src/nobug_rbdump.c

   1 /*
   2  This file is part of the NoBug debugging library.
   3
   4  Copyright (C)
   5    2008,                        Simeon Voelkel <simeon_voelkel@arcor.de>
   6    2008, 2009                   Christian Thaeter <ct@pipapo.org>
   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.  See the
  16  GNU General Public License for more details.
  17
  18  You should have received a copy of the GNU General Public License
  19  along with this program; if not, contact Christian Thaeter <ct@pipapo.org>.
  20 */
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <sys/types.h>
  25 #include <sys/stat.h>
  26 #include <unistd.h>
  27
  28
  29 #define NOBUG_LIBNOBUG_C
  30 #include "nobug.h"
  31
  32 /*
  33 //rbdump HEAD- Dumping Persistent Ringbuffers; rbdump; dumping persistent ringbuffers
  34 //rbdump
  35 //rbdump NoBug installs the `nobug_rbdump` tool for dumping the content of a persistent
  36 //rbdump ringbuffer. It is invoked with the filename of the ringbuffer, the content is then
  37 //rbdump printed to stdout.
  38 //rbdump
  39 */
  40 int
  41 main(int argc, char* argv[])
  42 {
  43   struct stat filestat;
  44
  45   if (argc < 2)
  46     {
  47       printf( "usage: %s file\n\n"
  48               "  nobug ringbuffer dump\n\n"
  49               "  Copyright (C)\n"
  50               "    2008,               Simeon Voelkel <simeon_voelkel@arcor.de>\n\n"
  51               "  This is free software.  You may redistribute copies of it under the terms of\n"
  52               "  the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.\n"
  53               "  There is NO WARRANTY, to the extent permitted by law.\n\n",
  54               argv[0]
  55               );
  56       return 1;
  57     }
  58   if (argv[1] != NULL)
  59     {
  60       if (stat(argv[1], &filestat))
  61         {
  62           fprintf (stderr, "Can't stat file %s\n", argv[1]);
  63           return 2;
  64         }
  65
  66       struct nobug_ringbuffer rb;
  67
  68       /* using the file size for the guard too is quite excessive but the only way to be 100% sure any ringbuffer can be read */
  69       if (!nobug_ringbuffer_init (&rb, filestat.st_size, filestat.st_size, argv[1], NOBUG_RINGBUFFER_KEEP|NOBUG_RINGBUFFER_APPEND))
  70         {
  71           fprintf (stderr, "Error opening ringbuffer %s\n", argv[1]);
  72           return 3;
  73         }
  74
  75       nobug_ringbuffer_save (&rb, stdout);
  76     }
  77
  78   return 0;
  79 }