rootlessport: handle SIGPIPE
when a sigpipe is received the stdout/stderr pipe was closed, so
reopen them with /dev/null.
Closes:
@@ -19,6 +19,7 @@ import (
"io/ioutil"
"os"
"os/exec"
+ "os/signal"
"syscall"
"github.com/containernetworking/plugins/pkg/ns"
@@ -101,6 +102,28 @@ func parent() error {
return err
}
+ sigC := make(chan os.Signal, 1)
+ signal.Notify(sigC, syscall.SIGPIPE)
+ defer func() {
+ // dummy signal to terminate the goroutine
+ sigC <- syscall.SIGKILL
+ }()
+ go func() {
+ defer func() {
+ signal.Stop(sigC)
+ close(sigC)
+ }()
+
+ s := <-sigC
+ if s == syscall.SIGPIPE {
+ if f, err := os.OpenFile("/dev/null", os.O_WRONLY, 0755); err == nil {
+ syscall.Dup2(int(f.Fd()), 1) // nolint:errcheck
+ syscall.Dup2(int(f.Fd()), 2) // nolint:errcheck
+ f.Close()
+ }
+ }
+ }()
+
// create the parent driver
stateDir, err := ioutil.TempDir(cfg.TmpDir, "rootlessport")
if err != nil {
