logger/log.go


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package logger

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

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

func openLogFile(datadir string, filename string) *os.File {
    path := ethutil.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)
    }

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

    return sys
}