From 2770046cd8c24eae69625f7cbab0b6995008bbf7 Mon Sep 17 00:00:00 2001
From: Christian Göttsche <cgzones@googlemail.com>
Date: Mon, 7 Aug 2023 12:46:15 +0200
Subject: conf: cast to unsigned char for character handling function

Character handling functions, like isspace(3), expect a value
representable as unsigned char or equal to EOF.  Otherwise the behavior
is undefined.

See https://wiki.sei.cmu.edu/confluence/display/c/STR37-C.+Arguments+to+character-handling+functions+must+be+representable+as+an+unsigned+char
---
 conf/pam_conv1/pam_conv_y.y | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'conf')

diff --git a/conf/pam_conv1/pam_conv_y.y b/conf/pam_conv1/pam_conv_y.y
index 66d80440..67409103 100644
--- a/conf/pam_conv1/pam_conv_y.y
+++ b/conf/pam_conv1/pam_conv_y.y
@@ -72,7 +72,7 @@ line
 
     /* make sure we have lower case */
     for (i=0; $1[i]; ++i) {
-	$1[i] = tolower($1[i]);
+	$1[i] = tolower((unsigned char)$1[i]);
     }
 
     /* $1 = service-name */
-- 
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