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package terminal
import (
"bufio"
"context"
"fmt"
"os"
"github.com/containers/podman/v3/libpod"
"github.com/containers/podman/v3/libpod/define"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"golang.org/x/crypto/ssh/terminal"
)
// ExecAttachCtr execs and attaches to a container
func ExecAttachCtr(ctx context.Context, ctr *libpod.Container, execConfig *libpod.ExecConfig, streams *define.AttachStreams) (int, error) {
var resize chan define.TerminalSize
haveTerminal := terminal.IsTerminal(int(os.Stdin.Fd()))
// Check if we are attached to a terminal. If we are, generate resize
// events, and set the terminal to raw mode
if haveTerminal && execConfig.Terminal {
resize = make(chan define.TerminalSize)
cancel, oldTermState, err := handleTerminalAttach(ctx, resize)
if err != nil {
return -1, err
}
defer cancel()
defer func() {
if err := restoreTerminal(oldTermState); err != nil {
logrus.Errorf("Unable to restore terminal: %q", err)
}
}()
}
return ctr.Exec(execConfig, streams, resize)
}
// StartAttachCtr starts and (if required) attaches to a container
// if you change the signature of this function from os.File to io.Writer, it will trigger a downstream
// error. we may need to just lint disable this one.
func StartAttachCtr(ctx context.Context, ctr *libpod.Container, stdout, stderr, stdin *os.File, detachKeys string, sigProxy bool, startContainer bool) error { //nolint-interfacer
resize := make(chan define.TerminalSize)
haveTerminal := terminal.IsTerminal(int(os.Stdin.Fd()))
// Check if we are attached to a terminal. If we are, generate resize
// events, and set the terminal to raw mode
if haveTerminal && ctr.Spec().Process.Terminal {
cancel, oldTermState, err := handleTerminalAttach(ctx, resize)
if err != nil {
return err
}
defer func() {
if err := restoreTerminal(oldTermState); err != nil {
logrus.Errorf("Unable to restore terminal: %q", err)
}
}()
defer cancel()
}
streams := new(define.AttachStreams)
streams.OutputStream = stdout
streams.ErrorStream = stderr
streams.InputStream = bufio.NewReader(stdin)
streams.AttachOutput = true
streams.AttachError = true
streams.AttachInput = true
if stdout == nil {
logrus.Debugf("Not attaching to stdout")
streams.AttachOutput = false
}
if stderr == nil {
logrus.Debugf("Not attaching to stderr")
streams.AttachError = false
}
if stdin == nil {
logrus.Debugf("Not attaching to stdin")
streams.AttachInput = false
}
if !startContainer {
if sigProxy {
ProxySignals(ctr)
}
return ctr.Attach(streams, detachKeys, resize)
}
attachChan, err := ctr.StartAndAttach(ctx, streams, detachKeys, resize, true)
if err != nil {
return err
}
if sigProxy {
ProxySignals(ctr)
}
if stdout == nil && stderr == nil {
fmt.Printf("%s\n", ctr.ID())
}
err = <-attachChan
if err != nil {
return errors.Wrapf(err, "error attaching to container %s", ctr.ID())
}
return nil
}
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