diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/Makefile.am | 1 | ||||
| -rwxr-xr-x | tests/tail-2/inotify-race | 66 |
2 files changed, 67 insertions, 0 deletions
diff --git a/tests/Makefile.am b/tests/Makefile.am index 62583477b..ae17e9fe2 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -74,6 +74,7 @@ EXTRA_DIST += $(TESTS) TESTS = \ misc/help-version \ + tail-2/inotify-race \ misc/invalid-opt \ rm/ext3-perf \ rm/cycle \ diff --git a/tests/tail-2/inotify-race b/tests/tail-2/inotify-race new file mode 100755 index 000000000..025272c02 --- /dev/null +++ b/tests/tail-2/inotify-race @@ -0,0 +1,66 @@ +#!/bin/sh +# Ensure that tail does not ignore data that is appended to a tailed-forever +# file between tail's initial read-to-EOF, and when the inotify watches +# are established in tail_forever_inotify. That data could be ignored +# indefinitely if no *other* data is appended, but it would be printed as +# soon as any additional appended data is detected. + +# Copyright (C) 2009 Free Software Foundation, Inc. + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +if test "$VERBOSE" = yes; then + set -x + tail --version +fi + +. $srcdir/test-lib.sh + +fail=0 + +touch file || framework_failure +touch tail.out || framework_failure + +( gdb --version ) > gdb.out 2>&1 +case $(cat gdb.out) in + *'GNU gdb'*) ;; + *) skip_test_ "can't run gdb";; +esac + +# See if gdb works: +gdb -nx --batch-silent \ + --eval-command='break tail_forever_inotify' \ + --eval-command='run -f file' \ + --eval-command='quit' \ + tail < /dev/null > gdb.out 2>&1 + +test -s gdb.out && skip_test_ "can't set breakpoints in tail" + +# Run "tail -f file", stopping to append a line just before +# inotify initialization, and then continue. Before the fix, +# that just-appended line would never be output. +timeout 10s gdb -nx --batch-silent \ + --eval-command='break tail_forever_inotify' \ + --eval-command='run -f file >> tail.out' \ + --eval-command="shell echo never-seen-with-tail-7.5 >> file" \ + --eval-command='continue' \ + --eval-command='quit' \ + tail < /dev/null & +pid=$! + +tail --pid=$pid -f tail.out | (read; kill $pid) + +test -s tail.out || fail=1 + +Exit $fail |