From 7e685eaa4c8a2483a9d0152f47fdb1b70d6ccfec Mon Sep 17 00:00:00 2001
From: Reginald Kennedy <rk@rejii.com>
Date: Wed, 4 May 2016 22:10:14 +0800
Subject: [PATCH] Prepend SWM_LIB to LD_PRELOAD instead of clobbering.

closes #124
---
 spectrwm.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/spectrwm.c b/spectrwm.c
index 37b0d2e..e566741 100644
--- a/spectrwm.c
+++ b/spectrwm.c
@@ -3712,7 +3712,16 @@ spawn(int ws_idx, union arg *args, bool close_fd)
 
 	close(xcb_get_file_descriptor(conn));
 
-	setenv("LD_PRELOAD", SWM_LIB, 1);
+	if ((ret = getenv("LD_PRELOAD"))) {
+		if (asprintf(&ret, "%s:%s", SWM_LIB, ret) == -1) {
+			warn("spawn: asprintf LD_PRELOAD");
+			_exit(1);
+		}
+		setenv("LD_PRELOAD", ret, 1);
+		free(ret);
+	} else {
+		setenv("LD_PRELOAD", SWM_LIB, 1);
+	}
 
 	if (asprintf(&ret, "%d", ws_idx) == -1) {
 		warn("spawn: asprintf SWM_WS");
-- 
2.39.2