github.com/Andyfoo/golang/x/sys@v0.0.0-20190901054642-57c1bf301704/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  	"github.com/Andyfoo/golang/x/sys/unix"
    16  )
    17  
    18  func TestGetfsstat(t *testing.T) {
    19  	n, err := unix.Getfsstat(nil, unix.MNT_NOWAIT)
    20  	if err != nil {
    21  		t.Fatal(err)
    22  	}
    23  
    24  	data := make([]unix.Statfs_t, n)
    25  	n2, err := unix.Getfsstat(data, unix.MNT_NOWAIT)
    26  	if err != nil {
    27  		t.Fatal(err)
    28  	}
    29  	if n != n2 {
    30  		t.Errorf("Getfsstat(nil) = %d, but subsequent Getfsstat(slice) = %d", n, n2)
    31  	}
    32  	for i, stat := range data {
    33  		if stat == (unix.Statfs_t{}) {
    34  			t.Errorf("index %v is an empty Statfs_t struct", i)
    35  		}
    36  	}
    37  	if t.Failed() {
    38  		for i, stat := range data[:n2] {
    39  			t.Logf("data[%v] = %+v", i, stat)
    40  		}
    41  		mount, err := exec.Command("mount").CombinedOutput()
    42  		if err != nil {
    43  			t.Logf("mount: %v\n%s", err, mount)
    44  		} else {
    45  			t.Logf("mount: %s", mount)
    46  		}
    47  	}
    48  }
    49  
    50  func TestSelect(t *testing.T) {
    51  	err := unix.Select(0, nil, nil, nil, &unix.Timeval{Sec: 0, Usec: 0})
    52  	if err != nil {
    53  		t.Fatalf("Select: %v", err)
    54  	}
    55  
    56  	dur := 250 * time.Millisecond
    57  	tv := unix.NsecToTimeval(int64(dur))
    58  	start := time.Now()
    59  	err = unix.Select(0, nil, nil, nil, &tv)
    60  	took := time.Since(start)
    61  	if err != nil {
    62  		t.Fatalf("Select: %v", err)
    63  	}
    64  
    65  	// On some BSDs the actual timeout might also be slightly less than the requested.
    66  	// Add an acceptable margin to avoid flaky tests.
    67  	if took < dur*2/3 {
    68  		t.Errorf("Select: timeout should have been at least %v, got %v", dur, took)
    69  	}
    70  }
    71  
    72  func TestSysctlRaw(t *testing.T) {
    73  	if runtime.GOOS == "openbsd" {
    74  		t.Skip("kern.proc.pid does not exist on OpenBSD")
    75  	}
    76  
    77  	_, err := unix.SysctlRaw("kern.proc.pid", unix.Getpid())
    78  	if err != nil {
    79  		t.Fatal(err)
    80  	}
    81  }
    82  
    83  func TestSysctlUint32(t *testing.T) {
    84  	maxproc, err := unix.SysctlUint32("kern.maxproc")
    85  	if err != nil {
    86  		t.Fatal(err)
    87  	}
    88  	t.Logf("kern.maxproc: %v", maxproc)
    89  }