2017-09-30 16:47:47 +00:00
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build linux
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package unix_test
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import (
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"io/ioutil"
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"os"
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"testing"
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"time"
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"golang.org/x/sys/unix"
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)
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func TestFchmodat(t *testing.T) {
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defer chtmpdir(t)()
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touch(t, "file1")
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os.Symlink("file1", "symlink1")
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err := unix.Fchmodat(unix.AT_FDCWD, "symlink1", 0444, 0)
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if err != nil {
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t.Fatalf("Fchmodat: unexpected error: %v", err)
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}
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fi, err := os.Stat("file1")
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if err != nil {
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t.Fatal(err)
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}
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if fi.Mode() != 0444 {
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t.Errorf("Fchmodat: failed to change mode: expected %v, got %v", 0444, fi.Mode())
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}
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err = unix.Fchmodat(unix.AT_FDCWD, "symlink1", 0444, unix.AT_SYMLINK_NOFOLLOW)
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if err != unix.EOPNOTSUPP {
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t.Fatalf("Fchmodat: unexpected error: %v, expected EOPNOTSUPP", err)
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}
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}
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func TestIoctlGetInt(t *testing.T) {
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f, err := os.Open("/dev/random")
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if err != nil {
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t.Fatalf("failed to open device: %v", err)
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}
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defer f.Close()
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v, err := unix.IoctlGetInt(int(f.Fd()), unix.RNDGETENTCNT)
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if err != nil {
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t.Fatalf("failed to perform ioctl: %v", err)
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}
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t.Logf("%d bits of entropy available", v)
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}
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func TestPpoll(t *testing.T) {
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f, cleanup := mktmpfifo(t)
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defer cleanup()
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const timeout = 100 * time.Millisecond
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ok := make(chan bool, 1)
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go func() {
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select {
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case <-time.After(10 * timeout):
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t.Errorf("Ppoll: failed to timeout after %d", 10*timeout)
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case <-ok:
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}
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}()
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fds := []unix.PollFd{{Fd: int32(f.Fd()), Events: unix.POLLIN}}
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timeoutTs := unix.NsecToTimespec(int64(timeout))
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n, err := unix.Ppoll(fds, &timeoutTs, nil)
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ok <- true
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if err != nil {
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t.Errorf("Ppoll: unexpected error: %v", err)
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return
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}
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if n != 0 {
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t.Errorf("Ppoll: wrong number of events: got %v, expected %v", n, 0)
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return
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}
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}
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func TestTime(t *testing.T) {
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var ut unix.Time_t
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ut2, err := unix.Time(&ut)
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if err != nil {
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t.Fatalf("Time: %v", err)
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}
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if ut != ut2 {
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t.Errorf("Time: return value %v should be equal to argument %v", ut2, ut)
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}
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var now time.Time
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for i := 0; i < 10; i++ {
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ut, err = unix.Time(nil)
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if err != nil {
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t.Fatalf("Time: %v", err)
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}
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now = time.Now()
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if int64(ut) == now.Unix() {
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return
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}
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}
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t.Errorf("Time: return value %v should be nearly equal to time.Now().Unix() %v", ut, now.Unix())
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}
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func TestUtime(t *testing.T) {
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defer chtmpdir(t)()
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touch(t, "file1")
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buf := &unix.Utimbuf{
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Modtime: 12345,
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}
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err := unix.Utime("file1", buf)
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if err != nil {
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t.Fatalf("Utime: %v", err)
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}
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fi, err := os.Stat("file1")
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if err != nil {
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t.Fatal(err)
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}
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if fi.ModTime().Unix() != 12345 {
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t.Errorf("Utime: failed to change modtime: expected %v, got %v", 12345, fi.ModTime().Unix())
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}
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}
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2018-01-03 19:19:49 +00:00
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func TestUtimesNanoAt(t *testing.T) {
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defer chtmpdir(t)()
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symlink := "symlink1"
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os.Remove(symlink)
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err := os.Symlink("nonexisting", symlink)
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if err != nil {
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t.Fatal(err)
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}
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ts := []unix.Timespec{
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{Sec: 1111, Nsec: 2222},
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{Sec: 3333, Nsec: 4444},
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}
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err = unix.UtimesNanoAt(unix.AT_FDCWD, symlink, ts, unix.AT_SYMLINK_NOFOLLOW)
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if err != nil {
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t.Fatalf("UtimesNanoAt: %v", err)
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}
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var st unix.Stat_t
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err = unix.Lstat(symlink, &st)
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if err != nil {
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t.Fatalf("Lstat: %v", err)
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}
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if st.Atim != ts[0] {
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t.Errorf("UtimesNanoAt: wrong atime: %v", st.Atim)
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}
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if st.Mtim != ts[1] {
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t.Errorf("UtimesNanoAt: wrong mtime: %v", st.Mtim)
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}
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}
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2017-09-30 16:47:47 +00:00
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func TestGetrlimit(t *testing.T) {
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var rlim unix.Rlimit
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err := unix.Getrlimit(unix.RLIMIT_AS, &rlim)
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if err != nil {
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t.Fatalf("Getrlimit: %v", err)
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}
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}
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2017-10-06 15:29:20 +00:00
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func TestSelect(t *testing.T) {
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2018-01-03 19:19:49 +00:00
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_, err := unix.Select(0, nil, nil, nil, &unix.Timeval{Sec: 0, Usec: 0})
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2017-10-06 15:29:20 +00:00
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if err != nil {
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t.Fatalf("Select: %v", err)
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}
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2018-01-03 19:19:49 +00:00
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dur := 150 * time.Millisecond
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tv := unix.NsecToTimeval(int64(dur))
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start := time.Now()
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_, err = unix.Select(0, nil, nil, nil, &tv)
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took := time.Since(start)
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if err != nil {
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t.Fatalf("Select: %v", err)
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}
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if took < dur {
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t.Errorf("Select: timeout should have been at least %v, got %v", dur, took)
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}
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}
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func TestPselect(t *testing.T) {
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_, err := unix.Pselect(0, nil, nil, nil, &unix.Timespec{Sec: 0, Nsec: 0}, nil)
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if err != nil {
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t.Fatalf("Pselect: %v", err)
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}
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dur := 2500 * time.Microsecond
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ts := unix.NsecToTimespec(int64(dur))
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start := time.Now()
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_, err = unix.Pselect(0, nil, nil, nil, &ts, nil)
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took := time.Since(start)
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if err != nil {
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t.Fatalf("Pselect: %v", err)
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}
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if took < dur {
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t.Errorf("Pselect: timeout should have been at least %v, got %v", dur, took)
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}
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}
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func TestFstatat(t *testing.T) {
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defer chtmpdir(t)()
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touch(t, "file1")
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var st1 unix.Stat_t
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err := unix.Stat("file1", &st1)
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if err != nil {
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t.Fatalf("Stat: %v", err)
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}
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var st2 unix.Stat_t
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err = unix.Fstatat(unix.AT_FDCWD, "file1", &st2, 0)
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if err != nil {
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t.Fatalf("Fstatat: %v", err)
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}
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if st1 != st2 {
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t.Errorf("Fstatat: returned stat does not match Stat")
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}
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os.Symlink("file1", "symlink1")
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err = unix.Lstat("symlink1", &st1)
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if err != nil {
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t.Fatalf("Lstat: %v", err)
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}
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err = unix.Fstatat(unix.AT_FDCWD, "symlink1", &st2, unix.AT_SYMLINK_NOFOLLOW)
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if err != nil {
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t.Fatalf("Fstatat: %v", err)
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}
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if st1 != st2 {
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t.Errorf("Fstatat: returned stat does not match Lstat")
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}
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2017-10-06 15:29:20 +00:00
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}
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2017-09-30 16:47:47 +00:00
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// utilities taken from os/os_test.go
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func touch(t *testing.T, name string) {
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f, err := os.Create(name)
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if err != nil {
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t.Fatal(err)
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}
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if err := f.Close(); err != nil {
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t.Fatal(err)
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}
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}
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// chtmpdir changes the working directory to a new temporary directory and
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// provides a cleanup function. Used when PWD is read-only.
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func chtmpdir(t *testing.T) func() {
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oldwd, err := os.Getwd()
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if err != nil {
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t.Fatalf("chtmpdir: %v", err)
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}
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d, err := ioutil.TempDir("", "test")
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if err != nil {
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t.Fatalf("chtmpdir: %v", err)
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}
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if err := os.Chdir(d); err != nil {
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t.Fatalf("chtmpdir: %v", err)
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}
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return func() {
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if err := os.Chdir(oldwd); err != nil {
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t.Fatalf("chtmpdir: %v", err)
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}
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os.RemoveAll(d)
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}
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}
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