From 253e7f9eaa3f3279f2a8639949f74acf0797de33 Mon Sep 17 00:00:00 2001
From: default <nobody@localhost>
Date: Fri, 13 Oct 2023 06:33:12 +0200
Subject: Don't allow creating users which user name strings only differ in
 case.

---
 snac.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'snac.c')

diff --git a/snac.c b/snac.c
index 683ff40..1ea61ff 100644
--- a/snac.c
+++ b/snac.c
@@ -79,6 +79,9 @@ double ftime(void)
 int validate_uid(const char *uid)
 /* returns if uid is a valid identifier */
 {
+    if (!uid || *uid == '\0')
+        return 0;
+
     while (*uid) {
         if (!(isalnum(*uid) || *uid == '_'))
             return 0;
-- 
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