1  /*
       2   * debug.c: debugging messages
       3   *
       4   * Copyright (C) 2007 Colin Watson.
       5   *
       6   * This file is part of man-db.
       7   *
       8   * man-db is free software; you can redistribute it and/or modify it
       9   * 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   * man-db is distributed in the hope that it will be useful, but
      14   * 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 man-db; if not, write to the Free Software Foundation,
      20   * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
      21   */
      22  
      23  #ifdef HAVE_CONFIG_H
      24  #  include "config.h"
      25  #endif
      26  
      27  #include <stdbool.h>
      28  #include <stdlib.h>
      29  #include <stdio.h>
      30  #include <stdarg.h>
      31  #include <string.h>
      32  #include <errno.h>
      33  
      34  #include "attribute.h"
      35  
      36  #include "manconfig.h"
      37  
      38  #include "debug.h"
      39  
      40  bool debug_level = false;
      41  
      42  void init_debug (void)
      43  {
      44  	const char *man_debug = getenv ("MAN_DEBUG");
      45  	if (man_debug && STREQ (man_debug, "1"))
      46  		debug_level = true;
      47  }
      48  
      49  static void ATTRIBUTE_FORMAT ((__printf__, 1, 0)) vdebug (const char *message,
      50  							  va_list args)
      51  {
      52  	if (debug_level)
      53  		vfprintf (stderr, message, args);
      54  }
      55  
      56  void debug (const char *message, ...)
      57  {
      58  	if (debug_level) {
      59  		va_list args;
      60  
      61  		va_start (args, message);
      62  		vdebug (message, args);
      63  		va_end (args);
      64  	}
      65  }
      66  
      67  void debug_error (const char *message, ...)
      68  {
      69  	if (debug_level) {
      70  		va_list args;
      71  
      72  		va_start (args, message);
      73  		vdebug (message, args);
      74  		va_end (args);
      75  
      76  		debug (": %s\n", strerror (errno));
      77  	}
      78  }