2612e0c78a
Module remotecommand originally part of kubernetes/pkg/client/unversioned was moved to client-go/tools, and will be used as authoritative in kubectl, e2e and other places. Module remotecommand relies on util/exec module which will be copied to client-go/pkg/util
62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
// +build !windows
|
|
|
|
/*
|
|
Copyright 2016 The Kubernetes 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 term
|
|
|
|
import (
|
|
"os"
|
|
"os/signal"
|
|
"syscall"
|
|
|
|
"k8s.io/apimachinery/pkg/util/runtime"
|
|
"k8s.io/client-go/tools/remotecommand"
|
|
)
|
|
|
|
// monitorResizeEvents spawns a goroutine that waits for SIGWINCH signals (these indicate the
|
|
// terminal has resized). After receiving a SIGWINCH, this gets the terminal size and tries to send
|
|
// it to the resizeEvents channel. The goroutine stops when the stop channel is closed.
|
|
func monitorResizeEvents(fd uintptr, resizeEvents chan<- remotecommand.TerminalSize, stop chan struct{}) {
|
|
go func() {
|
|
defer runtime.HandleCrash()
|
|
|
|
winch := make(chan os.Signal, 1)
|
|
signal.Notify(winch, syscall.SIGWINCH)
|
|
defer signal.Stop(winch)
|
|
|
|
for {
|
|
select {
|
|
case <-winch:
|
|
size := GetSize(fd)
|
|
if size == nil {
|
|
return
|
|
}
|
|
|
|
// try to send size
|
|
select {
|
|
case resizeEvents <- *size:
|
|
// success
|
|
default:
|
|
// not sent
|
|
}
|
|
case <-stop:
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
}
|