On 22/04/13 07:36, Sven K?hler wrote:
Am 22.04.2013 04:49, schrieb Knute Johnson:
On 4/21/2013 1:29 PM, Sven K?hler wrote:
Am 21.04.2013 19:20, schrieb Knute Johnson:
One quoted argument "hello world"
new ProcessBuilder("test.exe", "hello world");
new ProcessBuilder("test.exe", "\"hello world\"");
new ProcessBuilder("test.exe", "\"hello\" \"world\"");
Run that on Windows as well as on something UNIX like - e.g. Linux.
The output should have been:
1) argv[1]=hello world
2) argv[1]=hello world
3) argv[1]=hello
argv[2]=world
And in the fourth example I added,
new ProcessBuilder("test.exe", "\"\\\"hello world\\\"\"");
the output should have been
4) argv[1]="hello world"
I tested by cross-compiling a C program 'showargs' from Linux (with
mingw32):
#include <stdio.h>
int main(int argc, char **argv)
{
int i;
printf("Arg count: %d\n", argc);
for (i = 0; i < argc; i++)
printf(" argv[%d]=[%s]\n", i, argv[i]);
return 0;
}
To invoke from Java, I used:
import java.io.*;
import java.util.*;
public class TestProcessBuilder {
public static void main(String[] args) throws Exception {
test("showargs", "hello world");
test("showargs", "\"hello world\"");
test("showargs", "\"hello\" \"world\"");
test("showargs", "\"\\\"hello world\\\"\"");
}
private static void test(String... args)
throws IOException, InterruptedException {
System.out.println("Java: " + Arrays.asList(args));
ProcessBuilder pb = new ProcessBuilder(args);
pb.redirectErrorStream(true);
final Process proc = pb.start();
Thread t = new Thread() {
public void run() {
try (InputStream in = proc.getInputStream()) {
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > -1) {
System.out.write(buf, 0, len);
}
} catch (IOException ex) {
System.err.println("error: " + ex);
}
}
};
t.start();
proc.getOutputStream().close();
int rc = proc.waitFor();
t.join();
}
}
(I compiled this on Linux.)
On a Windows VM, I got this:
E:\>java -cp . TestProcessBuilder
Java: [showargs, hello world]
Arg count: 2
argv[0]=[showargs]
argv[1]=[hello world]
Java: [showargs, "hello world"]
Arg count: 2
argv[0]=[showargs]
argv[1]=[hello world]
Java: [showargs, "hello" "world"]
Arg count: 3
argv[0]=[showargs]
argv[1]=[hello]
argv[2]=[world]
Java: [showargs, "\"hello world\""]
Arg count: 2
argv[0]=[showargs]
argv[1]=["hello world"]
E:\>
'java -version' reports:
java version "1.7.0_21"
Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode)
On Linux, I got this:
$ java -cp . TestProcessBuilder
Java: [showargs, hello world]
Arg count: 2
argv[0]=[showargs]
argv[1]=[hello world]
Java: [showargs, "hello world"]
Arg count: 2
argv[0]=[showargs]
argv[1]=["hello world"]
Java: [showargs, "hello" "world"]
Arg count: 2
argv[0]=[showargs]
argv[1]=["hello" "world"]
Java: [showargs, "\"hello world\""]
Arg count: 2
argv[0]=[showargs]
argv[1]=["\"hello world\""]
$
'java -version' report:
java version "1.7.0_15"
OpenJDK Runtime Environment (IcedTea7 2.3.7) (7u15-2.3.7-0ubuntu1~12.04.1)
OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode)
world"]. It seems to be that way for Linux, but not on windows.