From c328a74f71b03b76a8c8f61bf024e8e3ce5c6c30 Mon Sep 17 00:00:00 2001
From: plutooo <plutooo@users.noreply.github.com>
Date: Sun, 9 Dec 2018 17:06:47 +0100
Subject: [PATCH] Add fsIsExFatSupported()

---
 nx/include/switch/services/fs.h |  2 ++
 nx/source/services/fs.c         | 43 +++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/nx/include/switch/services/fs.h b/nx/include/switch/services/fs.h
index 8d143ff9..b114941f 100644
--- a/nx/include/switch/services/fs.h
+++ b/nx/include/switch/services/fs.h
@@ -166,6 +166,8 @@ Service* fsGetServiceSession(void);
 Result fsOpenBisStorage(FsStorage* out, u32 PartitionId);
 Result fsOpenBisFileSystem(FsFileSystem* out, u32 PartitionId, const char* string);
 
+Result fsIsExFatSupported(bool* out);
+
 /// Do not call this directly, see fs_dev.h.
 Result fsMountSdcard(FsFileSystem* out);
 
diff --git a/nx/source/services/fs.c b/nx/source/services/fs.c
index 8619c4f9..909c8e80 100644
--- a/nx/source/services/fs.c
+++ b/nx/source/services/fs.c
@@ -425,6 +425,49 @@ Result fsOpenSdCardDetectionEventNotifier(FsEventNotifier* out) {
     return rc;
 }
 
+Result fsIsExFatSupported(bool* out)
+{
+    if (!kernelAbove200()) {
+      *out = false;
+      return 0;
+    }
+
+    IpcCommand c;
+    ipcInitialize(&c);
+
+    struct {
+        u64 magic;
+        u64 cmd_id;
+    } *raw;
+
+    raw = serviceIpcPrepareHeader(&g_fsSrv, &c, sizeof(*raw));
+
+    raw->magic = SFCI_MAGIC;
+    raw->cmd_id = 27;
+
+    Result rc = serviceIpcDispatch(&g_fsSrv);
+
+    if (R_SUCCEEDED(rc)) {
+        IpcParsedCommand r;
+        struct {
+            u64 magic;
+            u64 result;
+            u8  exfat;
+        } *resp;
+
+        serviceIpcParse(&g_fsSrv, &r, sizeof(*resp));
+        resp = r.Raw;
+
+        rc = resp->result;
+
+        if (R_SUCCEEDED(rc)) {
+            *out = resp->exfat;
+        }
+    }
+
+    return rc;
+}
+
 // Wrapper(s) for fsMountSaveData.
 Result fsMount_SaveData(FsFileSystem* out, u64 titleID, u128 userID) {
     FsSave save;