From: Collin Funk <collin.funk1@gmail.com>
Date: Thu, 9 Apr 2026 01:57:54 +0000 (-0700)
Subject: tests: avoid a failure on musl
X-Git-Tag: v9.11~10
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=1603c75d747ab6c95d24ba31ef92bdf672c0b568;p=thirdparty%2Fcoreutils.git

tests: avoid a failure on musl

* tests/misc/io-errors.sh: Allow a generic error string on musl since
the first line is emitted immediately instead of being buffered as
expected.
Reported by Bruno Haible.
---

diff --git a/tests/misc/io-errors.sh b/tests/misc/io-errors.sh
index 8d01aa913e..72bfeb4584 100755
--- a/tests/misc/io-errors.sh
+++ b/tests/misc/io-errors.sh
@@ -83,6 +83,15 @@ while read writer; do
   # For e.g. with _IOLBF etc, stdio will discard pending data at each line,
   # thus only giving a generic error upon ferror() in close_stream().
   error_re="$ENOSPC"
+
+  # musl writes the first line immediately when it should be fully buffered.
+  # As a result, when we print a single line there is no bytes buffered when
+  # we close the stream and errno is not set.  See:
+  # <https://www.openwall.com/lists/musl/2026/04/02/1>.
+  case $host_triplet in
+    *-musl*) error_re="$error_re|" ;;
+  esac
+
   printf '%s' "$writer" | grep 'generic' >/dev/null &&
     { error_re="write error|$error_re"; }