From 8ffec2a3aba6f114784e11f89ef1d57a096ae540 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 19:39:29 +0200 Subject: Adding upstream version 8.32. Signed-off-by: Daniel Baumann --- tests/du/move-dir-while-traversing.sh | 99 +++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100755 tests/du/move-dir-while-traversing.sh (limited to 'tests/du/move-dir-while-traversing.sh') diff --git a/tests/du/move-dir-while-traversing.sh b/tests/du/move-dir-while-traversing.sh new file mode 100755 index 0000000..37147d2 --- /dev/null +++ b/tests/du/move-dir-while-traversing.sh @@ -0,0 +1,99 @@ +#!/bin/sh +# Trigger a failed assertion in coreutils-8.9 and earlier. + +# 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 . + +. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src +print_ver_ du +require_trap_signame_ + +# We use a python-inotify script, so... +python -m pyinotify -h > /dev/null \ + || skip_ 'python inotify package not installed' + +# Move a directory "up" while du is processing its sub-directories. +# While du is processing a hierarchy .../B/C/D/... this script +# detects when du opens D/, and then moves C/ "up" one level +# so that it is a sibling of B/. +# Given the inherent race condition, we have to add enough "weight" +# under D/ so that in most cases, the monitor performs the single +# rename syscall before du finishes processing the subtree under D/. + +cat <<'EOF' > inotify-watch-for-dir-access.py +#!/usr/bin/env python +import pyinotify as pn +import os,sys + +dir = sys.argv[1] +dest_parent = os.path.dirname(os.path.dirname(dir)) +dest = os.path.join(dest_parent, os.path.basename(dir)) + +class ProcessDir(pn.ProcessEvent): + + def process_IN_OPEN(self, event): + os.rename(dir, dest) + sys.exit(0) + + def process_default(self, event): + pass + +wm = pn.WatchManager() +notifier = pn.Notifier(wm) +wm.watch_transient_file(dir, pn.IN_OPEN, ProcessDir) +sys.stdout.write('started\n') +sys.stdout.flush() +notifier.loop() +EOF +chmod a+x inotify-watch-for-dir-access.py + +t=T/U +mkdir d2 || framework_failure_ +long=d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z +# One iteration of this loop creates a tree with which +# du sometimes completes its traversal before the above rename. +# Five iterations was not enough in 2 of 7 "make -j20 check" runs on a +# 6/12-core system. However, using "10", I saw no failure in 20 trials. +# Using 10 iterations was not enough, either. +# Using 50, I saw no failure in 200 trials. +for i in $(seq 50); do + mkdir -p $t/3/a/b/c/$i/$long || framework_failure_ +done + +# Terminate any background cp process +cleanup_() { kill $pid 2>/dev/null && wait $pid; } + +# Prohibit suspension, which could otherwise cause a timeout-induced FP failure. +trap '' TSTP + +timeout 6 ./inotify-watch-for-dir-access.py $t/3/a/b > start-msg & pid=$! + +# Wait for the watcher to start... +nonempty() { sleep $1; test -s start-msg; } +retry_delay_ nonempty .1 5 || fail=1 + +# The above watches for an IN_OPEN event on $t/3/a/b, +# and when it triggers, moves the parent, $t/3/a, up one level +# so it's directly under $t. + +# Before coreutils-8.10, du would abort. +returns_ 1 du -a $t d2 2> err || fail=1 + +# check for the new diagnostic +printf "du: fts_read failed: $t/3/a/b: No such file or directory\n" > exp \ + || fail=1 +compare exp err || fail=1 + +Exit $fail -- cgit v1.2.3