This is Finger.java, my first useful Java program.
// command-line finger program in Java. Try fingering [EMAIL PROTECTED]
import java.net.*;
public class Finger {
private static final String USAGE_MSG =
"Usage: Finger user@host or Finger user host";
public static void finger(String username, String host) throws Exception {
InetAddress inaddr = InetAddress.getByName(host);
java.io.InputStream is;
java.io.OutputStream os;
byte[] readbuf = new byte[4096];
int readlen;
Socket mysocket = new Socket(inaddr, 79);
is = mysocket.getInputStream();
os = mysocket.getOutputStream();
// I wonder where these encoding names are listed? They're not listed
// in the JDK 1.2.2 API documentation under java.lang.String, which
// is where I'd expect them to be. I got a list of the ones supported
// by my libgcj as follows:
// objdump -T /usr/lib/libgcj.so.0 | egrep gnu.*gcj.*convert.*Output
// because GCJ complained there was no class
// gnu.gcj.convert.Output_ASCII when I tried that.
// This told me that my libgcj supports "SJIS", "8859_1", "EUCJIS",
// "UTF8", and "JavaSrc", and it happens that Kaffe also supports
// "8859_1".
os.write(username.getBytes("8859_1"));
os.write("\r\n".getBytes("8859_1"));
while ((readlen = is.read(readbuf)) > 0) {
System.out.write(readbuf, 0, readlen);
}
System.out.flush();
mysocket.close();
}
public static void finger(String userathost) throws Exception {
int atloc = userathost.indexOf('@');
if (atloc == -1) {
System.out.println(USAGE_MSG);
} else {
finger(userathost.substring(0, atloc),
userathost.substring(atloc+1));
}
}
public static void main(String[] arguments) throws Exception {
if (arguments.length == 1) {
finger(arguments[0]);
} else if (arguments.length == 2) {
finger(arguments[0], arguments[1]);
} else {
System.out.println(USAGE_MSG);
}
}
}
--
<[EMAIL PROTECTED]> Kragen Sitaker <http://www.pobox.com/~kragen/>
We have always been quite clear that Win95 and Win98 are not the systems to
use if you are in a hostile security environment. -- Paul Leach
The Internet is hostile. -- Paul Leach <[EMAIL PROTECTED]>
