github.com/dolotech/hongbao@v0.0.0-20191130105438-fd59d7a5dda5/src/golang.org/x/sys/unix/dev_dragonfly_test.go (about)

     1  // Copyright 2017 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  package unix_test
     6  
     7  import (
     8  	"fmt"
     9  	"testing"
    10  
    11  	"golang.org/x/sys/unix"
    12  )
    13  
    14  func TestDevices(t *testing.T) {
    15  	testCases := []struct {
    16  		path  string
    17  		major uint32
    18  		minor uint32
    19  	}{
    20  		// Minor is a cookie instead of an index on DragonFlyBSD
    21  		{"/dev/null", 10, 0x00000002},
    22  		{"/dev/random", 10, 0x00000003},
    23  		{"/dev/urandom", 10, 0x00000004},
    24  		{"/dev/zero", 10, 0x0000000c},
    25  		{"/dev/bpf", 15, 0xffff00ff},
    26  	}
    27  	for _, tc := range testCases {
    28  		t.Run(fmt.Sprintf("%s %v:%v", tc.path, tc.major, tc.minor), func(t *testing.T) {
    29  			var stat unix.Stat_t
    30  			err := unix.Stat(tc.path, &stat)
    31  			if err != nil {
    32  				t.Errorf("failed to stat device: %v", err)
    33  				return
    34  			}
    35  
    36  			dev := uint64(stat.Rdev)
    37  			if unix.Major(dev) != tc.major {
    38  				t.Errorf("for %s Major(%#x) == %d, want %d", tc.path, dev, unix.Major(dev), tc.major)
    39  			}
    40  			if unix.Minor(dev) != tc.minor {
    41  				t.Errorf("for %s Minor(%#x) == %d, want %d", tc.path, dev, unix.Minor(dev), tc.minor)
    42  			}
    43  			if unix.Mkdev(tc.major, tc.minor) != dev {
    44  				t.Errorf("for %s Mkdev(%d, %d) == %#x, want %#x", tc.path, tc.major, tc.minor, unix.Mkdev(tc.major, tc.minor), dev)
    45  			}
    46  		})
    47  	}
    48  }