src/audit/audit-file.c

   1 /*
   2  * Copyright 2000, International Business Machines Corporation and others.
   3  * All Rights Reserved.
   4  *
   5  * This software has been released under the terms of the IBM Public
   6  * License.  For details, see the LICENSE file in the top-level source
   7  * directory or online at http://www.openafs.org/dl/license10.html
   8  */
   9
  10 #include <afsconfig.h>
  11 #include <afs/param.h>
  12
  13 #include <roken.h>
  14
  15 #include <afs/afsutil.h>
  16
  17 #include "audit-api.h"
  18
  19 static FILE *auditout;
  20
  21 static void
  22 send_msg(void)
  23 {
  24     fprintf(auditout, "\n");
  25     fflush(auditout);
  26 }
  27
  28 static void
  29 append_msg(const char *format, ...)
  30 {
  31     va_list vaList;
  32
  33     va_start(vaList, format);
  34     vfprintf(auditout, format, vaList);
  35     va_end(vaList);
  36 }
  37
  38 static int
  39 open_file(const char *fileName)
  40 {
  41     int tempfd, flags, r;
  42     char *oldName;
  43
  44 #ifndef AFS_NT40_ENV
  45     struct stat statbuf;
  46
  47     if ((lstat(fileName, &statbuf) == 0)
  48         && (S_ISFIFO(statbuf.st_mode))) {
  49         flags = O_WRONLY | O_NONBLOCK;
  50     } else
  51 #endif
  52     {
  53         r = asprintf(&oldName, "%s.old", fileName);
  54         if (r < 0 || oldName == NULL) {
  55             printf("Warning: Unable to create backup filename. Auditing ignored\n");
  56             return 1;
  57         }
  58         rk_rename(fileName, oldName);
  59         flags = O_WRONLY | O_TRUNC | O_CREAT;
  60         free(oldName);
  61     }
  62     tempfd = open(fileName, flags, 0666);
  63     if (tempfd > -1) {
  64         auditout = fdopen(tempfd, "a");
  65         if (!auditout) {
  66             printf("Warning: auditlog %s not writable, ignored.\n", fileName);
  67             return 1;
  68         }
  69     } else {
  70         printf("Warning: auditlog %s not writable, ignored.\n", fileName);
  71         return 1;
  72     }
  73     return 0;
  74 }
  75
  76 static void
  77 print_interface_stats(FILE *out)
  78 {
  79     return;
  80 }
  81
  82 const struct osi_audit_ops audit_file_ops = {
  83     &send_msg,
  84     &append_msg,
  85     &open_file,
  86     &print_interface_stats,
  87 };