From: Pádraig Brady <P@draigBrady.com>
Date: Mon, 25 Aug 2025 10:38:42 +0000 (+0100)
Subject: tests: fold: add a memory constraint test
X-Git-Tag: v9.8~93
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=17be45b952f0284df6f8e6eecf87a69880712c42;p=thirdparty%2Fcoreutils.git

tests: fold: add a memory constraint test

Enforcing this interface behavior is worthwhile
irrespective of our current implementation,
to ensure future or other implementations conform.

* tests/fold/fold-characters.sh: Ensure the fold implementation
uses bounded memory.
---

diff --git a/tests/fold/fold-characters.sh b/tests/fold/fold-characters.sh
index 0b22aad6be..a6cc39b73c 100755
--- a/tests/fold/fold-characters.sh
+++ b/tests/fold/fold-characters.sh
@@ -58,4 +58,10 @@ compare column-exp2 column-out2 || fail=1
 fold --characters -w 10 input2 > character-out2 || fail=1
 compare character-exp2 character-out2 || fail=1
 
+# Ensure bounded memory operation
+vm=$(get_min_ulimit_v_ fold /dev/null) && {
+  yes | tr -d '\n' | (ulimit -v $(($vm+8000)) && fold 2>err) | head -n10 || fail=1
+  compare /dev/null err || fail=1
+}
+
 Exit $fail