mirror of https://github.com/docker/cli.git
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
package pty
|
|
|
|
import (
|
|
"os"
|
|
"os/exec"
|
|
"syscall"
|
|
)
|
|
|
|
// Start assigns a pseudo-terminal tty os.File to c.Stdin, c.Stdout,
|
|
// and c.Stderr, calls c.Start, and returns the File of the tty's
|
|
// corresponding pty.
|
|
//
|
|
// Starts the process in a new session and sets the controlling terminal.
|
|
func Start(cmd *exec.Cmd) (*os.File, error) {
|
|
return StartWithSize(cmd, nil)
|
|
}
|
|
|
|
// StartWithAttrs assigns a pseudo-terminal tty os.File to c.Stdin, c.Stdout,
|
|
// and c.Stderr, calls c.Start, and returns the File of the tty's
|
|
// corresponding pty.
|
|
//
|
|
// This will resize the pty to the specified size before starting the command if a size is provided.
|
|
// The `attrs` parameter overrides the one set in c.SysProcAttr.
|
|
//
|
|
// This should generally not be needed. Used in some edge cases where it is needed to create a pty
|
|
// without a controlling terminal.
|
|
func StartWithAttrs(c *exec.Cmd, sz *Winsize, attrs *syscall.SysProcAttr) (*os.File, error) {
|
|
pty, tty, err := Open()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer func() { _ = tty.Close() }() // Best effort.
|
|
|
|
if sz != nil {
|
|
if err := Setsize(pty, sz); err != nil {
|
|
_ = pty.Close() // Best effort.
|
|
return nil, err
|
|
}
|
|
}
|
|
if c.Stdout == nil {
|
|
c.Stdout = tty
|
|
}
|
|
if c.Stderr == nil {
|
|
c.Stderr = tty
|
|
}
|
|
if c.Stdin == nil {
|
|
c.Stdin = tty
|
|
}
|
|
|
|
c.SysProcAttr = attrs
|
|
|
|
if err := c.Start(); err != nil {
|
|
_ = pty.Close() // Best effort.
|
|
return nil, err
|
|
}
|
|
return pty, err
|
|
}
|