| // 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. |
| |
| //go:build go1.7 |
| // +build go1.7 |
| |
| package unix_test |
| |
| import ( |
| "fmt" |
| "testing" |
| |
| "golang.org/x/sys/unix" |
| ) |
| |
| func TestDevices(t *testing.T) { |
| testCases := []struct { |
| path string |
| major uint32 |
| minor uint32 |
| }{ |
| // well known major/minor numbers according to |
| // https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/admin-guide/devices.txt |
| {"/dev/null", 1, 3}, |
| {"/dev/zero", 1, 5}, |
| {"/dev/random", 1, 8}, |
| {"/dev/full", 1, 7}, |
| {"/dev/urandom", 1, 9}, |
| {"/dev/tty", 5, 0}, |
| } |
| 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 { |
| if err == unix.EACCES { |
| t.Skip("no permission to stat device, skipping test") |
| } |
| 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) |
| } |
| }) |
| |
| } |
| } |