runsc: Fix stdin/out/err in multi-container mode.

Stdin/out/err weren't being sent to the sentry.

PiperOrigin-RevId: 213307171
Change-Id: Ie4b634a58b1b69aa934ce8597e5cc7a47a2bcda2

1 files changed, 12 insertions, 6 deletions

diff --git a/runsc/boot/loader.go b/runsc/boot/loader.go
index 2ddb358bd..5e9ccb96f 100644
--- a/runsc/boot/loader.go
+++ b/runsc/boot/loader.go
@@ -77,8 +77,11 @@ type Loader struct {
 
 	watchdog *watchdog.Watchdog
 
-	// ioFDs are the FDs that attach the sandbox to the gofers.
-	ioFDs []int
+	// stdioFDs contains stdin, stdout, and stderr.
+	stdioFDs []int
+
+	// goferFDs are the FDs that attach the sandbox to the gofers.
+	goferFDs []int
 
 	// spec is the base configuration for the root container.
 	spec *specs.Spec
@@ -121,7 +124,7 @@ func init() {
 
 // New initializes a new kernel loader configured by spec.
 // New also handles setting up a kernel for restoring a container.
-func New(spec *specs.Spec, conf *Config, controllerFD, deviceFD int, ioFDs []int, console bool) (*Loader, error) {
+func New(spec *specs.Spec, conf *Config, controllerFD, deviceFD int, goferFDs []int, console bool) (*Loader, error) {
 	// Create kernel and platform.
 	p, err := createPlatform(conf, deviceFD)
 	if err != nil {
@@ -252,7 +255,8 @@ func New(spec *specs.Spec, conf *Config, controllerFD, deviceFD int, ioFDs []int
 		conf:                  conf,
 		console:               console,
 		watchdog:              watchdog,
-		ioFDs:                 ioFDs,
+		stdioFDs:              []int{syscall.Stdin, syscall.Stdout, syscall.Stderr},
+		goferFDs:              goferFDs,
 		spec:                  spec,
 		startSignalForwarding: startSignalForwarding,
 		rootProcArgs:          procArgs,
@@ -364,7 +368,8 @@ func (l *Loader) run() error {
 			&l.rootProcArgs,
 			l.spec,
 			l.conf,
-			l.ioFDs,
+			l.stdioFDs,
+			l.goferFDs,
 			l.console,
 			l.rootProcArgs.Credentials,
 			l.rootProcArgs.Limits,
@@ -446,7 +451,8 @@ func (l *Loader) startContainer(k *kernel.Kernel, spec *specs.Spec, conf *Config
 		&procArgs,
 		spec,
 		conf,
-		ioFDs,
+		ioFDs[:3], // stdioFDs
+		ioFDs[3:], // goferFDs
 		false,
 		creds,
 		procArgs.Limits,