* Variable names, comments, documentation, etc... removed the acronym 'BBS'

[citadel.git] / citadel / config.c

diff --git a/citadel/config.c b/citadel/config.c
index fde50feb1add4f511708dbf73be5d5a6402ba97c..8562f3472f213f4e4ddbe2113d227464c38a60e0 100644 (file)
--- a/citadel/config.c
+++ b/citadel/config.c
@@ -1,50 +1,125 @@
 /*
+ * $Id$
+ *
  * This function reads the citadel.config file.  It should be called at
  * the beginning of EVERY Citadel program.
+ *
  */
 
+#ifdef DLL_EXPORT
+#define IN_LIBCIT
+#endif
+
 #include "sysdep.h"
 #include <stdlib.h>
+#include <sys/stat.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <errno.h>
 #include <string.h>
+#include <limits.h>
 #include "citadel.h"
+#include "server.h"
+#include "serv_extensions.h"
+#include "config.h"
 
-extern void get_config(void);
 struct config config;
-char bbs_home_directory[256];
+char ctdl_home_directory[PATH_MAX] = CTDLDIR;
 int home_specified = 0;
 
+/*
+ * get_config() is called during the initialization of any program which
+ * directly accesses Citadel data files.  It verifies the system's integrity
+ * and reads citadel.config into memory.
+ */
 void get_config(void) {
        FILE *cfp;
+       struct stat st;
 
-       if (chdir( home_specified ? bbs_home_directory : BBSDIR ) != 0) {
-               fprintf(stderr, "Cannot start.\nThere is no Citadel installation in %s\n%s\n",
-                       (home_specified ? bbs_home_directory : BBSDIR),
+       if (chdir(home_specified ? ctdl_home_directory : CTDLDIR) != 0) {
+               fprintf(stderr,
+                       "This program could not be started.\n"
+                       "Unable to change directory to %s\n"
+                       "Error: %s\n",
+                       (home_specified ? ctdl_home_directory : CTDLDIR),
                        strerror(errno));
-               exit(errno);
-               }
-       cfp=fopen("citadel.config","r");
-       if (cfp==NULL) {
-               fprintf(stderr, "Cannot start.\n");
-               fprintf(stderr, "There is no citadel.config in %s\n%s\n",
-                       (home_specified ? bbs_home_directory : BBSDIR),
+               exit(1);
+       }
+       cfp = fopen("citadel.config", "rb");
+       if (cfp == NULL) {
+               fprintf(stderr, "This program could not be started.\n"
+                       "Unable to open %s/citadel.config\n"
+                       "Error: %s\n",
+                       (home_specified ? ctdl_home_directory : CTDLDIR),
                        strerror(errno));
-               exit(errno);
-               }
-       fread((char *)&config,sizeof(struct config),1,cfp);
+               exit(1);
+       }
+       fread((char *) &config, sizeof(struct config), 1, cfp);
+       if (fstat(fileno(cfp), &st)) {
+               perror("citadel.config");
+               exit(1);
+       }
+#ifndef __CYGWIN__
+       if (st.st_uid != CTDLUID || st.st_mode != (S_IFREG | S_IRUSR | S_IWUSR)) {
+               fprintf(stderr, "check the permissions on citadel.config\n");
+               exit(1);
+       }
+#endif
        fclose(cfp);
-       if ( (config.c_setup_level / 10) != (REV_LEVEL/10) ) {
+
+       if (config.c_setup_level < REV_MIN) {
                fprintf(stderr, "config: Your data files are out of date.  ");
                fprintf(stderr, "Run setup to update them.\n");
                fprintf(stderr,
                        "        This program requires level %d.%02d\n",
-                               (REV_LEVEL / 100), (REV_LEVEL % 100) );
+                       (REV_LEVEL / 100), (REV_LEVEL % 100));
                fprintf(stderr,
                        "        Data files are currently at %d.%02d\n",
-                               (config.c_setup_level / 100),
-                               (config.c_setup_level % 100) );
+                       (config.c_setup_level / 100),
+                       (config.c_setup_level % 100));
                exit(1);
-               }
        }
+
+        /* Default maximum message length is 10 megabytes.  This is site
+        * configurable.  Also check to make sure the limit has not been
+        * set below 8192 bytes.
+         */
+        if (config.c_maxmsglen <= 0)
+                config.c_maxmsglen = 10485760;
+        if (config.c_maxmsglen < 8192)
+                config.c_maxmsglen = 8192;
+
+        /* Default lower and upper limits on number of worker threads */
+
+       if (config.c_min_workers < 3)           /* no less than 3 */
+               config.c_min_workers = 5;
+
+       if (config.c_max_workers == 0)                  /* default maximum */
+               config.c_max_workers = 256;
+
+       if (config.c_max_workers < config.c_min_workers)   /* max >= min */
+               config.c_max_workers = config.c_min_workers;
+
+       /* Networking more than once every five minutes just isn't sane */
+       if (config.c_net_freq == 0L)
+               config.c_net_freq = 3600L;      /* once per hour default */
+       if (config.c_net_freq < 300L) 
+               config.c_net_freq = 300L;
+}
+
+
+/*
+ * Occasionally, we will need to write the config file, because some operations
+ * change site-wide parameters.
+ */
+void put_config(void)
+{
+       FILE *cfp;
+
+       if ((cfp = fopen("citadel.config", "rb+")) == NULL)
+               perror("citadel.config");
+       else {
+               fwrite((char *) &config, sizeof(struct config), 1, cfp);
+               fclose(cfp);
+       }
+}