// Copyright 2017 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. package unix_test import ( "fmt" "testing" "golang.org/x/sys/unix" ) func TestDevices(t *testing.T) { testCases := []struct { path string major uint32 minor uint32 }{ // Most of the device major/minor numbers on Darwin are // dynamically generated by devfs. These are some well-known // static numbers. {"/dev/ttyp0", 4, 0}, {"/dev/ttys0", 4, 48}, {"/dev/ptyp0", 5, 0}, {"/dev/ptyr0", 5, 32}, } for _, tc := range testCases { t.Run(fmt.Sprintf("%s %v:%v", tc.path, tc.major, tc.minor), func(t *testing.T) { var stat unix.Stat_t err := unix.Stat(tc.path, &stat) if err != nil { t.Errorf("failed to stat device: %v", err) return } dev := uint64(stat.Rdev) if unix.Major(dev) != tc.major { t.Errorf("for %s Major(%#x) == %d, want %d", tc.path, dev, unix.Major(dev), tc.major) } if unix.Minor(dev) != tc.minor { t.Errorf("for %s Minor(%#x) == %d, want %d", tc.path, dev, unix.Minor(dev), tc.minor) } if unix.Mkdev(tc.major, tc.minor) != dev { t.Errorf("for %s Mkdev(%d, %d) == %#x, want %#x", tc.path, tc.major, tc.minor, unix.Mkdev(tc.major, tc.minor), dev) } }) } }