git subrepo clone https://github.com/Atmosphere-NX/libstratosphere stratosphere/libstratosphere

subrepo:
  subdir:   "stratosphere/libstratosphere"
  merged:   "0c5dab80"
upstream:
  origin:   "https://github.com/Atmosphere-NX/libstratosphere"
  branch:   "master"
  commit:   "0c5dab80"
git-subrepo:
  version:  "0.4.0"
  origin:   "https://github.com/ingydotnet/git-subrepo"
  commit:   "5d6aba9"

stratosphere/libstratosphere/source/ldr/ldr_ams.c

@@ -0,0 +1,68 @@
+/*
+ * 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 <switch.h>
+#include "ldr_ams.h"
+
+static Result _ldrAtmosphereHasLaunchedTitle(Service *srv, bool *out, u64 tid) {
+    IpcCommand c;
+    ipcInitialize(&c);
+
+    struct {
+        u64 magic;
+        u64 cmd_id;
+        u64 title_id;
+    } *raw;
+
+    raw = serviceIpcPrepareHeader(srv, &c, sizeof(*raw));
+    raw->magic = SFCI_MAGIC;
+    raw->cmd_id = 65000;
+    raw->title_id = tid;
+
+    Result rc = serviceIpcDispatch(srv);
+
+    if (R_SUCCEEDED(rc)) {
+        IpcParsedCommand r;
+        struct {
+            u64 magic;
+            u64 result;
+            u8 has_launched_title;
+        } *resp;
+
+        serviceIpcParse(srv, &r, sizeof(*resp));
+        resp = r.Raw;
+
+        rc = resp->result;
+
+        if (R_SUCCEEDED(rc)) {
+            *out = resp->has_launched_title != 0;
+        } else {
+            rc = 0x666;
+        }
+    } else {
+        rc = 0x555;
+    }
+
+    return rc;
+}
+
+Result ldrDmntAtmosphereHasLaunchedTitle(bool *out, u64 tid) {
+    return _ldrAtmosphereHasLaunchedTitle(ldrDmntGetServiceSession(), out, tid);
+}
+
+Result ldrPmAtmosphereHasLaunchedTitle(bool *out, u64 tid) {
+    return _ldrAtmosphereHasLaunchedTitle(ldrPmGetServiceSession(), out, tid);
+}