linux-kernel - [PATCH 3/9] tools/nolibc/stdio: remove perror if NOLIBC_IGNORE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250915071115.1429196-4-benjamin@sipsolutions.net>
Date: Mon, 15 Sep 2025 09:11:09 +0200
From: Benjamin Berg <benjamin@...solutions.net>
To: linux-um@...ts.infradead.org,
	Willy Tarreau <w@....eu>,
	Thomas Weißschuh <linux@...ssschuh.net>,
	linux-kselftest@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: linux-kernel@...r.kernel.org,
	Tiwei Bie <tiwei.btw@...group.com>,
	Benjamin Berg <benjamin.berg@...el.com>
Subject: [PATCH 3/9] tools/nolibc/stdio: remove perror if NOLIBC_IGNORE_ERRNO is set

From: Benjamin Berg <benjamin.berg@...el.com>

There is no errno variable when NOLIBC_IGNORE_ERRNO is defined. As such,
the perror function does not make any sense then and cannot compile.

Fixes: acab7bcdb1bc ("tools/nolibc/stdio: add perror() to report the errno value")
Signed-off-by: Benjamin Berg <benjamin.berg@...el.com>
---
 tools/include/nolibc/stdio.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/include/nolibc/stdio.h b/tools/include/nolibc/stdio.h
index 7630234408c5..c512159b8374 100644
--- a/tools/include/nolibc/stdio.h
+++ b/tools/include/nolibc/stdio.h
@@ -597,11 +597,13 @@ int sscanf(const char *str, const char *format, ...)
 	return ret;
 }
 
+#ifndef NOLIBC_IGNORE_ERRNO
 static __attribute__((unused))
 void perror(const char *msg)
 {
 	fprintf(stderr, "%s%serrno=%d\n", (msg && *msg) ? msg : "", (msg && *msg) ? ": " : "", errno);
 }
+#endif
 
 static __attribute__((unused))
 int setvbuf(FILE *stream __attribute__((unused)),
-- 
2.51.0