From 063f9289f1df4bdec05401519c1a69d4739639e9 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Wed, 16 Feb 2011 04:49:07 -0800
Subject: [PATCH] Fixed bug #1121 (More than one device through
 SDL_JOYSTICK_DEVICE)

 Chusslove Illich      2011-02-13 04:30:28 PST

Currently SDL_JOYSTICK_DEVICE environment variable can be used to add
exactly one topmost device. I think it would be nice if one could also set
several devices (e.g. a stick and a throttle) in this way, as a colon-
separated list. The attached patch implements this
---
 src/joystick/linux/SDL_sysjoystick.c | 32 ++++++++++++++++++----------
 1 file changed, 21 insertions(+), 11 deletions(-)

diff --git a/src/joystick/linux/SDL_sysjoystick.c b/src/joystick/linux/SDL_sysjoystick.c
index e9a25ee61..f6421ba20 100644
--- a/src/joystick/linux/SDL_sysjoystick.c
+++ b/src/joystick/linux/SDL_sysjoystick.c
@@ -417,21 +417,31 @@ int SDL_SYS_JoystickInit(void)
 
 	numjoysticks = 0;
 
-	/* First see if the user specified a joystick to use */
+	/* First see if the user specified one or more joysticks to use */
 	if ( SDL_getenv("SDL_JOYSTICK_DEVICE") != NULL ) {
-		SDL_strlcpy(path, SDL_getenv("SDL_JOYSTICK_DEVICE"), sizeof(path));
-		if ( stat(path, &sb) == 0 ) {
-			fd = open(path, O_RDONLY, 0);
-			if ( fd >= 0 ) {
-				/* Assume the user knows what they're doing. */
-				SDL_joylist[numjoysticks].fname = SDL_strdup(path);
-				if ( SDL_joylist[numjoysticks].fname ) {
-					dev_nums[numjoysticks] = sb.st_rdev;
-					++numjoysticks;
+		char *envcopy, *envpath, *delim;
+		envcopy = SDL_strdup(SDL_getenv("SDL_JOYSTICK_DEVICE"));
+		envpath = envcopy;
+		while ( envpath != NULL ) {
+			delim = SDL_strchr(envpath, ':');
+			if ( delim != NULL ) {
+				*delim++ = '\0';
+			}
+			if ( stat(envpath, &sb) == 0 ) {
+				fd = open(envpath, O_RDONLY, 0);
+				if ( fd >= 0 ) {
+					/* Assume the user knows what they're doing. */
+					SDL_joylist[numjoysticks].fname = SDL_strdup(envpath);
+					if ( SDL_joylist[numjoysticks].fname ) {
+						dev_nums[numjoysticks] = sb.st_rdev;
+						++numjoysticks;
+					}
+					close(fd);
 				}
-				close(fd);
 			}
+			envpath = delim;
 		}
+		SDL_free(envcopy);
 	}
 
 	for ( i=0; i<SDL_arraysize(joydev_pattern); ++i ) {