[PATCH 0/1] MR8721: winebus: Read options from WINEBUSCONFIG environment variable.

[Rémi Bernon (＠rbernon)]

This allows options from https://gitlab.winehq.org/wine/wine/-/merge_requests/8686 to be set directly in an environment variable, making it easier for users to configure the hidraw preference system-wide, to match their devices across all prefixes.

[PATCH 1/1] winebus: Read options from WINEBUSCONFIG environment variable.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/winebus.sys/main.c      | 29 +++++++++++++++++++++++++++++
 programs/services/services.c | 22 +++++++++++++++-------
 tools/wine/wine.man.in       | 13 +++++++++++++
 3 files changed, 57 insertions(+), 7 deletions(-)

diff --git a/dlls/winebus.sys/main.c b/dlls/winebus.sys/main.c
index a9f634a8e42..8813ec61fef 100644
--- a/dlls/winebus.sys/main.c
+++ b/dlls/winebus.sys/main.c
@@ -1083,6 +1083,8 @@ static void load_device_options(void)

static void bus_options_init(void)
 {
+    char *env;
+
     options.disable_sdl = !check_bus_option(L"Enable SDL", 1);
     if (options.disable_sdl) TRACE("SDL devices disabled in registry\n");
     options.disable_hidraw = check_bus_option(L"DisableHidraw", 0);
@@ -1102,6 +1104,33 @@ static void bus_options_init(void)
     }

load_device_options();
+
+    if ((env = getenv("WINEBUSCONFIG")) && (env = strdup(env)))
+    {
+        struct device_options *device;
+        UINT vid, pid;
+        int ret;
+
+        TRACE("Parsing WINEBUSCONFIG %s\n", debugstr_a(env));
+
+        for (const char *next, *opt = strtok(env, ","); opt; opt = strtok(NULL, ","))
+        {
+            if ((ret = sscanf(opt, "%04x/%04x=", &vid, &pid)) < 1) continue;
+            if (!(device = add_device_options(vid, ret == 1 ? -1 : pid))) break;
+
+            for (opt = strchr(opt + 1, '='); opt; opt = next)
+            {
+                if (!strncmp(opt + 1, "hidraw", 6)) device->hidraw = 1;
+                else if (!strncmp(opt + 1, "nohidraw", 8)) device->hidraw = 0;
+
+                if (!(next = strchr(opt + 1, '/'))) break;
+            }
+
+            if (device->hidraw != -1) TRACE("- %04x/%04x: %sabling hidraw\n", device->vid, device->pid, device->hidraw ? "en" : "dis");
+        }
+
+        free(env);
+    }
 }

static void bus_options_cleanup(void)
diff --git a/programs/services/services.c b/programs/services/services.c
index dff3cd60040..4131106d43d 100644
--- a/programs/services/services.c
+++ b/programs/services/services.c
@@ -1030,15 +1030,23 @@ found:

if (!environment && OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY | TOKEN_DUPLICATE, &token))
     {
-        WCHAR val[16];
-        CreateEnvironmentBlock(&environment, token, FALSE);
-        if (GetEnvironmentVariableW( L"WINEBOOTSTRAPMODE", val, ARRAY_SIZE(val) ))
+        static const WCHAR *preserve[] =
         {
-            UNICODE_STRING name = RTL_CONSTANT_STRING(L"WINEBOOTSTRAPMODE");
-            UNICODE_STRING value;
+            L"WINEBOOTSTRAPMODE",
+            L"WINEBUSCONFIG",
+        };
+        WCHAR buffer[1024];

-            RtlInitUnicodeString( &value, val );
-            RtlSetEnvironmentVariable( (WCHAR **)&environment, &name, &value );
+        CreateEnvironmentBlock(&environment, token, FALSE);
+        for (size_t i = 0; i < ARRAY_SIZE(preserve); i++)
+        {
+            if (GetEnvironmentVariableW( preserve[i], buffer, ARRAY_SIZE(buffer) ))
+            {
+                UNICODE_STRING value, name;
+                RtlInitUnicodeString( &name, preserve[i] );
+                RtlInitUnicodeString( &value, buffer );
+                RtlSetEnvironmentVariable( (WCHAR **)&environment, &name, &value );
+            }
         }
         CloseHandle(token);
     }
diff --git a/tools/wine/wine.man.in b/tools/wine/wine.man.in
index ddc84e8345b..02bc1292a5c 100644
--- a/tools/wine/wine.man.in
+++ b/tools/wine/wine.man.in
@@ -234,6 +234,19 @@ WINE_D3D_CONFIG="renderer=vulkan;VideoPciVendorID=0xc0de"
 If an individual setting is specified in both
 the environment variable and the registry, the former takes precedence.
 .RE
+.B WINEBUSCONFIG
+Specifies WineBus configuration options. It can be used instead of
+modifying the
+.B HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Services\\WineBus\\Devices
+registry key. The value is a comma-separated list of key-value pairs.
+.RS
+For example:
+.TP
+WINEBUSCONFIG="3344=nohidraw,231d/0128=hidraw,044f/b10a=nohidraw"
+.PP
+If an individual setting is specified in both
+the environment variable and the registry, the former takes precedence.
+.RE
 .TP
 .B DISPLAY
 Specifies the X11 display to use.