forked from containerd/containerd
/
io_unix.go
68 lines (60 loc) · 1.15 KB
/
io_unix.go
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// +build !windows
package shim
import (
gocontext "context"
"io"
"os"
"sync"
"github.com/containerd/fifo"
"golang.org/x/sys/unix"
)
func prepareStdio(stdin, stdout, stderr string, console bool) (wg *sync.WaitGroup, err error) {
wg = &sync.WaitGroup{}
ctx := gocontext.Background()
f, err := fifo.OpenFifo(ctx, stdin, unix.O_WRONLY|unix.O_CREAT|unix.O_NONBLOCK, 0700)
if err != nil {
return nil, err
}
defer func(c io.Closer) {
if err != nil {
c.Close()
}
}(f)
go func(w io.WriteCloser) {
io.Copy(w, os.Stdin)
w.Close()
}(f)
f, err = fifo.OpenFifo(ctx, stdout, unix.O_RDONLY|unix.O_CREAT|unix.O_NONBLOCK, 0700)
if err != nil {
return nil, err
}
defer func(c io.Closer) {
if err != nil {
c.Close()
}
}(f)
wg.Add(1)
go func(r io.ReadCloser) {
io.Copy(os.Stdout, r)
r.Close()
wg.Done()
}(f)
f, err = fifo.OpenFifo(ctx, stderr, unix.O_RDONLY|unix.O_CREAT|unix.O_NONBLOCK, 0700)
if err != nil {
return nil, err
}
defer func(c io.Closer) {
if err != nil {
c.Close()
}
}(f)
if !console {
wg.Add(1)
go func(r io.ReadCloser) {
io.Copy(os.Stderr, r)
r.Close()
wg.Done()
}(f)
}
return wg, nil
}