userspace: remove simple su

userspace/su/jni/Android.mk

@@ -4,8 +4,3 @@ include $(CLEAR_VARS)
 LOCAL_MODULE := su
 LOCAL_SRC_FILES := su.c
 include $(BUILD_EXECUTABLE)
-
-include $(CLEAR_VARS)
-LOCAL_MODULE := simple_su
-LOCAL_SRC_FILES := simple_su.c
-include $(BUILD_EXECUTABLE)

userspace/su/jni/simple_su.c

@@ -1,10 +0,0 @@
-#include <unistd.h>
-#include <stdlib.h>
-#include <sys/prctl.h>
-
-int main(){
-    int32_t result = 0;
-    prctl(0xdeadbeef, 0, 0, 0, &result);
-    system("/system/bin/sh");
-    return 0;
-}

userspace/su/jni/su.c

@@ -1,110 +1,11 @@
-#include <stdio.h>
-#include <string.h>
 #include <unistd.h>
 #include <stdlib.h>
-#include <stdbool.h>
 #include <sys/prctl.h>
 
-#define CMD_GRANT_ROOT 0
+// This is a simple example. If you want a full-featured "su", please use "/data/adb/ksud debug su".
-#define CMD_GET_VERSION 2
+int main(){
-
-static void help(int status) {
-
-    printf("KernelSU\n"
-        "Usage: su [options] [argument...]\n\n"
-        "Options: \n"
-        "-c Pass command to invoked shell\n"
-        "-v Print version code and exit\n"
-        "-h Display this message and exit\n"
-    );
-    exit(status);
-
-}
-
-static bool ksuctl(int cmd, void * arg1, void * arg2) {
-
     int32_t result = 0;
-    prctl(0xDEADBEEF, cmd, arg1, arg2, & result);
+    prctl(0xdeadbeef, 0, 0, 0, &result);
-    return result == 0xDEADBEEF;
+    system("/system/bin/sh");
-
-}
-
-void elevate() {
-
-    // Talk to Daemon in Kernel Space
-    bool status = ksuctl(CMD_GRANT_ROOT, 0, NULL);
-
-    if (!status) {
-        fprintf(stderr, "Permission denied\n");
-        exit(EXIT_FAILURE);
-    }
-
-}
-
-int getver() {
-
-    elevate();
-
-    int32_t version = -1;
-    ksuctl(CMD_GET_VERSION, & version, NULL);
-    
-    return version;
-}
-
-void su_shell(char * envp[]) {
-
-    char * shell = getenv("SHELL");
-    int status;
-
-    elevate();
-
-    if (shell) {
-        status = execve(shell, NULL, envp);
-    } else {
-        status = execve("/system/bin/sh", NULL, envp);
-    }
-
-    exit(status);
-}
-
-void su_command(char * command[], int len) {
-
-    elevate();
-    int status;
-
-    if (len == 1) {
-        status = system(command[0]);
-    } else {
-        status = execvp(command[0], command);
-    }
-    exit(status);
-}
-
-int main(int argc, char * argv[], char * envp[]) {
-
-    if (argc == 1) {
-        su_shell(envp);
-    }
-
-    int opt;
-
-    while ((opt = getopt(argc, argv, "vch")) != -1) {
-        switch (opt) {
-        case 'v': {
-            int version = getver();
-            printf("%d:KernelSU\n", version);
-            exit(EXIT_SUCCESS);
-        }
-        case 'c':
-            if (argc < 3) {
-                fprintf(stderr, "ERROR: -c requires an argument\n\n");
-                help(EXIT_FAILURE);
-            }
-            su_command(argv + 2, argc - 2);
-        case 'h':
-        default:
-            help(EXIT_SUCCESS);
-        }
-    }
     return 0;
 }