github.com/nibnait/go-learn@v0.0.0-20220227013611-dfa47ea6d2da/src/pkg/mod/golang.org/x/sys@v0.0.0-20210630005230-0f9fa26af87c/unix/dev_zos_test.go (about) 1 // Copyright 2020 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 //go:build zos && s390x 6 // +build zos,s390x 7 8 package unix_test 9 10 // Modified from Linux tests for device numbers. 11 12 import ( 13 "fmt" 14 "testing" 15 16 "golang.org/x/sys/unix" 17 ) 18 19 func TestDevices(t *testing.T) { 20 testCases := []struct { 21 path string 22 major uint32 23 minor uint32 24 }{ 25 // Device nums found using ls -l on z/OS 26 {"/dev/null", 4, 0}, 27 {"/dev/zero", 4, 1}, 28 {"/dev/random", 4, 2}, 29 {"/dev/urandom", 4, 2}, 30 {"/dev/tty", 3, 0}, 31 } 32 for _, tc := range testCases { 33 t.Run(fmt.Sprintf("%s %v:%v", tc.path, tc.major, tc.minor), func(t *testing.T) { 34 var stat unix.Stat_t 35 err := unix.Stat(tc.path, &stat) 36 if err != nil { 37 if err == unix.EACCES { 38 t.Skip("no permission to stat device, skipping test") 39 } 40 t.Errorf("failed to stat device: %v", err) 41 return 42 } 43 44 dev := uint64(stat.Rdev) 45 if unix.Major(dev) != tc.major { 46 t.Errorf("for %s Major(%#x) == %d, want %d", tc.path, dev, unix.Major(dev), tc.major) 47 } 48 if unix.Minor(dev) != tc.minor { 49 t.Errorf("for %s Minor(%#x) == %d, want %d", tc.path, dev, unix.Minor(dev), tc.minor) 50 } 51 if unix.Mkdev(tc.major, tc.minor) != dev { 52 t.Errorf("for %s Mkdev(%d, %d) == %#x, want %#x", tc.path, tc.major, tc.minor, unix.Mkdev(tc.major, tc.minor), dev) 53 } 54 }) 55 56 } 57 }