github.com/alexis81/domosgo@v0.0.0-20191016125037-5aee90a434af/Domos/src/golang.org/x/sys/unix/syscall_bsd_test.go (about)

     1  // Copyright 2014 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // +build darwin dragonfly freebsd openbsd
     6  
     7  package unix_test
     8  
     9  import (
    10  	"os/exec"
    11  	"runtime"
    12  	"testing"
    13  	"time"
    14  
    15  	"golang.org/x/sys/unix"
    16  )
    17  
    18  const MNT_WAIT = 1
    19  const MNT_NOWAIT = 2
    20  
    21  func TestGetfsstat(t *testing.T) {
    22  	const flags = MNT_NOWAIT // see golang.org/issue/16937
    23  	n, err := unix.Getfsstat(nil, flags)
    24  	if err != nil {
    25  		t.Fatal(err)
    26  	}
    27  
    28  	data := make([]unix.Statfs_t, n)
    29  	n2, err := unix.Getfsstat(data, flags)
    30  	if err != nil {
    31  		t.Fatal(err)
    32  	}
    33  	if n != n2 {
    34  		t.Errorf("Getfsstat(nil) = %d, but subsequent Getfsstat(slice) = %d", n, n2)
    35  	}
    36  	for i, stat := range data {
    37  		if stat == (unix.Statfs_t{}) {
    38  			t.Errorf("index %v is an empty Statfs_t struct", i)
    39  		}
    40  	}
    41  	if t.Failed() {
    42  		for i, stat := range data[:n2] {
    43  			t.Logf("data[%v] = %+v", i, stat)
    44  		}
    45  		mount, err := exec.Command("mount").CombinedOutput()
    46  		if err != nil {
    47  			t.Logf("mount: %v\n%s", err, mount)
    48  		} else {
    49  			t.Logf("mount: %s", mount)
    50  		}
    51  	}
    52  }
    53  
    54  func TestSelect(t *testing.T) {
    55  	err := unix.Select(0, nil, nil, nil, &unix.Timeval{Sec: 0, Usec: 0})
    56  	if err != nil {
    57  		t.Fatalf("Select: %v", err)
    58  	}
    59  
    60  	dur := 250 * time.Millisecond
    61  	tv := unix.NsecToTimeval(int64(dur))
    62  	start := time.Now()
    63  	err = unix.Select(0, nil, nil, nil, &tv)
    64  	took := time.Since(start)
    65  	if err != nil {
    66  		t.Fatalf("Select: %v", err)
    67  	}
    68  
    69  	// On some BSDs the actual timeout might also be slightly less than the requested.
    70  	// Add an acceptable margin to avoid flaky tests.
    71  	if took < dur*2/3 {
    72  		t.Errorf("Select: timeout should have been at least %v, got %v", dur, took)
    73  	}
    74  }
    75  
    76  func TestSysctlRaw(t *testing.T) {
    77  	if runtime.GOOS == "openbsd" {
    78  		t.Skip("kern.proc.pid does not exist on OpenBSD")
    79  	}
    80  
    81  	_, err := unix.SysctlRaw("kern.proc.pid", unix.Getpid())
    82  	if err != nil {
    83  		t.Fatal(err)
    84  	}
    85  }
    86  
    87  func TestSysctlUint32(t *testing.T) {
    88  	maxproc, err := unix.SysctlUint32("kern.maxproc")
    89  	if err != nil {
    90  		t.Fatal(err)
    91  	}
    92  	t.Logf("kern.maxproc: %v", maxproc)
    93  }