Modify the bf::exists function to check error.value (#275)
[platform/core/dotnet/launcher.git] / NativeLauncher / util / utils.cc
index f93f7d1..bb1ea62 100644 (file)
 #include <unistd.h>
 #include <limits.h>
 #include <strings.h>
+#include <pkgmgr-info.h>
+#include <pkgmgr_installer_info.h>
+#include <sys/smack.h>
+#include <sys/prctl.h>
+#include <openssl/sha.h>
 
 #include <cstdlib>
 #include <cstring>
 #include <unordered_map>
 #include <vector>
 #include <iterator>
+#include <fstream>
 #include <sstream>
 #include <map>
+#include <iomanip>
 
 #include "log.h"
 #include "utils.h"
@@ -55,18 +62,6 @@ bool isNativeImage(const std::string& fileName)
        return iCompare(fileName, fileName.size()-7, ".ni", 0, 3);
 }
 
-std::string readSelfPath()
-{
-       char buff[PATH_MAX];
-       ssize_t len = ::readlink("/proc/self/exe", buff, sizeof(buff)-1);
-       if (len != -1) {
-               buff[len] = '\0';
-               return std::string(buff);
-       }
-
-       return "";
-}
-
 std::string concatPath(const std::string& path1, const std::string& path2)
 {
        std::string path(path1);
@@ -90,17 +85,166 @@ void splitPath(const std::string& path, std::vector<std::string>& out)
        }
 }
 
-std::string absolutePath(const std::string& path)
+std::string getAbsolutePath(const std::string& path)
 {
        std::string absPath;
-       char realPath[PATH_MAX];
-       if (realpath(path.c_str(), realPath) != nullptr && realPath[0] != '\0')
+       char *realPath = realpath(path.c_str(), NULL);
+       if (realPath) {
                absPath.assign(realPath);
+               free(realPath);
+       }
 
        return absPath;
 }
 
-std::string baseName(const std::string& path)
+std::string getRootPath(const std::string& pkgId)
+{
+       int ret = 0;
+       char *path = 0;
+       uid_t uid = 0;
+       std::string rootPath;
+
+       if (pkgmgr_installer_info_get_target_uid(&uid) < 0) {
+               _ERR("Failed to get UID");
+               return rootPath;
+       }
+
+       pkgmgrinfo_pkginfo_h handle;
+       if (uid == 0) {
+               ret = pkgmgrinfo_pkginfo_get_pkginfo(pkgId.c_str(), &handle);
+               if (ret != PMINFO_R_OK) {
+                       return rootPath;
+               }
+       } else {
+               ret = pkgmgrinfo_pkginfo_get_usr_pkginfo(pkgId.c_str(), uid, &handle);
+               if (ret != PMINFO_R_OK) {
+                       return rootPath;
+               }
+       }
+
+       ret = pkgmgrinfo_pkginfo_get_root_path(handle, &path);
+       if (ret != PMINFO_R_OK) {
+               pkgmgrinfo_pkginfo_destroy_pkginfo(handle);
+               return rootPath;
+       }
+       rootPath = path;
+       pkgmgrinfo_pkginfo_destroy_pkginfo(handle);
+
+       return rootPath;
+}
+
+std::string getExecName(const std::string& pkgId)
+{
+       char *exec = NULL;
+       char *appId = 0;
+       std::string execName;
+
+       pkgmgrinfo_pkginfo_h pkg_handle;
+       int ret = pkgmgrinfo_pkginfo_get_pkginfo(pkgId.c_str(), &pkg_handle);
+       if (ret != PMINFO_R_OK) {
+               return execName;
+       }
+       ret = pkgmgrinfo_pkginfo_get_mainappid(pkg_handle, &appId);
+       if (ret != PMINFO_R_OK) {
+               pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+               return execName;
+       }
+
+       pkgmgrinfo_appinfo_h app_handle;
+       ret = pkgmgrinfo_appinfo_get_appinfo(appId, &app_handle);
+       if (ret != PMINFO_R_OK) {
+               pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+               return execName;
+       }
+       ret = pkgmgrinfo_appinfo_get_exec(app_handle, &exec);
+       if (ret != PMINFO_R_OK) {
+               pkgmgrinfo_appinfo_destroy_appinfo(app_handle);
+               pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+               return execName;
+       }
+       execName = std::string(exec).substr(std::string(exec).rfind('/') + 1);
+
+       pkgmgrinfo_appinfo_destroy_appinfo(app_handle);
+       pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+
+       return execName;
+}
+
+std::string getAppType(const std::string& pkgId)
+{
+       char *appId = 0;
+       char *type = 0;
+       std::string appType;
+
+       pkgmgrinfo_pkginfo_h pkg_handle;
+       int ret = pkgmgrinfo_pkginfo_get_pkginfo(pkgId.c_str(), &pkg_handle);
+       if (ret != PMINFO_R_OK) {
+               return appType;
+       }
+       ret = pkgmgrinfo_pkginfo_get_mainappid(pkg_handle, &appId);
+       if (ret != PMINFO_R_OK) {
+               pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+               return appType;
+       }
+
+       pkgmgrinfo_appinfo_h app_handle;
+       ret = pkgmgrinfo_appinfo_get_appinfo(appId, &app_handle);
+       if (ret != PMINFO_R_OK) {
+               pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+               return appType;
+       }
+       ret = pkgmgrinfo_appinfo_get_apptype(app_handle, &type);
+       if (ret != PMINFO_R_OK) {
+               pkgmgrinfo_appinfo_destroy_appinfo(app_handle);
+               pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+               return appType;
+       }
+       appType = type;
+
+       pkgmgrinfo_appinfo_destroy_appinfo(app_handle);
+       pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+
+       return appType;
+}
+
+std::string getMetadataValue(const std::string& pkgId, const std::string& key)
+{
+       char *value = NULL;
+       char *appId = 0;
+       std::string metadataValue;
+
+       pkgmgrinfo_pkginfo_h pkg_handle;
+       int ret = pkgmgrinfo_pkginfo_get_pkginfo(pkgId.c_str(), &pkg_handle);
+       if (ret != PMINFO_R_OK) {
+               return metadataValue;
+       }
+       ret = pkgmgrinfo_pkginfo_get_mainappid(pkg_handle, &appId);
+       if (ret != PMINFO_R_OK) {
+               pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+               return metadataValue;
+       }
+
+       pkgmgrinfo_appinfo_h app_handle;
+       ret = pkgmgrinfo_appinfo_get_appinfo(appId, &app_handle);
+       if (ret != PMINFO_R_OK) {
+               pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+               return metadataValue;
+       }
+       ret = pkgmgrinfo_appinfo_get_metadata_value(app_handle, key.c_str(), &value);
+       if (ret != PMINFO_R_OK) {
+               pkgmgrinfo_appinfo_destroy_appinfo(app_handle);
+               pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+               return metadataValue;
+       }
+       metadataValue = std::string(value);
+
+       pkgmgrinfo_appinfo_destroy_appinfo(app_handle);
+       pkgmgrinfo_pkginfo_destroy_pkginfo(pkg_handle);
+
+       return metadataValue;
+}
+
+std::string getBaseName(const std::string& path)
 {
        auto pos = path.find_last_of(PATH_SEPARATOR);
        if (pos != std::string::npos)
@@ -110,68 +254,93 @@ std::string baseName(const std::string& path)
        return path;
 }
 
-bool isFileExist(const std::string& path)
+std::string replaceAll(const std::string& str, const std::string& pattern, const std::string& replace)
+{
+       std::string result = str;
+       std::string::size_type pos = 0;
+       std::string::size_type offset = 0;
+
+       while ((pos = result.find(pattern, offset)) != std::string::npos) {
+               result.replace(result.begin() + pos, result.begin() + pos + pattern.size(), replace);
+               offset = pos + replace.size();
+       }
+
+       return result;
+}
+
+bool isFile(const std::string& path)
+{
+       struct stat sb;
+       return lstat(path.c_str(), &sb) == 0;
+}
+
+bool isDirectory(const std::string& path)
 {
        struct stat sb;
-       return stat(path.c_str(), &sb) == 0;
+       if (stat(path.c_str(), &sb) != 0) {
+               return false;
+       }
+       if (sb.st_mode & S_IFDIR) {
+               return true;
+       } else {
+               return false;
+       }
 }
 
-std::string stripNiDLL(const std::string& path)
+std::string getAssemblyNameFromPath(const std::string& path)
 {
-       std::string niPath(path);
-       if (path.size() < 5) return niPath;
-       if (!strncasecmp(path.c_str() + path.size() - 4, ".dll", 4))
-               niPath = path.substr(0, path.size()-4);
-       else if (!strncasecmp(path.c_str() + path.size() - 4, ".exe", 4))
-               niPath = path.substr(0, path.size()-4);
+       std::string ret(getFileName(path));
 
-       if (!strncasecmp(niPath.c_str() + niPath.size() - 3, ".ni", 3))
-               return niPath.substr(0, niPath.size()-3);
+       if (ret.find_last_of(".") == std::string::npos)
+               return ret;
+       ret.erase(ret.find_last_of("."));
 
-       return niPath;
+       if (ret.size() > 3 && std::equal(ret.begin() + ret.size() - 3, ret.end(), ".ni"))
+               ret.erase(ret.size() - 3);
+
+       return ret;
 }
 
-void assembliesInDirectory(const std::vector<std::string>& directories, std::string& tpaList)
+void addAssembliesFromDirectories(const std::vector<std::string>& directories, std::string& list)
 {
-       std::map<std::string, std::string> assemblyList;
-       std::map<std::string, std::string> tmpList;
-
-       auto reader = [&assemblyList, &tmpList] (const std::string& path, const char* name) {
-               if (isManagedAssembly(path) || isNativeImage(path)) {
-                       std::string dllName = stripNiDLL(name);
-                       std::pair<std::map<std::string, std::string>::iterator, bool> ret;
-                       ret = tmpList.insert(std::pair<std::string, std::string>(dllName, path));
-                       if (ret.second == false) {
-                               if (isNativeImage(path))
-                                       tmpList[dllName] = path;
+       std::vector<std::string> assems;
+       std::unordered_map<std::string, std::string> assemPaths;
+
+       auto reader = [&assems, &assemPaths](const std::string& path, const std::string& filename) {
+               if (isManagedAssembly(filename) || isNativeImage(filename)) {
+                       std::string assem = getAssemblyNameFromPath(filename);
+
+                       if (assemPaths.count(assem) == 0) {
+                               assems.push_back(assem);
+                               assemPaths[assem] = path;
+                       } else if (isManagedAssembly(assemPaths[assem]) && isNativeImage(filename)) {
+                               // Update only if a native image is found in the same directory.
+                               // For example, if we have two directories = { X, Y } where X contains A.dll and
+                               // Y contains both A.dll and A.ni.dll, always A.dll in X will be used.
+                               if (getBaseName(assemPaths[assem]).compare(getBaseName(path)) == 0)
+                                       assemPaths[assem] = path;
                        }
                }
        };
+       for (auto& directory : directories)
+               scanFilesInDirectory(directory, reader, 0);
 
-       for (auto directory : directories) {
-               scanFilesInDir(directory.c_str(), reader, 1);
-               // merge scaned dll list to tpa list.
-               // if the dll is already exist in the list, that is skipped.
-               assemblyList.insert(tmpList.begin(), tmpList.end());
-       }
+       if (!list.empty() && list.back() != ':')
+               list.push_back(':');
 
-       std::map<std::string, std::string>::iterator it;
-       for (it = assemblyList.begin(); it != assemblyList.end(); it++)
-               tpaList += it->second + ':';
+       for (auto& assem : assems)
+               list += assemPaths[assem] + ":";
 
-       if (tpaList.back() == ':')
-               tpaList.pop_back();
+       if (list.back() == ':')
+               list.pop_back();
 }
 
-void scanFilesInDir(const std::string& directory, FileReader reader, unsigned int depth)
+void scanFilesInDirectory(const std::string& directory, FileReader reader, unsigned int depth)
 {
        DIR *dir;
        struct dirent* entry;
        bool isDir;
 
-       if (strstr(directory.c_str(), "TAC.Release") != NULL)
-               return; // skip nitool --regen-all-app (--r2r)
-
        dir = opendir(directory.c_str());
 
        if (dir == nullptr)
@@ -187,31 +356,66 @@ void scanFilesInDir(const std::string& directory, FileReader reader, unsigned in
                        case DT_DIR:
                                isDir = true;
                                break;
+                       // symlink is added to the list even if there is no original file.
+                       // It used to remove broken symlinks related to TAC
                        case DT_LNK:
+                               break;
                        case DT_UNKNOWN:
-                               struct stat sb;
-                               if (stat(path.c_str(), &sb) == -1)
-                                       continue;
-
-                               if (S_ISREG(sb.st_mode) || S_ISDIR(sb.st_mode))
-                                       break;
+                               continue;
                        default:
                                continue;
                }
                if (!isDir)
                        reader(path, entry->d_name);
-               else if (depth > 1 && strcmp(entry->d_name, ".") && strcmp(entry->d_name, ".."))
+               else if (depth > 0 && strcmp(entry->d_name, ".") && strcmp(entry->d_name, ".."))
                        innerDirectories.push_back(path);
        }
 
-       if (depth != 0)
+       if (depth > 0)
                for (auto& d : innerDirectories)
-                       scanFilesInDir(d.c_str(), reader, depth - 1);
+                       scanFilesInDirectory(d, reader, depth - 1);
 
        closedir(dir);
 }
 
-static bool setOwnership(const bf::path& path, uid_t uid, gid_t gid) {
+void copySmackAndOwnership(const std::string& fromPath, const std::string& toPath, bool isSymlink)
+{
+       char* label = NULL;
+       struct stat info;
+
+       if (isSymlink) {
+               // change smack label for symbolic link.
+               if (smack_lgetlabel(fromPath.c_str(), &label, SMACK_LABEL_ACCESS) == 0) {
+                       if (smack_lsetlabel(toPath.c_str(), label, SMACK_LABEL_ACCESS) < 0) {
+                               fprintf(stderr, "Fail to set smack label\n");
+                       }
+                       free(label);
+               }
+
+               // change owner and groups for symbolic link.
+               if (!lstat(fromPath.c_str(), &info)) {
+                       if (lchown(toPath.c_str(), info.st_uid, info.st_gid) == -1)
+                               fprintf(stderr, "Failed to change owner and group name\n");
+               }
+       } else {
+               // change smack label
+               if (smack_getlabel(fromPath.c_str(), &label, SMACK_LABEL_ACCESS) == 0) {
+                       if (smack_setlabel(toPath.c_str(), label, SMACK_LABEL_ACCESS) < 0) {
+                               fprintf(stderr, "Fail to set smack label\n");
+                       }
+                       free(label);
+               }
+
+               // change owner and groups for generated ni file.
+               if (!stat(fromPath.c_str(), &info)) {
+                       if (chown(toPath.c_str(), info.st_uid, info.st_gid) == -1)
+                               fprintf(stderr, "Failed to change owner and group name\n");
+               }
+       }
+}
+
+static bool setOwnership(const bf::path& path, uid_t uid, gid_t gid)
+{
        int fd = open(path.c_str(), O_RDONLY);
        if (fd < 0) {
                _ERR("Can't open directory: %s", path.c_str());
@@ -226,7 +430,8 @@ static bool setOwnership(const bf::path& path, uid_t uid, gid_t gid) {
        return true;
 }
 
-static bool setDirPermissions(const bf::path& path, bf::perms permissions) {
+static bool setDirPermissions(const bf::path& path, bf::perms permissions)
+{
        bs::error_code error;
        bf::permissions(path, permissions, error);
        if (error) {
@@ -236,7 +441,8 @@ static bool setDirPermissions(const bf::path& path, bf::perms permissions) {
        return true;
 }
 
-static bool setDirOwnershipAndPermissions(const bf::path& path, bf::perms permissions, uid_t uid, gid_t gid) {
+static bool setDirOwnershipAndPermissions(const bf::path& path, bf::perms permissions, uid_t uid, gid_t gid)
+{
        if (!setOwnership(path, uid, gid)) {
                _ERR("Failed to change owner: %s, (uid: %d, gid: %d)", path.c_str(), uid, gid);
                return false;
@@ -248,9 +454,10 @@ static bool setDirOwnershipAndPermissions(const bf::path& path, bf::perms permis
        return true;
 }
 
-static bool copyOwnershipAndPermissions(const bf::path& path, const bf::path& dst) {
-       if (!bf::exists(path)) {
-               _ERR("Failed to copy ownership and permissions from %s to %s", path.c_str(), dst.c_str());
+static bool copyOwnershipAndPermissions(const bf::path& path, const bf::path& path2)
+{
+       if (!exist(path)) {
+               _ERR("Failed to copy ownership and permissions from %s to %s", path.c_str(), path2.c_str());
                return false;
        }
        bf::perms permissions = bf::status(path).permissions();
@@ -258,15 +465,28 @@ static bool copyOwnershipAndPermissions(const bf::path& path, const bf::path& ds
        if (stat(path.c_str(), &stats) != 0) {
                return false;
        }
-       if (!setDirOwnershipAndPermissions(dst, permissions, stats.st_uid, stats.st_gid)) {
-               _ERR("Failed to copy ownership and permissions from %s to %s", path.c_str(), dst.c_str());
+       if (!setDirOwnershipAndPermissions(path2, permissions, stats.st_uid, stats.st_gid)) {
+               _ERR("Failed to copy ownership and permissions from %s to %s", path.c_str(), path2.c_str());
                return false;
        }
        return true;
 }
 
-bool createDir(const bf::path& path) {
-       if (bf::exists(path)) {
+bool exist(const bf::path& path)
+{
+       bs::error_code error;
+       int ret = bf::exists(path, error);
+       if (error) {
+               if ((error.value() != bs::errc::success) && (error.value() != bs::errc::no_such_file_or_directory)) {
+                       _ERR("Failed to check %s exists : %s", path.c_str(), error.message().c_str());
+               }
+       }
+       return ret;
+}
+
+bool createDir(const bf::path& path)
+{
+       if (exist(path)) {
                return true;
        }
        bs::error_code error;
@@ -278,29 +498,30 @@ bool createDir(const bf::path& path) {
        return true;
 }
 
-bool copyDir(const bf::path& path, const bf::path& dst, FSFlag flags, bool skip_symlink) {
+bool copyDir(const bf::path& path1, const bf::path& path2, FSFlag flags)
+{
        try {
                // Check whether the function call is valid
-               if (!bf::exists(path) || !bf::is_directory(path)) {
-                       _ERR("Source directory %s does not exist or is not a directory", path.c_str());
+               if (!exist(path1) || !bf::is_directory(path1)) {
+                       _ERR("Source directory %s does not exist or is not a directory", path1.c_str());
                        return false;
                }
-               if (!bf::exists(dst)) {
+               if (!exist(path2)) {
                        // Create the destination directory
-                       if (!createDir(dst)) {
-                               _ERR("Unable to create destination directory %s", dst.c_str());
+                       if (!createDir(path2)) {
+                               _ERR("Unable to create destination directory %s", path2.c_str());
                                return false;
                        }
                        if (flags & FS_PRESERVE_OWNERSHIP_AND_PERMISSIONS) {
-                               copyOwnershipAndPermissions(path, dst);
+                               copyOwnershipAndPermissions(path1, path2);
                        }
                } else {
                        if (!(flags & (FS_MERGE_SKIP | FS_MERGE_OVERWRITE))) {
-                               _ERR("Destination directory %s already exists", dst.c_str());
+                               _ERR("Destination directory %s already exists", path2.c_str());
                                return false;
                        }
                        if (flags & (FS_MERGE_OVERWRITE | FS_PRESERVE_OWNERSHIP_AND_PERMISSIONS)) {
-                               copyOwnershipAndPermissions(path, dst);
+                               copyOwnershipAndPermissions(path1, path2);
                        }
                }
        } catch (const bf::filesystem_error& error) {
@@ -309,15 +530,12 @@ bool copyDir(const bf::path& path, const bf::path& dst, FSFlag flags, bool skip_
        }
 
        // Iterate through the source directory
-       for (bf::directory_iterator file(path); file != bf::directory_iterator(); ++file) {
+       for (bf::directory_iterator file(path1); file != bf::directory_iterator(); ++file) {
                try {
                        bf::path current(file->path());
-                       bf::path target = dst / current.filename();
+                       bf::path target = path2 / current.filename();
                        if (bf::is_symlink(symlink_status(current))) {
-                               if (skip_symlink) {
-                                       continue;
-                               }
-                               if ((flags & (FS_MERGE_SKIP | FS_MERGE_OVERWRITE)) && bf::exists(target)) {
+                               if ((flags & (FS_MERGE_SKIP | FS_MERGE_OVERWRITE)) && exist(target)) {
                                        continue;
                                }
                                bs::error_code error;
@@ -328,11 +546,11 @@ bool copyDir(const bf::path& path, const bf::path& dst, FSFlag flags, bool skip_
                                }
                        } else if (bf::is_directory(current)) {
                                // Found directory: Recursion
-                               if (!copyDir(current, target, flags, skip_symlink)) {
+                               if (!copyDir(current, target, flags)) {
                                        return false;
                                }
                        } else {
-                               if ((flags & FS_MERGE_SKIP) && bf::exists(target)) {
+                               if ((flags & FS_MERGE_SKIP) && exist(target)) {
                                        continue;
                                }
                                bf::path destination = target;
@@ -362,40 +580,46 @@ bool copyDir(const bf::path& path, const bf::path& dst, FSFlag flags, bool skip_
        return true;
 }
 
-bool copyFile(const bf::path& path, const bf::path& dst) {
+bool copyFile(const bf::path& path1, const bf::path& path2)
+{
        bs::error_code error;
-       bf::copy_file(path, dst, bf::copy_option::overwrite_if_exists, error);
+       if (!exist(path1)) {
+               return false;
+       }
+       bf::copy_file(path1, path2, bf::copy_option::overwrite_if_exists, error);
        if (error) {
-               _ERR("copy file %s due to error [%s]", path.c_str(), error.message().c_str());
+               _ERR("copy file %s due to error [%s]", path1.c_str(), error.message().c_str());
                return false;
        }
        return true;
 }
 
-bool moveFile(const bf::path& path, const bf::path& dst, bool force) {
-       if (!force && bf::exists(dst)) {
+bool moveFile(const bf::path& path1, const bf::path& path2)
+{
+       if (!exist(path1) || exist(path2)) {
                return false;
        }
        bs::error_code error;
-       bf::rename(path, dst, error);
+       bf::rename(path1, path2, error);
        if (error) {
-               _ERR("Cannot move file: %s. Will copy/remove... with error [%s]", path.c_str(), error.message().c_str());
-               bf::copy_file(path, dst, bf::copy_option::overwrite_if_exists, error);
+               _ERR("Cannot move file: %s. Will copy/remove... with error [%s]", path1.c_str(), error.message().c_str());
+               bf::copy_file(path1, path2, bf::copy_option::overwrite_if_exists, error);
                if (error) {
-                       _ERR("Cannot copy file %s due to error [%s]", path.c_str(), error.message().c_str());
+                       _ERR("Cannot copy file %s due to error [%s]", path1.c_str(), error.message().c_str());
                        return false;
                }
-               bf::remove_all(path, error);
+               bf::remove_all(path1, error);
                if (error) {
-                       _ERR("Cannot remove old file when coping: %s with error [%s]", path.c_str(), error.message().c_str());
+                       _ERR("Cannot remove old file when coping: %s with error [%s]", path1.c_str(), error.message().c_str());
                        return false;
                }
        }
        return true;
 }
 
-bool removeFile(const bf::path& path) {
-       if (!bf::exists(path)) {
+bool removeFile(const bf::path& path)
+{
+       if (!exist(path)) {
                return true;
        }
        bs::error_code error;
@@ -407,8 +631,9 @@ bool removeFile(const bf::path& path) {
        return true;
 }
 
-bool removeAll(const bf::path& path) {
-       if (!exists(path)) {
+bool removeAll(const bf::path& path)
+{
+       if (!exist(path)) {
                return true;
        }
        bs::error_code error;
@@ -418,4 +643,61 @@ bool removeAll(const bf::path& path) {
                return false;
        }
        return true;
+}
+
+void setCmdName(const std::string& name)
+{
+       #define PRC_NAME_LENGTH         16
+
+       char processName[PRC_NAME_LENGTH] = {0, };
+
+       if (name.empty())
+               return;
+
+       memset(processName, '\0', PRC_NAME_LENGTH);
+       snprintf(processName, PRC_NAME_LENGTH, "%s", name.c_str());
+       prctl(PR_SET_NAME, processName);
+}
+
+std::string getFileName(const std::string& path)
+{
+       std::string ret(path);
+       size_t index = ret.find_last_of(PATH_SEPARATOR);
+       return index == std::string::npos ? ret : ret.substr(index + 1);
+}
+
+std::string SHA256(const std::string& path)
+{
+       std::string output = "";
+       FILE *file = fopen(path.c_str(), "rb");
+       if (!file) {
+               return output;
+       }
+
+       unsigned char hash[SHA256_DIGEST_LENGTH];
+       SHA256_CTX sha256;
+       SHA256_Init(&sha256);
+       int bytesRead = 0;
+       const int bufSize = 32768;
+       char *buffer = (char*)malloc(bufSize);
+       if (!buffer) {
+               fclose(file);
+               return output;
+       }
+
+       while ((bytesRead = fread(buffer, 1, bufSize, file))) {
+               SHA256_Update(&sha256, buffer, bytesRead);
+       }
+       SHA256_Final(hash, &sha256);
+
+       std::stringstream ss;
+       for (int i = 0; i < SHA256_DIGEST_LENGTH; i++) {
+               ss << std::hex << std::setw(2) << std::setfill('0') << (int)hash[i];
+       }
+       output = ss.str();
+
+       fclose(file);
+       free(buffer);
+
+       return output;
 }
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