[PATCH v3 0/1] MR8479: ntdll: Treat XDG_DATA_DIRS as special env variable

[Mike Kozelkov (＠augenzi)]

This solution was introduced in !7901, but it still open without any review. More info in the original MR. Also I should note that GTK uses XDG_DATA_DIRS and XDG_HOME_DIRS environment variables to locate icon themes and MIME information.

This solution fixes: https://bugs.winehq.org/show_bug.cgi?id=49987 and https://bugs.winehq.org/show_bug.cgi?id=58023

--
  v3: ntdll: Treat XDG_DATA_DIRS as special env variable

https://gitlab.winehq.org/wine/wine/-/merge_requests/8479

[PATCH v3 1/1] ntdll: Treat XDG_DATA_DIRS as special env variable

[Louis Lenders]

From: Louis Lenders

---
 dlls/ntdll/unix/env.c                      | 5 ++++-
 dlls/ntdll/unix/loader.c                   | 7 +++++++
 dlls/ntdll/unix/unix_private.h             | 1 +
 programs/winemenubuilder/winemenubuilder.c | 5 +++--
 4 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/dlls/ntdll/unix/env.c b/dlls/ntdll/unix/env.c
index 9edb69dd519..a132560ef2e 100644
--- a/dlls/ntdll/unix/env.c
+++ b/dlls/ntdll/unix/env.c
@@ -345,6 +345,7 @@ 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=" ));
 }

@@ -363,7 +364,8 @@ 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=" ));
 }

/******************************************************************
@@ -1112,6 +1114,7 @@ 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" );
 }
diff --git a/dlls/ntdll/unix/loader.c b/dlls/ntdll/unix/loader.c
index 4e40e09ecf2..414814e1982 100644
--- a/dlls/ntdll/unix/loader.c
+++ b/dlls/ntdll/unix/loader.c
@@ -165,6 +165,7 @@ 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 */
@@ -443,6 +444,11 @@ static void set_config_dir(void)
     }
 }

+static void set_xdg_dirs(void)
+{
+    xdg_data_dirs = getenv( "XDG_DATA_DIRS" );
+}
+
 static void init_paths(void)
 {
     Dl_info info;
@@ -467,6 +473,7 @@ 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 a735e54d9ff..ac6d87ea8e1 100644
--- a/dlls/ntdll/unix/unix_private.h
+++ b/dlls/ntdll/unix/unix_private.h
@@ -181,6 +181,7 @@ 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 e881408ef9f..1ec97659c14 100644
--- a/programs/winemenubuilder/winemenubuilder.c
+++ b/programs/winemenubuilder/winemenubuilder.c
@@ -1706,11 +1706,12 @@ 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" ));
+    if (_wgetenv( L"WINEXDG_DATA_DIRS" ))
+        dirs = xwcsdup( _wgetenv( L"WINEXDG_DATA_DIRS" ));
     else
         dirs = xwcsdup( L"/usr/local/share/:/usr/share/" );

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