2017-11-20 06:10:04 +01:00
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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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"os"
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2018-07-07 06:18:14 +02:00
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"runtime"
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"runtime/debug"
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2017-11-20 06:10:04 +01:00
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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 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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2018-07-07 06:18:14 +02:00
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if runtime.GOOS == "android" {
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t.Skip("mkfifo syscall is not available on android, skipping test")
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}
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2017-11-20 06:10:04 +01:00
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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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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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2018-07-07 06:18:14 +02:00
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// Only check Mtim, Atim might not be supported by the underlying filesystem
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expected := ts[1]
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if st.Mtim.Nsec == 0 {
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// Some filesystems only support 1-second time stamp resolution
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// and will always set Nsec to 0.
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expected.Nsec = 0
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2017-11-20 06:10:04 +01:00
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}
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2018-07-07 06:18:14 +02:00
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if st.Mtim != expected {
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t.Errorf("UtimesNanoAt: wrong mtime: expected %v, got %v", expected, st.Mtim)
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2017-11-20 06:10:04 +01:00
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}
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}
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2018-07-07 06:18:14 +02:00
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func TestRlimitAs(t *testing.T) {
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// disable GC during to avoid flaky test
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defer debug.SetGCPercent(debug.SetGCPercent(-1))
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2017-11-20 06:10:04 +01:00
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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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2018-07-07 06:18:14 +02:00
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var zero unix.Rlimit
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if zero == rlim {
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t.Fatalf("Getrlimit: got zero value %#v", rlim)
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}
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set := rlim
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set.Cur = uint64(unix.Getpagesize())
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err = unix.Setrlimit(unix.RLIMIT_AS, &set)
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if err != nil {
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t.Fatalf("Setrlimit: set failed: %#v %v", set, err)
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}
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// RLIMIT_AS was set to the page size, so mmap()'ing twice the page size
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// should fail. See 'man 2 getrlimit'.
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_, err = unix.Mmap(-1, 0, 2*unix.Getpagesize(), unix.PROT_NONE, unix.MAP_ANON|unix.MAP_PRIVATE)
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if err == nil {
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t.Fatal("Mmap: unexpectedly suceeded after setting RLIMIT_AS")
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}
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err = unix.Setrlimit(unix.RLIMIT_AS, &rlim)
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if err != nil {
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t.Fatalf("Setrlimit: restore failed: %#v %v", rlim, err)
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}
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b, err := unix.Mmap(-1, 0, 2*unix.Getpagesize(), unix.PROT_NONE, unix.MAP_ANON|unix.MAP_PRIVATE)
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if err != nil {
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t.Fatalf("Mmap: %v", err)
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}
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err = unix.Munmap(b)
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if err != nil {
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t.Fatalf("Munmap: %v", err)
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}
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2017-11-20 06:10:04 +01:00
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}
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func TestSelect(t *testing.T) {
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_, err := unix.Select(0, nil, nil, nil, &unix.Timeval{Sec: 0, Usec: 0})
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if err != nil {
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t.Fatalf("Select: %v", err)
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}
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2018-07-07 06:18:14 +02:00
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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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2017-11-26 01:53:51 +01:00
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2018-07-07 06:18:14 +02:00
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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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2017-11-26 01:53:51 +01:00
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2018-07-07 06:18:14 +02:00
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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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2017-11-26 01:53:51 +01:00
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if err != nil {
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2018-07-07 06:18:14 +02:00
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t.Fatalf("Pselect: %v", err)
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2017-11-26 01:53:51 +01:00
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}
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2018-07-07 06:18:14 +02:00
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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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2017-11-26 01:53:51 +01:00
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if err != nil {
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2018-07-07 06:18:14 +02:00
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t.Fatalf("Pselect: %v", err)
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2017-11-26 01:53:51 +01:00
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}
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2018-07-07 06:18:14 +02:00
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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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2017-11-26 01:53:51 +01:00
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}
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2018-07-07 06:18:14 +02:00
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}
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2017-11-26 01:53:51 +01:00
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2018-07-07 06:18:14 +02:00
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func TestSchedSetaffinity(t *testing.T) {
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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2017-11-26 01:53:51 +01:00
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2018-07-07 06:18:14 +02:00
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var oldMask unix.CPUSet
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err := unix.SchedGetaffinity(0, &oldMask)
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2017-11-26 01:53:51 +01:00
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if err != nil {
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2018-07-07 06:18:14 +02:00
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t.Fatalf("SchedGetaffinity: %v", err)
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}
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var newMask unix.CPUSet
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newMask.Zero()
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if newMask.Count() != 0 {
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t.Errorf("CpuZero: didn't zero CPU set: %v", newMask)
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}
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cpu := 1
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newMask.Set(cpu)
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if newMask.Count() != 1 || !newMask.IsSet(cpu) {
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t.Errorf("CpuSet: didn't set CPU %d in set: %v", cpu, newMask)
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}
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cpu = 5
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newMask.Set(cpu)
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if newMask.Count() != 2 || !newMask.IsSet(cpu) {
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t.Errorf("CpuSet: didn't set CPU %d in set: %v", cpu, newMask)
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}
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newMask.Clear(cpu)
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if newMask.Count() != 1 || newMask.IsSet(cpu) {
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t.Errorf("CpuClr: didn't clear CPU %d in set: %v", cpu, newMask)
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}
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if runtime.NumCPU() < 2 {
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t.Skip("skipping setaffinity tests on single CPU system")
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}
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if runtime.GOOS == "android" {
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t.Skip("skipping setaffinity tests on android")
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}
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err = unix.SchedSetaffinity(0, &newMask)
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if err != nil {
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t.Fatalf("SchedSetaffinity: %v", err)
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2017-11-26 01:53:51 +01:00
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}
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2018-07-07 06:18:14 +02:00
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var gotMask unix.CPUSet
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err = unix.SchedGetaffinity(0, &gotMask)
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2017-11-26 01:53:51 +01:00
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if err != nil {
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2018-07-07 06:18:14 +02:00
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t.Fatalf("SchedGetaffinity: %v", err)
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2017-11-26 01:53:51 +01:00
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}
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2018-07-07 06:18:14 +02:00
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if gotMask != newMask {
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t.Errorf("SchedSetaffinity: returned affinity mask does not match set affinity mask")
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}
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// Restore old mask so it doesn't affect successive tests
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err = unix.SchedSetaffinity(0, &oldMask)
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if err != nil {
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t.Fatalf("SchedSetaffinity: %v", err)
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2017-11-26 01:53:51 +01:00
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}
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}
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2018-07-07 06:18:14 +02:00
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func TestStatx(t *testing.T) {
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var stx unix.Statx_t
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err := unix.Statx(unix.AT_FDCWD, ".", 0, 0, &stx)
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if err == unix.ENOSYS || err == unix.EPERM {
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t.Skip("statx syscall is not available, skipping test")
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} else if err != nil {
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t.Fatalf("Statx: %v", err)
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}
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defer chtmpdir(t)()
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touch(t, "file1")
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var st unix.Stat_t
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err = unix.Stat("file1", &st)
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if err != nil {
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t.Fatalf("Stat: %v", err)
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}
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2017-11-20 06:10:04 +01:00
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2018-07-07 06:18:14 +02:00
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flags := unix.AT_STATX_SYNC_AS_STAT
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err = unix.Statx(unix.AT_FDCWD, "file1", flags, unix.STATX_ALL, &stx)
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2017-11-20 06:10:04 +01:00
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if err != nil {
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2018-07-07 06:18:14 +02:00
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t.Fatalf("Statx: %v", err)
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}
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if uint32(stx.Mode) != st.Mode {
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t.Errorf("Statx: returned stat mode does not match Stat")
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}
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ctime := unix.StatxTimestamp{Sec: int64(st.Ctim.Sec), Nsec: uint32(st.Ctim.Nsec)}
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mtime := unix.StatxTimestamp{Sec: int64(st.Mtim.Sec), Nsec: uint32(st.Mtim.Nsec)}
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if stx.Ctime != ctime {
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t.Errorf("Statx: returned stat ctime does not match Stat")
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2017-11-20 06:10:04 +01:00
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}
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2018-07-07 06:18:14 +02:00
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if stx.Mtime != mtime {
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t.Errorf("Statx: returned stat mtime does not match Stat")
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}
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err = os.Symlink("file1", "symlink1")
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if err != nil {
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2017-11-20 06:10:04 +01:00
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t.Fatal(err)
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}
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2018-07-07 06:18:14 +02:00
|
|
|
err = unix.Lstat("symlink1", &st)
|
2017-11-20 06:10:04 +01:00
|
|
|
if err != nil {
|
2018-07-07 06:18:14 +02:00
|
|
|
t.Fatalf("Lstat: %v", err)
|
|
|
|
}
|
|
|
|
|
|
|
|
err = unix.Statx(unix.AT_FDCWD, "symlink1", flags, unix.STATX_BASIC_STATS, &stx)
|
|
|
|
if err != nil {
|
|
|
|
t.Fatalf("Statx: %v", err)
|
|
|
|
}
|
|
|
|
|
|
|
|
// follow symlink, expect a regulat file
|
|
|
|
if stx.Mode&unix.S_IFREG == 0 {
|
|
|
|
t.Errorf("Statx: didn't follow symlink")
|
2017-11-20 06:10:04 +01:00
|
|
|
}
|
2018-07-07 06:18:14 +02:00
|
|
|
|
|
|
|
err = unix.Statx(unix.AT_FDCWD, "symlink1", flags|unix.AT_SYMLINK_NOFOLLOW, unix.STATX_ALL, &stx)
|
2017-11-20 06:10:04 +01:00
|
|
|
if err != nil {
|
2018-07-07 06:18:14 +02:00
|
|
|
t.Fatalf("Statx: %v", err)
|
|
|
|
}
|
|
|
|
|
|
|
|
// follow symlink, expect a symlink
|
|
|
|
if stx.Mode&unix.S_IFLNK == 0 {
|
|
|
|
t.Errorf("Statx: unexpectedly followed symlink")
|
|
|
|
}
|
|
|
|
if uint32(stx.Mode) != st.Mode {
|
|
|
|
t.Errorf("Statx: returned stat mode does not match Lstat")
|
|
|
|
}
|
|
|
|
|
|
|
|
ctime = unix.StatxTimestamp{Sec: int64(st.Ctim.Sec), Nsec: uint32(st.Ctim.Nsec)}
|
|
|
|
mtime = unix.StatxTimestamp{Sec: int64(st.Mtim.Sec), Nsec: uint32(st.Mtim.Nsec)}
|
|
|
|
|
|
|
|
if stx.Ctime != ctime {
|
|
|
|
t.Errorf("Statx: returned stat ctime does not match Lstat")
|
2017-11-20 06:10:04 +01:00
|
|
|
}
|
2018-07-07 06:18:14 +02:00
|
|
|
if stx.Mtime != mtime {
|
|
|
|
t.Errorf("Statx: returned stat mtime does not match Lstat")
|
2017-11-20 06:10:04 +01:00
|
|
|
}
|
2018-07-07 06:18:14 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
// stringsFromByteSlice converts a sequence of attributes to a []string.
|
|
|
|
// On Linux, each entry is a NULL-terminated string.
|
|
|
|
func stringsFromByteSlice(buf []byte) []string {
|
|
|
|
var result []string
|
|
|
|
off := 0
|
|
|
|
for i, b := range buf {
|
|
|
|
if b == 0 {
|
|
|
|
result = append(result, string(buf[off:i]))
|
|
|
|
off = i + 1
|
2017-11-20 06:10:04 +01:00
|
|
|
}
|
2018-07-07 06:18:14 +02:00
|
|
|
}
|
|
|
|
return result
|
|
|
|
}
|
|
|
|
|
|
|
|
func TestFaccessat(t *testing.T) {
|
|
|
|
defer chtmpdir(t)()
|
|
|
|
touch(t, "file1")
|
|
|
|
|
|
|
|
err := unix.Faccessat(unix.AT_FDCWD, "file1", unix.O_RDONLY, 0)
|
|
|
|
if err != nil {
|
|
|
|
t.Errorf("Faccessat: unexpected error: %v", err)
|
|
|
|
}
|
|
|
|
|
|
|
|
err = unix.Faccessat(unix.AT_FDCWD, "file1", unix.O_RDONLY, 2)
|
|
|
|
if err != unix.EINVAL {
|
|
|
|
t.Errorf("Faccessat: unexpected error: %v, want EINVAL", err)
|
|
|
|
}
|
|
|
|
|
|
|
|
err = unix.Faccessat(unix.AT_FDCWD, "file1", unix.O_RDONLY, unix.AT_EACCESS)
|
|
|
|
if err != unix.EOPNOTSUPP {
|
|
|
|
t.Errorf("Faccessat: unexpected error: %v, want EOPNOTSUPP", err)
|
|
|
|
}
|
|
|
|
|
|
|
|
err = os.Symlink("file1", "symlink1")
|
|
|
|
if err != nil {
|
|
|
|
t.Fatal(err)
|
|
|
|
}
|
|
|
|
|
|
|
|
err = unix.Faccessat(unix.AT_FDCWD, "symlink1", unix.O_RDONLY, unix.AT_SYMLINK_NOFOLLOW)
|
|
|
|
if err != unix.EOPNOTSUPP {
|
|
|
|
t.Errorf("Faccessat: unexpected error: %v, want EOPNOTSUPP", err)
|
2017-11-20 06:10:04 +01:00
|
|
|
}
|
|
|
|
}
|