From: Roy Marples <roy@marples.name>
Date: Tue, 7 Feb 2023 17:02:29 +0000 (+0000)
Subject: options: Fix prior
X-Git-Tag: v10.0.0~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=11975ad8ddf856602c9923ad296c3fd566218adc;p=thirdparty%2Fdhcpcd.git

options: Fix prior

For #184.
---

diff --git a/src/if-options.c b/src/if-options.c
index fdb50706..1ef9cc99 100644
--- a/src/if-options.c
+++ b/src/if-options.c
@@ -190,9 +190,13 @@ add_environ(char ***array, const char *value, int uniq)
 		return NULL;
 	}
 	*p++ = '\0';
+	l = strlen(match);
 
 	while (list && list[i]) {
-		if (match && strcmp(list[i], match) == 0) {
+		/* We know that it must contain '=' due to the above test */
+		size_t listl = (size_t)(strchr(list[i], '=') - list[i]);
+
+		if (l == listl && strncmp(list[i], match, l) == 0) {
 			if (uniq) {
 				n = strdup(value);
 				if (n == NULL) {