mirror of
https://github.com/fankes/termux-app.git
synced 2025-10-25 13:19:21 +08:00
Add ShellUtils to define shell related utils since they don't belong in BackgroundJob
This commit is contained in:
agnostic-apollo
@@ -5,23 +5,18 @@ import android.app.PendingIntent;
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import android.content.Intent;
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import android.os.Bundle;
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import com.termux.BuildConfig;
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import com.termux.app.utils.Logger;
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import com.termux.app.utils.ShellUtils;
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import com.termux.models.ExecutionCommand;
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import com.termux.models.ExecutionCommand.ExecutionState;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.lang.reflect.Field;
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import java.nio.charset.StandardCharsets;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.List;
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/**
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* A background job launched by Termux.
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@@ -37,12 +32,12 @@ public final class BackgroundJob {
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}
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public BackgroundJob(ExecutionCommand executionCommand, final TermuxService service) {
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String[] env = buildEnvironment(false, executionCommand.workingDirectory);
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String[] env = ShellUtils.buildEnvironment(false, executionCommand.workingDirectory);
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if (executionCommand.workingDirectory == null || executionCommand.workingDirectory.isEmpty())
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executionCommand.workingDirectory = TermuxConstants.TERMUX_HOME_DIR_PATH;
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final String[] commandArray = setupProcessArgs(executionCommand.executable, executionCommand.arguments);
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final String[] commandArray = ShellUtils.setupProcessArgs(executionCommand.executable, executionCommand.arguments);
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final String commandDescription = Arrays.toString(commandArray);
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if(!executionCommand.setState(ExecutionState.EXECUTING))
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@@ -59,7 +54,7 @@ public final class BackgroundJob {
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}
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mProcess = process;
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final int pid = getPid(mProcess);
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final int pid = ShellUtils.getPid(mProcess);
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final Bundle result = new Bundle();
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final StringBuilder outResult = new StringBuilder();
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final StringBuilder errResult = new StringBuilder();
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@@ -138,118 +133,4 @@ public final class BackgroundJob {
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}.start();
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}
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private static void addToEnvIfPresent(List<String> environment, String name) {
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String value = System.getenv(name);
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if (value != null) {
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environment.add(name + "=" + value);
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}
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}
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static String[] buildEnvironment(boolean isFailSafe, String workingDirectory) {
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TermuxConstants.TERMUX_HOME_DIR.mkdirs();
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if (workingDirectory == null || workingDirectory.isEmpty()) workingDirectory = TermuxConstants.TERMUX_HOME_DIR_PATH;
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List<String> environment = new ArrayList<>();
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environment.add("TERMUX_VERSION=" + BuildConfig.VERSION_NAME);
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environment.add("TERM=xterm-256color");
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environment.add("COLORTERM=truecolor");
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environment.add("HOME=" + TermuxConstants.TERMUX_HOME_DIR_PATH);
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environment.add("PREFIX=" + TermuxConstants.TERMUX_PREFIX_DIR_PATH);
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environment.add("BOOTCLASSPATH=" + System.getenv("BOOTCLASSPATH"));
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environment.add("ANDROID_ROOT=" + System.getenv("ANDROID_ROOT"));
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environment.add("ANDROID_DATA=" + System.getenv("ANDROID_DATA"));
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// EXTERNAL_STORAGE is needed for /system/bin/am to work on at least
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// Samsung S7 - see https://plus.google.com/110070148244138185604/posts/gp8Lk3aCGp3.
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environment.add("EXTERNAL_STORAGE=" + System.getenv("EXTERNAL_STORAGE"));
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// These variables are needed if running on Android 10 and higher.
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addToEnvIfPresent(environment, "ANDROID_ART_ROOT");
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addToEnvIfPresent(environment, "DEX2OATBOOTCLASSPATH");
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addToEnvIfPresent(environment, "ANDROID_I18N_ROOT");
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addToEnvIfPresent(environment, "ANDROID_RUNTIME_ROOT");
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addToEnvIfPresent(environment, "ANDROID_TZDATA_ROOT");
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if (isFailSafe) {
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// Keep the default path so that system binaries can be used in the failsafe session.
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environment.add("PATH= " + System.getenv("PATH"));
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} else {
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environment.add("LANG=en_US.UTF-8");
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environment.add("PATH=" + TermuxConstants.TERMUX_BIN_PREFIX_DIR_PATH);
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environment.add("PWD=" + workingDirectory);
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environment.add("TMPDIR=" + TermuxConstants.TERMUX_TMP_PREFIX_DIR_PATH);
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}
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return environment.toArray(new String[0]);
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}
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public static int getPid(Process p) {
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try {
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Field f = p.getClass().getDeclaredField("pid");
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f.setAccessible(true);
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try {
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return f.getInt(p);
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} finally {
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f.setAccessible(false);
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}
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} catch (Throwable e) {
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return -1;
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}
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}
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static String[] setupProcessArgs(String fileToExecute, String[] arguments) {
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// The file to execute may either be:
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// - An elf file, in which we execute it directly.
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// - A script file without shebang, which we execute with our standard shell $PREFIX/bin/sh instead of the
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// system /system/bin/sh. The system shell may vary and may not work at all due to LD_LIBRARY_PATH.
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// - A file with shebang, which we try to handle with e.g. /bin/foo -> $PREFIX/bin/foo.
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String interpreter = null;
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try {
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File file = new File(fileToExecute);
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try (FileInputStream in = new FileInputStream(file)) {
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byte[] buffer = new byte[256];
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int bytesRead = in.read(buffer);
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if (bytesRead > 4) {
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if (buffer[0] == 0x7F && buffer[1] == 'E' && buffer[2] == 'L' && buffer[3] == 'F') {
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// Elf file, do nothing.
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} else if (buffer[0] == '#' && buffer[1] == '!') {
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// Try to parse shebang.
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StringBuilder builder = new StringBuilder();
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for (int i = 2; i < bytesRead; i++) {
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char c = (char) buffer[i];
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if (c == ' ' || c == '\n') {
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if (builder.length() == 0) {
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// Skip whitespace after shebang.
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} else {
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// End of shebang.
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String executable = builder.toString();
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if (executable.startsWith("/usr") || executable.startsWith("/bin")) {
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String[] parts = executable.split("/");
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String binary = parts[parts.length - 1];
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interpreter = TermuxConstants.TERMUX_BIN_PREFIX_DIR_PATH + "/" + binary;
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}
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break;
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}
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} else {
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builder.append(c);
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}
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}
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} else {
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// No shebang and no ELF, use standard shell.
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interpreter = TermuxConstants.TERMUX_BIN_PREFIX_DIR_PATH + "/sh";
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}
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}
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}
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} catch (IOException e) {
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// Ignore.
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}
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List<String> result = new ArrayList<>();
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if (interpreter != null) result.add(interpreter);
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result.add(fileToExecute);
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if (arguments != null) Collections.addAll(result, arguments);
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return result.toArray(new String[0]);
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}
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}
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136
app/src/main/java/com/termux/app/utils/ShellUtils.java
Normal file
136
app/src/main/java/com/termux/app/utils/ShellUtils.java
Normal file
@@ -0,0 +1,136 @@
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package com.termux.app.utils;
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import com.termux.BuildConfig;
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import com.termux.app.TermuxConstants;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.lang.reflect.Field;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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public class ShellUtils {
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public static String[] buildEnvironment(boolean isFailSafe, String workingDirectory) {
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TermuxConstants.TERMUX_HOME_DIR.mkdirs();
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if (workingDirectory == null || workingDirectory.isEmpty()) workingDirectory = TermuxConstants.TERMUX_HOME_DIR_PATH;
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List<String> environment = new ArrayList<>();
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environment.add("TERMUX_VERSION=" + BuildConfig.VERSION_NAME);
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environment.add("TERM=xterm-256color");
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environment.add("COLORTERM=truecolor");
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environment.add("HOME=" + TermuxConstants.TERMUX_HOME_DIR_PATH);
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environment.add("PREFIX=" + TermuxConstants.TERMUX_PREFIX_DIR_PATH);
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environment.add("BOOTCLASSPATH=" + System.getenv("BOOTCLASSPATH"));
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environment.add("ANDROID_ROOT=" + System.getenv("ANDROID_ROOT"));
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environment.add("ANDROID_DATA=" + System.getenv("ANDROID_DATA"));
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// EXTERNAL_STORAGE is needed for /system/bin/am to work on at least
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// Samsung S7 - see https://plus.google.com/110070148244138185604/posts/gp8Lk3aCGp3.
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environment.add("EXTERNAL_STORAGE=" + System.getenv("EXTERNAL_STORAGE"));
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// These variables are needed if running on Android 10 and higher.
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addToEnvIfPresent(environment, "ANDROID_ART_ROOT");
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addToEnvIfPresent(environment, "DEX2OATBOOTCLASSPATH");
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addToEnvIfPresent(environment, "ANDROID_I18N_ROOT");
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addToEnvIfPresent(environment, "ANDROID_RUNTIME_ROOT");
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addToEnvIfPresent(environment, "ANDROID_TZDATA_ROOT");
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if (isFailSafe) {
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// Keep the default path so that system binaries can be used in the failsafe session.
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environment.add("PATH= " + System.getenv("PATH"));
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} else {
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environment.add("LANG=en_US.UTF-8");
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environment.add("PATH=" + TermuxConstants.TERMUX_BIN_PREFIX_DIR_PATH);
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environment.add("PWD=" + workingDirectory);
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environment.add("TMPDIR=" + TermuxConstants.TERMUX_TMP_PREFIX_DIR_PATH);
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}
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return environment.toArray(new String[0]);
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}
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public static void addToEnvIfPresent(List<String> environment, String name) {
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String value = System.getenv(name);
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if (value != null) {
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environment.add(name + "=" + value);
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}
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}
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public static int getPid(Process p) {
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try {
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Field f = p.getClass().getDeclaredField("pid");
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f.setAccessible(true);
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try {
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return f.getInt(p);
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} finally {
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f.setAccessible(false);
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}
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} catch (Throwable e) {
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return -1;
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}
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}
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public static String[] setupProcessArgs(String fileToExecute, String[] arguments) {
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// The file to execute may either be:
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// - An elf file, in which we execute it directly.
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// - A script file without shebang, which we execute with our standard shell $PREFIX/bin/sh instead of the
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// system /system/bin/sh. The system shell may vary and may not work at all due to LD_LIBRARY_PATH.
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// - A file with shebang, which we try to handle with e.g. /bin/foo -> $PREFIX/bin/foo.
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String interpreter = null;
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try {
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File file = new File(fileToExecute);
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try (FileInputStream in = new FileInputStream(file)) {
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byte[] buffer = new byte[256];
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int bytesRead = in.read(buffer);
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if (bytesRead > 4) {
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if (buffer[0] == 0x7F && buffer[1] == 'E' && buffer[2] == 'L' && buffer[3] == 'F') {
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// Elf file, do nothing.
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} else if (buffer[0] == '#' && buffer[1] == '!') {
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// Try to parse shebang.
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StringBuilder builder = new StringBuilder();
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for (int i = 2; i < bytesRead; i++) {
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char c = (char) buffer[i];
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if (c == ' ' || c == '\n') {
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if (builder.length() == 0) {
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// Skip whitespace after shebang.
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} else {
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// End of shebang.
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String executable = builder.toString();
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if (executable.startsWith("/usr") || executable.startsWith("/bin")) {
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String[] parts = executable.split("/");
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String binary = parts[parts.length - 1];
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interpreter = TermuxConstants.TERMUX_BIN_PREFIX_DIR_PATH + "/" + binary;
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}
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break;
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}
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} else {
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builder.append(c);
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}
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}
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} else {
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// No shebang and no ELF, use standard shell.
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interpreter = TermuxConstants.TERMUX_BIN_PREFIX_DIR_PATH + "/sh";
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}
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}
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}
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} catch (IOException e) {
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// Ignore.
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}
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List<String> result = new ArrayList<>();
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if (interpreter != null) result.add(interpreter);
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result.add(fileToExecute);
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if (arguments != null) Collections.addAll(result, arguments);
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return result.toArray(new String[0]);
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}
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public static String getExecutableBasename(String executable) {
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if(executable == null) return null;
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int lastSlash = executable.lastIndexOf('/');
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return (lastSlash == -1) ? executable : executable.substring(lastSlash + 1);
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}
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}
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