https://bugs.gentoo.org/969014
https://gitlab.com/procps-ng/procps/-/issues/410
https://gitlab.com/procps-ng/procps/-/merge_requests/282

From 98f60043abb4d45661b3adee261e4a14cf94c025 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ulrich=20M=C3=BCller?= <ulm@gentoo.org>
Date: Sun, 25 Jan 2026 13:35:34 +0100
Subject: [PATCH] sysctl: Respect ignore_failure also for close_stream
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When the kernel rejects an unknown value for given a key, then output
will be pending and close_stream will fail (typically with ENOENT).

Signed-off-by: Ulrich Müller <ulm@gentoo.org>
---
 src/sysctl.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/sysctl.c b/src/sysctl.c
index d04d5e36..b702fd9f 100644
--- a/src/sysctl.c
+++ b/src/sysctl.c
@@ -623,9 +623,12 @@ static int WriteSetting(
             if (0 < fprintf(fp, "%s\n", value))
                 rc = EXIT_SUCCESS;
             if (close_stream(fp) != 0) {
-                warn(_("setting key \"%s\""), dotted_key);
+                warn(_("setting key \"%s\"%s"),
+                     dotted_key, (ignore_failure?_(", ignoring"):""));
 		free(dotted_key);
-                return EXIT_FAILURE;
+                if (!ignore_failure)
+                    rc = EXIT_FAILURE;
+                return rc;
             }
         }
     }
-- 
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