| 1 | //go:build !windows |
| 2 | |
| 3 | package main |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "os" |
| 8 | "os/exec" |
| 9 | "sync" |
| 10 | "syscall" |
| 11 | |
| 12 | "github.com/creack/pty" |
| 13 | ) |
| 14 | |
| 15 | type unixTerminalProcess struct { |
| 16 | cmd *exec.Cmd |
| 17 | pty *os.File |
| 18 | closeOnce sync.Once |
| 19 | cleanup func() |
| 20 | } |
| 21 | |
| 22 | func terminalPlatformAvailable() (bool, string) { |
| 23 | return true, "" |
| 24 | } |
| 25 | |
| 26 | func startTerminalProcess(spec terminalStartSpec) (terminalProcess, error) { |
| 27 | env, cleanup, err := terminalInputEnvironment(spec) |
| 28 | if err != nil { |
| 29 | return nil, err |
| 30 | } |
| 31 | cmd := exec.Command(spec.command.path, spec.command.args...) |
| 32 | cmd.Dir = spec.dir |
| 33 | cmd.Env = env |
| 34 | file, err := pty.StartWithSize(cmd, &pty.Winsize{Rows: uint16(spec.rows), Cols: uint16(spec.cols)}) |
| 35 | if err != nil { |
| 36 | cleanup() |
| 37 | return nil, err |
| 38 | } |
| 39 | return &unixTerminalProcess{cmd: cmd, pty: file, cleanup: cleanup}, nil |
| 40 | } |
| 41 | |
| 42 | func (p *unixTerminalProcess) Read(data []byte) (int, error) { |
| 43 | return p.pty.Read(data) |
| 44 | } |
| 45 | |
| 46 | func (p *unixTerminalProcess) Write(data []byte) (int, error) { |
| 47 | return p.pty.Write(data) |
| 48 | } |
| 49 | |
| 50 | func (p *unixTerminalProcess) Resize(cols, rows int) error { |
| 51 | return pty.Setsize(p.pty, &pty.Winsize{Rows: uint16(rows), Cols: uint16(cols)}) |
| 52 | } |
| 53 | |
| 54 | func (p *unixTerminalProcess) Wait() (int, error) { |
| 55 | defer p.cleanup() |
| 56 | err := p.cmd.Wait() |
| 57 | if p.cmd.ProcessState != nil { |
| 58 | return p.cmd.ProcessState.ExitCode(), err |
| 59 | } |
| 60 | var exitErr *exec.ExitError |
| 61 | if errors.As(err, &exitErr) { |
| 62 | return exitErr.ExitCode(), err |
| 63 | } |
| 64 | return -1, err |
| 65 | } |
| 66 | |
| 67 | func (p *unixTerminalProcess) Close() error { |
| 68 | defer p.cleanup() |
| 69 | var closeErr error |
| 70 | p.closeOnce.Do(func() { |
| 71 | if p.cmd.Process != nil { |
| 72 | // creack/pty starts the command in a new session. Killing the process |
| 73 | // group prevents foreground children from surviving a closed tab. |
| 74 | _ = syscall.Kill(-p.cmd.Process.Pid, syscall.SIGKILL) |
| 75 | } |
| 76 | closeErr = p.pty.Close() |
| 77 | }) |
| 78 | return closeErr |
| 79 | } |
| 80 |