1 files changed, 45 insertions, 0 deletions
diff --git a/src/grep/gnulib-tests/test-dfa-match.sh b/src/grep/gnulib-tests/test-dfa-match.sh
new file mode 100755
index 0000000..983cdae
--- /dev/null
+++ b/src/grep/gnulib-tests/test-dfa-match.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+# This would fail with grep-2.21's dfa.c.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+# Add "." to PATH for the use of test-dfa-match-aux.
+path_prepend_ .
+
+if (type timeout) >/dev/null 2>&1; then
+    # Busybox's timeout required -t until its 1.30.0 release on 2018-12-31,
+    # after which it became compatible with coreutils' timeout.
+  if timeout --help 2>&1 | grep BusyBox && timeout -t 0 true; then
+    timeout_10='timeout -t 10'
+  else
+    timeout_10='timeout 10'
+  fi
+else
+  timeout_10=
+fi
+
+fail=0
+
+${CHECKER} test-dfa-match-aux a ba 0 > out || fail=1
+compare /dev/null out || fail=1
+
+in=$(printf "bb\nbb")
+$timeout_10 ${CHECKER} test-dfa-match-aux a "$in" 1 > out || fail=1
+compare /dev/null out || fail=1
+
+Exit $fail