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Updated database lib

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This commit is contained in:
Michiel Broek 2004-05-05 20:26:35 +00:00
parent c5d419c88d
commit 84c94125c9
2 changed files with 69 additions and 4 deletions
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72
lib/dbfdb.c
View File

@ -350,10 +350,74 @@ int mbsedb_InsertFDB(struct _fdbarea *fdb_area, struct FILE_record frec, int Add
// mbsedb_SearchFileFDB
// mbsedb_UpdateFileFDB
// mbsedb_InsertFileFDB
// mbsedb_DeleteFileFDB
/*
* Return -1 if error, else number of purged records
*/
int mbsedb_PackFDB(struct _fdbarea *fdb_area)
{
char *temp, *temp2;
FILE *fp;
int rc, count = 0;
Syslog('f', "PackFDB %ld", fdb_area->area);
fseek(fdb_area->fp, 0, SEEK_END);
if (ftell(fdb_area->fp) == fdbhdr.hdrsize) {
Syslog('f', "no records, nothing to do");
return 0;
}
if (mbsedb_LockFDB(fdb_area, 30) == FALSE)
return -1;
/*
* There are files, copy the remaining entries
*/
temp = calloc(PATH_MAX, sizeof(char));
temp2 = calloc(PATH_MAX, sizeof(char));
sprintf(temp, "%s/fdb/file%ld.temp", getenv("MBSE_ROOT"), fdb_area->area);
if ((fp = fopen(temp, "a+")) == NULL) {
WriteError("$Can't create %s", temp);
mbsedb_UnlockFDB(fdb_area);
return -1;
}
fwrite(&fdbhdr, fdbhdr.hdrsize, 1, fp);
fseek(fdb_area->fp, fdbhdr.hdrsize, SEEK_SET);
while (fread(&fdb, fdbhdr.recsize, 1, fdb_area->fp) == 1) {
if (!fdb.Deleted)
fwrite(&fdb, fdbhdr.recsize, 1, fp);
else
count++;
}
/*
* Now the trick, some might be waiting for a lock on the original file,
* we will give that a new name on disk. Then we move the temp in place.
* Finaly remove the old (still locked) original file.
*/
sprintf(temp2, "%s/fdb/file%ld.data", getenv("MBSE_ROOT"), fdb_area->area);
sprintf(temp, "%s/fdb/file%ld.xxxx", getenv("MBSE_ROOT"), fdb_area->area);
rc = rename(temp2, temp);
Syslog('f', "rename %s %s rc=%d", temp2, temp, rc);
sprintf(temp, "%s/fdb/file%ld.temp", getenv("MBSE_ROOT"), fdb_area->area);
rc = rename(temp, temp2);
Syslog('f', "rename %s %s rc=%d", temp, temp2, rc);
sprintf(temp, "%s/fdb/file%ld.xxxx", getenv("MBSE_ROOT"), fdb_area->area);
rc = unlink(temp);
Syslog('f', "unlink %s rc=%d", temp, rc);
fdb_area->fp = fp;
fdb_area->locked = 0;
free(temp);
free(temp2);
Syslog('f', "success, purged %d", count);
return count;
}
// mbsedb_SortFDB

1
lib/mbsedb.h
View File

@ -149,6 +149,7 @@ int mbsedb_CloseFDB(struct _fdbarea *);
int mbsedb_LockFDB(struct _fdbarea *, int);
int mbsedb_UnlockFDB(struct _fdbarea *);
int mbsedb_InsertFDB(struct _fdbarea *, struct FILE_record, int);
int mbsedb_PackFDB(struct _fdbarea *);
#endif