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@@ -0,0 +1,55 @@
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+// +build freebsd,!cgo
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+
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+/*
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+ Copyright The containerd Authors.
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+
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+ Licensed under the Apache License, Version 2.0 (the "License");
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+ you may not use this file except in compliance with the License.
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+ You may obtain a copy of the License at
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+
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+ http://www.apache.org/licenses/LICENSE-2.0
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+
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+ Unless required by applicable law or agreed to in writing, software
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+ distributed under the License is distributed on an "AS IS" BASIS,
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+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ See the License for the specific language governing permissions and
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+ limitations under the License.
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+*/
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+
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+package console
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+
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+import (
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+ "fmt"
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+ "os"
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+
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+ "golang.org/x/sys/unix"
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+)
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+
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+const (
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+ cmdTcGet = unix.TIOCGETA
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+ cmdTcSet = unix.TIOCSETA
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+)
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+
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+//
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+// Implementing the functions below requires cgo support. Non-cgo stubs
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+// versions are defined below to enable cross-compilation of source code
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+// that depends on these functions, but the resultant cross-compiled
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+// binaries cannot actually be used. If the stub function(s) below are
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+// actually invoked they will display an error message and cause the
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+// calling process to exit.
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+//
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+
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+// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
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+// unlockpt should be called before opening the slave side of a pty.
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+func unlockpt(f *os.File) error {
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+ panic("unlockpt() support requires cgo.")
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+}
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+
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+// ptsname retrieves the name of the first available pts for the given master.
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+func ptsname(f *os.File) (string, error) {
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+ n, err := unix.IoctlGetInt(int(f.Fd()), unix.TIOCGPTN)
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+ if err != nil {
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+ return "", err
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+ }
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+ return fmt.Sprintf("/dev/pts/%d", n), nil
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+}
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