From a3ce33c106c3db936deb3bfa9784d6e53f921233 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sat, 28 Oct 2023 09:30:49 -0700
Subject: [PATCH] stdbuf: port to oddball toupper

* src/stdbuf.c: Do not include ctype.h.
(set_libstdbuf_options): Use c_toupper, not toupper,
since the C locale is intended here.
---
 src/stdbuf.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/stdbuf.c b/src/stdbuf.c
index 51326ad4e..65142fd8c 100644
--- a/src/stdbuf.c
+++ b/src/stdbuf.c
@@ -17,7 +17,6 @@
 /* Written by Pádraig Brady.  */
 
 #include <config.h>
-#include <ctype.h>
 #include <stdio.h>
 #include <getopt.h>
 #include <sys/types.h>
@@ -286,10 +285,10 @@ set_libstdbuf_options (void)
 
           if (*stdbuf[i].optarg == 'L')
             ret = asprintf (&var, "%s%c=L", "_STDBUF_",
-                            toupper (stdbuf[i].optc));
+                            c_toupper (stdbuf[i].optc));
           else
             ret = asprintf (&var, "%s%c=%zu", "_STDBUF_",
-                            toupper (stdbuf[i].optc),
+                            c_toupper (stdbuf[i].optc),
                             stdbuf[i].size);
           if (ret < 0)
             xalloc_die ();
-- 
2.11.4.GIT