From 7c7cc59889883fa0c19daee122373271670e3b26 Mon Sep 17 00:00:00 2001
From: Michael Skec <mike@skec.site>
Date: Thu, 9 Nov 2023 15:04:19 +1100
Subject: [PATCH] Linux: Fix memory leak when inotify init failed

This introduces regex_compiled boolean to track whether the regex is
compiled successfully.

Closes #2229

(cherry picked from commit c992226a9c63f80e157d6bd9bf2372acd2a1c795)
---
 src/linux_joystick.c | 7 ++++++-
 src/linux_joystick.h | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/linux_joystick.c b/src/linux_joystick.c
index 5d8c8d04..6940cb38 100644
--- a/src/linux_joystick.c
+++ b/src/linux_joystick.c
@@ -283,7 +283,9 @@ GLFWbool _glfwInitJoysticksLinux(void)
 
     // Continue without device connection notifications if inotify fails
 
-    if (regcomp(&_glfw.linjs.regex, "^event[0-9]\\+$", 0) != 0)
+    _glfw.linjs.regex_compiled = regcomp(&_glfw.linjs.regex,
+                                         "^event[0-9]\\+$", 0) == 0;
+    if (!_glfw.linjs.regex_compiled)
     {
         _glfwInputError(GLFW_PLATFORM_ERROR, "Linux: Failed to compile regex");
         return GLFW_FALSE;
@@ -342,6 +344,9 @@ void _glfwTerminateJoysticksLinux(void)
 
         close(_glfw.linjs.inotify);
     }
+
+    if (_glfw.linjs.regex_compiled)
+        regfree(&_glfw.linjs.regex);
 }
 
 void _glfwDetectJoystickConnectionLinux(void)
diff --git a/src/linux_joystick.h b/src/linux_joystick.h
index 25a2a2ee..e5e6f5dc 100644
--- a/src/linux_joystick.h
+++ b/src/linux_joystick.h
@@ -53,6 +53,7 @@ typedef struct _GLFWlibraryLinux
     int                     inotify;
     int                     watch;
     regex_t                 regex;
+    GLFWbool                regex_compiled;
     GLFWbool                dropped;
 } _GLFWlibraryLinux;