From: Manuel Ebner <manuelebner@mailbox.org>
To: Andy Shevchenko <andy.shevchenko@gmail.com>,
Kees Cook <kees@kernel.org>, Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Andy Whitcroft <apw@canonical.com>, Joe Perches <joe@perches.com>,
Dwaipayan Ray <dwaipayanray1@gmail.com>,
Lukas Bulwahn <lukas.bulwahn@gmail.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
David Laight <david.laight.linux@gmail.com>,
Randy Dunlap <rdunlap@infradead.org>,
Jani Nikula <jani.nikula@intel.com>,
Heiko Carstens <hca@linux.ibm.com>,
workflows@vger.kernel.org (open list:DOCUMENTATION PROCESS),
linux-doc@vger.kernel.org (open list:DOCUMENTATION),
linux-kernel@vger.kernel.org (open list)
Cc: Manuel Ebner <manuelebner@mailbox.org>
Subject: [PATCH v2 1/3] Doc: deprecated.rst: add strlcat()
Date: Thu, 14 May 2026 18:26:53 +0200 [thread overview]
Message-ID: <20260514162652.107714-2-manuelebner@mailbox.org> (raw)
In-Reply-To: <20260514160719.105084-3-manuelebner@mailbox.org>
add strlcat and alternatives
Signed-off-by: Manuel Ebner <manuelebner@mailbox.org>
---
Documentation/process/deprecated.rst | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/process/deprecated.rst b/Documentation/process/deprecated.rst
index fed56864d036..06e802f4bbfd 100644
--- a/Documentation/process/deprecated.rst
+++ b/Documentation/process/deprecated.rst
@@ -153,6 +153,13 @@ used, and the destinations should be marked with the `__nonstring
attribute to avoid future compiler warnings. For cases still needing
NUL-padding, strtomem_pad() can be used.
+strlcat()
+---------
+strlcat() must re-scan the destination string from the beginning on each
+call (O(n^2) behavior). Alternatives are seq_buf_puts() and seq_buf_printf().
+snprintf(), scnprintf() and sysfs_emit() are possible aswell, but the adoption
+of the arguments needs to be taken care off.
+
strlcpy()
---------
strlcpy() reads the entire source buffer first (since the return value
--
2.54.0
next prev parent reply other threads:[~2026-05-14 16:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-14 16:07 [PATCH v2 0/3] Doc, scripts: facilitate phaseout of strlcat Manuel Ebner
2026-05-14 16:26 ` Manuel Ebner [this message]
2026-05-14 16:31 ` [PATCH v2 1/3] Doc: deprecated.rst: add strlcat() Kees Cook
2026-05-14 17:51 ` Randy Dunlap
2026-05-14 16:28 ` [PATCH v2 2/3] scripts: checkpatch.pl: add warning for strlcat() Manuel Ebner
2026-05-14 16:32 ` Kees Cook
2026-05-14 16:30 ` [PATCH v2 3/3] drivers: add deprecated remarks to strlcat() Manuel Ebner
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