Modified boot.go to allow for restores.

A file descriptor was added as a flag to boot so a state file can restore a
container that was checkpointed.

PiperOrigin-RevId: 201068699
Change-Id: I18e96069488ffa3add468861397f3877725544aa

1 files changed, 5 insertions, 1 deletions

diff --git a/runsc/cmd/boot.go b/runsc/cmd/boot.go
index 34dd8b3c0..86f597c09 100644
--- a/runsc/cmd/boot.go
+++ b/runsc/cmd/boot.go
@@ -48,6 +48,9 @@ type Boot struct {
 	// applyCaps determines if capabilities defined in the spec should be applied
 	// to the process.
 	applyCaps bool
+
+	// restoreFD is the file descriptor to the state file to be restored.
+	restoreFD int
 }
 
 // Name implements subcommands.Command.Name.
@@ -72,6 +75,7 @@ func (b *Boot) SetFlags(f *flag.FlagSet) {
 	f.Var(&b.ioFDs, "io-fds", "list of FDs to connect 9P clients. They must follow this order: root first, then mounts as defined in the spec")
 	f.BoolVar(&b.console, "console", false, "set to true if the sandbox should allow terminal ioctl(2) syscalls")
 	f.BoolVar(&b.applyCaps, "apply-caps", false, "if true, apply capabilities defined in the spec to the process")
+	f.IntVar(&b.restoreFD, "restore-fd", -1, "FD of the state file to be restored")
 }
 
 // Execute implements subcommands.Command.Execute.  It starts a sandbox in a
@@ -127,7 +131,7 @@ func (b *Boot) Execute(_ context.Context, f *flag.FlagSet, args ...interface{})
 	}
 
 	// Create the loader.
-	l, err := boot.New(spec, conf, b.controllerFD, b.ioFDs.GetArray(), b.console)
+	l, err := boot.New(spec, conf, b.controllerFD, b.restoreFD, b.ioFDs.GetArray(), b.console)
 	if err != nil {
 		Fatalf("error creating loader: %v", err)
 	}