diff options
Diffstat (limited to 'runsc/container/test_app')
| -rw-r--r-- | runsc/container/test_app/BUILD | 20 | ||||
| -rw-r--r-- | runsc/container/test_app/fds.go | 185 | ||||
| -rw-r--r-- | runsc/container/test_app/test_app.go | 394 |
3 files changed, 0 insertions, 599 deletions
diff --git a/runsc/container/test_app/BUILD b/runsc/container/test_app/BUILD deleted file mode 100644 index bfd338bb6..000000000 --- a/runsc/container/test_app/BUILD +++ /dev/null @@ -1,20 +0,0 @@ -load("@io_bazel_rules_go//go:def.bzl", "go_binary") - -package(licenses = ["notice"]) - -go_binary( - name = "test_app", - testonly = 1, - srcs = [ - "fds.go", - "test_app.go", - ], - pure = "on", - visibility = ["//runsc/container:__pkg__"], - deps = [ - "//pkg/unet", - "//runsc/testutil", - "@com_github_google_subcommands//:go_default_library", - "@com_github_kr_pty//:go_default_library", - ], -) diff --git a/runsc/container/test_app/fds.go b/runsc/container/test_app/fds.go deleted file mode 100644 index a90cc1662..000000000 --- a/runsc/container/test_app/fds.go +++ /dev/null @@ -1,185 +0,0 @@ -// Copyright 2019 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package main - -import ( - "context" - "io/ioutil" - "log" - "os" - "time" - - "flag" - "github.com/google/subcommands" - "gvisor.dev/gvisor/pkg/unet" - "gvisor.dev/gvisor/runsc/testutil" -) - -const fileContents = "foobarbaz" - -// fdSender will open a file and send the FD over a unix domain socket. -type fdSender struct { - socketPath string -} - -// Name implements subcommands.Command.Name. -func (*fdSender) Name() string { - return "fd_sender" -} - -// Synopsis implements subcommands.Command.Synopsys. -func (*fdSender) Synopsis() string { - return "creates a file and sends the FD over the socket" -} - -// Usage implements subcommands.Command.Usage. -func (*fdSender) Usage() string { - return "fd_sender <flags>" -} - -// SetFlags implements subcommands.Command.SetFlags. -func (fds *fdSender) SetFlags(f *flag.FlagSet) { - f.StringVar(&fds.socketPath, "socket", "", "path to socket") -} - -// Execute implements subcommands.Command.Execute. -func (fds *fdSender) Execute(ctx context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { - if fds.socketPath == "" { - log.Fatalf("socket flag must be set") - } - - dir, err := ioutil.TempDir("", "") - if err != nil { - log.Fatalf("TempDir failed: %v", err) - } - - fileToSend, err := ioutil.TempFile(dir, "") - if err != nil { - log.Fatalf("TempFile failed: %v", err) - } - defer fileToSend.Close() - - if _, err := fileToSend.WriteString(fileContents); err != nil { - log.Fatalf("Write(%q) failed: %v", fileContents, err) - } - - // Receiver may not be started yet, so try connecting in a poll loop. - var s *unet.Socket - if err := testutil.Poll(func() error { - var err error - s, err = unet.Connect(fds.socketPath, true /* SEQPACKET, so we can send empty message with FD */) - return err - }, 10*time.Second); err != nil { - log.Fatalf("Error connecting to socket %q: %v", fds.socketPath, err) - } - defer s.Close() - - w := s.Writer(true) - w.ControlMessage.PackFDs(int(fileToSend.Fd())) - if _, err := w.WriteVec([][]byte{[]byte{'a'}}); err != nil { - log.Fatalf("Error sending FD %q over socket %q: %v", fileToSend.Fd(), fds.socketPath, err) - } - - log.Print("FD SENDER exiting successfully") - return subcommands.ExitSuccess -} - -// fdReceiver receives an FD from a unix domain socket and does things to it. -type fdReceiver struct { - socketPath string -} - -// Name implements subcommands.Command.Name. -func (*fdReceiver) Name() string { - return "fd_receiver" -} - -// Synopsis implements subcommands.Command.Synopsys. -func (*fdReceiver) Synopsis() string { - return "reads an FD from a unix socket, and then does things to it" -} - -// Usage implements subcommands.Command.Usage. -func (*fdReceiver) Usage() string { - return "fd_receiver <flags>" -} - -// SetFlags implements subcommands.Command.SetFlags. -func (fdr *fdReceiver) SetFlags(f *flag.FlagSet) { - f.StringVar(&fdr.socketPath, "socket", "", "path to socket") -} - -// Execute implements subcommands.Command.Execute. -func (fdr *fdReceiver) Execute(ctx context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { - if fdr.socketPath == "" { - log.Fatalf("Flags cannot be empty, given: socket: %q", fdr.socketPath) - } - - ss, err := unet.BindAndListen(fdr.socketPath, true /* packet */) - if err != nil { - log.Fatalf("BindAndListen(%q) failed: %v", fdr.socketPath, err) - } - defer ss.Close() - - var s *unet.Socket - c := make(chan error, 1) - go func() { - var err error - s, err = ss.Accept() - c <- err - }() - - select { - case err := <-c: - if err != nil { - log.Fatalf("Accept() failed: %v", err) - } - case <-time.After(10 * time.Second): - log.Fatalf("Timeout waiting for accept") - } - - r := s.Reader(true) - r.EnableFDs(1) - b := [][]byte{{'a'}} - if n, err := r.ReadVec(b); n != 1 || err != nil { - log.Fatalf("ReadVec got n=%d err %v (wanted 0, nil)", n, err) - } - - fds, err := r.ExtractFDs() - if err != nil { - log.Fatalf("ExtractFD() got err %v", err) - } - if len(fds) != 1 { - log.Fatalf("ExtractFD() got %d FDs, wanted 1", len(fds)) - } - fd := fds[0] - - file := os.NewFile(uintptr(fd), "received file") - defer file.Close() - if _, err := file.Seek(0, os.SEEK_SET); err != nil { - log.Fatalf("Seek(0, 0) failed: %v", err) - } - - got, err := ioutil.ReadAll(file) - if err != nil { - log.Fatalf("ReadAll failed: %v", err) - } - if string(got) != fileContents { - log.Fatalf("ReadAll got %q want %q", string(got), fileContents) - } - - log.Print("FD RECEIVER exiting successfully") - return subcommands.ExitSuccess -} diff --git a/runsc/container/test_app/test_app.go b/runsc/container/test_app/test_app.go deleted file mode 100644 index a1c8a741a..000000000 --- a/runsc/container/test_app/test_app.go +++ /dev/null @@ -1,394 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Binary test_app is like a swiss knife for tests that need to run anything -// inside the sandbox. New functionality can be added with new commands. -package main - -import ( - "context" - "fmt" - "io" - "io/ioutil" - "log" - "net" - "os" - "os/exec" - "regexp" - "strconv" - sys "syscall" - "time" - - "flag" - "github.com/google/subcommands" - "github.com/kr/pty" - "gvisor.dev/gvisor/runsc/testutil" -) - -func main() { - subcommands.Register(subcommands.HelpCommand(), "") - subcommands.Register(subcommands.FlagsCommand(), "") - subcommands.Register(new(capability), "") - subcommands.Register(new(fdReceiver), "") - subcommands.Register(new(fdSender), "") - subcommands.Register(new(forkBomb), "") - subcommands.Register(new(ptyRunner), "") - subcommands.Register(new(reaper), "") - subcommands.Register(new(syscall), "") - subcommands.Register(new(taskTree), "") - subcommands.Register(new(uds), "") - - flag.Parse() - - exitCode := subcommands.Execute(context.Background()) - os.Exit(int(exitCode)) -} - -type uds struct { - fileName string - socketPath string -} - -// Name implements subcommands.Command.Name. -func (*uds) Name() string { - return "uds" -} - -// Synopsis implements subcommands.Command.Synopsys. -func (*uds) Synopsis() string { - return "creates unix domain socket client and server. Client sends a contant flow of sequential numbers. Server prints them to --file" -} - -// Usage implements subcommands.Command.Usage. -func (*uds) Usage() string { - return "uds <flags>" -} - -// SetFlags implements subcommands.Command.SetFlags. -func (c *uds) SetFlags(f *flag.FlagSet) { - f.StringVar(&c.fileName, "file", "", "name of output file") - f.StringVar(&c.socketPath, "socket", "", "path to socket") -} - -// Execute implements subcommands.Command.Execute. -func (c *uds) Execute(ctx context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { - if c.fileName == "" || c.socketPath == "" { - log.Fatalf("Flags cannot be empty, given: fileName: %q, socketPath: %q", c.fileName, c.socketPath) - return subcommands.ExitFailure - } - outputFile, err := os.OpenFile(c.fileName, os.O_WRONLY|os.O_CREATE, 0666) - if err != nil { - log.Fatal("error opening output file:", err) - } - - defer os.Remove(c.socketPath) - - listener, err := net.Listen("unix", c.socketPath) - if err != nil { - log.Fatal("error listening on socket %q:", c.socketPath, err) - } - - go server(listener, outputFile) - for i := 0; ; i++ { - conn, err := net.Dial("unix", c.socketPath) - if err != nil { - log.Fatal("error dialing:", err) - } - if _, err := conn.Write([]byte(strconv.Itoa(i))); err != nil { - log.Fatal("error writing:", err) - } - conn.Close() - time.Sleep(100 * time.Millisecond) - } -} - -func server(listener net.Listener, out *os.File) { - buf := make([]byte, 16) - - for { - c, err := listener.Accept() - if err != nil { - log.Fatal("error accepting connection:", err) - } - nr, err := c.Read(buf) - if err != nil { - log.Fatal("error reading from buf:", err) - } - data := buf[0:nr] - fmt.Fprint(out, string(data)+"\n") - } -} - -type taskTree struct { - depth int - width int - pause bool -} - -// Name implements subcommands.Command. -func (*taskTree) Name() string { - return "task-tree" -} - -// Synopsis implements subcommands.Command. -func (*taskTree) Synopsis() string { - return "creates a tree of tasks" -} - -// Usage implements subcommands.Command. -func (*taskTree) Usage() string { - return "task-tree <flags>" -} - -// SetFlags implements subcommands.Command. -func (c *taskTree) SetFlags(f *flag.FlagSet) { - f.IntVar(&c.depth, "depth", 1, "number of levels to create") - f.IntVar(&c.width, "width", 1, "number of tasks at each level") - f.BoolVar(&c.pause, "pause", false, "whether the tasks should pause perpetually") -} - -// Execute implements subcommands.Command. -func (c *taskTree) Execute(ctx context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { - stop := testutil.StartReaper() - defer stop() - - if c.depth == 0 { - log.Printf("Child sleeping, PID: %d\n", os.Getpid()) - select {} - } - log.Printf("Parent %d sleeping, PID: %d\n", c.depth, os.Getpid()) - - var cmds []*exec.Cmd - for i := 0; i < c.width; i++ { - cmd := exec.Command( - "/proc/self/exe", c.Name(), - "--depth", strconv.Itoa(c.depth-1), - "--width", strconv.Itoa(c.width), - "--pause", strconv.FormatBool(c.pause)) - cmd.Stdout = os.Stdout - cmd.Stderr = os.Stderr - - if err := cmd.Start(); err != nil { - log.Fatal("failed to call self:", err) - } - cmds = append(cmds, cmd) - } - - for _, c := range cmds { - c.Wait() - } - - if c.pause { - select {} - } - - return subcommands.ExitSuccess -} - -type forkBomb struct { - delay time.Duration -} - -// Name implements subcommands.Command. -func (*forkBomb) Name() string { - return "fork-bomb" -} - -// Synopsis implements subcommands.Command. -func (*forkBomb) Synopsis() string { - return "creates child process until the end of times" -} - -// Usage implements subcommands.Command. -func (*forkBomb) Usage() string { - return "fork-bomb <flags>" -} - -// SetFlags implements subcommands.Command. -func (c *forkBomb) SetFlags(f *flag.FlagSet) { - f.DurationVar(&c.delay, "delay", 100*time.Millisecond, "amount of time to delay creation of child") -} - -// Execute implements subcommands.Command. -func (c *forkBomb) Execute(ctx context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { - time.Sleep(c.delay) - - cmd := exec.Command("/proc/self/exe", c.Name()) - cmd.Stdout = os.Stdout - cmd.Stderr = os.Stderr - if err := cmd.Run(); err != nil { - log.Fatal("failed to call self:", err) - } - return subcommands.ExitSuccess -} - -type reaper struct{} - -// Name implements subcommands.Command. -func (*reaper) Name() string { - return "reaper" -} - -// Synopsis implements subcommands.Command. -func (*reaper) Synopsis() string { - return "reaps all children in a loop" -} - -// Usage implements subcommands.Command. -func (*reaper) Usage() string { - return "reaper <flags>" -} - -// SetFlags implements subcommands.Command. -func (*reaper) SetFlags(*flag.FlagSet) {} - -// Execute implements subcommands.Command. -func (c *reaper) Execute(ctx context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { - stop := testutil.StartReaper() - defer stop() - select {} -} - -type syscall struct { - sysno uint64 -} - -// Name implements subcommands.Command. -func (*syscall) Name() string { - return "syscall" -} - -// Synopsis implements subcommands.Command. -func (*syscall) Synopsis() string { - return "syscall makes a syscall" -} - -// Usage implements subcommands.Command. -func (*syscall) Usage() string { - return "syscall <flags>" -} - -// SetFlags implements subcommands.Command. -func (s *syscall) SetFlags(f *flag.FlagSet) { - f.Uint64Var(&s.sysno, "syscall", 0, "syscall to call") -} - -// Execute implements subcommands.Command. -func (s *syscall) Execute(ctx context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { - if _, _, errno := sys.Syscall(uintptr(s.sysno), 0, 0, 0); errno != 0 { - fmt.Printf("syscall(%d, 0, 0...) failed: %v\n", s.sysno, errno) - } else { - fmt.Printf("syscall(%d, 0, 0...) success\n", s.sysno) - } - return subcommands.ExitSuccess -} - -type capability struct { - enabled uint64 - disabled uint64 -} - -// Name implements subcommands.Command. -func (*capability) Name() string { - return "capability" -} - -// Synopsis implements subcommands.Command. -func (*capability) Synopsis() string { - return "checks if effective capabilities are set/unset" -} - -// Usage implements subcommands.Command. -func (*capability) Usage() string { - return "capability [--enabled=number] [--disabled=number]" -} - -// SetFlags implements subcommands.Command. -func (c *capability) SetFlags(f *flag.FlagSet) { - f.Uint64Var(&c.enabled, "enabled", 0, "") - f.Uint64Var(&c.disabled, "disabled", 0, "") -} - -// Execute implements subcommands.Command. -func (c *capability) Execute(ctx context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { - if c.enabled == 0 && c.disabled == 0 { - fmt.Println("One of the flags must be set") - return subcommands.ExitUsageError - } - - status, err := ioutil.ReadFile("/proc/self/status") - if err != nil { - fmt.Printf("Error reading %q: %v\n", "proc/self/status", err) - return subcommands.ExitFailure - } - re := regexp.MustCompile("CapEff:\t([0-9a-f]+)\n") - matches := re.FindStringSubmatch(string(status)) - if matches == nil || len(matches) != 2 { - fmt.Printf("Effective capabilities not found in\n%s\n", status) - return subcommands.ExitFailure - } - caps, err := strconv.ParseUint(matches[1], 16, 64) - if err != nil { - fmt.Printf("failed to convert capabilities %q: %v\n", matches[1], err) - return subcommands.ExitFailure - } - - if c.enabled != 0 && (caps&c.enabled) != c.enabled { - fmt.Printf("Missing capabilities, want: %#x: got: %#x\n", c.enabled, caps) - return subcommands.ExitFailure - } - if c.disabled != 0 && (caps&c.disabled) != 0 { - fmt.Printf("Extra capabilities found, dont_want: %#x: got: %#x\n", c.disabled, caps) - return subcommands.ExitFailure - } - - return subcommands.ExitSuccess -} - -type ptyRunner struct{} - -// Name implements subcommands.Command. -func (*ptyRunner) Name() string { - return "pty-runner" -} - -// Synopsis implements subcommands.Command. -func (*ptyRunner) Synopsis() string { - return "runs the given command with an open pty terminal" -} - -// Usage implements subcommands.Command. -func (*ptyRunner) Usage() string { - return "pty-runner [command]" -} - -// SetFlags implements subcommands.Command.SetFlags. -func (*ptyRunner) SetFlags(f *flag.FlagSet) {} - -// Execute implements subcommands.Command. -func (*ptyRunner) Execute(_ context.Context, fs *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus { - c := exec.Command(fs.Args()[0], fs.Args()[1:]...) - f, err := pty.Start(c) - if err != nil { - fmt.Printf("pty.Start failed: %v", err) - return subcommands.ExitFailure - } - defer f.Close() - - // Copy stdout from the command to keep this process alive until the - // subprocess exits. - io.Copy(os.Stdout, f) - - return subcommands.ExitSuccess -} |