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dmesg.go (849B)

      1 // Copyright 2021 The CCGO Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style
      3 // license that can be found in the LICENSE file.
      4 
      5 //go:build ccgo.dmesg
      6 // +build ccgo.dmesg
      7 
      8 package ccgo // import "modernc.org/ccgo/v3/lib"
      9 
     10 import (
     11 	"fmt"
     12 	"os"
     13 	"path/filepath"
     14 	"strings"
     15 )
     16 
     17 const dmesgs = true
     18 
     19 var (
     20 	pid  = fmt.Sprintf("[%v %v] ", os.Getpid(), filepath.Base(os.Args[0]))
     21 	logf *os.File
     22 )
     23 
     24 func init() {
     25 	var err error
     26 	if logf, err = os.OpenFile("/tmp/ccgo.log", os.O_APPEND|os.O_CREATE|os.O_WRONLY|os.O_SYNC, 0644); err != nil {
     27 		panic(err.Error())
     28 	}
     29 }
     30 
     31 func dmesg(s string, args ...interface{}) {
     32 	if s == "" {
     33 		s = strings.Repeat("%v ", len(args))
     34 	}
     35 	s = fmt.Sprintf(s, args...)
     36 	s = pid + s
     37 	switch {
     38 	case len(s) != 0 && s[len(s)-1] == '\n':
     39 		fmt.Fprint(logf, s)
     40 	default:
     41 		fmt.Fprintln(logf, s)
     42 	}
     43 }