Add socket system call constants

README.md

@@ -1,5 +1,9 @@
 # Discord RPC Bridge for Wine
 
+![GitHub](https://img.shields.io/github/license/EnderIce2/rpc-bridge)
+![GitHub All Releases](https://img.shields.io/github/downloads/EnderIce2/rpc-bridge/total)
+![GitHub release (latest by date)](https://img.shields.io/github/v/release/EnderIce2/rpc-bridge)
+
 Simple bridge that allows you to use Discord Rich Presence with Wine games/software.
 
 Works by running a small program in the background that creates a [named pipe](https://learn.microsoft.com/en-us/windows/win32/ipc/named-pipes) `\\.\pipe\discord-ipc-0` inside the prefix and forwards all data to the pipe `/run/user/1000/discord-ipc-0`.
@@ -13,11 +17,11 @@ This bridge takes advantage of the Windows service implementation in Wine, elimi
 - [Discord RPC Bridge for Wine](#discord-rpc-bridge-for-wine)
 	- [Table of Contents](#table-of-contents)
 	- [Installation \& Usage](#installation--usage)
-			- [Installing inside a prefix](#installing-inside-a-prefix)
-				- [Wine (~/.wine)](#wine-wine)
-				- [Lutris](#lutris)
-				- [Steam](#steam)
-			- [If you use Flatpak](#if-you-use-flatpak)
+		- [Installing inside a prefix](#installing-inside-a-prefix)
+			- [Wine (~/.wine)](#wine-wine)
+			- [Lutris](#lutris)
+			- [Steam](#steam)
+		- [If you use Flatpak](#if-you-use-flatpak)
 	- [Run without installing the service](#run-without-installing-the-service)
 	- [Compiling from source](#compiling-from-source)
 	- [Command line arguments](#command-line-arguments)
@@ -76,7 +80,7 @@ If you prefer not to use the service for any reason, please refer to the [Run wi
 
 ## Run without installing the service
 
-If you prefer not to use the service, you can manually run `bridge.exe`` within the Wine prefix.
+If you prefer not to use the service, you can manually run `bridge.exe` within the Wine prefix.
 This method is compatible with both Wine and Lutris.
 
 In Lutris, you can achieve this by adding the path to `bridge.exe` in the `Executable` field under `Game options`. In `Arguments`  field, be sure to include the _Windows_ path to the game's executable.

bridge.c

@@ -10,6 +10,9 @@
 #define __NR_close 6
 #define __NR_socketcall 102
 
+#define SYS_SOCKET 1
+#define SYS_CONNECT 3
+
 #define O_RDONLY 00
 
 #define likely(expr) (__builtin_expect(!!(expr), 1))
@@ -136,6 +139,7 @@ void ConnectToSocket(int fd)
 
 	print("XDG_RUNTIME_DIR: %s\n", runtime);
 
+	/* TODO: check for multiple discord instances and create a pipe for each */
 	const char *discordUnixPipes[] = {
 		"/discord-ipc-0",
 		"/snap.discord/discord-ipc-0",
@@ -161,7 +165,7 @@ void ConnectToSocket(int fd)
 			(unsigned long)&socketAddr,
 			sizeof(socketAddr)};
 
-		sockRet = sys_socketcall(3, socketArgs);
+		sockRet = sys_socketcall(SYS_CONNECT, socketArgs);
 
 		free(pipePath);
 		if (sockRet >= 0)
@@ -372,7 +376,7 @@ NewConnection:
 		(unsigned long)SOCK_STREAM,
 		0};
 
-	int fd = sys_socketcall(1, socketArgs);
+	int fd = sys_socketcall(SYS_SOCKET, socketArgs);
 
 	print("Socket %d created\n", fd);
 

main.c

@@ -52,6 +52,23 @@ void DetectWine()
 				   GetErrorMessage(), MB_OK | MB_ICONINFORMATION);
 		ExitProcess(1);
 	}
+
+	static void(CDECL * wine_get_host_version)(const char **sysname, const char **release);
+	wine_get_host_version = (void *)GetProcAddress(hNTdll, "wine_get_host_version");
+
+	assert(wine_get_host_version);
+	const char *__sysname;
+	const char *__release;
+	wine_get_host_version(&__sysname, &__release);
+	if (strcmp(__sysname, "Linux") != 0)
+	{
+		int result = MessageBox(NULL, "This program is designed for Linux only!\nDo you want to proceed?",
+								NULL, MB_YESNO | MB_ICONQUESTION);
+		if (result == IDYES)
+			return;
+		else if (result == IDNO)
+			ExitProcess(1);
+	}
 }
 
 void print(char const *fmt, ...)