Add Fs controls

Add Fs controls and implement "cat" command.

PiperOrigin-RevId: 388812540

1 files changed, 8 insertions, 0 deletions

diff --git a/runsc/cmd/debug.go b/runsc/cmd/debug.go
index da81cf048..f773ccca0 100644
--- a/runsc/cmd/debug.go
+++ b/runsc/cmd/debug.go
@@ -48,6 +48,7 @@ type Debug struct {
 	delay        time.Duration
 	duration     time.Duration
 	ps           bool
+	cat          stringSlice
 }
 
 // Name implements subcommands.Command.
@@ -81,6 +82,7 @@ func (d *Debug) SetFlags(f *flag.FlagSet) {
 	f.StringVar(&d.logLevel, "log-level", "", "The log level to set: warning (0), info (1), or debug (2).")
 	f.StringVar(&d.logPackets, "log-packets", "", "A boolean value to enable or disable packet logging: true or false.")
 	f.BoolVar(&d.ps, "ps", false, "lists processes")
+	f.Var(&d.cat, "cat", "reads files and print to standard output")
 }
 
 // Execute implements subcommands.Command.Execute.
@@ -367,5 +369,11 @@ func (d *Debug) Execute(_ context.Context, f *flag.FlagSet, args ...interface{})
 		return subcommands.ExitFailure
 	}
 
+	if d.cat != nil {
+		if err := c.Cat(d.cat, os.Stdout); err != nil {
+			return Errorf("Cat failed: %v", err)
+		}
+	}
+
 	return subcommands.ExitSuccess
 }