blob: 007e5d770d35f72fc0b55fa1c25f5220d5863c1e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
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, 2006-2010 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
|
