Fix device detection scripts and logic

app/src/main/java/com/topjohnwu/magisk/core/Config.kt

@@ -114,7 +114,6 @@ object Config : PreferenceConfig, DBConfig {
 
     @JvmField var keepVerity = false
     @JvmField var keepEnc = false
-    @JvmField var patchVbmeta = false
     @JvmField var recovery = false
 
     var bootId by preference(Key.BOOT_ID, "")

app/src/main/java/com/topjohnwu/magisk/core/Info.kt

@@ -32,7 +32,7 @@ object Info {
     @JvmField val isZygiskEnabled = System.getenv("ZYGISK_ENABLED") == "1"
     @JvmStatic val isFDE get() = crypto == "block"
     @JvmField var ramdisk = false
-    @JvmField var vbmeta = false
+    var patchBootVbmeta = false
     var crypto = ""
     var noDataExec = false
     var isRooted = false

app/src/main/java/com/topjohnwu/magisk/core/tasks/MagiskInstaller.kt

@@ -490,7 +490,7 @@ abstract class MagiskInstallImpl protected constructor(
             "cd $installDir",
             "KEEPFORCEENCRYPT=${Config.keepEnc} " +
             "KEEPVERITY=${Config.keepVerity} " +
-            "PATCHVBMETAFLAG=${Config.patchVbmeta} " +
+            "PATCHVBMETAFLAG=${Info.patchBootVbmeta} " +
             "RECOVERYMODE=${Config.recovery} " +
             "LEGACYSAR=${Info.legacySAR} " +
             "sh boot_patch.sh $srcBoot")

app/src/main/java/com/topjohnwu/magisk/core/utils/ShellInit.kt

@@ -73,18 +73,17 @@ class ShellInit : Shell.Initializer() {
         fun getVar(name: String) = fastCmd("echo \$$name")
         fun getBool(name: String) = getVar(name).toBoolean()
 
-        Info.isSAR = getBool("SYSTEM_ROOT")
+        Info.isSAR = getBool("SYSTEM_AS_ROOT")
         Info.ramdisk = getBool("RAMDISKEXIST")
-        Info.vbmeta = getBool("VBMETAEXIST")
         Info.isAB = getBool("ISAB")
         Info.crypto = getVar("CRYPTOTYPE")
+        Info.patchBootVbmeta = getBool("PATCHVBMETAFLAG")
         Info.legacySAR = getBool("LEGACYSAR")
 
         // Default presets
         Config.recovery = getBool("RECOVERYMODE")
         Config.keepVerity = getBool("KEEPVERITY")
         Config.keepEnc = getBool("KEEPFORCEENCRYPT")
-        Config.patchVbmeta = getBool("PATCHVBMETAFLAG")
 
         return true
     }

app/src/main/java/com/topjohnwu/magisk/ui/install/InstallViewModel.kt

@@ -104,7 +104,6 @@ class InstallViewModel(svc: NetworkService, markwon: Markwon) : BaseViewModel()
             step,
             Config.keepVerity,
             Config.keepEnc,
-            Config.patchVbmeta,
             Config.recovery
         ))
     }
@@ -115,7 +114,6 @@ class InstallViewModel(svc: NetworkService, markwon: Markwon) : BaseViewModel()
             step = it.step
             Config.keepVerity = it.keepVerity
             Config.keepEnc = it.keepEnc
-            Config.patchVbmeta = it.patchVbmeta
             Config.recovery = it.recovery
         }
     }
@@ -136,7 +134,6 @@ class InstallViewModel(svc: NetworkService, markwon: Markwon) : BaseViewModel()
         val step: Int,
         val keepVerity: Boolean,
         val keepEnc: Boolean,
-        val patchVbmeta: Boolean,
         val recovery: Boolean,
     ) : Parcelable
 

app/src/main/res/raw/manager.sh

@@ -193,27 +193,29 @@ check_encryption() {
 mount_partitions() {
   [ "$(getprop ro.build.ab_update)" = "true" ] && SLOT=$(getprop ro.boot.slot_suffix)
   # Check whether non rootfs root dir exists
-  SYSTEM_ROOT=false
-  grep ' / ' /proc/mounts | grep -qv 'rootfs' && SYSTEM_ROOT=true
+  SYSTEM_AS_ROOT=false
+  grep ' / ' /proc/mounts | grep -qv 'rootfs' && SYSTEM_AS_ROOT=true
 }
 
 get_flags() {
-  KEEPVERITY=$SYSTEM_ROOT
+  KEEPVERITY=$SYSTEM_AS_ROOT
   ISENCRYPTED=false
   [ "$(getprop ro.crypto.state)" = "encrypted" ] && ISENCRYPTED=true
   KEEPFORCEENCRYPT=$ISENCRYPTED
-  VBMETAEXIST=false
   if [ -n "$(getprop ro.boot.vbmeta.device)" -o -n "$(getprop ro.boot.vbmeta.size)" ]; then
-    VBMETAEXIST=true
+    PATCHVBMETAFLAG=false
   elif getprop ro.product.ab_ota_partitions | grep -wq vbmeta; then
-    VBMETAEXIST=true
+    PATCHVBMETAFLAG=false
+  else
+    PATCHVBMETAFLAG=true
   fi
-  # Preset PATCHVBMETAFLAG to false in the non-root case
-  PATCHVBMETAFLAG=false
-  # Make sure RECOVERYMODE has value
   [ -z $RECOVERYMODE ] && RECOVERYMODE=false
-  if grep ' / ' /proc/mounts | grep -q '/dev/root'; then
-    LEGACYSAR=true
+  if $SYSTEM_AS_ROOT; then
+    if grep ' / ' /proc/mounts | grep -q '/dev/root'; then
+      LEGACYSAR=true
+    else
+      LEGACYSAR=false
+    fi
   else
     LEGACYSAR=false
   fi