From: Paul Eggert <eggert@cs.ucla.edu>
Date: Sun, 27 Jul 2025 19:36:53 +0000 (-0700)
Subject: tail: check OFF_T_MAX vs COPY_A_BUFFER
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae37265727ad5e6f43a4887e2d977e8ffb59ce65;p=thirdparty%2Fcoreutils.git

tail: check OFF_T_MAX vs COPY_A_BUFFER

* src/tail.c: Document an otherwise-unstated assumption.
---

diff --git a/src/tail.c b/src/tail.c
index 255f581fa1..8dd03a7c4d 100644
--- a/src/tail.c
+++ b/src/tail.c
@@ -81,6 +81,7 @@
 /* Special values for dump_remainder's N_BYTES parameter.  */
 #define COPY_TO_EOF UINTMAX_MAX
 #define COPY_A_BUFFER (UINTMAX_MAX - 1)
+static_assert (OFF_T_MAX < COPY_A_BUFFER);
 
 /* FIXME: make Follow_name the default?  */
 #define DEFAULT_FOLLOW_MODE Follow_descriptor