tools/ktrans.cc

   1 //
   2 // ktrans.cc - print human readable version of usbfs_snoop kernel log
   3 //
   4
   5 /*
   6     Copyright (C) 2005-2007, Net Direct Inc. (http://www.netdirect.ca/)
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  16
  17     See the GNU General Public License in the COPYING file at the
  18     root directory of this project for more details.
  19 */
  20
  21 #include <iostream>
  22 #include <iomanip>
  23 #include <sstream>
  24 #include <string>
  25 #include <string.h>
  26 #include <barry/data.h>
  27
  28 using namespace std;
  29
  30 void Usage()
  31 {
  32         cout << "ktrans - usbfs_snoop kernel log translator\n"
  33                 "\n"
  34                 "\tUsage:   ktrans logmarker < log\n"
  35                 "\n"
  36                 "\tExample:  ktrans \"kernel: \" < /var/log/kern.log\n"
  37                 "\n";
  38 }
  39
  40 bool IsHexData(const char *logmarker, const char *str)
  41 {
  42         str = strstr(str, logmarker);
  43         if( !str )
  44                 return false;
  45         str += strlen(logmarker);
  46
  47         if( strstr(str, "data ") || strstr(str, "data: ") ) {
  48                 // looks like a data line, make sure data from there on out
  49                 // is hex data
  50
  51                 // skip "data"
  52                 str = strstr(str, "data") + 4;
  53                 for( ; *str == ':' || *str == ' '; str++ )
  54                         ;
  55
  56                 while( *str ) {
  57                         if( !( isdigit(*str) || *str == ' ' ||
  58                             (*str >= 'a' && *str <= 'f')) )
  59                                 return false;
  60                         str++;
  61                 }
  62
  63                 return true;
  64         }
  65         else {
  66                 while( *str ) {
  67                         if( !( isdigit(*str) || *str == ' ' ||
  68                             (*str >= 'a' && *str <= 'f')) )
  69                                 return false;
  70                         str++;
  71                 }
  72                 return true;    // all data is numeric, so this is a continuation line
  73         }
  74 }
  75
  76 void SplitHex(const char *logmarker, const char *str, Barry::Data &data)
  77 {
  78         const char *hexptr = strstr(str, logmarker);
  79         if( !hexptr ) {
  80                 cout << str << endl;
  81                 return;
  82         }
  83         hexptr += strlen(logmarker);
  84         std::string readable(str, hexptr - str);
  85
  86         str = hexptr;
  87
  88         hexptr = strstr(str, "data ");
  89         if( hexptr ) {
  90                 hexptr += 5;
  91         }
  92         else {
  93                 hexptr = strstr(str, "data: ");
  94                 if( hexptr )
  95                         hexptr += 6;
  96         }
  97
  98         if( !hexptr )
  99                 hexptr = str;
 100
 101         for( ; *hexptr == ':' || *hexptr == ' '; hexptr++ )
 102                 ;
 103
 104         readable.append(str, hexptr - str);
 105         cout << readable << endl;
 106
 107         data.AppendHexString(hexptr);
 108 }
 109
 110 int main(int argc, char *argv[])
 111 {
 112         cout.sync_with_stdio(false);
 113
 114         if( argc < 2 ) {
 115                 Usage();
 116                 return 0;
 117         }
 118
 119         Barry::Data data;
 120         while( cin ) {
 121                 std::string buff;
 122                 getline(cin, buff);
 123                 if( IsHexData(argv[1], buff.c_str()) ) {
 124                         SplitHex(argv[1], buff.c_str(), data);
 125                 }
 126                 else {
 127                         if( data.GetSize() ) {
 128                                 cout << data;
 129                                 data.Zap();
 130                         }
 131                         cout << buff << "\n";
 132                 }
 133         }
 134
 135         if( data.GetSize() ) {
 136                 cout << data;
 137         }
 138 }
 139