2004-05-03 12:35:58 +00:00
|
|
|
/*****************************************************************************
|
|
|
|
*
|
|
|
|
* $Id$
|
|
|
|
* Purpose ...............: Files database functions
|
|
|
|
*
|
|
|
|
*****************************************************************************
|
|
|
|
* Copyright (C) 1997-2004
|
|
|
|
*
|
|
|
|
* Michiel Broek FIDO: 2:280/2802
|
|
|
|
* Beekmansbos 10
|
|
|
|
* 1971 BV IJmuiden
|
|
|
|
* the Netherlands
|
|
|
|
*
|
|
|
|
* This file is part of MBSE BBS.
|
|
|
|
*
|
|
|
|
* This BBS is free software; you can redistribute it and/or modify it
|
|
|
|
* under the terms of the GNU General Public License as published by the
|
|
|
|
* Free Software Foundation; either version 2, or (at your option) any
|
|
|
|
* later version.
|
|
|
|
*
|
|
|
|
* MBSE BBS is distributed in the hope that it will be useful, but
|
|
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
* General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with MBSE BBS; see the file COPYING. If not, write to the Free
|
|
|
|
* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
|
|
|
*****************************************************************************/
|
|
|
|
|
|
|
|
#include "../config.h"
|
|
|
|
#include "mbselib.h"
|
|
|
|
#include "users.h"
|
|
|
|
#include "mbsedb.h"
|
|
|
|
|
|
|
|
|
2004-05-03 19:35:53 +00:00
|
|
|
#ifdef USE_EXPERIMENT
|
|
|
|
|
2004-05-03 19:11:04 +00:00
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Open files database Area number, with path. Do some checks and abort
|
|
|
|
* if they fail.
|
|
|
|
*/
|
2004-05-04 12:31:23 +00:00
|
|
|
struct _fdbarea *mbsedb_OpenFDB(long Area, int Timeout)
|
2004-05-03 19:11:04 +00:00
|
|
|
{
|
2004-05-04 12:31:23 +00:00
|
|
|
char *temp;
|
|
|
|
struct _fdbarea *fdb_area = NULL;
|
|
|
|
int Tries = 0;
|
2004-05-04 14:31:25 +00:00
|
|
|
FILE *fp;
|
2004-05-04 12:31:23 +00:00
|
|
|
|
|
|
|
Syslog('f', "OpenFDB area %ld, timeout %d", Area, Timeout);
|
2004-05-03 19:11:04 +00:00
|
|
|
|
|
|
|
temp = calloc(PATH_MAX, sizeof(char));
|
2004-05-04 14:31:25 +00:00
|
|
|
fdb_area = malloc(sizeof(struct _fdbarea)); /* Will be freed by CloseFDB */
|
|
|
|
|
2004-05-03 19:35:53 +00:00
|
|
|
sprintf(temp, "%s/fdb/file%ld.data", getenv("MBSE_ROOT"), Area);
|
2004-05-03 19:11:04 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Open the file database, if it's locked, just wait.
|
|
|
|
*/
|
2004-05-04 14:31:25 +00:00
|
|
|
while (((fp = fopen(temp, "r+")) == NULL) && ((errno == EACCES) || (errno == EAGAIN))) {
|
2004-05-04 12:31:23 +00:00
|
|
|
if (++Tries >= (Timeout * 4)) {
|
2004-05-03 19:11:04 +00:00
|
|
|
WriteError("Can't open file area %ld, timeout", Area);
|
|
|
|
free(temp);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
msleep(250);
|
|
|
|
Syslog('f', "Open file area %ld, try %d", Area, Tries);
|
|
|
|
}
|
2004-05-04 14:31:25 +00:00
|
|
|
if (fp == NULL) {
|
2004-05-03 19:11:04 +00:00
|
|
|
WriteError("$Can't open %s", temp);
|
|
|
|
free(temp);
|
|
|
|
return NULL;
|
|
|
|
}
|
2004-05-04 14:31:25 +00:00
|
|
|
fread(&fdbhdr, sizeof(fdbhdr), 1, fp);
|
2004-05-03 19:11:04 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Fix attributes if needed
|
|
|
|
*/
|
|
|
|
chmod(temp, 0660);
|
|
|
|
free(temp);
|
|
|
|
|
|
|
|
if ((fdbhdr.hdrsize != sizeof(fdbhdr)) || (fdbhdr.recsize != sizeof(fdb))) {
|
|
|
|
WriteError("Files database header in area %d is corrupt (%d:%d)", Area, fdbhdr.hdrsize, fdbhdr.recsize);
|
2004-05-04 12:31:23 +00:00
|
|
|
fclose(fdb_area->fp);
|
2004-05-03 19:11:04 +00:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2004-05-04 14:31:25 +00:00
|
|
|
fseek(fp, 0, SEEK_END);
|
|
|
|
if ((ftell(fp) - fdbhdr.hdrsize) % fdbhdr.recsize) {
|
2004-05-03 19:11:04 +00:00
|
|
|
WriteError("Files database area %ld is corrupt, unalligned records", Area);
|
2004-05-04 14:31:25 +00:00
|
|
|
fclose(fp);
|
2004-05-03 19:11:04 +00:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Point to the first record
|
|
|
|
*/
|
2004-05-04 14:31:25 +00:00
|
|
|
fseek(fp, fdbhdr.hdrsize, SEEK_SET);
|
|
|
|
fdb_area->fp = fp;
|
2004-05-04 12:31:23 +00:00
|
|
|
fdb_area->locked = 0;
|
|
|
|
fdb_area->area = Area;
|
|
|
|
Syslog('f', "OpenFDB success");
|
|
|
|
return fdb_area;
|
2004-05-03 19:11:04 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Close current open file area
|
|
|
|
*/
|
2004-05-04 12:31:23 +00:00
|
|
|
int mbsedb_CloseFDB(struct _fdbarea *fdb_area)
|
2004-05-03 19:11:04 +00:00
|
|
|
{
|
2004-05-04 12:31:23 +00:00
|
|
|
Syslog('f', "CloseFDB %ld", fdb_area->area);
|
|
|
|
if (fdb_area->locked) {
|
2004-05-03 19:11:04 +00:00
|
|
|
/*
|
|
|
|
* Unlock first
|
|
|
|
*/
|
2004-05-04 12:31:23 +00:00
|
|
|
mbsedb_UnlockFDB(fdb_area);
|
|
|
|
}
|
|
|
|
fclose(fdb_area->fp);
|
2004-05-04 14:31:25 +00:00
|
|
|
|
|
|
|
free(fdb_area);
|
2004-05-04 12:31:23 +00:00
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
int mbsedb_LockFDB(struct _fdbarea *fdb_area, int Timeout)
|
|
|
|
{
|
|
|
|
int rc, Tries = 0;
|
|
|
|
struct flock fl;
|
|
|
|
|
|
|
|
Syslog('f', "LockFDB %ld", fdb_area->area);
|
|
|
|
fl.l_type = F_WRLCK;
|
|
|
|
fl.l_whence = SEEK_SET;
|
|
|
|
fl.l_start = 0L;
|
|
|
|
fl.l_len = 1L;
|
|
|
|
fl.l_pid = getpid();
|
|
|
|
|
|
|
|
while ((rc = fcntl(fileno(fdb_area->fp), F_SETLK, &fl)) && ((errno == EACCES) || (errno == EAGAIN))) {
|
|
|
|
if (++Tries >= (Timeout * 4)) {
|
|
|
|
fcntl(fileno(fdb_area->fp), F_GETLK, &fl);
|
|
|
|
WriteError("FDB %ld is locked by pid %d", fdb_area->area, fl.l_pid);
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
msleep(250);
|
|
|
|
Syslog('f', "FDB lock attempt %d", Tries);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (rc) {
|
|
|
|
WriteError("$FDB %ld lock error", fdb_area->area);
|
|
|
|
return FALSE;
|
|
|
|
}
|
|
|
|
|
|
|
|
Syslog('f', "LockFDB success");
|
|
|
|
fdb_area->locked = 1;
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
int mbsedb_UnlockFDB(struct _fdbarea *fdb_area)
|
|
|
|
{
|
|
|
|
struct flock fl;
|
|
|
|
|
|
|
|
Syslog('f', "UnlockFDB %ld", fdb_area->area);
|
|
|
|
fl.l_type = F_UNLCK;
|
|
|
|
fl.l_whence = SEEK_SET;
|
|
|
|
fl.l_start = 0L;
|
|
|
|
fl.l_len = 1L;
|
|
|
|
fl.l_pid = getpid();
|
|
|
|
|
|
|
|
if (fcntl(fileno(fdb_area->fp), F_SETLK, &fl)) {
|
|
|
|
WriteError("$Can't unlock FDB area %ld", fdb_area->area);
|
2004-05-03 19:11:04 +00:00
|
|
|
}
|
2004-05-04 12:31:23 +00:00
|
|
|
|
|
|
|
fdb_area->locked = 0;
|
2004-05-03 19:35:53 +00:00
|
|
|
return TRUE;
|
2004-05-03 19:11:04 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// mbsedb_SearchFileFDB
|
|
|
|
// mbsedb_UpdateFileFDB
|
|
|
|
// mbsedb_InsertFileFDB
|
|
|
|
// mbsedb_DeleteFileFDB
|
|
|
|
// mbsedb_SortFDB
|
|
|
|
|
2004-05-03 13:23:02 +00:00
|
|
|
|
|
|
|
#endif
|