xdm_file.c

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/*----------------------------------------------------------------------------
 * Copyright (c) 2006, Novell, Inc.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are 
 * met:
 * 
 *     * Redistributions of source code must retain the above copyright 
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright 
 *       notice, this list of conditions and the following disclaimer in the 
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Novell nor the names of its contributors 
 *       may be used to endorse or promote products derived from this 
 *       software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *--------------------------------------------------------------------------*/

#include <stdio.h>
#include <string.h>

#ifndef _WIN32
# include <sys/types.h>
# include <sys/stat.h>
#endif

#ifdef _WIN32
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# define strnenv(d,s,n) (ExpandEnvironmentStringsA((LPCSTR)(s),(LPSTR)(d),(n)-1),(d))
# define XDM_ALOGPATH   "%SystemRoot%"
# define XDMAPI __cdecl
# define XDMEXP __declspec(dllexport)
# define FOPEN_FLAGSTR  "ab"
#else
# define strnenv(d,s,n) ((strncpy((d),(s),(n)-1)[(n)-1] = 0),(d))
# define XDM_ALOGPATH   LSTDIR "/log"
# define XDMAPI
# define XDMEXP
# define FOPEN_FLAGSTR  "a"
#endif

#define XDM_ALOGFNAME   "xdas_audit.log"

#define XDM_DEF_ALOGFILE XDM_ALOGPATH "/" XDM_ALOGFNAME

static char s_alogfile[FILENAME_MAX];

static FILE * s_file = 0;

static void (*s_fplogmsg)(int level, const char * msg, ... ) = 0;

XDMEXP int XDMAPI xdm_append(const char ** msgflds)
{
   if (fprintf(s_file, "%s\n", msgflds[0]) 
         < (int)(msgflds[33] - msgflds[0] - 1) || fflush(s_file) != 0)
      return -1;
   return 0;
}

XDMEXP int XDMAPI xdm_init(void (*logmsg)(int level, const char * msg, ... ),
      char * (*getcnfstr)(const char *, char *, size_t *))
{
   size_t bufsz = sizeof(s_alogfile);

   s_fplogmsg = logmsg; /* save logmsg function pointer */

   (*getcnfstr)("xdasd.loggers.file.alogname", s_alogfile, &bufsz);
   if (bufsz == 0)
      (void)strnenv(s_alogfile, XDM_DEF_ALOGFILE, sizeof(XDM_DEF_ALOGFILE));

   (*s_fplogmsg)(0, "xdm_file: Audit log file: %s\n", s_alogfile);

#ifndef _WIN32
   umask(026); /* ensure files created with 0666 end up with 0640 */
#endif

   if ((s_file = fopen(s_alogfile, FOPEN_FLAGSTR)) == 0)
      return -1;
   return 0;
}

XDMEXP void XDMAPI xdm_exit(void)
{
   if (s_file != 0)
   {
      fclose(s_file);
      s_file = 0;
   }
}