mirror of
git://git.sv.gnu.org/coreutils.git
synced 2026-02-20 14:22:26 +02:00
77 lines
2.1 KiB
Bash
Executable File
77 lines
2.1 KiB
Bash
Executable File
#!/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 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 2 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, write to the Free Software
|
|
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
# 02110-1301, USA.
|
|
|
|
|
|
# This bug was fixed for 5.0.91
|
|
# It skips the test if your system lacks a /proc/$pid/status
|
|
# file, or if its contents don't look right.
|
|
|
|
if test "$VERBOSE" = yes; then
|
|
set -x
|
|
tail --version
|
|
fi
|
|
|
|
sleep 2 &
|
|
pid=$!
|
|
sleep .5
|
|
grep '^State:[ ]*[S]' /proc/$pid/status > /dev/null 2>&1 || \
|
|
{
|
|
echo "$0:/proc/$pid/status: missing or 'different': skipping this test" 1>&2
|
|
(exit 77); exit 77
|
|
}
|
|
kill $pid
|
|
|
|
pwd=`pwd`
|
|
t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$
|
|
trap 'status=$?; cd $pwd; chmod -R u+rwx $t0; rm -rf $t0 && exit $status' 0
|
|
trap '(exit $?); exit $?' 1 2 13 15
|
|
|
|
framework_failure=0
|
|
mkdir -p $tmp || framework_failure=1
|
|
cd $tmp || framework_failure=1
|
|
touch empty || framework_failure=1
|
|
echo anything > nonempty || framework_failure=1
|
|
|
|
if test $framework_failure = 1; then
|
|
echo "$0: failure in testing framework" 1>&2
|
|
(exit 1); exit 1
|
|
fi
|
|
|
|
fail=0
|
|
|
|
for file in empty nonempty; do
|
|
for c_or_n in c n; do
|
|
tail --sleep=4 -${c_or_n} 0 -f $file &
|
|
pid=$!
|
|
sleep .5
|
|
set _ `sed -n '/^State:[ ]*\([^ ]\)/s//\1/p' /proc/$pid/status`
|
|
shift # Remove the leading `_'.
|
|
state=$1
|
|
case $state in
|
|
S*) ;;
|
|
*) echo $0: process in unexpected state: $state 1>&2; fail=1 ;;
|
|
esac
|
|
kill $pid
|
|
done
|
|
done
|
|
|
|
(exit $fail); exit $fail
|