path: root/logger/log.go

// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package logger

import (
    "fmt"
    "io"
    "log"
    "os"

    "github.com/ethereum/go-ethereum/common"
)

func openLogFile(datadir string, filename string) *os.File {
    path := common.AbsolutePath(datadir, filename)
    file, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
    if err != nil {
        panic(fmt.Sprintf("error opening log file '%s': %v", filename, err))
    }
    return file
}

func New(datadir string, logFile string, logLevel int) LogSystem {
    var writer io.Writer
    if logFile == "" {
        writer = os.Stdout
    } else {
        writer = openLogFile(datadir, logFile)
    }

    var sys LogSystem
    sys = NewStdLogSystem(writer, log.LstdFlags, LogLevel(logLevel))
    AddLogSystem(sys)

    return sys
}

func NewJSONsystem(datadir string, logFile string) LogSystem {
    var writer io.Writer
    if logFile == "-" {
        writer = os.Stdout
    } else {
        writer = openLogFile(datadir, logFile)
    }

    var sys LogSystem
    sys = NewJsonLogSystem(writer)
    AddLogSystem(sys)

    return sys
}