// Command implements Client.Command.
func (c *OpenSSHClient) Command(host string, command []string, options *Options) *Cmd {
args := opensshOptions(options, sshKind)
args = append(args, host)
if len(command) > 0 {
args = append(args, command...)
}
bin, args := sshpassWrap("ssh", args)
logger.Debugf("running: %s %s", bin, utils.CommandString(args...))
return &Cmd{impl: &opensshCmd{exec.Command(bin, args...)}}
}
func opensshOptions(options *Options, commandKind opensshCommandKind) []string {
args := append([]string{}, opensshCommonOptions...)
if options == nil {
options = &Options{}
}
if len(options.proxyCommand) > 0 {
args = append(args, "-o", "ProxyCommand "+utils.CommandString(options.proxyCommand...))
}
if !options.passwordAuthAllowed {
args = append(args, "-o", "PasswordAuthentication no")
}
if options.allocatePTY {
args = append(args, "-t", "-t") // twice to force
}
identities := append([]string{}, options.identities...)
if pk := PrivateKeyFiles(); len(pk) > 0 {
// Add client keys as implicit identities
identities = append(identities, pk...)
}
// If any identities are specified, the
// default ones must be explicitly specified.
if len(identities) > 0 {
for _, identity := range defaultIdentities {
path, err := utils.NormalizePath(identity)
if err != nil {
logger.Warningf("failed to normalize path %q: %v", identity, err)
continue
}
if _, err := os.Stat(path); err == nil {
identities = append(identities, path)
}
}
}
for _, identity := range identities {
args = append(args, "-i", identity)
}
if options.port != 0 {
port := fmt.Sprint(options.port)
if commandKind == scpKind {
// scp uses -P instead of -p (-p means preserve).
args = append(args, "-P", port)
} else {
args = append(args, "-p", port)
}
}
return args
}
// Copy implements Client.Copy.
func (c *OpenSSHClient) Copy(args []string, userOptions *Options) error {
var options Options
if userOptions != nil {
options = *userOptions
options.allocatePTY = false // doesn't make sense for scp
}
allArgs := opensshOptions(&options, scpKind)
allArgs = append(allArgs, args...)
bin, allArgs := sshpassWrap("scp", allArgs)
cmd := exec.Command(bin, allArgs...)
var stderr bytes.Buffer
cmd.Stderr = &stderr
logger.Debugf("running: %s %s", bin, utils.CommandString(args...))
if err := cmd.Run(); err != nil {
stderr := strings.TrimSpace(stderr.String())
if len(stderr) > 0 {
err = fmt.Errorf("%v (%v)", err, stderr)
}
return err
}
return nil
}