Groups > comp.lang.java.programmer > #23155

Why does this only work when I am running a shellscript

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From	Cecil Westerhof <Cecil@decebal.nl>
Newsgroups	comp.lang.java.programmer
Subject	Why does this only work when I am running a shellscript
Organization	Decebal Computing
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Date	Sat, 30 Mar 2013 09:46:38 +0100
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I have the following code:
    private static void doCommand(final String cmd) throws IOException {
        Process p;
        Scanner sc;

        System.out.println("#" + cmd + "#");
        p  = Runtime.getRuntime().exec(cmd);
        sc = new Scanner(p.getInputStream());
        while (sc.hasNext()) {
            System.out.println(sc.nextLine());
        }
    }

When I call s shellscript like:
    doCommand("createQuote.sh citation");

It works as I would expect. When I use something like:
    /usr/bin/convert …

It hangs. It is not the command, because if I execute the command I
print in the shell directly, there is no problem.

So what is happening here?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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Why does this only work when I am running a shellscript Cecil Westerhof <Cecil@decebal.nl> - 2013-03-30 09:46 +0100
  Re: Why does this only work when I am running a shellscript Barb Knox <see@sig.below> - 2013-03-31 03:54 +1300
    Re: Why does this only work when I am running a shellscript Steven Simpson <ss@domain.invalid> - 2013-03-30 16:07 +0000
  Re: Why does this only work when I am running a shellscript markspace <markspace@nospam.nospam> - 2013-03-30 08:23 -0700
    Re: Why does this only work when I am running a shellscript Arne Vajhøj <arne@vajhoej.dk> - 2013-03-30 11:34 -0400
  Re: Why does this only work when I am running a shellscript Roedy Green <see_website@mindprod.com.invalid> - 2013-03-30 08:35 -0700
  Re: Why does this only work when I am running a shellscript RVic <rvince99@hotmail.com> - 2013-03-30 08:41 -0700
    Re: Why does this only work when I am running a shellscript Joerg Meier <joergmmeier@arcor.de> - 2013-03-31 01:00 +0100
    Re: Why does this only work when I am running a shellscript Roedy Green <see_website@mindprod.com.invalid> - 2013-03-31 17:04 -0700
  Re: Why does this only work when I am running a shellscript Steven Simpson <ss@domain.invalid> - 2013-03-30 16:13 +0000

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