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// Copyright (C) 2017 Luke Shumaker <lukeshu@sbcglobal.net>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
// 02110-1301 USA
package nslcd_systemd_test
import (
"fmt"
"net"
"os"
"strings"
"testing"
"time"
"github.com/pkg/errors"
"golang.org/x/sys/unix"
)
func testWithTimeout(t *testing.T, timeout time.Duration, fn func(t *testing.T, s chan<- string)) {
finished := make(chan bool)
status := make(chan string)
cur_status := ""
go func() {
t.Run("timed", func(t *testing.T) { fn(t, status) })
finished <- true
}()
for {
select {
case cur_status = <-status:
case <-finished:
close(status)
return
case <-time.After(timeout):
close(status)
if cur_status != "" {
t.Fatal("timed out: " + cur_status)
} else {
t.Fatal("timed out")
}
return
}
}
}
var sdListenFds = uintptr(0)
var sdListenFdNames = []string{}
type filer interface {
Close() error
File() (*os.File, error)
}
func sdOpenStream(streampath string) (filer, error) {
// I should have this change based on type of stream
listener, err := net.ListenUnix("unix", &net.UnixAddr{Net: "unix", Name: streampath})
if err != nil {
return nil, errors.Wrap(err, "net.ListenUnix()")
}
listener.SetUnlinkOnClose(false)
return listener, nil
}
func fdIsDevNull(fd uintptr) error {
file := os.NewFile(fd, fmt.Sprintf("/dev/fd/%d", fd))
if file == nil {
return errors.Errorf("not a valid file descriptor: %d", fd)
}
statFd, err := file.Stat()
if err != nil {
return err
}
statNull, err := os.Stat("/dev/null")
if err != nil {
return err
}
if !os.SameFile(statFd, statNull) {
return errors.Errorf("FD %d is not /dev/null", fd)
}
return nil
}
func sdActivatedStream(streampath string) error {
// Set up the file descriptor
err := func(streampath string) error {
file, err := func(streampath string) (*os.File, error) {
listener, err := sdOpenStream(streampath)
if err != nil {
return nil, err
}
defer listener.Close()
file, err := listener.File()
if err != nil {
return nil, errors.Wrap(err, "listener.File()")
}
return file, nil
}(streampath)
if err != nil {
return err
}
defer file.Close()
fd := sdListenFds + 3
err = fdIsDevNull(fd)
if err != nil {
return err
}
err = unix.Dup2(int(file.Fd()), int(fd))
if err != nil {
return errors.Wrap(err, "Dup2()")
}
return nil
}(streampath)
if err != nil {
return err
}
sdListenFds++
sdListenFdNames = append(sdListenFdNames, streampath)
err = os.Setenv("LISTEN_PID", fmt.Sprintf("%d", os.Getpid()))
if err != nil {
return errors.Wrap(err, "os.Setenv()")
}
err = os.Setenv("LISTEN_FDS", fmt.Sprintf("%d", sdListenFds))
if err != nil {
return errors.Wrap(err, "os.Setenv()")
}
err = os.Setenv("LISTEN_FDNAMES", strings.Join(sdListenFdNames, ":"))
if err != nil {
return errors.Wrap(err, "os.Setenv()")
}
return nil
}
func sdActivatedReset() error {
devnull, err := os.OpenFile("/dev/null", os.O_RDWR, 0666)
if err != nil {
return err
}
defer devnull.Close()
for i := uintptr(0); i < sdListenFds; i++ {
err = unix.Dup2(int(devnull.Fd()), int(3+i))
if err != nil {
return err
}
}
sdListenFds = 0
sdListenFdNames = []string{}
return nil
}
func sdNotifyListen(sockname string) (*net.UnixConn, error) {
err := os.Setenv("NOTIFY_SOCKET", sockname)
if err != nil {
return nil, err
}
return net.ListenUnixgram("unixgram", &net.UnixAddr{Net: "unixgram", Name: sockname})
}
func sdNotifyHandle(sock *net.UnixConn, fn func(dat []byte, oob []byte) error) error {
var dat [4096]byte
oob := make([]byte, unix.CmsgSpace(unix.SizeofUcred)+unix.CmsgSpace(8*768))
for {
n, oobn, flags, _, err := sock.ReadMsgUnix(dat[:], oob[:])
if err != nil {
return err
}
if flags&unix.MSG_TRUNC != 0 {
// Received notify message exceeded maximum size. Ignoring."
continue
}
err = fn(dat[:n], oob[:oobn])
if err != nil {
return err
}
}
}
func humanizeU64(n uint64) string {
str := fmt.Sprintf("%d", n)
bts := make([]byte, len(str)+(len(str)-1)/3)
s := 0
b := 0
for s < len(str) && b < len(bts) {
if (s % 3 == 0 && s > 0) {
bts[len(bts)-1-b] = ','
b++
}
bts[len(bts)-1-b] = str[len(str)-1-s]
b++
s++
}
return string(bts)
}
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