#ident "$URL: svn://elmer/devel/SVN/SDDAS/trunk/libCfg/CfgInit.c $ %D% SwRI"

#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#define _CfgInit_

#include "ant.h"          /* needed for InitSDDASCfg and FreeSDDASCfg */
#include "libCfg.h"
#include "libCfg_local.h"

/*
 * Initialize the Projects tree by reading the file defined by the variable
 * PROJECTScfg (in libCfg.h).  Also read information to be stored at various
 * nodes of the tree defined by the routine DB_Config()
 */

char *GetGoodPath (char *fileName)
{
    static char path [256];
    char *config;
    short GoodPath;

    GoodPath = 0;
    if ((config = getenv("SDDAS_CONFIG")) != NULL)
    {
       snprintf(path, sizeof (path), "%s/%s", config, fileName);
       if (access(path, R_OK) != 0)
          fprintf(stderr, "Defaulting to $SDDAS_HOME for %s.\n", fileName);
       else
          GoodPath = 1;
    }
    if (!GoodPath && (config = getenv("SDDAS_HOME")) != NULL)
    {
       snprintf(path, sizeof (path), "%s/config/%s", config, fileName);
       if (access(path, R_OK) == 0)
          GoodPath = 1;
    }
    if (!GoodPath) return NULL;
    return path;
}

void CfgInit()
{
   char *path;

   if (Projects == 0x0)
   {

/* This is a non fatal error! */
/* Must be before reading the DB.cfg file because we want to use the values in this
   file for expanding environment variables used in that file */

      path = GetGoodPath ("sddas.cfg");
      if (path != NULL) {
          InitSDDASCfg (path);
      }

      path = GetGoodPath (PROJECTScfg);
      if (path == NULL) {
         fprintf (stderr, "Cannot read PROJECTS configuration [NULL]\nIs SDDAS_HOME set?\n");
         exit (2);
      }

      Projects = (LinkList)P_Config(path);

      path = GetGoodPath (ITEMcfg);
      if (path == NULL) {
         fprintf (stderr, "Cannot read DB configuration [%s]\n", path);
         exit (2);
      }
      DB_Config(path, Projects);
   }
}