From 75dd467dc5f85b66c00a6e6bc8fe177395a0a074 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Wed, 21 Sep 2022 15:11:10 +0200
Subject: Update with changes from source (commit bcb1d791) - cont'd.

---
 libdecor/src/libdecor.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'libdecor/src/libdecor.c')

diff --git a/libdecor/src/libdecor.c b/libdecor/src/libdecor.c
index 9bd418fe2..7d48d1427 100644
--- a/libdecor/src/libdecor.c
+++ b/libdecor/src/libdecor.c
@@ -1,6 +1,7 @@
 /*
  * Copyright © 2017-2018 Red Hat Inc.
  * Copyright © 2018 Jonas Ådahl
+ * Copyright © 2019 Christian Rauch
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -1387,6 +1388,24 @@ calculate_priority(const struct libdecor_plugin_description *plugin_description)
 	return -1;
 }
 
+static bool
+check_symbol_conflicts(const struct libdecor_plugin_description *plugin_description)
+{
+	char * const *symbol;
+
+	symbol = plugin_description->conflicting_symbols;
+	while (*symbol) {
+		dlerror();
+		dlsym (RTLD_DEFAULT, *symbol);
+		if (!dlerror())
+			return false;
+
+		symbol++;
+	}
+
+	return true;
+}
+
 static struct plugin_loader *
 load_plugin_loader(struct libdecor *context,
 		   const char *path,
@@ -1438,6 +1457,11 @@ load_plugin_loader(struct libdecor *context,
 		return NULL;
 	}
 
+	if (!check_symbol_conflicts(plugin_description)) {
+		dlclose(lib);
+		return NULL;
+	}
+
 	priority = calculate_priority(plugin_description);
 	if (priority == -1) {
 		fprintf(stderr,
-- 
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