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// Copyright 2020 The Libc Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build libc.dmesg
// +build libc.dmesg
package libc // import "modernc.org/libc"
import (
"fmt"
"os"
"path/filepath"
"strings"
"time"
)
const dmesgs = true
var (
pid = fmt.Sprintf("[%v %v] ", os.Getpid(), filepath.Base(os.Args[0]))
logf *os.File
)
func init() {
var err error
if logf, err = os.OpenFile("/tmp/libc.log", os.O_APPEND|os.O_CREATE|os.O_WRONLY|os.O_SYNC, 0644); err != nil {
panic(err.Error())
}
dmesg("%v", time.Now())
}
func dmesg(s string, args ...interface{}) {
if s == "" {
s = strings.Repeat("%v ", len(args))
}
s = fmt.Sprintf(pid+s, args...)
switch {
case len(s) != 0 && s[len(s)-1] == '\n':
fmt.Fprint(logf, s)
default:
fmt.Fprintln(logf, s)
}
}
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