| // Copyright 2016 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // +build linux |
| |
| package unix_test |
| |
| import ( |
| "os" |
| "runtime" |
| "runtime/debug" |
| "testing" |
| "time" |
| |
| "golang.org/x/sys/unix" |
| ) |
| |
| func TestIoctlGetInt(t *testing.T) { |
| f, err := os.Open("/dev/random") |
| if err != nil { |
| t.Fatalf("failed to open device: %v", err) |
| } |
| defer f.Close() |
| |
| v, err := unix.IoctlGetInt(int(f.Fd()), unix.RNDGETENTCNT) |
| if err != nil { |
| t.Fatalf("failed to perform ioctl: %v", err) |
| } |
| |
| t.Logf("%d bits of entropy available", v) |
| } |
| |
| func TestPpoll(t *testing.T) { |
| if runtime.GOOS == "android" { |
| t.Skip("mkfifo syscall is not available on android, skipping test") |
| } |
| |
| f, cleanup := mktmpfifo(t) |
| defer cleanup() |
| |
| const timeout = 100 * time.Millisecond |
| |
| ok := make(chan bool, 1) |
| go func() { |
| select { |
| case <-time.After(10 * timeout): |
| t.Errorf("Ppoll: failed to timeout after %d", 10*timeout) |
| case <-ok: |
| } |
| }() |
| |
| fds := []unix.PollFd{{Fd: int32(f.Fd()), Events: unix.POLLIN}} |
| timeoutTs := unix.NsecToTimespec(int64(timeout)) |
| n, err := unix.Ppoll(fds, &timeoutTs, nil) |
| ok <- true |
| if err != nil { |
| t.Errorf("Ppoll: unexpected error: %v", err) |
| return |
| } |
| if n != 0 { |
| t.Errorf("Ppoll: wrong number of events: got %v, expected %v", n, 0) |
| return |
| } |
| } |
| |
| func TestTime(t *testing.T) { |
| var ut unix.Time_t |
| ut2, err := unix.Time(&ut) |
| if err != nil { |
| t.Fatalf("Time: %v", err) |
| } |
| if ut != ut2 { |
| t.Errorf("Time: return value %v should be equal to argument %v", ut2, ut) |
| } |
| |
| var now time.Time |
| |
| for i := 0; i < 10; i++ { |
| ut, err = unix.Time(nil) |
| if err != nil { |
| t.Fatalf("Time: %v", err) |
| } |
| |
| now = time.Now() |
| |
| if int64(ut) == now.Unix() { |
| return |
| } |
| } |
| |
| t.Errorf("Time: return value %v should be nearly equal to time.Now().Unix() %v", ut, now.Unix()) |
| } |
| |
| func TestUtime(t *testing.T) { |
| defer chtmpdir(t)() |
| |
| touch(t, "file1") |
| |
| buf := &unix.Utimbuf{ |
| Modtime: 12345, |
| } |
| |
| err := unix.Utime("file1", buf) |
| if err != nil { |
| t.Fatalf("Utime: %v", err) |
| } |
| |
| fi, err := os.Stat("file1") |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| if fi.ModTime().Unix() != 12345 { |
| t.Errorf("Utime: failed to change modtime: expected %v, got %v", 12345, fi.ModTime().Unix()) |
| } |
| } |
| |
| func TestUtimesNanoAt(t *testing.T) { |
| defer chtmpdir(t)() |
| |
| symlink := "symlink1" |
| os.Remove(symlink) |
| err := os.Symlink("nonexisting", symlink) |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| ts := []unix.Timespec{ |
| {Sec: 1111, Nsec: 2222}, |
| {Sec: 3333, Nsec: 4444}, |
| } |
| err = unix.UtimesNanoAt(unix.AT_FDCWD, symlink, ts, unix.AT_SYMLINK_NOFOLLOW) |
| if err != nil { |
| t.Fatalf("UtimesNanoAt: %v", err) |
| } |
| |
| var st unix.Stat_t |
| err = unix.Lstat(symlink, &st) |
| if err != nil { |
| t.Fatalf("Lstat: %v", err) |
| } |
| |
| // Only check Mtim, Atim might not be supported by the underlying filesystem |
| expected := ts[1] |
| if st.Mtim.Nsec == 0 { |
| // Some filesystems only support 1-second time stamp resolution |
| // and will always set Nsec to 0. |
| expected.Nsec = 0 |
| } |
| if st.Mtim != expected { |
| t.Errorf("UtimesNanoAt: wrong mtime: expected %v, got %v", expected, st.Mtim) |
| } |
| } |
| |
| func TestRlimitAs(t *testing.T) { |
| // disable GC during to avoid flaky test |
| defer debug.SetGCPercent(debug.SetGCPercent(-1)) |
| |
| var rlim unix.Rlimit |
| err := unix.Getrlimit(unix.RLIMIT_AS, &rlim) |
| if err != nil { |
| t.Fatalf("Getrlimit: %v", err) |
| } |
| var zero unix.Rlimit |
| if zero == rlim { |
| t.Fatalf("Getrlimit: got zero value %#v", rlim) |
| } |
| set := rlim |
| set.Cur = uint64(unix.Getpagesize()) |
| err = unix.Setrlimit(unix.RLIMIT_AS, &set) |
| if err != nil { |
| t.Fatalf("Setrlimit: set failed: %#v %v", set, err) |
| } |
| |
| // RLIMIT_AS was set to the page size, so mmap()'ing twice the page size |
| // should fail. See 'man 2 getrlimit'. |
| _, err = unix.Mmap(-1, 0, 2*unix.Getpagesize(), unix.PROT_NONE, unix.MAP_ANON|unix.MAP_PRIVATE) |
| if err == nil { |
| t.Fatal("Mmap: unexpectedly suceeded after setting RLIMIT_AS") |
| } |
| |
| err = unix.Setrlimit(unix.RLIMIT_AS, &rlim) |
| if err != nil { |
| t.Fatalf("Setrlimit: restore failed: %#v %v", rlim, err) |
| } |
| |
| b, err := unix.Mmap(-1, 0, 2*unix.Getpagesize(), unix.PROT_NONE, unix.MAP_ANON|unix.MAP_PRIVATE) |
| if err != nil { |
| t.Fatalf("Mmap: %v", err) |
| } |
| err = unix.Munmap(b) |
| if err != nil { |
| t.Fatalf("Munmap: %v", err) |
| } |
| } |
| |
| func TestSelect(t *testing.T) { |
| _, err := unix.Select(0, nil, nil, nil, &unix.Timeval{Sec: 0, Usec: 0}) |
| if err != nil { |
| t.Fatalf("Select: %v", err) |
| } |
| |
| dur := 150 * time.Millisecond |
| tv := unix.NsecToTimeval(int64(dur)) |
| start := time.Now() |
| _, err = unix.Select(0, nil, nil, nil, &tv) |
| took := time.Since(start) |
| if err != nil { |
| t.Fatalf("Select: %v", err) |
| } |
| |
| if took < dur { |
| t.Errorf("Select: timeout should have been at least %v, got %v", dur, took) |
| } |
| } |
| |
| func TestPselect(t *testing.T) { |
| _, err := unix.Pselect(0, nil, nil, nil, &unix.Timespec{Sec: 0, Nsec: 0}, nil) |
| if err != nil { |
| t.Fatalf("Pselect: %v", err) |
| } |
| |
| dur := 2500 * time.Microsecond |
| ts := unix.NsecToTimespec(int64(dur)) |
| start := time.Now() |
| _, err = unix.Pselect(0, nil, nil, nil, &ts, nil) |
| took := time.Since(start) |
| if err != nil { |
| t.Fatalf("Pselect: %v", err) |
| } |
| |
| if took < dur { |
| t.Errorf("Pselect: timeout should have been at least %v, got %v", dur, took) |
| } |
| } |
| |
| func TestSchedSetaffinity(t *testing.T) { |
| runtime.LockOSThread() |
| defer runtime.UnlockOSThread() |
| |
| var oldMask unix.CPUSet |
| err := unix.SchedGetaffinity(0, &oldMask) |
| if err != nil { |
| t.Fatalf("SchedGetaffinity: %v", err) |
| } |
| |
| var newMask unix.CPUSet |
| newMask.Zero() |
| if newMask.Count() != 0 { |
| t.Errorf("CpuZero: didn't zero CPU set: %v", newMask) |
| } |
| cpu := 1 |
| newMask.Set(cpu) |
| if newMask.Count() != 1 || !newMask.IsSet(cpu) { |
| t.Errorf("CpuSet: didn't set CPU %d in set: %v", cpu, newMask) |
| } |
| cpu = 5 |
| newMask.Set(cpu) |
| if newMask.Count() != 2 || !newMask.IsSet(cpu) { |
| t.Errorf("CpuSet: didn't set CPU %d in set: %v", cpu, newMask) |
| } |
| newMask.Clear(cpu) |
| if newMask.Count() != 1 || newMask.IsSet(cpu) { |
| t.Errorf("CpuClr: didn't clear CPU %d in set: %v", cpu, newMask) |
| } |
| |
| if runtime.NumCPU() < 2 { |
| t.Skip("skipping setaffinity tests on single CPU system") |
| } |
| if runtime.GOOS == "android" { |
| t.Skip("skipping setaffinity tests on android") |
| } |
| |
| err = unix.SchedSetaffinity(0, &newMask) |
| if err != nil { |
| t.Fatalf("SchedSetaffinity: %v", err) |
| } |
| |
| var gotMask unix.CPUSet |
| err = unix.SchedGetaffinity(0, &gotMask) |
| if err != nil { |
| t.Fatalf("SchedGetaffinity: %v", err) |
| } |
| |
| if gotMask != newMask { |
| t.Errorf("SchedSetaffinity: returned affinity mask does not match set affinity mask") |
| } |
| |
| // Restore old mask so it doesn't affect successive tests |
| err = unix.SchedSetaffinity(0, &oldMask) |
| if err != nil { |
| t.Fatalf("SchedSetaffinity: %v", err) |
| } |
| } |
| |
| func TestStatx(t *testing.T) { |
| var stx unix.Statx_t |
| err := unix.Statx(unix.AT_FDCWD, ".", 0, 0, &stx) |
| if err == unix.ENOSYS || err == unix.EPERM { |
| t.Skip("statx syscall is not available, skipping test") |
| } else if err != nil { |
| t.Fatalf("Statx: %v", err) |
| } |
| |
| defer chtmpdir(t)() |
| touch(t, "file1") |
| |
| var st unix.Stat_t |
| err = unix.Stat("file1", &st) |
| if err != nil { |
| t.Fatalf("Stat: %v", err) |
| } |
| |
| flags := unix.AT_STATX_SYNC_AS_STAT |
| err = unix.Statx(unix.AT_FDCWD, "file1", flags, unix.STATX_ALL, &stx) |
| if err != nil { |
| t.Fatalf("Statx: %v", err) |
| } |
| |
| if uint32(stx.Mode) != st.Mode { |
| t.Errorf("Statx: returned stat mode does not match Stat") |
| } |
| |
| 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 Stat") |
| } |
| if stx.Mtime != mtime { |
| t.Errorf("Statx: returned stat mtime does not match Stat") |
| } |
| |
| err = os.Symlink("file1", "symlink1") |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| err = unix.Lstat("symlink1", &st) |
| if err != nil { |
| 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") |
| } |
| |
| err = unix.Statx(unix.AT_FDCWD, "symlink1", flags|unix.AT_SYMLINK_NOFOLLOW, unix.STATX_ALL, &stx) |
| if err != nil { |
| 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") |
| } |
| if stx.Mtime != mtime { |
| t.Errorf("Statx: returned stat mtime does not match Lstat") |
| } |
| } |
| |
| // 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 |
| } |
| } |
| return result |
| } |
| |
| func TestFaccessat(t *testing.T) { |
| defer chtmpdir(t)() |
| touch(t, "file1") |
| |
| err := unix.Faccessat(unix.AT_FDCWD, "file1", unix.R_OK, 0) |
| if err != nil { |
| t.Errorf("Faccessat: unexpected error: %v", err) |
| } |
| |
| err = unix.Faccessat(unix.AT_FDCWD, "file1", unix.R_OK, 2) |
| if err != unix.EINVAL { |
| t.Errorf("Faccessat: unexpected error: %v, want EINVAL", err) |
| } |
| |
| err = unix.Faccessat(unix.AT_FDCWD, "file1", unix.R_OK, unix.AT_EACCESS) |
| if err != nil { |
| t.Errorf("Faccessat: unexpected error: %v", err) |
| } |
| |
| err = os.Symlink("file1", "symlink1") |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| err = unix.Faccessat(unix.AT_FDCWD, "symlink1", unix.R_OK, unix.AT_SYMLINK_NOFOLLOW) |
| if err != nil { |
| t.Errorf("Faccessat SYMLINK_NOFOLLOW: unexpected error %v", err) |
| } |
| |
| // We can't really test AT_SYMLINK_NOFOLLOW, because there |
| // doesn't seem to be any way to change the mode of a symlink. |
| // We don't test AT_EACCESS because such tests are only |
| // meaningful if run as root. |
| |
| err = unix.Fchmodat(unix.AT_FDCWD, "file1", 0, 0) |
| if err != nil { |
| t.Errorf("Fchmodat: unexpected error %v", err) |
| } |
| |
| err = unix.Faccessat(unix.AT_FDCWD, "file1", unix.F_OK, unix.AT_SYMLINK_NOFOLLOW) |
| if err != nil { |
| t.Errorf("Faccessat: unexpected error: %v", err) |
| } |
| |
| err = unix.Faccessat(unix.AT_FDCWD, "file1", unix.R_OK, unix.AT_SYMLINK_NOFOLLOW) |
| if err != unix.EACCES { |
| if unix.Getuid() != 0 { |
| t.Errorf("Faccessat: unexpected error: %v, want EACCES", err) |
| } |
| } |
| } |