citadel/config.c

   1 /*
   2  * $Id$
   3  *
   4  * This function reads the citadel.config file.  It should be called at
   5  * the beginning of EVERY Citadel program.
   6  *
   7  */
   8
   9 #include "sysdep.h"
  10 #include <stdlib.h>
  11 #include <sys/stat.h>
  12 #include <unistd.h>
  13 #include <stdio.h>
  14 #include <errno.h>
  15 #include <string.h>
  16 #include <limits.h>
  17 #include <libcitadel.h>
  18 #include "citadel.h"
  19 #include "server.h"
  20 #include "config.h"
  21
  22 struct config config;
  23
  24 /*
  25  * get_config() is called during the initialization of any program which
  26  * directly accesses Citadel data files.  It verifies the system's integrity
  27  * and reads citadel.config into memory.
  28  */
  29 void get_config(void) {
  30         FILE *cfp;
  31         struct stat st;
  32
  33         if (chdir(ctdl_bbsbase_dir) != 0) {
  34                 fprintf(stderr,
  35                         "This program could not be started.\n"
  36                         "Unable to change directory to %s\n"
  37                         "Error: %s\n",
  38                         ctdl_bbsbase_dir,
  39                         strerror(errno));
  40                 exit(CTDLEXIT_HOME);
  41         }
  42         cfp = fopen(file_citadel_config, "rb");
  43         if (cfp == NULL) {
  44                 fprintf(stderr, "This program could not be started.\n"
  45                                 "Unable to open %s\n"
  46                                 "Error: %s\n",
  47                                 file_citadel_config,
  48                                 strerror(errno));
  49                 exit(CTDLEXIT_CONFIG);
  50         }
  51         fread((char *) &config, sizeof(struct config), 1, cfp);
  52         if (fstat(fileno(cfp), &st)) {
  53                 perror(file_citadel_config);
  54                 exit(CTDLEXIT_CONFIG);
  55         }
  56
  57 #ifndef __CYGWIN__
  58         if (st.st_uid != CTDLUID) {
  59                 fprintf(stderr, "%s must be owned by uid="F_UID_T" but "F_UID_T" owns it!\n",
  60                         file_citadel_config, CTDLUID, st.st_uid);
  61                 exit(CTDLEXIT_CONFIG);
  62         }
  63         int desired_mode = (S_IFREG | S_IRUSR | S_IWUSR) ;
  64         if (st.st_mode != desired_mode) {
  65                 fprintf(stderr, "%s must be set to permissions mode %03o but they are %03o\n",
  66                         file_citadel_config, desired_mode, st.st_mode);
  67                 exit(CTDLEXIT_CONFIG);
  68         }
  69 #endif
  70
  71         fclose(cfp);
  72
  73         /* Ensure that we are linked to the correct version of libcitadel */
  74         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
  75                 fprintf(stderr, "    You are running libcitadel version %d.%02d\n",
  76                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
  77                 fprintf(stderr, "citserver was compiled against version %d.%02d\n",
  78                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
  79                 exit(CTDLEXIT_LIBCITADEL);
  80         }
  81
  82
  83         /* Check to see whether 'setup' must first be run to update data file formats */
  84         if (config.c_setup_level < REV_MIN) {
  85                 fprintf(stderr, "Your data files are out of date.  Run setup to update them.\n");
  86                 fprintf(stderr, "        This program requires level %d.%02d\n",
  87                         (REV_LEVEL / 100), (REV_LEVEL % 100));
  88                 fprintf(stderr, "        Data files are currently at %d.%02d\n",
  89                         (config.c_setup_level / 100),
  90                         (config.c_setup_level % 100));
  91                 exit(CTDLEXIT_OOD);
  92         }
  93
  94         /* Default maximum message length is 10 megabytes.  This is site
  95          * configurable.  Also check to make sure the limit has not been
  96          * set below 8192 bytes.
  97          */
  98         if (config.c_maxmsglen <= 0)
  99                 config.c_maxmsglen = 10485760;
 100         if (config.c_maxmsglen < 8192)
 101                 config.c_maxmsglen = 8192;
 102
 103         /* Default lower and upper limits on number of worker threads */
 104
 105         if (config.c_min_workers < 3)           /* no less than 3 */
 106                 config.c_min_workers = 5;
 107
 108         if (config.c_max_workers == 0)                  /* default maximum */
 109                 config.c_max_workers = 256;
 110
 111         if (config.c_max_workers < config.c_min_workers)   /* max >= min */
 112                 config.c_max_workers = config.c_min_workers;
 113
 114         /* Networking more than once every five minutes just isn't sane */
 115         if (config.c_net_freq == 0L)
 116                 config.c_net_freq = 3600L;      /* once per hour default */
 117         if (config.c_net_freq < 300L)
 118                 config.c_net_freq = 300L;
 119
 120         /* Same goes for POP3 */
 121         if (config.c_pop3_fetch == 0L)
 122                 config.c_pop3_fetch = 3600L;    /* once per hour default */
 123         if (config.c_pop3_fetch < 300L)
 124                 config.c_pop3_fetch = 300L;
 125         if (config.c_pop3_fastest == 0L)
 126                 config.c_pop3_fastest = 3600L;  /* once per hour default */
 127         if (config.c_pop3_fastest < 300L)
 128                 config.c_pop3_fastest = 300L;
 129
 130         /* "create new user" only works with native authentication mode */
 131         if (config.c_auth_mode != AUTHMODE_NATIVE) {
 132                 config.c_disable_newu = 1;
 133         }
 134 }
 135
 136
 137 /*
 138  * Occasionally, we will need to write the config file, because some operations
 139  * change site-wide parameters.
 140  */
 141 void put_config(void)
 142 {
 143         FILE *cfp;
 144
 145         if ((cfp = fopen(file_citadel_config, "rb+")) == NULL)
 146                 perror(file_citadel_config);
 147         else {
 148                 fwrite((char *) &config, sizeof(struct config), 1, cfp);
 149                 fclose(cfp);
 150         }
 151 }