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Diffstat (limited to 'tests/tail-2/tail-n0f.sh')
-rwxr-xr-x | tests/tail-2/tail-n0f.sh | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/tests/tail-2/tail-n0f.sh b/tests/tail-2/tail-n0f.sh new file mode 100755 index 000000000..2b2147a7f --- /dev/null +++ b/tests/tail-2/tail-n0f.sh @@ -0,0 +1,55 @@ +#!/bin/sh +# Make sure that 'tail -n0 -f' and 'tail -c0 -f' sleep +# rather than doing what amounted to a busy-wait. + +# Copyright (C) 2003-2012 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/>. + +# This bug was fixed for 5.0.91 +# It skips the test if your system lacks a /proc/$pid/status +# file, or if its contents don't look right. + +. "${srcdir=.}/init.sh"; path_prepend_ ../src +print_ver_ tail + +require_proc_pid_status_ + +touch empty || framework_failure_ +echo anything > nonempty || framework_failure_ + + +for inotify in ---disable-inotify ''; do + for file in empty nonempty; do + for c_or_n in c n; do + tail --sleep=4 -${c_or_n} 0 -f $inotify $file & + pid=$! + tail_sleeping() + { + local delay="$1"; sleep $delay + state=$(get_process_status_ $pid) + case $state in + S*) ;; + *) return 1;; + esac + } + # Wait up to 1.5s for tail to sleep + retry_delay_ tail_sleeping .1 4 || + { echo $0: process in unexpected state: $state >&2; fail=1; } + kill $pid + done + done +done + +Exit $fail |