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@pantos27
Last active May 17, 2017
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SU and SH in Java/Android
package com.com.com;
import android.util.Log;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStream;
public class CMDProcessor {
private final String TAG = getClass().getSimpleName();
private static final boolean DEBUG = false;
private Boolean can_su;
public SH sh;
public SH su;
public CMDProcessor() {
sh = new SH("sh");
su = new SH("su");
}
public SH suOrSH() {
return canSU() ? su : sh;
}
public boolean canSU() {
return canSU(false);
}
public class CommandResult {
private final String resultTag = TAG + '.' + getClass().getSimpleName();
public final String stdout;
public final String stderr;
public final Integer exit_value;
CommandResult(final Integer exit_value_in) {
this(exit_value_in, null, null);
}
CommandResult(final Integer exit_value_in, final String stdout_in,
final String stderr_in) {
exit_value = exit_value_in;
stdout = stdout_in;
stderr = stderr_in;
if (DEBUG)
Log.d(TAG, resultTag + "( exit_value=" + exit_value
+ ", stdout=" + stdout + ", stderr=" + stderr + " )");
}
public boolean success() {
return exit_value != null && exit_value == 0;
}
}
public class SH {
private String SHELL = "sh";
public SH(final String SHELL_in) {
SHELL = SHELL_in;
}
private String getStreamLines(final InputStream is) {
String out = null;
StringBuffer buffer = null;
final DataInputStream dis = new DataInputStream(is);
try {
if (dis.available() > 0) {
buffer = new StringBuffer(dis.readLine());
while (dis.available() > 0) {
buffer.append("\n").append(dis.readLine());
}
}
dis.close();
} catch (final Exception ex) {
Log.e(TAG, ex.getMessage());
}
if (buffer != null) {
out = buffer.toString();
}
return out;
}
public Process run(final String s) {
Process process = null;
try {
process = Runtime.getRuntime().exec(SHELL);
final DataOutputStream toProcess = new DataOutputStream(
process.getOutputStream());
toProcess.writeBytes("exec " + s + "\n");
toProcess.flush();
} catch (final Exception e) {
Log.e(TAG,
"Exception while trying to run: '" + s + "' "
+ e.getMessage());
process = null;
}
return process;
}
public CommandResult runWaitFor(final String s) {
if (DEBUG)
Log.d(TAG, "runWaitFor( " + s + " )");
final Process process = run(s);
Integer exit_value = null;
String stdout = null;
String stderr = null;
if (process != null) {
try {
exit_value = process.waitFor();
stdout = getStreamLines(process.getInputStream());
stderr = getStreamLines(process.getErrorStream());
} catch (final InterruptedException e) {
Log.e(TAG, "runWaitFor " + e.toString());
} catch (final NullPointerException e) {
Log.e(TAG, "runWaitFor " + e.toString());
}
}
return new CommandResult(exit_value, stdout, stderr);
}
}
public boolean canSU(final boolean force_check) {
if (can_su == null || force_check) {
final CommandResult r = su.runWaitFor("id");
final StringBuilder out = new StringBuilder();
if (r.stdout != null) {
out.append(r.stdout).append(" ; ");
}
if (r.stderr != null) {
out.append(r.stderr);
}
Log.d(TAG, "canSU() su[" + r.exit_value + "]: " + out);
can_su = r.success();
}
return can_su;
}
}
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