[PATCH 0/1] MR7901: ntdll: Treat XDG_DATA_DIRS as special env variable.

[Louis Lenders (＠xe)]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49987

GTK apps seem to use this env var to find path to schemas, like
Meld: https://download.gnome.org/binaries/win32/meld/3.22/Meld-3.22.2-mingw.msi
which doesn't start at all without this patch.
More info in https://bugs.winehq.org/show_bug.cgi?id=49987.

v2: add WINEXDG_DATA_DIRS and use that in winemenubuilder.

[PATCH 1/1] ntdll: Treat XDG_DATA_DIRS as special env variable.

[Louis Lenders]

From: Louis Lenders

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49987

GTK apps seem to use this env var to find path to schemas, like
Meld: https://download.gnome.org/binaries/win32/meld/3.22/Meld-3.22.2-mingw.msi
which doesn't start at all without this patch.
More info in https://bugs.winehq.org/show_bug.cgi?id=49987.

v2: add WINEXDG_DATA_DIRS and use that in winemenubuilder.
---
 dlls/ntdll/unix/env.c                      | 6 ++++--
 dlls/ntdll/unix/loader.c                   | 9 +++++++++
 dlls/ntdll/unix/unix_private.h             | 1 +
 programs/winemenubuilder/winemenubuilder.c | 5 +----
 4 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/dlls/ntdll/unix/env.c b/dlls/ntdll/unix/env.c
index 7193cceb87e..9c7742e572b 100644
--- a/dlls/ntdll/unix/env.c
+++ b/dlls/ntdll/unix/env.c
@@ -346,6 +346,7 @@ static BOOL is_special_env_var( const char *var )
             STARTS_WITH( var, "TMP=" ) ||
             STARTS_WITH( var, "QT_" ) ||
             STARTS_WITH( var, "VK_" ) ||
+            STARTS_WITH( var, "XDG_DATA_DIRS=" ) ||
             STARTS_WITH( var, "XDG_SESSION_TYPE=" ));
 }

@@ -364,7 +365,8 @@ static BOOL is_dynamic_env_var( const char *var )
             STARTS_WITH( var, "WINEUSERNAME=" ) ||
             STARTS_WITH( var, "WINEPRELOADRESERVE=" ) ||
             STARTS_WITH( var, "WINELOADERNOEXEC=" ) ||
-            STARTS_WITH( var, "WINESERVERSOCKET=" ));
+            STARTS_WITH( var, "WINESERVERSOCKET=" ) ||
+            STARTS_WITH( var, "WINEXDG_DATA_DIRS=" ));
 }

/******************************************************************
@@ -1110,11 +1112,11 @@ static void add_dynamic_environment( WCHAR **env, SIZE_T *pos, SIZE_T *size )
     }
     else append_envW( env, pos, size, "WINEUNIXCP", NULL );
     append_envA( env, pos, size, "WINEUSERLOCALE", user_locale );
+    append_envA( env, pos, size, "WINEXDG_DATA_DIRS", xdg_data_dirs );
     append_envA( env, pos, size, "SystemDrive", "C:" );
     append_envA( env, pos, size, "SystemRoot", "C:\windows" );
 }

-
 static WCHAR *expand_value( WCHAR *env, SIZE_T size, const WCHAR *src, SIZE_T src_len )
 {
     SIZE_T len, retlen = src_len + 1, count = 0;
diff --git a/dlls/ntdll/unix/loader.c b/dlls/ntdll/unix/loader.c
index ecbcd439ee7..81f6807e229 100644
--- a/dlls/ntdll/unix/loader.c
+++ b/dlls/ntdll/unix/loader.c
@@ -156,6 +156,8 @@ const char *wineloader = NULL;
 const char **dll_paths = NULL;
 const char **system_dll_paths = NULL;
 const char *user_name = NULL;
+const char *xdg_data_dirs = NULL;
+
 SECTION_IMAGE_INFORMATION main_image_info = { NULL };

/* die on a fatal error; use only during initialization */
@@ -434,6 +436,12 @@ static void set_config_dir(void)
     }
 }

+static void set_xdg_dirs(void)
+{
+    xdg_data_dirs = getenv( "XDG_DATA_DIRS" );
+    if (!xdg_data_dirs) xdg_data_dirs = strdup( "/usr/local/share/:/usr/share/" );
+}
+
 static void init_paths(void)
 {
     Dl_info info;
@@ -458,6 +466,7 @@ static void init_paths(void)
     set_system_dll_path();
     set_home_dir();
     set_config_dir();
+    set_xdg_dirs();
 }

diff --git a/dlls/ntdll/unix/unix_private.h b/dlls/ntdll/unix/unix_private.h
index 2e80c8bd02b..030198ef57d 100644
--- a/dlls/ntdll/unix/unix_private.h
+++ b/dlls/ntdll/unix/unix_private.h
@@ -164,6 +164,7 @@ extern const char *build_dir;
 extern const char *config_dir;
 extern const char *wineloader;
 extern const char *user_name;
+extern const char *xdg_data_dirs;
 extern const char **dll_paths;
 extern const char **system_dll_paths;
 extern pthread_key_t teb_key;
diff --git a/programs/winemenubuilder/winemenubuilder.c b/programs/winemenubuilder/winemenubuilder.c
index f3ed125cccc..6b0f37e7128 100644
--- a/programs/winemenubuilder/winemenubuilder.c
+++ b/programs/winemenubuilder/winemenubuilder.c
@@ -1721,10 +1721,7 @@ static BOOL build_native_mime_types(struct list *mime_types)
     WCHAR *dirs, *dir, *dos_name, *ctx, *p;
     BOOL ret;

-    if (_wgetenv( L"XDG_DATA_DIRS" ))
-        dirs = xwcsdup( _wgetenv( L"XDG_DATA_DIRS" ));
-    else
-        dirs = xwcsdup( L"/usr/local/share/:/usr/share/" );
+    dirs = xwcsdup( _wgetenv( L"WINEXDG_DATA_DIRS" ));

ret = add_mimes(xdg_data_dir, mime_types);
     if (ret)

[Mike Kozelkov (＠augenzi)]

@julliard please take a look