diff options
Diffstat (limited to 'tests/tail-2/wait.sh')
-rwxr-xr-x | tests/tail-2/wait.sh | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/tests/tail-2/wait.sh b/tests/tail-2/wait.sh new file mode 100755 index 0000000..6338e8f --- /dev/null +++ b/tests/tail-2/wait.sh @@ -0,0 +1,90 @@ +#!/bin/sh +# Make sure that 'tail -f' returns immediately if a file doesn't exist +# while 'tail -F' waits for it to appear. + +# Copyright (C) 2003-2020 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/>. + +. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src +print_ver_ tail + +grep '^#define HAVE_INOTIFY 1' "$CONFIG_HEADER" >/dev/null \ + && HAVE_INOTIFY=1 + +inotify_failed_re='inotify (resources exhausted|cannot be used)' + +touch here || framework_failure_ +{ touch unreadable && chmod a-r unreadable; } || framework_failure_ + +# Terminate any background tail process +cleanup_() { kill $pid 2>/dev/null && wait $pid; } + +# speedup non inotify case +fastpoll='-s.1 --max-unchanged-stats=1' + +for mode in '' '---disable-inotify'; do + returns_ 124 timeout 10 tail $fastpoll -f $mode not_here && fail=1 + + if test ! -r unreadable; then # can't test this when root + returns_ 124 timeout 10 tail $fastpoll -f $mode unreadable && fail=1 + fi + + returns_ 124 timeout .1 tail $fastpoll -f $mode here 2>tail.err || fail=1 + + # 'tail -F' must wait in any case. + + returns_ 124 timeout .1 tail $fastpoll -F $mode here 2>>tail.err || fail=1 + + if test ! -r unreadable; then # can't test this when root + returns_ 124 timeout .1 tail $fastpoll -F $mode unreadable || fail=1 + fi + + returns_ 124 timeout .1 tail $fastpoll -F $mode not_here || fail=1 + + grep -Ev "$inotify_failed_re" tail.err > x + mv x tail.err + compare /dev/null tail.err || fail=1 + >tail.err +done + +if test "$HAVE_INOTIFY" && test -z "$mode" && is_local_dir_ .; then + # Ensure -F never follows a descriptor after rename + # either with tiny or significant delays between operations + tail_F() + { + local delay="$1" + + > k && > tail.out && > tail.err || framework_failure_ + tail $fastpoll -F $mode k >tail.out 2>tail.err & pid=$! + sleep $delay + mv k l + sleep $delay + touch k + mv k l + sleep $delay + echo NO >> l + sleep $delay + cleanup_ + rm -f k l + + test -s tail.out \ + && ! grep -E "$inotify_failed_re" tail.err >/dev/null + } + + retry_delay_ tail_F 0 1 && { cat tail.out; fail=1; } + retry_delay_ tail_F .2 1 && { cat tail.out; fail=1; } +fi + +Exit $fail |