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author | Jim Meyering <meyering@redhat.com> | 2009-09-06 09:39:31 +0200 |
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committer | Jim Meyering <meyering@redhat.com> | 2009-09-06 09:40:43 +0200 |
commit | d54376db68adf655b5f09855442b2983fc2f4f3e (patch) | |
tree | 957e98a9660c3dee1af27a3300aa4d451732731b /tests/tail-2/flush-initial | |
parent | af054f80b24d1ed3ac0cb9c4593eac5f0a3c5788 (diff) | |
download | coreutils-d54376db68adf655b5f09855442b2983fc2f4f3e.tar.xz |
tail: flush initial output before possibly blocking
* src/tail.c (main): Flush any output from tail_file,
before calling tail_forever_inotify, which can block.
* tests/tail-2/flush-initial: New file. Test for the bug.
* tests/Makefile.am (TESTS): Add tail-2/flush-initial.
* NEWS (Bug fixes): Mention it.
This bug was introduced in coreutils-7.5 via commit ae494d4b,
2009-06-02, "tail: use inotify if it is available".
Diffstat (limited to 'tests/tail-2/flush-initial')
-rwxr-xr-x | tests/tail-2/flush-initial | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/tests/tail-2/flush-initial b/tests/tail-2/flush-initial new file mode 100755 index 000000000..2deff84f3 --- /dev/null +++ b/tests/tail-2/flush-initial @@ -0,0 +1,41 @@ +#!/bin/sh +# inotify-based tail -f didn't flush its initial output before blocking + +# 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 + +. $srcdir/test-lib.sh + +fail=0 +echo line > in || fail=1 +stdbuf --output=1K tail -f in > out & +tail_pid=$! + +# Wait for the backgrounded `tail' to start. +while :; do + env kill -0 $tail_pid && break + sleep .1 +done + +test -s out || fail=1 + +kill $tail_pid + +Exit $fail |