diff options
Diffstat (limited to 'pkg/sentry/fs/tty/master.go')
| -rw-r--r-- | pkg/sentry/fs/tty/master.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/pkg/sentry/fs/tty/master.go b/pkg/sentry/fs/tty/master.go index 3c47ee517..74cdbe874 100644 --- a/pkg/sentry/fs/tty/master.go +++ b/pkg/sentry/fs/tty/master.go @@ -148,6 +148,9 @@ func (mf *masterFileOperations) Write(ctx context.Context, _ *fs.File, src userm // Ioctl implements fs.FileOperations.Ioctl. func (mf *masterFileOperations) Ioctl(ctx context.Context, io usermem.IO, args arch.SyscallArguments) (uintptr, error) { switch args[1].Uint() { + case linux.FIONREAD: // linux.FIONREAD == linux.TIOCINQ + // Get the number of bytes in the output queue read buffer. + return 0, mf.t.ld.outputQueueReadSize(ctx, io, args) case linux.TCGETS: // N.B. TCGETS on the master actually returns the configuration // of the slave end. |