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// Copyright 2023 The Sqlite 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 sqlite.dmesg
// +build sqlite.dmesg
package sqlite // import "modernc.org/sqlite"
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() {
t := time.Now()
// 01/02 03:04:05PM '06 -0700
dn := t.Format("sqlite-dmesg-2006-01-02-03-150405")
dn = filepath.Join(os.TempDir(), fmt.Sprintf("%s.%d", dn, os.Getpid()))
if err := os.Mkdir(dn, 0770); err != nil {
panic(err.Error())
}
fn := filepath.Join(dn, "dmesg.log")
var err error
if logf, err = os.OpenFile(fn, os.O_APPEND|os.O_CREATE|os.O_WRONLY|os.O_SYNC, 0644); err != nil {
panic(err.Error())
}
dmesg("%v", time.Now())
fmt.Fprintf(os.Stderr, "debug messages in %s\n", fn)
}
func dmesg(s string, args ...interface{}) {
if s == "" {
s = strings.Repeat("%v ", len(args))
}
s = fmt.Sprintf(pid+s, args...)
s += fmt.Sprintf(" (%v: %v:)", origin(3), origin(2))
switch {
case len(s) != 0 && s[len(s)-1] == '\n':
fmt.Fprint(logf, s)
default:
fmt.Fprintln(logf, s)
}
}
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