generate_reports.c

   1 /* @(#) $Id: ./src/monitord/generate_reports.c, 2011/09/08 dcid Exp $
   2  */
   3
   4 /* Copyright (C) 2010 Trend Micro Inc.
   5  * All right reserved.
   6  *
   7  * This program is a free software; you can redistribute it
   8  * and/or modify it under the terms of the GNU General Public
   9  * License (version 2) as published by the FSF - Free Software
  10  * Foundation
  11  */
  12
  13
  14 #include "shared.h"
  15 #include "monitord.h"
  16 int OS_SendCustomEmail(char **to, char *subject, char *smtpserver, char *from, char *idsname, FILE *fp, struct tm *p);
  17 char *(monthss[])={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug",
  18                   "Sep","Oct","Nov","Dec"};
  19
  20
  21 void generate_reports(int cday, int cmon, int cyear,struct tm *p)
  22 {
  23     int s = 0;
  24
  25     if(!mond.smtpserver)
  26     {
  27         return;
  28     }
  29
  30     if(mond.reports)
  31     {
  32         int twait = 0;
  33         int childcount = 0;
  34         while(mond.reports[s])
  35         {
  36             pid_t pid;
  37             if(mond.reports[s]->emailto == NULL)
  38             {
  39                 s++;
  40                 continue;
  41             }
  42
  43             /* We create a new process to run the report and send the email.
  44              * To avoid crashing monitord if something goes wrong.
  45              */
  46             pid = fork();
  47             if(pid < 0)
  48             {
  49                 merror("%s: ERROR: Fork failed. cause: %d - %s", ARGV0, errno, strerror(errno));
  50                 s++;
  51                 continue;
  52             }
  53             else if(pid == 0)
  54             {
  55                 char fname[256];
  56                 char aname[256];
  57                 fname[255] = '\0';
  58                 aname[255] = '\0';
  59                 snprintf(fname, 255, "/logs/.report-%d.log", getpid());
  60
  61                 merror("%s: INFO: Starting daily reporting for '%s'", ARGV0, mond.reports[s]->title);
  62                 mond.reports[s]->r_filter.fp = fopen(fname, "w+");
  63                 if(!mond.reports[s]->r_filter.fp)
  64                 {
  65                     merror("%s: ERROR: Unable to open temporary reports file.", ARGV0);
  66                     s++;
  67                     continue;
  68                 }
  69
  70
  71                 /* Opening the log file. */
  72                 snprintf(aname, 255, "%s/%d/%s/ossec-%s-%02d.log",
  73                          ALERTS, cyear, monthss[cmon], "alerts", cday);
  74                 os_strdup(aname, mond.reports[s]->r_filter.filename);
  75
  76
  77                 /* Starting report */
  78                 os_ReportdStart(&mond.reports[s]->r_filter);
  79                 fflush(mond.reports[s]->r_filter.fp);
  80
  81                 if(ftell(mond.reports[s]->r_filter.fp) < 10)
  82                 {
  83                     merror("%s: INFO: Report '%s' empty.", ARGV0, mond.reports[s]->title);
  84                 }
  85                 else if(OS_SendCustomEmail(mond.reports[s]->emailto, mond.reports[s]->title,
  86                         mond.smtpserver, mond.emailfrom, mond.emailidsname, mond.reports[s]->r_filter.fp, p) != 0)
  87                 {
  88                     merror("%s: WARN: Unable to send report email.", ARGV0);
  89                 }
  90                 fclose(mond.reports[s]->r_filter.fp);
  91                 unlink(fname);
  92                 free(mond.reports[s]->r_filter.filename);
  93                 mond.reports[s]->r_filter.filename = NULL;
  94
  95                 exit(0);
  96             }
  97             else
  98             {
  99                 /* Sleep between each report. Time is not important in here. */
 100                 sleep(20);
 101                 childcount++;
 102             }
 103
 104             s++;
 105         }
 106
 107
 108         while (childcount)
 109         {
 110             int wp;
 111             wp = waitpid((pid_t) -1, NULL, WNOHANG);
 112             if (wp < 0)
 113             {
 114                 merror(WAITPID_ERROR, ARGV0);
 115             }
 116             else if(wp == 0)
 117             {
 118                 /* If there is still any report left, sleep 5 and try again.*/
 119                 sleep(5);
 120                 twait++;
 121
 122                 if(twait > 2)
 123                 {
 124                     merror("%s: WARN: Report taking too long to complete. Waiting for it to finish...", ARGV0);
 125                     sleep(10);
 126                     if(twait > 10)
 127                     {
 128                         merror("%s: WARN: Report took too long. Moving on...", ARGV0);
 129                         break;
 130                     }
 131                 }
 132             }
 133             else
 134             {
 135                 childcount--;
 136             }
 137         }
 138     }
 139     return;
 140 }
 141
 142 /* EOF */