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      1 /*
      2  * Copyright (C) 2006 Tresys Technology, LLC
      3  *
      4  *  This library is free software; you can redistribute it and/or
      5  *  modify it under the terms of the GNU Lesser General Public
      6  *  License as published by the Free Software Foundation; either
      7  *  version 2.1 of the License, or (at your option) any later version.
      8  *
      9  *  This library is distributed in the hope that it will be useful,
     10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  *  Lesser General Public License for more details.
     13  *
     14  *  You should have received a copy of the GNU Lesser General Public
     15  *  License along with this library; if not, write to the Free Software
     16  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
     17  */
     18 
     19 #ifndef _SEPOL_INTERNAL_DEBUG_H_
     20 #define _SEPOL_INTERNAL_DEBUG_H_
     21 
     22 #include <stdio.h>
     23 #include <sepol/debug.h>
     24 #include "dso.h"
     25 #include "handle.h"
     26 
     27 #define STATUS_SUCCESS 0
     28 #define STATUS_ERR -1
     29 #define STATUS_NODATA 1
     30 
     31 /* FIXME: this needs to become a real function. Declaring variables
     32  * in a macro is _evil_ as it can shadow other variables in local scope.
     33  * The variable h has been renamed to _sepol_h to reduce this chance, but
     34  * it is still wrong.
     35  */
     36 #define msg_write(handle_arg, level_arg,			   \
     37 		  channel_arg, func_arg, ...) do {		   \
     38 		sepol_handle_t *_sepol_h = (handle_arg) ?: &sepol_compat_handle; \
     39 		if (_sepol_h->msg_callback) {			   \
     40 			_sepol_h->msg_fname = func_arg;		   \
     41 			_sepol_h->msg_channel = channel_arg;	   \
     42 			_sepol_h->msg_level = level_arg;	   \
     43 								   \
     44 			_sepol_h->msg_callback(			   \
     45 				_sepol_h->msg_callback_arg,	   \
     46 				_sepol_h, __VA_ARGS__);		   \
     47 		}                                                  \
     48 	} while(0)
     49 
     50 #define ERR(handle, ...) \
     51 	msg_write(handle, SEPOL_MSG_ERR, "libsepol", \
     52 	__FUNCTION__, __VA_ARGS__)
     53 
     54 #define INFO(handle, ...) \
     55 	msg_write(handle, SEPOL_MSG_INFO, "libsepol", \
     56 	__FUNCTION__, __VA_ARGS__)
     57 
     58 #define WARN(handle, ...) \
     59 	msg_write(handle, SEPOL_MSG_WARN, "libsepol", \
     60 	__FUNCTION__, __VA_ARGS__)
     61 
     62 #ifdef __GNUC__
     63 __attribute__ ((format(printf, 3, 4)))
     64 #endif
     65 extern void hidden sepol_msg_default_handler(void *varg,
     66 					     sepol_handle_t * msg,
     67 					     const char *fmt, ...);
     68 
     69 extern struct sepol_handle sepol_compat_handle;
     70 
     71 hidden_proto(sepol_msg_get_channel)
     72     hidden_proto(sepol_msg_get_fname)
     73     hidden_proto(sepol_msg_get_level)
     74 #endif
     75