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73 lines
2.3 KiB
Go
73 lines
2.3 KiB
Go
//go:build !plan9
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package sftp
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import "io"
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// Interfaces for ssh client and session implemented in ssh_internal.go and ssh_external.go
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// An interface for an ssh client to abstract over internal ssh library and external binary
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type sshClient interface {
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// Wait blocks until the connection has shut down, and returns the
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// error causing the shutdown.
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Wait() error
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// SendKeepAlive sends a keepalive message to keep the connection open
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SendKeepAlive()
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// Close the connection
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Close() error
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// NewSession opens a new sshSession for this sshClient. (A
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// session is a remote execution of a program.)
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NewSession() (sshSession, error)
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// CanReuse indicates if this client can be reused
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CanReuse() bool
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}
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// An interface for an ssh session to abstract over internal ssh library and external binary
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type sshSession interface {
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// Setenv sets an environment variable that will be applied to any
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// command executed by Shell or Run.
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Setenv(name, value string) error
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// Start runs cmd on the remote host. Typically, the remote
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// server passes cmd to the shell for interpretation.
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// A Session only accepts one call to Run, Start or Shell.
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Start(cmd string) error
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// StdinPipe returns a pipe that will be connected to the
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// remote command's standard input when the command starts.
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StdinPipe() (io.WriteCloser, error)
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// StdoutPipe returns a pipe that will be connected to the
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// remote command's standard output when the command starts.
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// There is a fixed amount of buffering that is shared between
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// stdout and stderr streams. If the StdoutPipe reader is
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// not serviced fast enough it may eventually cause the
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// remote command to block.
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StdoutPipe() (io.Reader, error)
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// RequestSubsystem requests the association of a subsystem
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// with the session on the remote host. A subsystem is a
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// predefined command that runs in the background when the ssh
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// session is initiated
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RequestSubsystem(subsystem string) error
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// Run runs cmd on the remote host. Typically, the remote
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// server passes cmd to the shell for interpretation.
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// A Session only accepts one call to Run, Start, Shell, Output,
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// or CombinedOutput.
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Run(cmd string) error
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// Close the session
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Close() error
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// Set the stdout
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SetStdout(io.Writer)
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// Set the stderr
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SetStderr(io.Writer)
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}
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