update.c: work around segfault

fixes #29
labwc · Nov 12, 2024 · 77f8e3d · 77f8e3d
1 parent 4f45803
commit 77f8e3d
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diff --git a/environment.c b/environment.c
@@ -86,6 +86,13 @@ environment_get(char *buffer, size_t size, const char *key)
 void
 environment_set(const char *key, const char *value)
 {
+	if (!key || !*key) {
+		return;
+	}
+	if (!value || !*value) {
+		return;
+	}
+
 	/* set cursor for labwc  - should cover 'replace' or 'append' */
 	char xcur[4096] = {0};
 	strcpy(xcur, key);

diff --git a/update.c b/update.c
@@ -20,6 +20,9 @@ spawn_sync(char const *command)
 static const char
 *first_field(const char *s, char delim)
 {
+	if (!s) {
+		return NULL;
+	}
 	char *p = strchr(s, delim);
 	if (p) {
 		*p = '\0';