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simplesshd/app/src/main/java/org/galexander/sshd/api.java

105 lines
2.5 KiB

package org.galexander.sshd;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
public class api {
private static AtomicReference<Thread> curr_thread = null;
/* assumes JNI api_mkfifo() has already completed */
public static void start(final Context ctx, final String fn) {
if (fn == null) return;
if (curr_thread.get() != null) return;
Thread t = new Thread() { public void run() {
thread_main(ctx, fn); } };
if (curr_thread.compareAndSet(null, t)) {
t.start();
}
}
private static String get_line(FileInputStream fis) throws IOException {
byte[] ret = new byte[512];
int len = 0;
while (true) {
if (len+5 > ret.length) {
ret = Arrays.copyOf(ret, len+512);
}
int c = fis.read();
if ((c == -1) || (c == '\n') || (c == 0)) {
return new String(ret, 0, len);
}
ret[len++] = (byte)c;
}
}
private static String get_command(String fn) {
try {
FileInputStream fis = new FileInputStream(fn);
String ret = get_line(fis);
fis.close();
return ret;
} catch (Exception e) {
return null;
}
}
private static List<String> split_string(String s) {
LinkedList<String> ret = new LinkedList<String>();
int ofs = 0;
final int len = s.length();
while (ofs < len) {
while ((ofs < len) &&
Character.isSpace(s.charAt(ofs))) {
ofs++;
}
if (s.startsWith("-- ", ofs)) {
ret.add(s.substring(ofs+3));
break;
} else if (ofs < len) {
int start = ofs;
while ((ofs < len) &&
!Character.isSpace(s.charAt(ofs))) {
ofs++;
}
ret.add(s.substring(start, ofs-start));
}
}
return ret;
}
private static void parse_command(Context ctx, String s) {
List<String> parms = split_string(s);
Iterator<String> pi = parms.iterator();
String cmd = pi.next();
if (cmd.equals("activity")) {
String url = pi.next();
Uri uri = (new Uri.Builder()).path(url).build();
ctx.startActivity(new Intent(Intent.ACTION_VIEW, uri));
}
}
private static void thread_main(Context ctx, String fn) {
int nulls = 0;
while (nulls < 5) { /* retry limit */
String s = get_command(fn);
if (s == null) {
nulls++;
} else {
nulls = 0;
parse_command(ctx, s);
}
}
curr_thread.compareAndSet(Thread.currentThread(), null);
}
}