diff --git a/install28/adb_install.cpp b/install28/adb_install.cpp
new file mode 100755
index 0000000..5b57641
--- /dev/null
+++ b/install28/adb_install.cpp
@@ -0,0 +1,221 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "cutils/properties.h"
+
+#include "common.h"
+#ifdef USE_OLD_VERIFIER
+#include "verifier24/verifier.h"
+#include "ui.h"
+#elif USE_28_VERIFIER
+#include "verifier28/verifier.h"
+#include "verifier28/adb_install.h"
+#include "verifier28/ui.h"
+#include "verifier28/fuse_sideload.h"
+#else
+#include "install/install.h"
+#endif
+
+static void set_usb_driver(bool enabled) {
+  char configfs[PROPERTY_VALUE_MAX];
+  property_get("sys.usb.configfs", configfs, "false");
+  if (strcmp(configfs, "false") == 0 || strcmp(configfs, "0") == 0)
+    return;
+
+  int fd = open("/sys/class/android_usb/android0/enable", O_WRONLY);
+  if (fd < 0) {
+/*  These error messages show when built in older Android branches (e.g. Gingerbread)
+    It's not a critical error so we're disabling the error messages.
+    ui->Print("failed to open driver control: %s\n", strerror(errno));
+*/
+    printf("failed to open driver control: %s\n", strerror(errno));
+    return;
+  }
+
+  if (TEMP_FAILURE_RETRY(write(fd, enabled ? "1" : "0", 1)) == -1) {
+/*
+    ui->Print("failed to set driver control: %s\n", strerror(errno));
+*/
+    printf("failed to set driver control: %s\n", strerror(errno));
+  }
+  if (close(fd) < 0) {
+/*
+    ui->Print("failed to close driver control: %s\n", strerror(errno));
+*/
+    printf("failed to close driver control: %s\n", strerror(errno));
+  }
+}
+
+// On Android 8.0 for some reason init can't seem to completely stop adbd
+// so we have to kill it too if it doesn't die on its own.
+static void kill_adbd() {
+  DIR* dir = opendir("/proc");
+  if (dir) {
+    struct dirent* de = 0;
+
+    while ((de = readdir(dir)) != 0) {
+      if (strcmp(de->d_name, ".") == 0 || strcmp(de->d_name, "..") == 0)
+        continue;
+
+      int pid = -1;
+      int ret = sscanf(de->d_name, "%d", &pid);
+
+      if (ret == 1) {
+        char cmdpath[PATH_MAX];
+        sprintf(cmdpath, "/proc/%d/cmdline", pid);
+
+        FILE* file = fopen(cmdpath, "r");
+        size_t task_size = PATH_MAX;
+        char task[PATH_MAX];
+        char* p = task;
+        if (getline(&p, &task_size, file) > 0) {
+          if (strstr(task, "adbd") != 0) {
+            printf("adbd pid %d found, sending kill.\n", pid);
+            kill(pid, SIGINT);
+            usleep(5000);
+            kill(pid, SIGKILL);
+          }
+        }
+        fclose(file);
+      }
+    }
+    closedir(dir);
+  }
+}
+
+static void stop_adbd() {
+  printf("Stopping adbd...\n");
+  property_set("ctl.stop", "adbd");
+  usleep(5000);
+  kill_adbd();
+  set_usb_driver(false);
+}
+
+static bool is_ro_debuggable() {
+  char value[PROPERTY_VALUE_MAX+1];
+  return (property_get("ro.debuggable", value, NULL) == 1 && value[0] == '1');
+}
+
+static void maybe_restart_adbd() {
+  if (is_ro_debuggable()) {
+    printf("Restarting adbd...\n");
+    set_usb_driver(true);
+    property_set("ctl.start", "adbd");
+  }
+}
+
+// How long (in seconds) we wait for the host to start sending us a
+// package, before timing out.
+#define ADB_INSTALL_TIMEOUT 300
+
+int
+apply_from_adb(const char* install_file, pid_t* child_pid) {
+
+  stop_adbd();
+  set_usb_driver(true);
+/*
+int apply_from_adb(RecoveryUI* ui, bool* wipe_cache, const char* install_file) {
+  modified_flash = true;
+
+  stop_adbd(ui);
+  set_usb_driver(ui, true);
+
+  ui->Print("\n\nNow send the package you want to apply\n"
+            "to the device with \"adb sideload <filename>\"...\n");
+*/
+  pid_t child;
+  if ((child = fork()) == 0) {
+    execl("/sbin/recovery", "recovery", "--adbd", install_file, NULL);
+    _exit(-1);
+  }
+
+  *child_pid = child;
+  // caller can now kill the child thread from another thread
+
+  // FUSE_SIDELOAD_HOST_PATHNAME will start to exist once the host
+  // connects and starts serving a package.  Poll for its
+  // appearance.  (Note that inotify doesn't work with FUSE.)
+  int result = INSTALL_ERROR;
+  int status;
+  bool waited = false;
+  struct stat st;
+  for (int i = 0; i < ADB_INSTALL_TIMEOUT; ++i) {
+    if (waitpid(child, &status, WNOHANG) != 0) {
+      result = -1;
+      waited = true;
+      break;
+    }
+
+    if (stat(FUSE_SIDELOAD_HOST_PATHNAME, &st) != 0) {
+      if (errno == ENOENT && i < ADB_INSTALL_TIMEOUT-1) {
+        sleep(1);
+        continue;
+      } else {
+        printf("\nTimed out waiting for package: %s\n\n", strerror(errno));
+        result = -1;
+        kill(child, SIGKILL);
+        break;
+      }
+    }
+    // Install is handled elsewhere in TWRP
+    //install_package(FUSE_SIDELOAD_HOST_PATHNAME, wipe_cache, install_file, false);
+    return 0;
+  }
+
+  // if we got here, something failed
+  *child_pid = 0;
+
+  if (!waited) {
+    // Calling stat() on this magic filename signals the minadbd
+    // subprocess to shut down.
+    stat(FUSE_SIDELOAD_HOST_EXIT_PATHNAME, &st);
+
+    // TODO(dougz): there should be a way to cancel waiting for a
+    // package (by pushing some button combo on the device).  For now
+    // you just have to 'adb sideload' a file that's not a valid
+    // package, like "/dev/null".
+    waitpid(child, &status, 0);
+  }
+
+  if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+    if (WEXITSTATUS(status) == 3) {
+      printf("\nYou need adb 1.0.32 or newer to sideload\nto this device.\n\n");
+      result = -2;
+    } else if (!WIFSIGNALED(status)) {
+      printf("adbd status %d\n", WEXITSTATUS(status));
+    }
+  }
+
+  set_usb_driver(false);
+  maybe_restart_adbd();
+
+  return result;
+}