mirror of https://github.com/k3s-io/k3s
77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
// +build !windows
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/*
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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 runc
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import (
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"github.com/pkg/errors"
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"golang.org/x/sys/unix"
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)
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// NewPipeIO creates pipe pairs to be used with runc
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func NewPipeIO(uid, gid int, opts ...IOOpt) (i IO, err error) {
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option := defaultIOOption()
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for _, o := range opts {
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o(option)
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}
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var (
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pipes []*pipe
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stdin, stdout, stderr *pipe
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)
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// cleanup in case of an error
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defer func() {
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if err != nil {
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for _, p := range pipes {
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p.Close()
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}
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}
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}()
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if option.OpenStdin {
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if stdin, err = newPipe(); err != nil {
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return nil, err
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}
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pipes = append(pipes, stdin)
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if err = unix.Fchown(int(stdin.r.Fd()), uid, gid); err != nil {
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return nil, errors.Wrap(err, "failed to chown stdin")
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}
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}
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if option.OpenStdout {
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if stdout, err = newPipe(); err != nil {
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return nil, err
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}
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pipes = append(pipes, stdout)
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if err = unix.Fchown(int(stdout.w.Fd()), uid, gid); err != nil {
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return nil, errors.Wrap(err, "failed to chown stdout")
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}
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}
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if option.OpenStderr {
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if stderr, err = newPipe(); err != nil {
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return nil, err
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}
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pipes = append(pipes, stderr)
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if err = unix.Fchown(int(stderr.w.Fd()), uid, gid); err != nil {
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return nil, errors.Wrap(err, "failed to chown stderr")
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}
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}
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return &pipeIO{
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in: stdin,
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out: stdout,
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err: stderr,
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}, nil
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}
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