084c621c66
This also makes sure that devices are pointers to avoid copies Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
// +build linux
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package nodes
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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/libcontainer/devices"
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"github.com/dotcloud/docker/pkg/system"
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)
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// Create the device nodes in the container.
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func CreateDeviceNodes(rootfs string, nodesToCreate []*devices.Device) error {
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oldMask := system.Umask(0000)
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defer system.Umask(oldMask)
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for _, node := range nodesToCreate {
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if err := CreateDeviceNode(rootfs, node); err != nil {
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return err
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}
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}
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return nil
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}
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// Creates the device node in the rootfs of the container.
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func CreateDeviceNode(rootfs string, node *devices.Device) error {
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var (
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dest = filepath.Join(rootfs, node.Path)
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parent = filepath.Dir(dest)
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)
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if err := os.MkdirAll(parent, 0755); err != nil {
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return err
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}
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fileMode := node.FileMode
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switch node.Type {
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case 'c':
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fileMode |= syscall.S_IFCHR
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case 'b':
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fileMode |= syscall.S_IFBLK
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default:
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return fmt.Errorf("%c is not a valid device type for device %s", node.Type, node.Path)
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}
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if err := system.Mknod(dest, uint32(fileMode), devices.Mkdev(node.MajorNumber, node.MinorNumber)); err != nil && !os.IsExist(err) {
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return fmt.Errorf("mknod %s %s", node.Path, err)
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}
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return nil
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}
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