Update vendored library github.com/pkg/sftp

vendor/github.com/pkg/sftp/request-errors.go

@@ -0,0 +1,42 @@
+package sftp
+
+// Error types that match the SFTP's SSH_FXP_STATUS codes. Gives you more
+// direct control of the errors being sent vs. letting the library work them
+// out from the standard os/io errors.
+
+type fxerr uint32
+
+const (
+	ErrSshFxOk               = fxerr(ssh_FX_OK)
+	ErrSshFxEof              = fxerr(ssh_FX_EOF)
+	ErrSshFxNoSuchFile       = fxerr(ssh_FX_NO_SUCH_FILE)
+	ErrSshFxPermissionDenied = fxerr(ssh_FX_PERMISSION_DENIED)
+	ErrSshFxFailure          = fxerr(ssh_FX_FAILURE)
+	ErrSshFxBadMessage       = fxerr(ssh_FX_BAD_MESSAGE)
+	ErrSshFxNoConnection     = fxerr(ssh_FX_NO_CONNECTION)
+	ErrSshFxConnectionLost   = fxerr(ssh_FX_CONNECTION_LOST)
+	ErrSshFxOpUnsupported    = fxerr(ssh_FX_OP_UNSUPPORTED)
+)
+
+func (e fxerr) Error() string {
+	switch e {
+	case ErrSshFxOk:
+		return "OK"
+	case ErrSshFxEof:
+		return "EOF"
+	case ErrSshFxNoSuchFile:
+		return "No Such File"
+	case ErrSshFxPermissionDenied:
+		return "Permission Denied"
+	case ErrSshFxBadMessage:
+		return "Bad Message"
+	case ErrSshFxNoConnection:
+		return "No Connection"
+	case ErrSshFxConnectionLost:
+		return "Connection Lost"
+	case ErrSshFxOpUnsupported:
+		return "Operation Unsupported"
+	default:
+		return "Failure"
+	}
+}