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unix: create wrappers for solaris/illumos Event Ports
This work is in support of a cleanup of fsnotify/fsnotify#263 Change-Id: Ibd7500d20322765bfd50aa18333eb43ee7b659d7 Reviewed-on: https://go-review.googlesource.com/c/sys/+/324630 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
This commit is contained in:
Nahum Shalman
committed by
Tobias Klauser
Tobias Klauser
parent
1e6c022a89
commit
13f9c583af
@@ -8,7 +8,11 @@
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package unix_test
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import (
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"runtime"
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"testing"
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"golang.org/x/sys/unix"
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@@ -41,3 +45,290 @@ func TestSysconf(t *testing.T) {
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}
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t.Logf("Sysconf(SC_CLK_TCK) = %d", n)
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}
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// Event Ports
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func TestBasicEventPort(t *testing.T) {
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tmpfile, err := ioutil.TempFile("", "eventport")
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if err != nil {
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t.Fatalf("unable to create a tempfile: %v", err)
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}
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path := tmpfile.Name()
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defer os.Remove(path)
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stat, err := os.Stat(path)
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if err != nil {
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t.Fatalf("Failed to stat %s: %v", path, err)
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}
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port, err := unix.NewEventPort()
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if err != nil {
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t.Fatalf("NewEventPort failed: %v", err)
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}
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defer port.Close()
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cookie := stat.Mode()
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err = port.AssociatePath(path, stat, unix.FILE_MODIFIED, cookie)
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if err != nil {
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t.Errorf("AssociatePath failed: %v", err)
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}
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if !port.PathIsWatched(path) {
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t.Errorf("PathIsWatched unexpectedly returned false")
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}
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err = port.DissociatePath(path)
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if err != nil {
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t.Errorf("DissociatePath failed: %v", err)
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}
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err = port.AssociatePath(path, stat, unix.FILE_MODIFIED, cookie)
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if err != nil {
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t.Errorf("AssociatePath failed: %v", err)
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}
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bs := []byte{42}
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tmpfile.Write(bs)
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timeout := new(unix.Timespec)
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timeout.Sec = 1
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pevent, err := port.GetOne(timeout)
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if err == unix.ETIME {
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t.Errorf("GetOne timed out: %v", err)
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}
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if err != nil {
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t.Errorf("GetOne failed: %v", err)
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}
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if pevent.Path != path {
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t.Errorf("Path mismatch: %v != %v", pevent.Path, path)
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}
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err = port.AssociatePath(path, stat, unix.FILE_MODIFIED, cookie)
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if err != nil {
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t.Errorf("AssociatePath failed: %v", err)
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}
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err = port.AssociatePath(path, stat, unix.FILE_MODIFIED, cookie)
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if err == nil {
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t.Errorf("Unexpected success associating already associated path")
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}
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}
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func TestEventPortFds(t *testing.T) {
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_, path, _, _ := runtime.Caller(0)
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stat, err := os.Stat(path)
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cookie := stat.Mode()
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port, err := unix.NewEventPort()
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if err != nil {
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t.Errorf("NewEventPort failed: %v", err)
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}
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defer port.Close()
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r, w, err := os.Pipe()
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if err != nil {
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t.Errorf("unable to create a pipe: %v", err)
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}
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defer w.Close()
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defer r.Close()
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fd := r.Fd()
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port.AssociateFd(fd, unix.POLLIN, cookie)
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if !port.FdIsWatched(fd) {
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t.Errorf("FdIsWatched unexpectedly returned false")
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}
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err = port.DissociateFd(fd)
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err = port.AssociateFd(fd, unix.POLLIN, cookie)
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bs := []byte{42}
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w.Write(bs)
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n, err := port.Pending()
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if n != 1 {
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t.Errorf("Pending() failed: %v, %v", n, err)
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}
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timeout := new(unix.Timespec)
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timeout.Sec = 1
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pevent, err := port.GetOne(timeout)
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if err == unix.ETIME {
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t.Errorf("GetOne timed out: %v", err)
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}
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if err != nil {
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t.Errorf("GetOne failed: %v", err)
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}
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if pevent.Fd != fd {
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t.Errorf("Fd mismatch: %v != %v", pevent.Fd, fd)
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}
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var c = pevent.Cookie
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if c == nil {
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t.Errorf("Cookie missing: %v != %v", cookie, c)
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return
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}
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if c != cookie {
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t.Errorf("Cookie mismatch: %v != %v", cookie, c)
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}
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port.AssociateFd(fd, unix.POLLIN, cookie)
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err = port.AssociateFd(fd, unix.POLLIN, cookie)
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if err == nil {
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t.Errorf("unexpected success associating already associated fd")
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}
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}
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func TestEventPortErrors(t *testing.T) {
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tmpfile, err := ioutil.TempFile("", "eventport")
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if err != nil {
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t.Errorf("unable to create a tempfile: %v", err)
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}
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path := tmpfile.Name()
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stat, _ := os.Stat(path)
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os.Remove(path)
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port, _ := unix.NewEventPort()
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defer port.Close()
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err = port.AssociatePath(path, stat, unix.FILE_MODIFIED, nil)
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if err == nil {
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t.Errorf("unexpected success associating nonexistant file")
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}
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err = port.DissociatePath(path)
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if err == nil {
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t.Errorf("unexpected success dissociating unassociated path")
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}
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timeout := new(unix.Timespec)
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timeout.Nsec = 1
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_, err = port.GetOne(timeout)
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if err != unix.ETIME {
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t.Errorf("unexpected lack of timeout")
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}
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err = port.DissociateFd(uintptr(0))
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if err == nil {
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t.Errorf("unexpected success dissociating unassociated fd")
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}
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events := make([]unix.PortEvent, 4, 4)
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_, err = port.Get(events, 5, nil)
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if err == nil {
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t.Errorf("unexpected success calling Get with min greater than len of slice")
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}
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_, err = port.Get(nil, 1, nil)
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if err == nil {
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t.Errorf("unexpected success calling Get with nil slice")
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}
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_, err = port.Get(nil, 0, nil)
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if err == nil {
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t.Errorf("unexpected success calling Get with nil slice")
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}
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}
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func ExamplePortEvent() {
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type MyCookie struct {
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Name string
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}
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cookie := MyCookie{"Cookie Monster"}
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port, err := unix.NewEventPort()
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if err != nil {
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fmt.Printf("NewEventPort failed: %v\n", err)
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return
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}
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defer port.Close()
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r, w, err := os.Pipe()
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if err != nil {
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fmt.Printf("os.Pipe() failed: %v\n", err)
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return
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}
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defer w.Close()
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defer r.Close()
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fd := r.Fd()
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port.AssociateFd(fd, unix.POLLIN, cookie)
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bs := []byte{42}
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w.Write(bs)
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timeout := new(unix.Timespec)
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timeout.Sec = 1
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pevent, err := port.GetOne(timeout)
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if err != nil {
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fmt.Printf("didn't get the expected event: %v\n", err)
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}
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// Use a type assertion to convert the received cookie back to its original type
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c := pevent.Cookie.(MyCookie)
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fmt.Printf("%s", c.Name)
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//Output: Cookie Monster
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}
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func TestPortEventSlices(t *testing.T) {
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port, err := unix.NewEventPort()
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if err != nil {
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t.Fatalf("NewEventPort failed: %v", err)
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}
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// Create, associate, and delete 6 files
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for i := 0; i < 6; i++ {
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tmpfile, err := ioutil.TempFile("", "eventport")
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if err != nil {
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t.Fatalf("unable to create tempfile: %v", err)
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}
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path := tmpfile.Name()
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stat, err := os.Stat(path)
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if err != nil {
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t.Fatalf("unable to stat tempfile: %v", err)
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}
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err = port.AssociatePath(path, stat, unix.FILE_MODIFIED, nil)
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if err != nil {
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t.Fatalf("unable to AssociatePath tempfile: %v", err)
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}
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err = os.Remove(path)
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if err != nil {
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t.Fatalf("unable to Remove tempfile: %v", err)
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}
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}
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n, err := port.Pending()
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if err != nil {
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t.Errorf("Pending failed: %v", err)
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}
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if n != 6 {
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t.Errorf("expected 6 pending events, got %d", n)
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}
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timeout := new(unix.Timespec)
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timeout.Nsec = 1
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events := make([]unix.PortEvent, 4, 4)
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n, err = port.Get(events, 3, timeout)
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if err != nil {
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t.Errorf("Get failed: %v", err)
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}
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if n != 4 {
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t.Errorf("expected 4 events, got %d", n)
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}
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e := events[:n]
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for _, p := range e {
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if p.Events != unix.FILE_DELETE {
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t.Errorf("unexpected event. got %v, expected %v", p.Events, unix.FILE_DELETE)
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}
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}
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n, err = port.Get(events, 3, timeout)
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if err != unix.ETIME {
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t.Errorf("unexpected error. got %v, expected %v", err, unix.ETIME)
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}
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if n != 2 {
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t.Errorf("expected 2 events, got %d", n)
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}
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e = events[:n]
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for _, p := range e {
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if p.Events != unix.FILE_DELETE {
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t.Errorf("unexpected event. got %v, expected %v", p.Events, unix.FILE_DELETE)
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}
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}
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r, w, err := os.Pipe()
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if err != nil {
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t.Fatalf("unable to create a pipe: %v", err)
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}
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port.AssociateFd(r.Fd(), unix.POLLIN, nil)
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port.AssociateFd(w.Fd(), unix.POLLOUT, nil)
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bs := []byte{41}
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w.Write(bs)
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n, err = port.Get(events, 1, timeout)
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if err != nil {
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t.Errorf("Get failed: %v", err)
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}
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if n != 2 {
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t.Errorf("expected 2 events, got %d", n)
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}
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err = w.Close()
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if err != nil {
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t.Errorf("w.Close() failed: %v", err)
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}
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err = r.Close()
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if err != nil {
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t.Errorf("r.Close() failed: %v", err)
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}
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err = port.Close()
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if err != nil {
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t.Errorf("port.Close() failed: %v", err)
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}
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}
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