println(in.read()); } When I execute this program an "xterm" window opens and the "ls" command is not entered. Only when I close the window I get a "-1" printed and nothing is read

I need to build the following command using ProcessBuilder: "C:\Program Files\USBDeview\USBDeview.exe" /enable "My USB Device" I tried with the following code: ArrayList<String> test = new ArrayList<String>(); test.add("\"C:\\Program Files\\USBDeview\\USBDeview.exe\""); test.add("/enable \"My USB Device\""); ProcessBuilder processBuilder = new ProcessBuilder(test); processBuilder.start().waitFor(); However, this passes the following to the system (verified using Sysinternals Process Monitor) "C:\Program Files\USBDeview\USBDeview.exe" "/enable "My USB Device"" Note the quote before /enable and