mirror of
https://github.com/containerd/containerd.git
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Eric Curtin
a2622c0a7a
Only the Windows listener and dialer take the unix:// scheme. Assisted-by: OpenCode (claude-sonnet-5-5) Signed-off-by: Eric Curtin <eric.curtin@docker.com>
120 lines
3.3 KiB
Go
120 lines
3.3 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package sys
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import (
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"net"
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"os"
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"path/filepath"
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"runtime"
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"testing"
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"time"
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// required for `-test.root` flag not to fail
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_ "github.com/containerd/continuity/testutil"
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)
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// shortTempDir returns a temporary directory with a short path: t.TempDir
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// embeds the test name, which can overflow the sun_path limit (104 on macOS).
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func shortTempDir(t *testing.T) string {
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t.Helper()
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dir, err := os.MkdirTemp("", "sock")
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if err != nil {
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t.Fatal(err)
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}
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t.Cleanup(func() { os.RemoveAll(dir) })
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return dir
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}
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// checkAccept verifies that a connection made by dial reaches l.
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func checkAccept(t *testing.T, l net.Listener, dial func() (net.Conn, error)) {
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t.Helper()
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type accepted struct {
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conn net.Conn
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err error
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}
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done := make(chan accepted, 1)
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go func() {
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conn, err := l.Accept()
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done <- accepted{conn, err}
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}()
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conn, err := dial()
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if err != nil {
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t.Fatalf("dial failed: %v", err)
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}
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// Stay connected until Accept returns: go-winio drops a pipe connection
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// that the client closed first, and Accept then waits for another one.
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defer conn.Close()
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select {
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case a := <-done:
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if a.err != nil {
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t.Fatalf("Accept failed: %v", a.err)
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}
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a.conn.Close()
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case <-time.After(10 * time.Second):
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t.Fatal("Accept did not return")
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}
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}
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func TestGetLocalListenerUnixSocket(t *testing.T) {
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prefixes := []string{""}
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if runtime.GOOS == "windows" {
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// Only the Windows listener takes the scheme.
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prefixes = append(prefixes, "unix://")
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}
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for _, prefix := range prefixes {
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t.Run("prefix="+prefix, func(t *testing.T) {
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sockPath := filepath.Join(shortTempDir(t), "test.sock")
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l, err := GetLocalListener(prefix+sockPath, os.Getuid(), os.Getgid())
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if err != nil {
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t.Fatalf("GetLocalListener(%q) failed: %v", prefix+sockPath, err)
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}
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defer l.Close()
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checkAccept(t, l, func() (net.Conn, error) { return net.Dial("unix", sockPath) })
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})
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}
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}
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// TestGetLocalListenerStaleSocket verifies that a socket file left by a
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// previous listener does not prevent listening on the same path.
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func TestGetLocalListenerStaleSocket(t *testing.T) {
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sockPath := filepath.Join(shortTempDir(t), "test.sock")
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l, err := GetLocalListener(sockPath, os.Getuid(), os.Getgid())
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if err != nil {
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t.Fatalf("GetLocalListener(%q) failed: %v", sockPath, err)
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}
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l.(*net.UnixListener).SetUnlinkOnClose(false)
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l.Close()
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if _, err := os.Lstat(sockPath); err != nil {
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t.Fatalf("expected a stale socket at %q: %v", sockPath, err)
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}
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l, err = GetLocalListener(sockPath, os.Getuid(), os.Getgid())
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if err != nil {
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t.Fatalf("GetLocalListener(%q) over a stale socket failed: %v", sockPath, err)
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}
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defer l.Close()
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checkAccept(t, l, func() (net.Conn, error) { return net.Dial("unix", sockPath) })
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}
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