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 "clam.hxx"
  37 #include "inotify.hxx"
  38 #include "smtp.hxx"
  39
  40 /**
  41  * Checks if the configuration file exists as a regular file.
  42  * @return Returns 1 if the file exists and is regular, else 0.
  43  */
  44 static int config_file_exists()
  45 {
  46         struct stat s;
  47
  48         /* No config file defined - NULL Pointer Check */
  49         if (!DEFAULT_CONFIGFILE) {
  50                 return 0;
  51         }
  52
  53         /* File exists? */
  54         if (stat(DEFAULT_CONFIGFILE, &s) < 0) {
  55                 return 0;
  56         }
  57
  58         /* File is a regular file? */
  59         if (!S_ISREG(s.st_mode)) {
  60                 return 0;
  61         }
  62
  63         return 1;
  64 }
  65
  66 /**
  67  * Release any resources that hold configuration information.
  68  * This function effectively resets all configurable values.
  69  * It should be called at the end of the program.
  70  */
  71 void config_free()
  72 {
  73         if (watch_dir != NULL) {
  74                 free(watch_dir);
  75                 watch_dir = NULL;
  76         }
  77
  78         virus_removal_enabled = cfg_true;
  79
  80         smtp_enabled = cfg_true;
  81
  82         if (smtp_host != NULL) {
  83                 free(smtp_host);
  84                 smtp_host = NULL;
  85         }
  86
  87         smtp_port = 0;
  88
  89         if (smtp_to != NULL) {
  90                 free(smtp_to);
  91                 smtp_to = NULL;
  92         }
  93
  94         if (smtp_from != NULL) {
  95                 free(smtp_from);
  96                 smtp_from = NULL;
  97         }
  98
  99         if (smtp_subject != NULL) {
 100                 free(smtp_subject);
 101                 smtp_subject = NULL;
 102         }
 103 }
 104
 105 /**
 106  * Examines each value of the current configuration.
 107  * If a value was not set, it is set to the default.
 108  */
 109 static void config_with_defaults()
 110 {
 111         if (watch_dir == NULL) {
 112                 watch_dir = strdup(WATCH_DIR);
 113         }
 114
 115         if (smtp_host == NULL) {
 116                 smtp_host = strdup(SMTP_HOST);
 117         }
 118
 119         if (smtp_port == 0) {
 120                 smtp_port = SMTP_PORT;
 121         }
 122
 123         if (smtp_to == NULL) {
 124                 smtp_to = strdup(SMTP_TO);
 125         }
 126
 127         if (smtp_from == NULL) {
 128                 smtp_from = strdup(SMTP_FROM);
 129         }
 130
 131         if (smtp_subject == NULL) {
 132                 smtp_subject = strdup(SMTP_SUBJECT);
 133         }
 134 }
 135
 136 /**
 137  * Parses an inoclam.conf configuration file.
 138  */
 139 void config_parse()
 140 {
 141         int rc;
 142
 143         config_free();
 144
 145         cfg_t *cfg;
 146         cfg_opt_t opts[] = {
 147                 CFG_SIMPLE_STR("watch_dir", &watch_dir),
 148                 CFG_SIMPLE_BOOL("virus_removal_enabled", &virus_removal_enabled),
 149                 CFG_SIMPLE_BOOL("smtp_enabled", &smtp_enabled),
 150                 CFG_SIMPLE_STR("smtp_host", &smtp_host),
 151                 CFG_SIMPLE_INT("smtp_port", &smtp_port),
 152                 CFG_SIMPLE_STR("smtp_to", &smtp_to),
 153                 CFG_SIMPLE_STR("smtp_from", &smtp_from),
 154                 CFG_SIMPLE_STR("smtp_subject", &smtp_subject),
 155                 CFG_END()
 156         };
 157
 158         cfg = NULL;
 159
 160         if (!config_file_exists()) {
 161                 daemon_log(LOG_INFO, "Configuration file '%s' not found.", DEFAULT_CONFIGFILE);
 162                 config_with_defaults();
 163                 return;
 164         }
 165
 166         cfg = cfg_init(opts, 0);
 167         if (!cfg) {
 168                 daemon_log(LOG_ERR, "cfg_init failed!");
 169                 config_with_defaults();
 170                 return;
 171         }
 172
 173         rc = cfg_parse(cfg, DEFAULT_CONFIGFILE);
 174         if (rc == CFG_PARSE_ERROR) {
 175                 daemon_log(LOG_ERR, "parser error '%s'", DEFAULT_CONFIGFILE);
 176         }
 177
 178         if (cfg) {
 179                 cfg_free(cfg);
 180                 cfg = NULL;
 181         }
 182
 183         config_with_defaults();
 184 }