LCOV - code coverage report
Current view: top level - src - debug.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 5 69 7.2 %
Date: 2016-09-12 12:21:44 Functions: 1 5 20.0 %

          Line data    Source code
       1             : /* debug.c - helpful output in desperate situations
       2             :    Copyright (C) 2000 Werner Koch (dd9jn)
       3             :    Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2009 g10 Code GmbH
       4             : 
       5             :    This file is part of Assuan.
       6             : 
       7             :    Assuan is free software; you can redistribute it and/or modify it
       8             :    under the terms of the GNU Lesser General Public License as
       9             :    published by the Free Software Foundation; either version 2.1 of
      10             :    the License, or (at your option) any later version.
      11             : 
      12             :    Assuan is distributed in the hope that it will be useful, but
      13             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :    Lesser General Public License for more details.
      16             : 
      17             :    You should have received a copy of the GNU Lesser General Public
      18             :    License along with this program; if not, write to the Free Software
      19             :    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
      20             :    MA 02110-1301, USA.  */
      21             : 
      22             : #if HAVE_CONFIG_H
      23             : #include <config.h>
      24             : #endif
      25             : #include <stdio.h>
      26             : #include <stdlib.h>
      27             : #include <string.h>
      28             : #include <stdarg.h>
      29             : #ifdef HAVE_UNISTD_H
      30             : # include <unistd.h>
      31             : #endif
      32             : #include <ctype.h>
      33             : #include <errno.h>
      34             : #ifndef HAVE_DOSISH_SYSTEM
      35             : # include <sys/types.h>
      36             : # include <sys/stat.h>
      37             : # include <fcntl.h>
      38             : #endif
      39             : #include <assert.h>
      40             : 
      41             : #include "assuan-defs.h"
      42             : #include "debug.h"
      43             : 
      44             : 
      45             : /* Log the formatted string FORMAT at debug category CAT higher.  */
      46             : void
      47          62 : _assuan_debug (assuan_context_t ctx, unsigned int cat, const char *format, ...)
      48             : {
      49             :   va_list arg_ptr;
      50             :   int saved_errno;
      51             :   char *msg;
      52             :   int res;
      53             : 
      54             :   /* vasprintf is an expensive operation thus we first check whether
      55             :      the callback has enabled CAT for logging.  */
      56          62 :   if (!ctx
      57          62 :       || !ctx->log_cb
      58          62 :       || !(*ctx->log_cb) (ctx, ctx->log_cb_data, cat, NULL))
      59         124 :     return;
      60             : 
      61           0 :   saved_errno = errno;
      62           0 :   va_start (arg_ptr, format);
      63           0 :   res = gpgrt_vasprintf (&msg, format, arg_ptr);
      64           0 :   va_end (arg_ptr);
      65           0 :   if (res < 0)
      66           0 :     return;
      67           0 :   ctx->log_cb (ctx, ctx->log_cb_data, cat, msg);
      68           0 :   free (msg);
      69           0 :   gpg_err_set_errno (saved_errno);
      70             : }
      71             : 
      72             : 
      73             : /* Start a new debug line in *LINE, logged at level LEVEL or higher,
      74             :    and starting with the formatted string FORMAT.  */
      75             : void
      76           0 : _assuan_debug_begin (assuan_context_t ctx,
      77             :                      void **line, unsigned int cat, const char *format, ...)
      78             : {
      79             :   va_list arg_ptr;
      80             :   int res;
      81             : 
      82           0 :   *line = NULL;
      83             :   /* Probe if this wants to be logged based on category.  */
      84           0 :   if (! ctx
      85           0 :       || ! ctx->log_cb
      86           0 :       || ! (*ctx->log_cb) (ctx, ctx->log_cb_data, cat, NULL))
      87           0 :     return;
      88             : 
      89           0 :   va_start (arg_ptr, format);
      90           0 :   res = gpgrt_vasprintf ((char **) line, format, arg_ptr);
      91           0 :   va_end (arg_ptr);
      92           0 :   if (res < 0)
      93           0 :     *line = NULL;
      94             : }
      95             : 
      96             : 
      97             : /* Add the formatted string FORMAT to the debug line *LINE.  */
      98             : void
      99           0 : _assuan_debug_add (assuan_context_t ctx, void **line, const char *format, ...)
     100             : {
     101             :   va_list arg_ptr;
     102             :   char *toadd;
     103             :   char *result;
     104             :   int res;
     105             : 
     106           0 :   if (!*line)
     107           0 :     return;
     108             : 
     109           0 :   va_start (arg_ptr, format);
     110           0 :   res = gpgrt_vasprintf (&toadd, format, arg_ptr);
     111           0 :   va_end (arg_ptr);
     112           0 :   if (res < 0)
     113             :     {
     114           0 :       free (*line);
     115           0 :       *line = NULL;
     116             :     }
     117           0 :   res = gpgrt_asprintf (&result, "%s%s", *(char **) line, toadd);
     118           0 :   free (toadd);
     119           0 :   free (*line);
     120           0 :   if (res < 0)
     121           0 :     *line = NULL;
     122             :   else
     123           0 :     *line = result;
     124             : }
     125             : 
     126             : 
     127             : /* Finish construction of *LINE and send it to the debug output
     128             :    stream.  */
     129             : void
     130           0 : _assuan_debug_end (assuan_context_t ctx, void **line, unsigned int cat)
     131             : {
     132           0 :   if (!*line)
     133           0 :     return;
     134             : 
     135             :   /* Force logging here by using category ~0.  */
     136           0 :   _assuan_debug (ctx, ~0, "%s", *line);
     137           0 :   free (*line);
     138           0 :   *line = NULL;
     139             : }
     140             : 
     141             : 
     142             : #define TOHEX(val) (((val) < 10) ? ((val) + '0') : ((val) - 10 + 'a'))
     143             : 
     144             : void
     145           0 : _assuan_debug_buffer (assuan_context_t ctx, unsigned int cat,
     146             :                       const char *const fmt, const char *const func,
     147             :                       const char *const tagname, void *tag,
     148             :                       const char *const buffer, size_t len)
     149             : {
     150           0 :   int idx = 0;
     151             :   int j;
     152             : 
     153             :   /* Probe if this wants to be logged based on category.  */
     154           0 :   if (!ctx
     155           0 :       || ! ctx->log_cb
     156           0 :       || ! (*ctx->log_cb) (ctx, ctx->log_cb_data, cat, NULL))
     157           0 :     return;
     158             : 
     159           0 :   while (idx < len)
     160             :     {
     161             :       char str[51];
     162           0 :       char *strp = str;
     163           0 :       char *strp2 = &str[34];
     164             : 
     165           0 :       for (j = 0; j < 16; j++)
     166             :         {
     167             :           unsigned char val;
     168           0 :           if (idx < len)
     169             :             {
     170           0 :               val = buffer[idx++];
     171           0 :               *(strp++) = TOHEX (val >> 4);
     172           0 :               *(strp++) = TOHEX (val % 16);
     173           0 :               *(strp2++) = isprint (val) ? val : '.';
     174             :             }
     175             :           else
     176             :             {
     177           0 :               *(strp++) = ' ';
     178           0 :               *(strp++) = ' ';
     179             :             }
     180           0 :           if (j == 7)
     181           0 :             *(strp++) = ' ';
     182             :         }
     183           0 :       *(strp++) = ' ';
     184           0 :       *(strp2++) = '\n';
     185           0 :       *(strp2) = '\0';
     186             : 
     187           0 :       _assuan_debug (ctx, cat, fmt, func, tagname, tag, str);
     188             :     }
     189             : }

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