#!/bin/sh
# Test the --pid option of tail.

# Copyright (C) 2003, 2006-2009 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

require_proc_pid_status_

touch here || framework_failure


fail=0

# Use tail itself to create a background process.

tail -f here &
bg_pid=$!

tail -s0.1 -f here --pid=$bg_pid &

pid=$!

sleep 0.5

state=$(get_process_status_ $pid)

if test -n "$state"; then
  case $state in
    S*) ;;
    *) echo "$0: process dead? (state=$state)" 1>&2; fail=1 ;;
  esac
  kill $pid
fi

kill $bg_pid

sleep 0.5

state=$(get_process_status_ $pid)

if test -n "$state"; then
  case $state in
    S*) echo $0: process still active 1>&2; fail=1 ;;
    *) ;;
  esac
  kill $pid
fi

Exit $fail