diff --git a/Process.cpp b/Process.cpp
new file mode 100644
index 0000000..c3c9904
--- /dev/null
+++ b/Process.cpp
@@ -0,0 +1,221 @@
+/*
+ * Copyright (C) 2008 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 <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <ctype.h>
+#include <pwd.h>
+#include <stdlib.h>
+#include <poll.h>
+#include <sys/stat.h>
+#include <signal.h>
+
+#define LOG_TAG "ProcessKiller"
+#include <cutils/log.h>
+
+#include "Process.h"
+
+int Process::readSymLink(const char *path, char *link, size_t max) {
+    struct stat s;
+    int length;
+
+    if (lstat(path, &s) < 0)
+        return 0;
+    if ((s.st_mode & S_IFMT) != S_IFLNK)
+        return 0;
+   
+    // we have a symlink    
+    length = readlink(path, link, max- 1);
+    if (length <= 0) 
+        return 0;
+    link[length] = 0;
+    return 1;
+}
+
+int Process::pathMatchesMountPoint(const char* path, const char* mountPoint) {
+    int length = strlen(mountPoint);
+    if (length > 1 && strncmp(path, mountPoint, length) == 0) {
+        // we need to do extra checking if mountPoint does not end in a '/'
+        if (mountPoint[length - 1] == '/')
+            return 1;
+        // if mountPoint does not have a trailing slash, we need to make sure
+        // there is one in the path to avoid partial matches.
+        return (path[length] == 0 || path[length] == '/');
+    }
+    
+    return 0;
+}
+
+void Process::getProcessName(int pid, char *buffer, size_t max) {
+    int fd;
+    snprintf(buffer, max, "/proc/%d/cmdline", pid);
+    fd = open(buffer, O_RDONLY);
+    if (fd < 0) {
+        strcpy(buffer, "???");
+    } else {
+        int length = read(fd, buffer, max - 1);
+        buffer[length] = 0;
+        close(fd);
+    }
+}
+
+int Process::checkFileDescriptorSymLinks(int pid, const char *mountPoint) {
+    return checkFileDescriptorSymLinks(pid, mountPoint, NULL, 0);
+}
+
+int Process::checkFileDescriptorSymLinks(int pid, const char *mountPoint, char *openFilename, size_t max) {
+
+
+    // compute path to process's directory of open files
+    char    path[PATH_MAX];
+    sprintf(path, "/proc/%d/fd", pid);
+    DIR *dir = opendir(path);
+    if (!dir)
+        return 0;
+
+    // remember length of the path
+    int parent_length = strlen(path);
+    // append a trailing '/'
+    path[parent_length++] = '/';
+
+    struct dirent* de;
+    while ((de = readdir(dir))) {
+        if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
+            continue;
+        
+        // append the file name, after truncating to parent directory
+        path[parent_length] = 0;
+        strcat(path, de->d_name);
+
+        char link[PATH_MAX];
+
+        if (readSymLink(path, link, sizeof(link)) && pathMatchesMountPoint(link, mountPoint)) {
+            if (openFilename) {
+                memset(openFilename, 0, max);
+                strncpy(openFilename, link, max-1);
+            }
+            closedir(dir);
+            return 1;
+        }
+    }
+
+    closedir(dir);
+    return 0;
+}
+
+int Process::checkFileMaps(int pid, const char *mountPoint) {
+    return checkFileMaps(pid, mountPoint, NULL, 0);
+}
+
+int Process::checkFileMaps(int pid, const char *mountPoint, char *openFilename, size_t max) {
+    FILE *file;
+    char buffer[PATH_MAX + 100];
+
+    sprintf(buffer, "/proc/%d/maps", pid);
+    file = fopen(buffer, "r");
+    if (!file)
+        return 0;
+    
+    while (fgets(buffer, sizeof(buffer), file)) {
+        // skip to the path
+        const char* path = strchr(buffer, '/');
+        if (path && pathMatchesMountPoint(path, mountPoint)) {
+            if (openFilename) {
+                memset(openFilename, 0, max);
+                strncpy(openFilename, path, max-1);
+            }
+            fclose(file);
+            return 1;
+        }
+    }
+    
+    fclose(file);
+    return 0;
+}
+
+int Process::checkSymLink(int pid, const char *mountPoint, const char *name) {
+    char    path[PATH_MAX];
+    char    link[PATH_MAX];
+
+    sprintf(path, "/proc/%d/%s", pid, name);
+    if (readSymLink(path, link, sizeof(link)) && pathMatchesMountPoint(link, mountPoint)) 
+        return 1;
+    return 0;
+}
+
+int Process::getPid(const char *s) {
+    int result = 0;
+    while (*s) {
+        if (!isdigit(*s)) return -1;
+        result = 10 * result + (*s++ - '0');
+    }
+    return result;
+}
+
+/*
+ * Hunt down processes that have files open at the given mount point.
+ * action = 0 to just warn,
+ * action = 1 to SIGHUP,
+ * action = 2 to SIGKILL
+ */
+// hunt down and kill processes that have files open on the given mount point
+void Process::killProcessesWithOpenFiles(const char *path, int action) {
+    DIR*    dir;
+    struct dirent* de;
+
+    if (!(dir = opendir("/proc"))) {
+        LOGE("opendir failed (%s)", strerror(errno));
+        return;
+    }
+
+    while ((de = readdir(dir))) {
+        int killed = 0;
+        int pid = getPid(de->d_name);
+        char name[PATH_MAX];
+
+        if (pid == -1)
+            continue;
+        getProcessName(pid, name, sizeof(name));
+
+        char openfile[PATH_MAX];
+
+        if (checkFileDescriptorSymLinks(pid, path, openfile, sizeof(openfile))) {
+            LOGE("Process %s (%d) has open file %s", name, pid, openfile);
+        } else if (checkFileMaps(pid, path, openfile, sizeof(openfile))) {
+            LOGE("Process %s (%d) has open filemap for %s", name, pid, openfile);
+        } else if (checkSymLink(pid, path, "cwd")) {
+            LOGE("Process %s (%d) has cwd within %s", name, pid, path);
+        } else if (checkSymLink(pid, path, "root")) {
+            LOGE("Process %s (%d) has chroot within %s", name, pid, path);
+        } else if (checkSymLink(pid, path, "exe")) {
+            LOGE("Process %s (%d) has executable path within %s", name, pid, path);
+        } else {
+            continue;
+        }
+        if (action == 1) {
+            LOGW("Sending SIGHUP to process %d", pid);
+            kill(pid, SIGTERM);
+        } else if (action == 2) {
+            LOGE("Sending SIGKILL to process %d", pid);
+            kill(pid, SIGKILL);
+        }
+    }
+    closedir(dir);
+}