From c004d68c9395812bfcff82c2d7c4e56d36e72f1c Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Mon, 8 Dec 2025 19:06:36 -0500
Subject: [PATCH] Fix minor portability issue in pg_resetwal.c.

The argument of isspace() (like other <ctype.h> functions)
must be cast to unsigned char to ensure portable results.

Per NetBSD buildfarm members.  Oversight in 636c1914b.
---
 src/bin/pg_resetwal/pg_resetwal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/bin/pg_resetwal/pg_resetwal.c b/src/bin/pg_resetwal/pg_resetwal.c
index c667a11cb6a..07c95f9ab80 100644
--- a/src/bin/pg_resetwal/pg_resetwal.c
+++ b/src/bin/pg_resetwal/pg_resetwal.c
@@ -1246,7 +1246,7 @@ strtouint32_strict(const char *restrict s, char **restrict endptr, int base)
 	bool		is_neg;
 
 	/* skip leading whitespace */
-	while (isspace(*s))
+	while (isspace((unsigned char) *s))
 		s++;
 
 	/*