sftp: add options for subsystem and server_command - fixes #1801
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c665201b85
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1 changed files with 44 additions and 1 deletions
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@ -164,6 +164,18 @@ Home directory can be found in a shared folder called "home"
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Default: false,
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Help: "Set to skip any symlinks and any other non regular files.",
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Advanced: true,
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}, {
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Name: "subsystem",
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Default: "sftp",
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Help: "Specifies the SSH2 subsystem on the remote host.",
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Advanced: true,
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}, {
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Name: "server_command",
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Default: "",
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Help: `Specifies the path or command to run a sftp server on the remote host.
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The subsystem option is ignored when server_command is defined.`,
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Advanced: true,
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}},
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}
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fs.Register(fsi)
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@ -187,6 +199,8 @@ type Options struct {
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Md5sumCommand string `config:"md5sum_command"`
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Sha1sumCommand string `config:"sha1sum_command"`
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SkipLinks bool `config:"skip_links"`
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Subsystem string `config:"subsystem"`
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ServerCommand string `config:"server_command"`
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}
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// Fs stores the interface to the remote SFTP files
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@ -290,7 +304,7 @@ func (f *Fs) sftpConnection() (c *conn, err error) {
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if err != nil {
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return nil, errors.Wrap(err, "couldn't connect SSH")
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}
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c.sftpClient, err = sftp.NewClient(c.sshClient)
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c.sftpClient, err = f.newSftpClient(c.sshClient)
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if err != nil {
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_ = c.sshClient.Close()
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return nil, errors.Wrap(err, "couldn't initialise SFTP")
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@ -299,6 +313,35 @@ func (f *Fs) sftpConnection() (c *conn, err error) {
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return c, nil
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}
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// Creates a new SFTP client on conn, using the specified subsystem
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// or sftp server, and zero or more option functions
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func (f *Fs) newSftpClient(conn *ssh.Client, opts ...sftp.ClientOption) (*sftp.Client, error) {
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s, err := conn.NewSession()
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if err != nil {
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return nil, err
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}
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pw, err := s.StdinPipe()
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if err != nil {
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return nil, err
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}
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pr, err := s.StdoutPipe()
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if err != nil {
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return nil, err
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}
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if f.opt.ServerCommand != "" {
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if err := s.Start(f.opt.ServerCommand); err != nil {
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return nil, err
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}
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} else {
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if err := s.RequestSubsystem(f.opt.Subsystem); err != nil {
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return nil, err
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}
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}
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return sftp.NewClientPipe(pr, pw, opts...)
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}
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// Get an SFTP connection from the pool, or open a new one
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func (f *Fs) getSftpConnection() (c *conn, err error) {
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f.poolMu.Lock()
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