config.cxx

   1 /*
   2  * inoclam - Inotify+ClamAV virus scanner
   3  * Copyright (C) 2007 Vermont Department of Taxes
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  * Contributor(s):
  20  *   Tom Cort <tom.cort@state.vt.us>
  21  */
  22
  23 #include <confuse.h>
  24 #include <libdaemon/dlog.h>
  25 #include <unistd.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <string.h>
  29 #include <strings.h>
  30 #include <errno.h>
  31 #include <unistd.h>
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34
  35 #include "config.hxx"
  36 #include "inotify.hxx"
  37 #include "smtp.hxx"
  38
  39 /**
  40  * Checks if the configuration file exists as a regular file.
  41  * @return Returns 1 if the file exists and is regular, else 0.
  42  */
  43 static int config_file_exists()
  44 {
  45         struct stat s;
  46
  47         /* No config file defined - NULL Pointer Check */
  48         if (!DEFAULT_CONFIGFILE) {
  49                 return 0;
  50         }
  51
  52         /* File exists? */
  53         if (stat(DEFAULT_CONFIGFILE, &s) < 0) {
  54                 return 0;
  55         }
  56
  57         /* File is a regular file? */
  58         if (!S_ISREG(s.st_mode)) {
  59                 return 0;
  60         }
  61
  62         return 1;
  63 }
  64
  65 /**
  66  * Release any resources that hold configuration information.
  67  * This function effectively resets all configurable values.
  68  * It should be called at the end of the program.
  69  */
  70 void config_free()
  71 {
  72         if (watch_dir != NULL) {
  73                 free(watch_dir);
  74                 watch_dir = NULL;
  75         }
  76
  77         virus_removal_enabled = cfg_true;
  78
  79         smtp_enabled = cfg_true;
  80
  81         if (smtp_host != NULL) {
  82                 free(smtp_host);
  83                 smtp_host = NULL;
  84         }
  85
  86         smtp_port = 0;
  87
  88         if (smtp_to != NULL) {
  89                 free(smtp_to);
  90                 smtp_to = NULL;
  91         }
  92
  93         if (smtp_from != NULL) {
  94                 free(smtp_from);
  95                 smtp_from = NULL;
  96         }
  97
  98         if (smtp_subject != NULL) {
  99                 free(smtp_subject);
 100                 smtp_subject = NULL;
 101         }
 102 }
 103
 104 /**
 105  * Examines each value of the current configuration.
 106  * If a value was not set, it is set to the default.
 107  */
 108 static void config_with_defaults()
 109 {
 110         if (watch_dir == NULL) {
 111                 watch_dir = strdup(WATCH_DIR);
 112         }
 113
 114         if (smtp_host == NULL) {
 115                 smtp_host = strdup(SMTP_HOST);
 116         }
 117
 118         if (smtp_port == 0) {
 119                 smtp_port = SMTP_PORT;
 120         }
 121
 122         if (smtp_to == NULL) {
 123                 smtp_to = strdup(SMTP_TO);
 124         }
 125
 126         if (smtp_from == NULL) {
 127                 smtp_from = strdup(SMTP_FROM);
 128         }
 129
 130         if (smtp_subject == NULL) {
 131                 smtp_subject = strdup(SMTP_SUBJECT);
 132         }
 133 }
 134
 135 /**
 136  * Parses an inoclam.conf configuration file.
 137  */
 138 void config_parse()
 139 {
 140         int rc;
 141
 142         config_free();
 143
 144         cfg_t *cfg;
 145         cfg_opt_t opts[] = {
 146                 CFG_SIMPLE_STR("watch_dir", &watch_dir),
 147                 CFG_SIMPLE_BOOL("virus_removal_enabled", &virus_removal_enabled),
 148                 CFG_SIMPLE_BOOL("smtp_enabled", &smtp_enabled),
 149                 CFG_SIMPLE_STR("smtp_host", &smtp_host),
 150                 CFG_SIMPLE_INT("smtp_port", &smtp_port),
 151                 CFG_SIMPLE_STR("smtp_to", &smtp_to),
 152                 CFG_SIMPLE_STR("smtp_from", &smtp_from),
 153                 CFG_SIMPLE_STR("smtp_subject", &smtp_subject),
 154                 CFG_END()
 155         };
 156
 157         cfg = NULL;
 158
 159         if (!config_file_exists()) {
 160                 daemon_log(LOG_INFO, "(%s:%u) config file '%s' does not exist", __FILE__, __LINE__, DEFAULT_CONFIGFILE);
 161                 config_with_defaults();
 162                 return;
 163         }
 164
 165         cfg = cfg_init(opts, 0);
 166         if (!cfg) {
 167                 daemon_log(LOG_ERR, "(%s:%u) cfg_init failed!", __FILE__, __LINE__);
 168                 config_with_defaults();
 169                 return;
 170         }
 171
 172         rc = cfg_parse(cfg, DEFAULT_CONFIGFILE);
 173         if (rc == CFG_PARSE_ERROR) {
 174                 daemon_log(LOG_ERR, "(%s:%u) parser error '%s'", __FILE__, __LINE__, DEFAULT_CONFIGFILE);
 175         }
 176
 177         if (cfg) {
 178                 cfg_free(cfg);
 179                 cfg = NULL;
 180         }
 181
 182         config_with_defaults();
 183 }