mirror of
https://github.com/autc04/Retro68.git
synced 2024-10-18 22:25:22 +00:00
240 lines
6.0 KiB
Go
240 lines
6.0 KiB
Go
// 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.
|
|
|
|
// +build darwin dragonfly freebsd linux,!android netbsd openbsd
|
|
// +build cgo
|
|
|
|
// Note that this test does not work on Solaris: issue #22849.
|
|
// Don't run the test on Android because at least some versions of the
|
|
// C library do not define the posix_openpt function.
|
|
|
|
package signal_test
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"os/exec"
|
|
"os/signal/internal/pty"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"syscall"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func TestTerminalSignal(t *testing.T) {
|
|
const enteringRead = "test program entering read"
|
|
if os.Getenv("GO_TEST_TERMINAL_SIGNALS") != "" {
|
|
var b [1]byte
|
|
fmt.Println(enteringRead)
|
|
n, err := os.Stdin.Read(b[:])
|
|
if n == 1 {
|
|
if b[0] == '\n' {
|
|
// This is what we expect
|
|
fmt.Println("read newline")
|
|
} else {
|
|
fmt.Printf("read 1 byte: %q\n", b)
|
|
}
|
|
} else {
|
|
fmt.Printf("read %d bytes\n", n)
|
|
}
|
|
if err != nil {
|
|
fmt.Println(err)
|
|
os.Exit(1)
|
|
}
|
|
os.Exit(0)
|
|
}
|
|
|
|
t.Parallel()
|
|
|
|
// The test requires a shell that uses job control.
|
|
bash, err := exec.LookPath("bash")
|
|
if err != nil {
|
|
t.Skipf("could not find bash: %v", err)
|
|
}
|
|
|
|
scale := 1
|
|
if s := os.Getenv("GO_TEST_TIMEOUT_SCALE"); s != "" {
|
|
if sc, err := strconv.Atoi(s); err == nil {
|
|
scale = sc
|
|
}
|
|
}
|
|
pause := time.Duration(scale) * 10 * time.Millisecond
|
|
wait := time.Duration(scale) * 5 * time.Second
|
|
|
|
// The test only fails when using a "slow device," in this
|
|
// case a pseudo-terminal.
|
|
|
|
master, sname, err := pty.Open()
|
|
if err != nil {
|
|
ptyErr := err.(*pty.PtyError)
|
|
if ptyErr.FuncName == "posix_openpt" && ptyErr.Errno == syscall.EACCES {
|
|
t.Skip("posix_openpt failed with EACCES, assuming chroot and skipping")
|
|
}
|
|
t.Fatal(err)
|
|
}
|
|
defer master.Close()
|
|
slave, err := os.OpenFile(sname, os.O_RDWR, 0)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer slave.Close()
|
|
|
|
// Start an interactive shell.
|
|
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
|
|
defer cancel()
|
|
cmd := exec.CommandContext(ctx, bash, "--norc", "--noprofile", "-i")
|
|
// Clear HISTFILE so that we don't read or clobber the user's bash history.
|
|
cmd.Env = append(os.Environ(), "HISTFILE=")
|
|
cmd.Stdin = slave
|
|
cmd.Stdout = slave
|
|
cmd.Stderr = slave
|
|
cmd.SysProcAttr = &syscall.SysProcAttr{
|
|
Setsid: true,
|
|
Setctty: true,
|
|
Ctty: int(slave.Fd()),
|
|
}
|
|
|
|
if err := cmd.Start(); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if err := slave.Close(); err != nil {
|
|
t.Errorf("closing slave: %v", err)
|
|
}
|
|
|
|
progReady := make(chan bool)
|
|
sawPrompt := make(chan bool, 10)
|
|
const prompt = "prompt> "
|
|
|
|
// Read data from master in the background.
|
|
var wg sync.WaitGroup
|
|
wg.Add(1)
|
|
defer wg.Wait()
|
|
go func() {
|
|
defer wg.Done()
|
|
input := bufio.NewReader(master)
|
|
var line, handled []byte
|
|
for {
|
|
b, err := input.ReadByte()
|
|
if err != nil {
|
|
if len(line) > 0 || len(handled) > 0 {
|
|
t.Logf("%q", append(handled, line...))
|
|
}
|
|
if perr, ok := err.(*os.PathError); ok {
|
|
err = perr.Err
|
|
}
|
|
// EOF means master is closed.
|
|
// EIO means child process is done.
|
|
// "file already closed" means deferred close of master has happened.
|
|
if err != io.EOF && err != syscall.EIO && !strings.Contains(err.Error(), "file already closed") {
|
|
t.Logf("error reading from master: %v", err)
|
|
}
|
|
return
|
|
}
|
|
|
|
line = append(line, b)
|
|
|
|
if b == '\n' {
|
|
t.Logf("%q", append(handled, line...))
|
|
line = nil
|
|
handled = nil
|
|
continue
|
|
}
|
|
|
|
if bytes.Contains(line, []byte(enteringRead)) {
|
|
close(progReady)
|
|
handled = append(handled, line...)
|
|
line = nil
|
|
} else if bytes.Contains(line, []byte(prompt)) && !bytes.Contains(line, []byte("PS1=")) {
|
|
sawPrompt <- true
|
|
handled = append(handled, line...)
|
|
line = nil
|
|
}
|
|
}
|
|
}()
|
|
|
|
// Set the bash prompt so that we can see it.
|
|
if _, err := master.Write([]byte("PS1='" + prompt + "'\n")); err != nil {
|
|
t.Fatalf("setting prompt: %v", err)
|
|
}
|
|
select {
|
|
case <-sawPrompt:
|
|
case <-time.After(wait):
|
|
t.Fatal("timed out waiting for shell prompt")
|
|
}
|
|
|
|
// Start a small program that reads from stdin
|
|
// (namely the code at the top of this function).
|
|
if _, err := master.Write([]byte("GO_TEST_TERMINAL_SIGNALS=1 " + os.Args[0] + " -test.run=TestTerminalSignal\n")); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Wait for the program to print that it is starting.
|
|
select {
|
|
case <-progReady:
|
|
case <-time.After(wait):
|
|
t.Fatal("timed out waiting for program to start")
|
|
}
|
|
|
|
// Give the program time to enter the read call.
|
|
// It doesn't matter much if we occasionally don't wait long enough;
|
|
// we won't be testing what we want to test, but the overall test
|
|
// will pass.
|
|
time.Sleep(pause)
|
|
|
|
// Send a ^Z to stop the program.
|
|
if _, err := master.Write([]byte{26}); err != nil {
|
|
t.Fatalf("writing ^Z to pty: %v", err)
|
|
}
|
|
|
|
// Wait for the program to stop and return to the shell.
|
|
select {
|
|
case <-sawPrompt:
|
|
case <-time.After(wait):
|
|
t.Fatal("timed out waiting for shell prompt")
|
|
}
|
|
|
|
// Restart the stopped program.
|
|
if _, err := master.Write([]byte("fg\n")); err != nil {
|
|
t.Fatalf("writing %q to pty: %v", "fg", err)
|
|
}
|
|
|
|
// Give the process time to restart.
|
|
// This is potentially racy: if the process does not restart
|
|
// quickly enough then the byte we send will go to bash rather
|
|
// than the program. Unfortunately there isn't anything we can
|
|
// look for to know that the program is running again.
|
|
// bash will print the program name, but that happens before it
|
|
// restarts the program.
|
|
time.Sleep(10 * pause)
|
|
|
|
// Write some data for the program to read,
|
|
// which should cause it to exit.
|
|
if _, err := master.Write([]byte{'\n'}); err != nil {
|
|
t.Fatalf("writing %q to pty: %v", "\n", err)
|
|
}
|
|
|
|
// Wait for the program to exit.
|
|
select {
|
|
case <-sawPrompt:
|
|
case <-time.After(wait):
|
|
t.Fatal("timed out waiting for shell prompt")
|
|
}
|
|
|
|
// Exit the shell with the program's exit status.
|
|
if _, err := master.Write([]byte("exit $?\n")); err != nil {
|
|
t.Fatalf("writing %q to pty: %v", "exit", err)
|
|
}
|
|
|
|
if err = cmd.Wait(); err != nil {
|
|
t.Errorf("subprogram failed: %v", err)
|
|
}
|
|
}
|