Experimental Physics and
Industrial Control System

 

// Set this to use 'tmpfile' to create a temprary file, or don't set to use tempname and create an actual file in /tmp

//#define USE_TMPFILE

void loadMyDatabaseRecords(void)

{

                char *pptr = NULL;

                char *subsPtr = NULL;

                FILE *tempFile = NULL;

                const char substring[] = "P=";

 

#ifndef USE_TMPFILE

                char nameTemplate[] = "BNET";

                char *tempName;

#endif

               

                /* Generate a temporary file, and write the database definition of the diagnostics record into it. */

#ifdef USE_TMPFILE

                tempFile = tmpfile();

#else

                tempName = tempnam(NULL, nameTemplate);

                printf("Opening %s\n",tempName);

                tempFile=fopen(tempName, "w+");

#endif

                if(tempFile) {

                                size_t i;

 

                                i=fputs(recordsDef, tempFile);

#ifdef USE_TMPFILE

                                // rewind the file to the start

                                rewind(tempFile);

#else

                                // If I'm using a file to do this, lets just close the file at the moment.

                                fclose(tempFile);

#endif

                                // Not quite ready yet, I need to fill out my "substitutions" buffer

                                pptr=getenv("IOCNAME");

                                i=strlen(substring)+strlen(pptr);

                                subsPtr = (char *) calloc(sizeof(char), i+1);

                                strncpy(subsPtr, substring, strlen(substring) );

                                strncat(subsPtr, pptr, strlen(pptr)+1);

                               

#ifdef USE_TMPFILE

                                printf("Loading new database\n");

                                // use dbReadDatabaseFP to load the file

                                dbReadDatabaseFP(&pdbbase, tempFile, NULL, subsPtr);

#else

                                printf("Loading my temp file %s\n",tempName);

                                // use dbReadDatabase to load the file

                                dbReadDatabase(&pdbbase, tempName, NULL, subsPtr);

                                free(tempName);

#endif

                                printf("Done\n");

                                free(subsPtr);

                                printf("Closing file\n");

#ifdef USE_TMPFILE

                                // Closing the file will delete it as well.

                                fclose(tempFile);

#else

#endif

                }

}