46 lines
1.5 KiB
Java
46 lines
1.5 KiB
Java
package com.termux.x11.starter;
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import android.os.ParcelFileDescriptor;
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import java.io.ByteArrayOutputStream;
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import java.io.DataOutputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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public class ExecHelper {
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public static void exec(String executable, String[] args) throws IOException {
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final ByteArrayOutputStream baos = new ByteArrayOutputStream();
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final DataOutputStream ous = new DataOutputStream(baos);
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ous.writeBytes(executable);
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ous.writeByte(0);
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if (args != null)
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for (String s: args) {
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ous.write(s.getBytes());
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ous.writeByte(0); // as Null character
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}
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ous.flush();
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ous.close();
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final byte[] bArray = baos.toByteArray();
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long pipe = createPipe(bArray.length);
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int pipeFd = pipeWriteFd(pipe);
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ParcelFileDescriptor fd = ParcelFileDescriptor.adoptFd(pipeFd);
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OutputStream stream = new FileOutputStream(fd.getFileDescriptor());
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int len = Math.min(bArray.length, 1024);
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for (int i = 0; i < bArray.length; i+= len) {
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if (i + len > bArray.length)
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len = bArray.length - i;
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stream.write(bArray, i, len);
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flushPipe(pipe);
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}
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performExec(pipe);
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}
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private static native long createPipe(int capacity);
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private static native int pipeWriteFd(long p);
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private static native void flushPipe(long p);
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private static native void performExec(long p);
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}
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