1 files changed, 47 insertions, 0 deletions
diff --git a/tests/rm/many-dir-entries-vs-OOM.sh b/tests/rm/many-dir-entries-vs-OOM.sh
new file mode 100755
index 0000000..acbed3a
--- /dev/null
+++ b/tests/rm/many-dir-entries-vs-OOM.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+# In coreutils-8.12, rm,du,chmod, etc. would use too much memory
+# when processing a directory with many entries (as in > 100,000).
+
+# Copyright (C) 2011-2020 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/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ rm du chmod
+expensive_
+
+mkdir d2 \
+  && touch d2/f || framework_failure_
+
+# Restrict memory.  Each of these coreutils-8.12 programs would fail
+# with a diagnostic like "rm: fts_read failed: Cannot allocate memory".
+vm=$(get_min_ulimit_v_ du -sh d2) \
+  || skip_ "this shell lacks ulimit support"
+
+# With many files in a single directory...
+mkdir d || framework_failure_
+seq --format="d/%06g" 200000 | xargs touch || framework_failure_
+
+# Allow 35MiB more memory as for the trivial case above.
+(ulimit -v $(($vm + 35000)) && du -sh d) || fail=1
+
+vm=$(get_min_ulimit_v_ chmod -R 700 d2) \
+  || skip_ "this shell lacks ulimit support"
+(ulimit -v $(($vm + 35000)) && chmod -R 700 d) || fail=1
+
+vm=$(get_min_ulimit_v_ rm -rf d2) \
+  || skip_ "this shell lacks ulimit support"
+(ulimit -v $(($vm + 35000)) && rm -rf d) || fail=1
+
+Exit $fail