6f027e38a8
Remove build tags which are already implied by the name of the file. Ensures build tags are used consistently Signed-off-by: Derek McGowan <derek@mcg.dev>
98 lines
2.2 KiB
Go
98 lines
2.2 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package logging
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import (
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"context"
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"fmt"
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"net"
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"os"
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"os/signal"
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"syscall"
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"github.com/Microsoft/go-winio"
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"github.com/pkg/errors"
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)
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// Run the logging driver
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func Run(fn LoggerFunc) {
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err := runInternal(fn)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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os.Exit(0)
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}
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func runInternal(fn LoggerFunc) error {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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var (
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soutPipe, serrPipe, waitPipe string
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sout, serr, wait net.Conn
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ok bool
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err error
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)
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if soutPipe, ok = os.LookupEnv("CONTAINER_STDOUT"); !ok {
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return errors.New("'CONTAINER_STDOUT' environment variable missing")
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}
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if sout, err = winio.DialPipeContext(ctx, soutPipe); err != nil {
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return errors.Wrap(err, "unable to dial stdout pipe")
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}
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if serrPipe, ok = os.LookupEnv("CONTAINER_STDERR"); !ok {
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return errors.New("'CONTAINER_STDERR' environment variable missing")
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}
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if serr, err = winio.DialPipeContext(ctx, serrPipe); err != nil {
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return errors.Wrap(err, "unable to dial stderr pipe")
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}
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waitPipe = os.Getenv("CONTAINER_WAIT")
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if wait, err = winio.DialPipeContext(ctx, waitPipe); err != nil {
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return errors.Wrap(err, "unable to dial wait pipe")
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}
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config := &Config{
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ID: os.Getenv("CONTAINER_ID"),
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Namespace: os.Getenv("CONTAINER_NAMESPACE"),
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Stdout: sout,
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Stderr: serr,
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}
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var (
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sigCh = make(chan os.Signal, 2)
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errCh = make(chan error, 1)
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)
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signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
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go func() {
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errCh <- fn(ctx, config, wait.Close)
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}()
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for {
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select {
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case <-sigCh:
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cancel()
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case err = <-errCh:
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return err
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}
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}
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}
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