73479bab26
- OS custom internal package for file system interaction - Remove fileManager external dependency - Closer API to Go's native API on the OS - Create directories at startup - Better testability - Move Unsetenv to os interface
52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
package openvpn
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import (
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"fmt"
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"os"
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"github.com/qdm12/gluetun/internal/constants"
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"golang.org/x/sys/unix"
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)
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// CheckTUN checks the tunnel device is present and accessible.
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func (c *configurator) CheckTUN() error {
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c.logger.Info("checking for device %s", constants.TunnelDevice)
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f, err := c.os.OpenFile(string(constants.TunnelDevice), os.O_RDWR, 0)
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if err != nil {
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return fmt.Errorf("TUN device is not available: %w", err)
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}
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if err := f.Close(); err != nil {
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c.logger.Warn("Could not close TUN device file: %s", err)
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}
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return nil
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}
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func (c *configurator) CreateTUN() error {
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c.logger.Info("creating %s", constants.TunnelDevice)
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if err := c.os.MkdirAll("/dev/net", 0751); err != nil {
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return err
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}
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const (
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major = 10
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minor = 200
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)
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dev := c.mkDev(major, minor)
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if err := c.mkNod(string(constants.TunnelDevice), unix.S_IFCHR, int(dev)); err != nil {
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return err
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}
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const filepath = string(constants.TunnelDevice)
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file, err := c.os.OpenFile(filepath, os.O_WRONLY, 0666)
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if err != nil {
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return err
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}
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const readWriteAllPerms os.FileMode = 0666
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if err := file.Chmod(readWriteAllPerms); err != nil {
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_ = file.Close()
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return err
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}
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return file.Close()
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}
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