add: KernelSU Next recognition support

This commit adds support for recognizing KernelSU (KSUN) manager to ReZygiskd.

zygiskd/src/root_impl/common.c

@@ -30,6 +30,7 @@ void root_impls_setup(void) {
     impl.impl = Multiple;
   } else if (state_ksu.state == Supported) {
     impl.impl = KernelSU;
+    impl.variant = state_ksu.variant;
   } else if (state_apatch.state == Supported) {
     impl.impl = APatch;
   } else if (state_magisk.state == Supported) {

zygiskd/src/root_impl/kernelsu.c

@@ -19,6 +19,9 @@
 #define CMD_GET_VERSION 2
 #define CMD_UID_GRANTED_ROOT 12
 #define CMD_UID_SHOULD_UMOUNT 13
+#define CMD_HOOK_MODE 16
+
+static enum kernelsu_variants variant = KOfficial;
 
 void ksu_get_existence(struct root_impl_state *state) {
   int version = 0;
@@ -42,6 +45,15 @@ void ksu_get_existence(struct root_impl_state *state) {
     }
 
     state->state = Supported;
+
+    char mode[16] = { 0 };
+    prctl((signed int)KERNEL_SU_OPTION, CMD_HOOK_MODE, mode, 0, 0);
+
+    if (mode[0] != '\0') state->variant = KNext;
+    else state->variant = KOfficial;
+
+    state->variant = KNext;
+    variant = state->variant;
   }
   else if (version >= 1 && version <= MIN_KSU_VERSION - 1) state->state = TooOld;
   else state->state = Abnormal;
@@ -68,8 +80,12 @@ bool ksu_uid_should_umount(uid_t uid) {
 }
 
 bool ksu_uid_is_manager(uid_t uid) {
+  const char *manager_path = NULL;
+  if (variant == KOfficial) manager_path = "/data/user_de/0/me.weishu.kernelsu";
+  else if (variant == KNext) manager_path = "/data/user_de/0/com.rifsxd.ksunext";
+
   struct stat s;
-  if (stat("/data/user_de/0/me.weishu.kernelsu", &s) == -1) {
+  if (stat(manager_path, &s) == -1) {
     if (errno != ENOENT) {
       LOGE("Failed to stat KSU manager data directory: %s\n", strerror(errno));
     }

zygiskd/src/root_impl/kernelsu.h

@@ -3,6 +3,11 @@
 
 #include "../constants.h"
 
+enum kernelsu_variants {
+  KOfficial,
+  KNext
+};
+
 void ksu_get_existence(struct root_impl_state *state);
 
 bool ksu_uid_granted_root(uid_t uid);

zygiskd/src/root_impl/magisk.c

@@ -28,7 +28,7 @@ char *magisk_managers[] = {
 #define DEBUG_RAMDISK_MAGISK lp_select("/debug_ramdisk/magisk32", "/debug_ramdisk/magisk64")
 #define BITLESS_DEBUG_RAMDISK_MAGISK "/debug_ramdisk/magisk"
 
-enum magisk_variants variant = Official;
+static enum magisk_variants variant = MOfficial;
 /* INFO: Longest path */
 static char path_to_magisk[sizeof(DEBUG_RAMDISK_MAGISK)] = { 0 };
 bool is_using_sulist = false;
@@ -74,7 +74,7 @@ void magisk_get_existence(struct root_impl_state *state) {
     return;
   }
 
-  state->variant = (uint8_t)Official;
+  state->variant = (uint8_t)MOfficial;
 
   for (unsigned long i = 0; i < sizeof(supported_variants) / sizeof(supported_variants[0]); i++) {
     if (strstr(magisk_info, supported_variants[i])) {

zygiskd/src/root_impl/magisk.h

@@ -4,8 +4,8 @@
 #include "../constants.h"
 
 enum magisk_variants {
-  Official,
-  Kitsune
+  MOfficial,
+  MKitsune
 };
 
 void magisk_get_existence(struct root_impl_state *state);

zygiskd/src/utils.c

@@ -20,6 +20,7 @@
 
 #include "utils.h"
 #include "root_impl/common.h"
+#include "root_impl/kernelsu.h"
 #include "root_impl/magisk.h"
 
 int clean_namespace_fd = 0;
@@ -436,7 +437,8 @@ void stringify_root_impl_name(struct root_impl impl, char *restrict output) {
       break;
     }
     case KernelSU: {
-      strcpy(output, "KernelSU");
+      if (impl.variant == KOfficial) strcpy(output, "KernelSU");
+      else strcpy(output, "KernelSU Next");
 
       break;
     }
@@ -446,11 +448,8 @@ void stringify_root_impl_name(struct root_impl impl, char *restrict output) {
       break;
     }
     case Magisk: {
-      if (impl.variant == 0) {
-        strcpy(output, "Magisk Official");
-      } else {
-        strcpy(output, "Magisk Kitsune");
-      }
+      if (impl.variant == MOfficial) strcpy(output, "Magisk Official");
+      else strcpy(output, "Magisk Kitsune");
 
       break;
     }
@@ -786,7 +785,7 @@ int save_mns_fd(int pid, enum MountNamespaceState mns_state, struct root_impl im
     return -1;
   }
 
-  if (impl.impl == Magisk && impl.variant == Kitsune && mns_state == Clean) {
+  if (impl.impl == Magisk && impl.variant == MKitsune && mns_state == Clean) {
     LOGI("[Magisk] Magisk Kitsune detected, will skip cache first.");
 
     /* INFO: MagiskSU of Kitsune has a special behavior: It is only mounted