github.com/mprishchepo/go-ethereum@v1.9.7-0.20191031044858-21506be82b68/node/errors.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package node
    18  
    19  import (
    20  	"errors"
    21  	"fmt"
    22  	"reflect"
    23  	"syscall"
    24  )
    25  
    26  var (
    27  	ErrDatadirUsed    = errors.New("datadir already used by another process")
    28  	ErrNodeStopped    = errors.New("node not started")
    29  	ErrNodeRunning    = errors.New("node already running")
    30  	ErrServiceUnknown = errors.New("unknown service")
    31  
    32  	datadirInUseErrnos = map[uint]bool{11: true, 32: true, 35: true}
    33  )
    34  
    35  func convertFileLockError(err error) error {
    36  	if errno, ok := err.(syscall.Errno); ok && datadirInUseErrnos[uint(errno)] {
    37  		return ErrDatadirUsed
    38  	}
    39  	return err
    40  }
    41  
    42  // DuplicateServiceError is returned during Node startup if a registered service
    43  // constructor returns a service of the same type that was already started.
    44  type DuplicateServiceError struct {
    45  	Kind reflect.Type
    46  }
    47  
    48  // Error generates a textual representation of the duplicate service error.
    49  func (e *DuplicateServiceError) Error() string {
    50  	return fmt.Sprintf("duplicate service: %v", e.Kind)
    51  }
    52  
    53  // StopError is returned if a Node fails to stop either any of its registered
    54  // services or itself.
    55  type StopError struct {
    56  	Server   error
    57  	Services map[reflect.Type]error
    58  }
    59  
    60  // Error generates a textual representation of the stop error.
    61  func (e *StopError) Error() string {
    62  	return fmt.Sprintf("server: %v, services: %v", e.Server, e.Services)
    63  }