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Java
Runtime and process picking up unwanted char's
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[QUOTE="iksrazal, post: 655588"] Hi all, I was looking at a problem at comp.os.linux.misc - trying to put 'pgrep' thru 'wc -w' . Allow the code below to explain: package org.client; import java.util.*; import java.io.*; public class Pgrep { public static void main(String[] args) { try { // String[] cmd = new String[]{"sh", "-c", "/usr/bin/pgrep -f konqueror | /usr/bin/wc -w" // String[] cmd = new String[]{"sh", "-c", "/usr/bin/pgrep -f konqueror" String[] cmd = new String[]{"sh", "-c", "/usr/bin/pgrep -f konqueror | od -c" }; System.out.println(cmd[0] + " " + cmd[1] + " " + cmd[2]); Runtime rt = Runtime.getRuntime(); Process proc = rt.exec(cmd); // put a BufferedReader on the ls output InputStream inputstream = proc.getInputStream(); InputStreamReader inputstreamreader = new InputStreamReader(inputstream); BufferedReader bufferedreader = new BufferedReader(inputstreamreader); // read the ls output String line; while ((line = bufferedreader.readLine()) != null) { System.out.println(line); } // check for failure if (proc.waitFor() != 0) { System.err.println("exit value = " + proc.exitValue()); } } catch (Exception ex) { ex.printStackTrace(); } } } /home/iksrazal/ahelp> ps -ef | grep [k]onqueror iksrazal 23848 7744 0 Mar14 ? 00:01:05 konqueror [kdeinit] konqueror --silent iksrazal 29474 7744 0 Mar14 ? 00:00:00 kio_file [kdeinit] kio_file file /tmp/ksocket-iksrazal/klauncherkxpgOb.slave-socket /tmp/ksocket-iksrazal/konquerorRuDO7b.slave-socket /home/iksrazal/ahelp> /usr/bin/pgrep -f konqueror | wc -w 2 Running from the above program - with the command above running 'wc -w' I get 3. Running the version with 'od -c' I get: [echo] running grep [java] sh -c /usr/bin/pgrep -f konqueror | od -c [java] 0000000 2 3 8 4 8 \n 2 9 4 7 4 \n 1 7 8 2 [java] 0000020 7 \n [java] 0000022 With the content after '23848' and '29474' changing with every invokation. Any ideas? Robert [URL]http://www.braziloutsource.com/[/URL] [/QUOTE]
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