mirror of
https://github.com/genuinetools/reg.git
synced 2024-09-19 16:51:01 -04:00
fa2c3fedcc
Signed-off-by: Jess Frazelle <acidburn@microsoft.com>
639 lines
15 KiB
Go
639 lines
15 KiB
Go
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin dragonfly freebsd linux netbsd openbsd solaris
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package unix_test
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import (
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"flag"
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"os/exec"
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"path/filepath"
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"runtime"
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"syscall"
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"testing"
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"time"
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"golang.org/x/sys/unix"
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)
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// Tests that below functions, structures and constants are consistent
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// on all Unix-like systems.
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func _() {
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// program scheduling priority functions and constants
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var (
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_ func(int, int, int) error = unix.Setpriority
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_ func(int, int) (int, error) = unix.Getpriority
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)
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const (
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_ int = unix.PRIO_USER
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_ int = unix.PRIO_PROCESS
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_ int = unix.PRIO_PGRP
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)
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// termios constants
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const (
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_ int = unix.TCIFLUSH
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_ int = unix.TCIOFLUSH
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_ int = unix.TCOFLUSH
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)
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// fcntl file locking structure and constants
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var (
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_ = unix.Flock_t{
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Type: int16(0),
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Whence: int16(0),
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Start: int64(0),
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Len: int64(0),
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Pid: int32(0),
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}
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)
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const (
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_ = unix.F_GETLK
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_ = unix.F_SETLK
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_ = unix.F_SETLKW
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)
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}
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func TestErrnoSignalName(t *testing.T) {
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testErrors := []struct {
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num syscall.Errno
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name string
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}{
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{syscall.EPERM, "EPERM"},
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{syscall.EINVAL, "EINVAL"},
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{syscall.ENOENT, "ENOENT"},
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}
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for _, te := range testErrors {
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t.Run(fmt.Sprintf("%d/%s", te.num, te.name), func(t *testing.T) {
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e := unix.ErrnoName(te.num)
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if e != te.name {
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t.Errorf("ErrnoName(%d) returned %s, want %s", te.num, e, te.name)
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}
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})
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}
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testSignals := []struct {
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num syscall.Signal
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name string
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}{
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{syscall.SIGHUP, "SIGHUP"},
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{syscall.SIGPIPE, "SIGPIPE"},
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{syscall.SIGSEGV, "SIGSEGV"},
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}
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for _, ts := range testSignals {
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t.Run(fmt.Sprintf("%d/%s", ts.num, ts.name), func(t *testing.T) {
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s := unix.SignalName(ts.num)
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if s != ts.name {
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t.Errorf("SignalName(%d) returned %s, want %s", ts.num, s, ts.name)
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}
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})
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}
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}
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// TestFcntlFlock tests whether the file locking structure matches
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// the calling convention of each kernel.
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func TestFcntlFlock(t *testing.T) {
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name := filepath.Join(os.TempDir(), "TestFcntlFlock")
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fd, err := unix.Open(name, unix.O_CREAT|unix.O_RDWR|unix.O_CLOEXEC, 0)
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if err != nil {
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t.Fatalf("Open failed: %v", err)
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}
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defer unix.Unlink(name)
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defer unix.Close(fd)
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flock := unix.Flock_t{
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Type: unix.F_RDLCK,
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Start: 0, Len: 0, Whence: 1,
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}
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if err := unix.FcntlFlock(uintptr(fd), unix.F_GETLK, &flock); err != nil {
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t.Fatalf("FcntlFlock failed: %v", err)
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}
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}
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// TestPassFD tests passing a file descriptor over a Unix socket.
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//
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// This test involved both a parent and child process. The parent
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// process is invoked as a normal test, with "go test", which then
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// runs the child process by running the current test binary with args
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// "-test.run=^TestPassFD$" and an environment variable used to signal
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// that the test should become the child process instead.
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func TestPassFD(t *testing.T) {
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if runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64") {
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t.Skip("cannot exec subprocess on iOS, skipping test")
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}
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if os.Getenv("GO_WANT_HELPER_PROCESS") == "1" {
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passFDChild()
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return
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}
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tempDir, err := ioutil.TempDir("", "TestPassFD")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(tempDir)
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fds, err := unix.Socketpair(unix.AF_LOCAL, unix.SOCK_STREAM, 0)
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if err != nil {
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t.Fatalf("Socketpair: %v", err)
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}
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defer unix.Close(fds[0])
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defer unix.Close(fds[1])
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writeFile := os.NewFile(uintptr(fds[0]), "child-writes")
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readFile := os.NewFile(uintptr(fds[1]), "parent-reads")
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defer writeFile.Close()
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defer readFile.Close()
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cmd := exec.Command(os.Args[0], "-test.run=^TestPassFD$", "--", tempDir)
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cmd.Env = []string{"GO_WANT_HELPER_PROCESS=1"}
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if lp := os.Getenv("LD_LIBRARY_PATH"); lp != "" {
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cmd.Env = append(cmd.Env, "LD_LIBRARY_PATH="+lp)
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}
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cmd.ExtraFiles = []*os.File{writeFile}
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out, err := cmd.CombinedOutput()
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if len(out) > 0 || err != nil {
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t.Fatalf("child process: %q, %v", out, err)
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}
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c, err := net.FileConn(readFile)
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if err != nil {
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t.Fatalf("FileConn: %v", err)
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}
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defer c.Close()
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uc, ok := c.(*net.UnixConn)
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if !ok {
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t.Fatalf("unexpected FileConn type; expected UnixConn, got %T", c)
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}
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buf := make([]byte, 32) // expect 1 byte
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oob := make([]byte, 32) // expect 24 bytes
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closeUnix := time.AfterFunc(5*time.Second, func() {
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t.Logf("timeout reading from unix socket")
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uc.Close()
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})
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_, oobn, _, _, err := uc.ReadMsgUnix(buf, oob)
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if err != nil {
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t.Fatalf("ReadMsgUnix: %v", err)
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}
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closeUnix.Stop()
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scms, err := unix.ParseSocketControlMessage(oob[:oobn])
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if err != nil {
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t.Fatalf("ParseSocketControlMessage: %v", err)
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}
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if len(scms) != 1 {
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t.Fatalf("expected 1 SocketControlMessage; got scms = %#v", scms)
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}
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scm := scms[0]
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gotFds, err := unix.ParseUnixRights(&scm)
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if err != nil {
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t.Fatalf("unix.ParseUnixRights: %v", err)
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}
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if len(gotFds) != 1 {
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t.Fatalf("wanted 1 fd; got %#v", gotFds)
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}
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f := os.NewFile(uintptr(gotFds[0]), "fd-from-child")
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defer f.Close()
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got, err := ioutil.ReadAll(f)
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want := "Hello from child process!\n"
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if string(got) != want {
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t.Errorf("child process ReadAll: %q, %v; want %q", got, err, want)
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}
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}
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// passFDChild is the child process used by TestPassFD.
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func passFDChild() {
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defer os.Exit(0)
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// Look for our fd. It should be fd 3, but we work around an fd leak
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// bug here (http://golang.org/issue/2603) to let it be elsewhere.
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var uc *net.UnixConn
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for fd := uintptr(3); fd <= 10; fd++ {
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f := os.NewFile(fd, "unix-conn")
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var ok bool
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netc, _ := net.FileConn(f)
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uc, ok = netc.(*net.UnixConn)
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if ok {
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break
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}
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}
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if uc == nil {
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fmt.Println("failed to find unix fd")
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return
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}
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// Make a file f to send to our parent process on uc.
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// We make it in tempDir, which our parent will clean up.
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flag.Parse()
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tempDir := flag.Arg(0)
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f, err := ioutil.TempFile(tempDir, "")
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if err != nil {
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fmt.Printf("TempFile: %v", err)
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return
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}
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f.Write([]byte("Hello from child process!\n"))
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f.Seek(0, 0)
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rights := unix.UnixRights(int(f.Fd()))
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dummyByte := []byte("x")
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n, oobn, err := uc.WriteMsgUnix(dummyByte, rights, nil)
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if err != nil {
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fmt.Printf("WriteMsgUnix: %v", err)
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return
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}
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if n != 1 || oobn != len(rights) {
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fmt.Printf("WriteMsgUnix = %d, %d; want 1, %d", n, oobn, len(rights))
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return
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}
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}
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// TestUnixRightsRoundtrip tests that UnixRights, ParseSocketControlMessage,
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// and ParseUnixRights are able to successfully round-trip lists of file descriptors.
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func TestUnixRightsRoundtrip(t *testing.T) {
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testCases := [...][][]int{
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{{42}},
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{{1, 2}},
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{{3, 4, 5}},
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{{}},
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{{1, 2}, {3, 4, 5}, {}, {7}},
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}
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for _, testCase := range testCases {
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b := []byte{}
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var n int
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for _, fds := range testCase {
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// Last assignment to n wins
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n = len(b) + unix.CmsgLen(4*len(fds))
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b = append(b, unix.UnixRights(fds...)...)
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}
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// Truncate b
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b = b[:n]
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scms, err := unix.ParseSocketControlMessage(b)
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if err != nil {
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t.Fatalf("ParseSocketControlMessage: %v", err)
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}
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if len(scms) != len(testCase) {
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t.Fatalf("expected %v SocketControlMessage; got scms = %#v", len(testCase), scms)
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}
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for i, scm := range scms {
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gotFds, err := unix.ParseUnixRights(&scm)
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if err != nil {
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t.Fatalf("ParseUnixRights: %v", err)
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}
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wantFds := testCase[i]
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if len(gotFds) != len(wantFds) {
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t.Fatalf("expected %v fds, got %#v", len(wantFds), gotFds)
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}
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for j, fd := range gotFds {
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if fd != wantFds[j] {
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t.Fatalf("expected fd %v, got %v", wantFds[j], fd)
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}
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}
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}
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}
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}
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func TestRlimit(t *testing.T) {
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var rlimit, zero unix.Rlimit
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err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlimit)
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if err != nil {
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t.Fatalf("Getrlimit: save failed: %v", err)
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}
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if zero == rlimit {
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t.Fatalf("Getrlimit: save failed: got zero value %#v", rlimit)
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}
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set := rlimit
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set.Cur = set.Max - 1
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err = unix.Setrlimit(unix.RLIMIT_NOFILE, &set)
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if err != nil {
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t.Fatalf("Setrlimit: set failed: %#v %v", set, err)
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}
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var get unix.Rlimit
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err = unix.Getrlimit(unix.RLIMIT_NOFILE, &get)
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if err != nil {
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t.Fatalf("Getrlimit: get failed: %v", err)
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}
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set = rlimit
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set.Cur = set.Max - 1
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if set != get {
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// Seems like Darwin requires some privilege to
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// increase the soft limit of rlimit sandbox, though
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// Setrlimit never reports an error.
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switch runtime.GOOS {
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case "darwin":
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default:
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t.Fatalf("Rlimit: change failed: wanted %#v got %#v", set, get)
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}
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}
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err = unix.Setrlimit(unix.RLIMIT_NOFILE, &rlimit)
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if err != nil {
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t.Fatalf("Setrlimit: restore failed: %#v %v", rlimit, err)
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}
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}
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func TestSeekFailure(t *testing.T) {
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_, err := unix.Seek(-1, 0, 0)
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if err == nil {
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t.Fatalf("Seek(-1, 0, 0) did not fail")
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}
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str := err.Error() // used to crash on Linux
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t.Logf("Seek: %v", str)
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if str == "" {
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t.Fatalf("Seek(-1, 0, 0) return error with empty message")
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}
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}
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func TestDup(t *testing.T) {
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file, err := ioutil.TempFile("", "TestDup")
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if err != nil {
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t.Fatalf("Tempfile failed: %v", err)
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}
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defer os.Remove(file.Name())
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defer file.Close()
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f := int(file.Fd())
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newFd, err := unix.Dup(f)
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if err != nil {
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t.Fatalf("Dup: %v", err)
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}
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err = unix.Dup2(newFd, newFd+1)
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if err != nil {
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t.Fatalf("Dup2: %v", err)
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}
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b1 := []byte("Test123")
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b2 := make([]byte, 7)
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_, err = unix.Write(newFd+1, b1)
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if err != nil {
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t.Fatalf("Write to dup2 fd failed: %v", err)
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}
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_, err = unix.Seek(f, 0, 0)
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if err != nil {
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t.Fatalf("Seek failed: %v", err)
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}
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_, err = unix.Read(f, b2)
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if err != nil {
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t.Fatalf("Read back failed: %v", err)
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}
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if string(b1) != string(b2) {
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t.Errorf("Dup: stdout write not in file, expected %v, got %v", string(b1), string(b2))
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}
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}
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func TestPoll(t *testing.T) {
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if runtime.GOOS == "android" ||
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(runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64")) {
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t.Skip("mkfifo syscall is not available on android and iOS, skipping test")
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}
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f, cleanup := mktmpfifo(t)
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defer cleanup()
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const timeout = 100
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ok := make(chan bool, 1)
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go func() {
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select {
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case <-time.After(10 * timeout * time.Millisecond):
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t.Errorf("Poll: failed to timeout after %d milliseconds", 10*timeout)
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case <-ok:
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}
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}()
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fds := []unix.PollFd{{Fd: int32(f.Fd()), Events: unix.POLLIN}}
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n, err := unix.Poll(fds, timeout)
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ok <- true
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if err != nil {
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t.Errorf("Poll: unexpected error: %v", err)
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return
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}
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if n != 0 {
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t.Errorf("Poll: wrong number of events: got %v, expected %v", n, 0)
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return
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}
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}
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func TestGetwd(t *testing.T) {
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fd, err := os.Open(".")
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if err != nil {
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t.Fatalf("Open .: %s", err)
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}
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defer fd.Close()
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// These are chosen carefully not to be symlinks on a Mac
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// (unlike, say, /var, /etc)
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dirs := []string{"/", "/usr/bin"}
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switch runtime.GOOS {
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case "android":
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dirs = []string{"/", "/system/bin"}
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case "darwin":
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switch runtime.GOARCH {
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case "arm", "arm64":
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d1, err := ioutil.TempDir("", "d1")
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if err != nil {
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t.Fatalf("TempDir: %v", err)
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}
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d2, err := ioutil.TempDir("", "d2")
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if err != nil {
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t.Fatalf("TempDir: %v", err)
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}
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dirs = []string{d1, d2}
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}
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}
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oldwd := os.Getenv("PWD")
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for _, d := range dirs {
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err = os.Chdir(d)
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if err != nil {
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t.Fatalf("Chdir: %v", err)
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}
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pwd, err := unix.Getwd()
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if err != nil {
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t.Fatalf("Getwd in %s: %s", d, err)
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}
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os.Setenv("PWD", oldwd)
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err = fd.Chdir()
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if err != nil {
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// We changed the current directory and cannot go back.
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// Don't let the tests continue; they'll scribble
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// all over some other directory.
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fmt.Fprintf(os.Stderr, "fchdir back to dot failed: %s\n", err)
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os.Exit(1)
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}
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if pwd != d {
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t.Fatalf("Getwd returned %q want %q", pwd, d)
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}
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}
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}
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func TestFstatat(t *testing.T) {
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defer chtmpdir(t)()
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touch(t, "file1")
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var st1 unix.Stat_t
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err := unix.Stat("file1", &st1)
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if err != nil {
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t.Fatalf("Stat: %v", err)
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}
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var st2 unix.Stat_t
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err = unix.Fstatat(unix.AT_FDCWD, "file1", &st2, 0)
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if err != nil {
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t.Fatalf("Fstatat: %v", err)
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}
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if st1 != st2 {
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t.Errorf("Fstatat: returned stat does not match Stat")
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}
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err = os.Symlink("file1", "symlink1")
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if err != nil {
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t.Fatal(err)
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}
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|
|
err = unix.Lstat("symlink1", &st1)
|
|
if err != nil {
|
|
t.Fatalf("Lstat: %v", err)
|
|
}
|
|
|
|
err = unix.Fstatat(unix.AT_FDCWD, "symlink1", &st2, unix.AT_SYMLINK_NOFOLLOW)
|
|
if err != nil {
|
|
t.Fatalf("Fstatat: %v", err)
|
|
}
|
|
|
|
if st1 != st2 {
|
|
t.Errorf("Fstatat: returned stat does not match Lstat")
|
|
}
|
|
}
|
|
|
|
func TestFchmodat(t *testing.T) {
|
|
defer chtmpdir(t)()
|
|
|
|
touch(t, "file1")
|
|
err := os.Symlink("file1", "symlink1")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
mode := os.FileMode(0444)
|
|
err = unix.Fchmodat(unix.AT_FDCWD, "symlink1", uint32(mode), 0)
|
|
if err != nil {
|
|
t.Fatalf("Fchmodat: unexpected error: %v", err)
|
|
}
|
|
|
|
fi, err := os.Stat("file1")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if fi.Mode() != mode {
|
|
t.Errorf("Fchmodat: failed to change file mode: expected %v, got %v", mode, fi.Mode())
|
|
}
|
|
|
|
mode = os.FileMode(0644)
|
|
didChmodSymlink := true
|
|
err = unix.Fchmodat(unix.AT_FDCWD, "symlink1", uint32(mode), unix.AT_SYMLINK_NOFOLLOW)
|
|
if err != nil {
|
|
if (runtime.GOOS == "android" || runtime.GOOS == "linux" || runtime.GOOS == "solaris") && err == unix.EOPNOTSUPP {
|
|
// Linux and Illumos don't support flags != 0
|
|
didChmodSymlink = false
|
|
} else {
|
|
t.Fatalf("Fchmodat: unexpected error: %v", err)
|
|
}
|
|
}
|
|
|
|
if !didChmodSymlink {
|
|
// Didn't change mode of the symlink. On Linux, the permissions
|
|
// of a symbolic link are always 0777 according to symlink(7)
|
|
mode = os.FileMode(0777)
|
|
}
|
|
|
|
var st unix.Stat_t
|
|
err = unix.Lstat("symlink1", &st)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
got := os.FileMode(st.Mode & 0777)
|
|
if got != mode {
|
|
t.Errorf("Fchmodat: failed to change symlink mode: expected %v, got %v", mode, got)
|
|
}
|
|
}
|
|
|
|
func TestMkdev(t *testing.T) {
|
|
major := uint32(42)
|
|
minor := uint32(7)
|
|
dev := unix.Mkdev(major, minor)
|
|
|
|
if unix.Major(dev) != major {
|
|
t.Errorf("Major(%#x) == %d, want %d", dev, unix.Major(dev), major)
|
|
}
|
|
if unix.Minor(dev) != minor {
|
|
t.Errorf("Minor(%#x) == %d, want %d", dev, unix.Minor(dev), minor)
|
|
}
|
|
}
|
|
|
|
// mktmpfifo creates a temporary FIFO and provides a cleanup function.
|
|
func mktmpfifo(t *testing.T) (*os.File, func()) {
|
|
err := unix.Mkfifo("fifo", 0666)
|
|
if err != nil {
|
|
t.Fatalf("mktmpfifo: failed to create FIFO: %v", err)
|
|
}
|
|
|
|
f, err := os.OpenFile("fifo", os.O_RDWR, 0666)
|
|
if err != nil {
|
|
os.Remove("fifo")
|
|
t.Fatalf("mktmpfifo: failed to open FIFO: %v", err)
|
|
}
|
|
|
|
return f, func() {
|
|
f.Close()
|
|
os.Remove("fifo")
|
|
}
|
|
}
|
|
|
|
// utilities taken from os/os_test.go
|
|
|
|
func touch(t *testing.T, name string) {
|
|
f, err := os.Create(name)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := f.Close(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
// chtmpdir changes the working directory to a new temporary directory and
|
|
// provides a cleanup function. Used when PWD is read-only.
|
|
func chtmpdir(t *testing.T) func() {
|
|
oldwd, err := os.Getwd()
|
|
if err != nil {
|
|
t.Fatalf("chtmpdir: %v", err)
|
|
}
|
|
d, err := ioutil.TempDir("", "test")
|
|
if err != nil {
|
|
t.Fatalf("chtmpdir: %v", err)
|
|
}
|
|
if err := os.Chdir(d); err != nil {
|
|
t.Fatalf("chtmpdir: %v", err)
|
|
}
|
|
return func() {
|
|
if err := os.Chdir(oldwd); err != nil {
|
|
t.Fatalf("chtmpdir: %v", err)
|
|
}
|
|
os.RemoveAll(d)
|
|
}
|
|
}
|