From 86577c2c722b6695497fed18fd27299d6d9331b7 Mon Sep 17 00:00:00 2001
From: HookedBehemoth <Luisscheurenbrand@gmail.com>
Date: Fri, 5 Jun 2020 18:19:52 +0200
Subject: [PATCH] add romfs wrapper for program mounting

---
 nx/include/switch/runtime/devices/romfs_dev.h |  8 ++++++++
 nx/source/runtime/devices/romfs_dev.c         | 10 ++++++++++
 2 files changed, 18 insertions(+)

diff --git a/nx/include/switch/runtime/devices/romfs_dev.h b/nx/include/switch/runtime/devices/romfs_dev.h
index b33e2418..7582a03b 100644
--- a/nx/include/switch/runtime/devices/romfs_dev.h
+++ b/nx/include/switch/runtime/devices/romfs_dev.h
@@ -82,6 +82,14 @@ Result romfsMountFromStorage(FsStorage storage, u64 offset, const char *name);
  */
 Result romfsMountFromCurrentProcess(const char *name);
 
+/**
+ * @brief Mounts RomFS of a running program.
+ * @note Permission needs to be set in the NPDM.
+ * @param program_id ProgramId to mount.
+ * @param name Device mount name.
+ */
+Result romfsMountProgram(u64 program_id, const char *name);
+
 /**
  * @brief Mounts RomFS from a file path in a mounted fsdev device.
  * @param path File path.
diff --git a/nx/source/runtime/devices/romfs_dev.c b/nx/source/runtime/devices/romfs_dev.c
index 0dd50374..34d23978 100644
--- a/nx/source/runtime/devices/romfs_dev.c
+++ b/nx/source/runtime/devices/romfs_dev.c
@@ -342,6 +342,16 @@ Result romfsMountFromCurrentProcess(const char *name) {
     return romfsMountFromStorage(storage, 0, name);
 }
 
+Result romfsMountProgram(u64 program_id, const char *name) {
+    FsStorage storage;
+
+    Result rc = fsOpenDataStorageByProgramId(&storage, program_id);
+    if (R_FAILED(rc))
+        return rc;
+
+    return romfsMountFromStorage(storage, 0, name);
+}
+
 Result romfsMountFromFsdev(const char *path, u64 offset, const char *name)
 {
     FsFileSystem *tmpfs = NULL;