git subrepo clone https://github.com/Atmosphere-NX/Atmosphere-libs libraries

subrepo:
  subdir:   "libraries"
  merged:   "07af583b"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "07af583b"
git-subrepo:
  version:  "0.4.0"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "5d6aba9"

libraries/libstratosphere/source/cfg/cfg_flags.cpp

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2018-2019 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stratosphere.hpp>
+
+namespace ams::cfg {
+
+    namespace {
+
+        /* Helper. */
+        bool HasFlagFile(const char *flag_path) {
+            /* All flags are not present until the SD card is. */
+            if (!IsSdCardInitialized()) {
+                return false;
+            }
+
+            /* Mount the SD card. */
+            FsFileSystem sd_fs = {};
+            if (R_FAILED(fsOpenSdCardFileSystem(&sd_fs))) {
+                return false;
+            }
+            ON_SCOPE_EXIT { serviceClose(&sd_fs.s); };
+
+            /* Open the file. */
+            FsFile flag_file;
+            if (R_FAILED(fsFsOpenFile(&sd_fs, flag_path, FsOpenMode_Read, &flag_file))) {
+                return false;
+            }
+            fsFileClose(&flag_file);
+
+            return true;
+        }
+
+    }
+
+    /* Flag utilities. */
+    bool HasFlag(const sm::MitmProcessInfo &process_info, const char *flag) {
+        return HasContentSpecificFlag(process_info.program_id, flag) || (process_info.override_status.IsHbl() && HasHblFlag(flag));
+    }
+
+    bool HasContentSpecificFlag(ncm::ProgramId program_id, const char *flag) {
+        char content_flag[FS_MAX_PATH];
+        std::snprintf(content_flag, sizeof(content_flag) - 1, "/atmosphere/contents/%016lx/flags/%s.flag", static_cast<u64>(program_id), flag);
+        return HasFlagFile(content_flag);
+    }
+
+    bool HasGlobalFlag(const char *flag) {
+        char global_flag[FS_MAX_PATH];
+        std::snprintf(global_flag, sizeof(global_flag) - 1, "/atmosphere/flags/%s.flag", flag);
+        return HasFlagFile(global_flag);
+    }
+
+    bool HasHblFlag(const char *flag) {
+        char hbl_flag[0x100];
+        std::snprintf(hbl_flag, sizeof(hbl_flag) - 1, "hbl_%s", flag);
+        return HasGlobalFlag(hbl_flag);
+    }
+
+}