fd5a5dc56f
Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume@charmes.net> (github: creack)
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
// +build linux
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package console
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import (
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"fmt"
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"os"
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"path/filepath"
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"syscall"
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"github.com/dotcloud/docker/pkg/label"
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"github.com/dotcloud/docker/pkg/system"
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)
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// Setup initializes the proper /dev/console inside the rootfs path
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func Setup(rootfs, consolePath, mountLabel string) error {
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oldMask := system.Umask(0000)
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defer system.Umask(oldMask)
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stat, err := os.Stat(consolePath)
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if err != nil {
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return fmt.Errorf("stat console %s %s", consolePath, err)
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}
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var (
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st = stat.Sys().(*syscall.Stat_t)
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dest = filepath.Join(rootfs, "dev/console")
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)
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if err := os.Remove(dest); err != nil && !os.IsNotExist(err) {
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return fmt.Errorf("remove %s %s", dest, err)
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}
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if err := os.Chmod(consolePath, 0600); err != nil {
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return err
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}
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if err := os.Chown(consolePath, 0, 0); err != nil {
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return err
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}
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if err := system.Mknod(dest, (st.Mode&^07777)|0600, int(st.Rdev)); err != nil {
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return fmt.Errorf("mknod %s %s", dest, err)
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}
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if err := label.SetFileLabel(consolePath, mountLabel); err != nil {
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return fmt.Errorf("set file label %s %s", dest, err)
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}
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return nil
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}
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func OpenAndDup(consolePath string) error {
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slave, err := system.OpenTerminal(consolePath, syscall.O_RDWR)
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if err != nil {
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return fmt.Errorf("open terminal %s", err)
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}
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if err := system.Dup2(slave.Fd(), 0); err != nil {
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return err
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}
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if err := system.Dup2(slave.Fd(), 1); err != nil {
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return err
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}
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return system.Dup2(slave.Fd(), 2)
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}
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