From 4798cd6d1e90e4e83717ad186430044ea479ac56 Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Sat, 30 Nov 2024 09:27:12 +0300
Subject: [PATCH] filesystem: add new export to get fs_rootdir path

---
 filesystem/VFileSystem009.cpp    |  4 +---
 filesystem/filesystem.c          | 20 ++++++++++++++++++++
 filesystem/filesystem.h          |  3 +++
 filesystem/filesystem_internal.h |  1 +
 4 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/filesystem/VFileSystem009.cpp b/filesystem/VFileSystem009.cpp
index 3b748ad8..c00b882d 100644
--- a/filesystem/VFileSystem009.cpp
+++ b/filesystem/VFileSystem009.cpp
@@ -435,9 +435,7 @@ public:
 
 	bool GetCurrentDirectory( char *p, int size ) override
 	{
-		Q_strncpy( p, fs_rootdir, size );
-
-		return true;
+		return FS_GetRootDirectory( p, size );
 	}
 
 	void PrintOpenedFiles() override
diff --git a/filesystem/filesystem.c b/filesystem/filesystem.c
index 2911ef7d..b79df970 100644
--- a/filesystem/filesystem.c
+++ b/filesystem/filesystem.c
@@ -1905,6 +1905,24 @@ int FS_SetCurrentDirectory( const char *path )
 	return true;
 }
 
+/*
+==================
+FS_GetRootDirectory
+
+Returns writable root directory path
+==================
+*/
+qboolean FS_GetRootDirectory( char *path, size_t size )
+{
+	size_t dirlen = Q_strlen( fs_rootdir );
+
+	if( dirlen >= size ) // check for possible overflow
+		return false;
+
+	Q_strncpy( path, fs_rootdir, size );
+	return true;
+}
+
 /*
 ====================
 FS_FindFile
@@ -3139,6 +3157,8 @@ const fs_api_t g_api =
 	FS_FindFileInArchive,
 	FS_OpenFileFromArchive,
 	FS_LoadFileFromArchive,
+
+	FS_GetRootDirectory,
 };
 
 int EXPORT GetFSAPI( int version, fs_api_t *api, fs_globals_t **globals, fs_interface_t *engfuncs );
diff --git a/filesystem/filesystem.h b/filesystem/filesystem.h
index 9614c288..874d7bcb 100644
--- a/filesystem/filesystem.h
+++ b/filesystem/filesystem.h
@@ -223,6 +223,9 @@ typedef struct fs_api_t
 	// NOTE: for speed reasons, path is case-sensitive here!
 	// Use FindFileInArchive to retrieve real path from caseinsensitive FS emulation!
 	byte *(*LoadFileFromArchive)( searchpath_t *sp, const char *path, int pack_ind, fs_offset_t *filesizeptr, const qboolean sys_malloc );
+
+	// gets current root directory, set by InitStdio
+	qboolean (*GetRootDirectory)( char *path, size_t size );
 } fs_api_t;
 
 typedef struct fs_interface_t
diff --git a/filesystem/filesystem_internal.h b/filesystem/filesystem_internal.h
index 4a8d5132..68080435 100644
--- a/filesystem/filesystem_internal.h
+++ b/filesystem/filesystem_internal.h
@@ -162,6 +162,7 @@ void FS_AddGameHierarchy( const char *dir, uint flags );
 search_t *FS_Search( const char *pattern, int caseinsensitive, int gamedironly )
 	MALLOC_LIKE( _Mem_Free, 1 ) WARN_UNUSED_RESULT;
 int FS_SetCurrentDirectory( const char *path );
+qboolean FS_GetRootDirectory( char *path, size_t size );
 void FS_Path_f( void );
 
 // gameinfo utils