540 lines
12 KiB
C
540 lines
12 KiB
C
/*****************************************************************************
|
|
*
|
|
* $Id$
|
|
* 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"
|
|
|
|
|
|
|
|
|
|
/*
|
|
* Open files database Area number. Do some checks and abort
|
|
* if they fail.
|
|
*/
|
|
struct _fdbarea *mbsedb_OpenFDB(long Area, int Timeout)
|
|
{
|
|
char *temp;
|
|
struct _fdbarea *fdb_area = NULL;
|
|
int Tries = 0;
|
|
FILE *fp;
|
|
|
|
temp = calloc(PATH_MAX, sizeof(char));
|
|
fdb_area = malloc(sizeof(struct _fdbarea)); /* Will be freed by CloseFDB */
|
|
|
|
sprintf(temp, "%s/var/fdb/file%ld.data", getenv("MBSE_ROOT"), Area);
|
|
|
|
/*
|
|
* Open the file database, if it's locked, just wait.
|
|
*/
|
|
while (((fp = fopen(temp, "r+")) == NULL) && ((errno == EACCES) || (errno == EAGAIN))) {
|
|
if (++Tries >= (Timeout * 4)) {
|
|
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);
|
|
}
|
|
if (fp == NULL) {
|
|
if (errno == ENOENT) {
|
|
Syslog('+', "Create empty FDB for area %ld", Area);
|
|
fdbhdr.hdrsize = sizeof(fdbhdr);
|
|
fdbhdr.recsize = sizeof(fdb);
|
|
if ((fp = fopen(temp, "w+"))) {
|
|
fwrite(&fdbhdr, sizeof(fdbhdr), 1, fp);
|
|
}
|
|
}
|
|
} else {
|
|
fread(&fdbhdr, sizeof(fdbhdr), 1, fp);
|
|
}
|
|
|
|
/*
|
|
* If still not open, it's fatal.
|
|
*/
|
|
if (fp == NULL) {
|
|
WriteError("$Can't open %s", temp);
|
|
free(temp);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Fix attributes if needed
|
|
*/
|
|
chmod(temp, 0660);
|
|
free(temp);
|
|
|
|
if ((fdbhdr.hdrsize != sizeof(fdbhdr)) || (fdbhdr.recsize != sizeof(fdb))) {
|
|
WriteError("Files database header in area %d is corrupt (%d:%d)", Area, fdbhdr.hdrsize, fdbhdr.recsize);
|
|
fclose(fdb_area->fp);
|
|
return NULL;
|
|
}
|
|
|
|
fseek(fp, 0, SEEK_END);
|
|
if ((ftell(fp) - fdbhdr.hdrsize) % fdbhdr.recsize) {
|
|
WriteError("Files database area %ld is corrupt, unalligned records", Area);
|
|
fclose(fp);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Point to the first record
|
|
*/
|
|
fseek(fp, fdbhdr.hdrsize, SEEK_SET);
|
|
fdb_area->fp = fp;
|
|
fdb_area->locked = 0;
|
|
fdb_area->area = Area;
|
|
return fdb_area;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Close current open file area
|
|
*/
|
|
int mbsedb_CloseFDB(struct _fdbarea *fdb_area)
|
|
{
|
|
fclose(fdb_area->fp);
|
|
free(fdb_area);
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Lock Files DataBase
|
|
*/
|
|
int mbsedb_LockFDB(struct _fdbarea *fdb_area, int Timeout)
|
|
{
|
|
int rc, Tries = 0;
|
|
struct flock fl;
|
|
|
|
fl.l_type = F_WRLCK;
|
|
fl.l_whence = SEEK_SET;
|
|
fl.l_start = 0L;
|
|
fl.l_len = 1L;
|
|
fl.l_pid = getpid();
|
|
|
|
while ((rc = fcntl(fileno(fdb_area->fp), F_SETLK, &fl)) && ((errno == EACCES) || (errno == EAGAIN))) {
|
|
if (++Tries >= (Timeout * 4)) {
|
|
fcntl(fileno(fdb_area->fp), F_GETLK, &fl);
|
|
WriteError("FDB %ld is locked by pid %d", fdb_area->area, fl.l_pid);
|
|
return FALSE;
|
|
}
|
|
msleep(250);
|
|
Syslog('f', "FDB lock attempt %d", Tries);
|
|
}
|
|
|
|
if (rc) {
|
|
WriteError("$FDB %ld lock error", fdb_area->area);
|
|
return FALSE;
|
|
}
|
|
|
|
fdb_area->locked = 1;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Unlock Files DataBase
|
|
*/
|
|
int mbsedb_UnlockFDB(struct _fdbarea *fdb_area)
|
|
{
|
|
struct flock fl;
|
|
|
|
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);
|
|
}
|
|
|
|
fdb_area->locked = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
void mbsedb_Temp2Data(unsigned long);
|
|
void mbsedb_Temp2Data(unsigned long fdb_area)
|
|
{
|
|
char *temp1, *temp2;
|
|
|
|
temp1 = calloc(PATH_MAX, sizeof(char));
|
|
temp2 = calloc(PATH_MAX, sizeof(char));
|
|
|
|
/*
|
|
* 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/var/fdb/file%ld.data", getenv("MBSE_ROOT"), fdb_area);
|
|
sprintf(temp1, "%s/var/fdb/file%ld.xxxx", getenv("MBSE_ROOT"), fdb_area);
|
|
rename(temp2, temp1);
|
|
sprintf(temp1, "%s/var/fdb/file%ld.temp", getenv("MBSE_ROOT"), fdb_area);
|
|
rename(temp1, temp2);
|
|
sprintf(temp1, "%s/var/fdb/file%ld.xxxx", getenv("MBSE_ROOT"), fdb_area);
|
|
unlink(temp1);
|
|
|
|
free(temp1);
|
|
free(temp2);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
int mbsedb_InsertFDB(struct _fdbarea *fdb_area, struct FILE_record frec, int AddAlpha)
|
|
{
|
|
char *temp;
|
|
int i, Insert, Done = FALSE, Found = FALSE;
|
|
FILE *fp;
|
|
|
|
Syslog('f', "mbsedb_InsertFDB: \"%s\", magic \"%s\"", frec.LName, frec.Magic);
|
|
|
|
if (mbsedb_LockFDB(fdb_area, 30) == FALSE)
|
|
return FALSE;
|
|
|
|
fseek(fdb_area->fp, 0, SEEK_END);
|
|
if (ftell(fdb_area->fp) == fdbhdr.hdrsize) {
|
|
/*
|
|
* No records yet, simply append this first record.
|
|
*/
|
|
fwrite(&frec, fdbhdr.recsize, 1, fdb_area->fp);
|
|
mbsedb_UnlockFDB(fdb_area);
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* There are files, search the insert point.
|
|
*/
|
|
temp = calloc(PATH_MAX, sizeof(char));
|
|
sprintf(temp, "%s/var/fdb/file%ld.temp", getenv("MBSE_ROOT"), fdb_area->area);
|
|
fseek(fdb_area->fp, fdbhdr.hdrsize, SEEK_SET);
|
|
Insert = 0;
|
|
do {
|
|
if (fread(&fdb, fdbhdr.recsize, 1, fdb_area->fp) != 1)
|
|
Done = TRUE;
|
|
if (!Done) {
|
|
if (strcmp(frec.LName, fdb.LName) == 0) {
|
|
Found = TRUE;
|
|
Insert++;
|
|
} else if (strcmp(frec.LName, fdb.LName) < 0)
|
|
Found = TRUE;
|
|
else
|
|
Insert++;
|
|
}
|
|
} while ((!Found) && (!Done));
|
|
|
|
Syslog('f', "mbsedb_InsertFDB: insertpoint=%d, found=%s, done=%s", Insert, Found?"true":"false", Done?"true":"false");
|
|
|
|
// if (Found) {
|
|
if ((fp = fopen(temp, "a+")) == NULL) {
|
|
WriteError("$Can't create %s", temp);
|
|
mbsedb_UnlockFDB(fdb_area);
|
|
free(temp);
|
|
return FALSE;
|
|
}
|
|
fwrite(&fdbhdr, sizeof(fdbhdr), 1, fp);
|
|
|
|
fseek(fdb_area->fp, fdbhdr.hdrsize, SEEK_SET);
|
|
/*
|
|
* Copy entries untill the insert point.
|
|
*/
|
|
for (i = 0; i < Insert; i++) {
|
|
fread(&fdb, fdbhdr.recsize, 1, fdb_area->fp);
|
|
/*
|
|
* If we see a magic that is the new magic, remove
|
|
* the old one.
|
|
*/
|
|
if (strlen(frec.Magic) && (strcmp(fdb.Magic, frec.Magic) == 0)) {
|
|
Syslog('f', "Clear magic %s file %s", fdb.Magic, fdb.LName);
|
|
memset(&fdb.Magic, 0, sizeof(fdb.Magic));
|
|
}
|
|
|
|
/*
|
|
* Check if we are importing a file with the same
|
|
* name, if so, don't copy the original database
|
|
* record. The file is also overwritten.
|
|
*/
|
|
if (strcmp(fdb.LName, frec.LName) != 0)
|
|
fwrite(&fdb, fdbhdr.recsize, 1, fp);
|
|
}
|
|
|
|
if (AddAlpha) {
|
|
/*
|
|
* Insert new entry
|
|
*/
|
|
fwrite(&frec, fdbhdr.recsize, 1, fp);
|
|
}
|
|
|
|
/*
|
|
* Append the rest of the entries
|
|
*/
|
|
while (fread(&fdb, fdbhdr.recsize, 1, fdb_area->fp) == 1) {
|
|
/*
|
|
* If we see a magic that is the new magic, remove
|
|
* the old one.
|
|
*/
|
|
if (strlen(frec.Magic) && (strcmp(fdb.Magic, frec.Magic) == 0)) {
|
|
Syslog('f', "Clear magic %s file %s", fdb.Magic, fdb.LName);
|
|
memset(&fdb.Magic, 0, sizeof(fdb.Magic));
|
|
}
|
|
|
|
/*
|
|
* Check if we are importing a file with the same
|
|
* name, if so, don't copy the original database
|
|
* record. The file is also overwritten.
|
|
*/
|
|
if (strcmp(fdb.LName, frec.LName) != 0)
|
|
fwrite(&fdb, fdbhdr.recsize, 1, fp);
|
|
}
|
|
|
|
if (! AddAlpha) {
|
|
/*
|
|
* Append
|
|
*/
|
|
fwrite(&frec, fdbhdr.recsize, 1, fp);
|
|
}
|
|
|
|
fclose(fdb_area->fp);
|
|
mbsedb_Temp2Data(fdb_area->area);
|
|
fdb_area->fp = fp;
|
|
fdb_area->locked = 0;
|
|
// } else {
|
|
/*
|
|
* Append new entry
|
|
*/
|
|
// fseek(fdb_area->fp, 0, SEEK_END);
|
|
// fwrite(&frec, fdbhdr.recsize, 1, fdb_area->fp);
|
|
// }
|
|
|
|
free(temp);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Return -1 if error, else number of purged records
|
|
*/
|
|
int mbsedb_PackFDB(struct _fdbarea *fdb_area)
|
|
{
|
|
char *temp;
|
|
FILE *fp;
|
|
int count = 0;
|
|
|
|
fseek(fdb_area->fp, 0, SEEK_END);
|
|
if (ftell(fdb_area->fp) == fdbhdr.hdrsize) {
|
|
return 0;
|
|
}
|
|
|
|
if (mbsedb_LockFDB(fdb_area, 30) == FALSE)
|
|
return -1;
|
|
|
|
/*
|
|
* There are files, copy the remaining entries
|
|
*/
|
|
temp = calloc(PATH_MAX, sizeof(char));
|
|
sprintf(temp, "%s/var/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);
|
|
free(temp);
|
|
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) && (!fdb.Double) && (strcmp(fdb.Name, "") != 0))
|
|
fwrite(&fdb, fdbhdr.recsize, 1, fp);
|
|
else
|
|
count++;
|
|
}
|
|
|
|
fclose(fdb_area->fp);
|
|
mbsedb_Temp2Data(fdb_area->area);
|
|
fdb_area->fp = fp;
|
|
fdb_area->locked = 0;
|
|
|
|
free(temp);
|
|
|
|
return count;
|
|
}
|
|
|
|
|
|
typedef struct _fdbs {
|
|
struct _fdbs *next;
|
|
struct FILE_record filrec;
|
|
} fdbs;
|
|
|
|
|
|
|
|
void fill_fdbs(struct FILE_record, fdbs **);
|
|
void fill_fdbs(struct FILE_record filrec, fdbs **fap)
|
|
{
|
|
fdbs *tmp;
|
|
|
|
tmp = (fdbs *)malloc(sizeof(fdbs));
|
|
tmp->next = *fap;
|
|
tmp->filrec = filrec;
|
|
*fap = tmp;
|
|
}
|
|
|
|
|
|
|
|
void tidy_fdbs(fdbs **);
|
|
void tidy_fdbs(fdbs **fap)
|
|
{
|
|
fdbs *tmp, *old;
|
|
|
|
for (tmp = *fap; tmp; tmp = old) {
|
|
old = tmp->next;
|
|
free(tmp);
|
|
}
|
|
*fap = NULL;
|
|
}
|
|
|
|
|
|
int comp_fdbs(fdbs **, fdbs **);
|
|
|
|
|
|
void sort_fdbs(fdbs **);
|
|
void sort_fdbs(fdbs **fap)
|
|
{
|
|
fdbs *ta, **vector;
|
|
size_t n = 0, i;
|
|
|
|
if (*fap == NULL)
|
|
return;
|
|
|
|
for (ta = *fap; ta; ta = ta->next)
|
|
n++;
|
|
|
|
vector = (fdbs **)malloc(n * sizeof(fdbs *));
|
|
i = 0;
|
|
for (ta = *fap; ta; ta = ta->next)
|
|
vector[i++] = ta;
|
|
|
|
qsort(vector, n, sizeof(fdbs *), (int(*)(const void*, const void *))comp_fdbs);
|
|
(*fap) = vector[0];
|
|
i = 1;
|
|
|
|
for (ta = *fap; ta; ta = ta->next) {
|
|
if (i < n)
|
|
ta->next = vector[i++];
|
|
else
|
|
ta->next = NULL;
|
|
}
|
|
|
|
free(vector);
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
int comp_fdbs(fdbs **fap1, fdbs **fap2)
|
|
{
|
|
return strcasecmp((*fap1)->filrec.LName, (*fap2)->filrec.LName);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Sort a files database using the long filenames.
|
|
*/
|
|
int mbsedb_SortFDB(struct _fdbarea *fdb_area)
|
|
{
|
|
fdbs *fdx = NULL, *tmp;
|
|
char *temp;
|
|
FILE *fp;
|
|
int count = 0;
|
|
|
|
fseek(fdb_area->fp, 0, SEEK_END);
|
|
if (ftell(fdb_area->fp) <= (fdbhdr.hdrsize + fdbhdr.recsize)) {
|
|
return 0;
|
|
}
|
|
|
|
fseek(fdb_area->fp, fdbhdr.hdrsize, SEEK_SET);
|
|
|
|
while (fread(&fdb, fdbhdr.recsize, 1, fdb_area->fp) == 1) {
|
|
fill_fdbs(fdb, &fdx);
|
|
}
|
|
|
|
sort_fdbs(&fdx);
|
|
|
|
/*
|
|
* Now the most timeconsuming part is done, lock the database and
|
|
* write the new sorted version.
|
|
*/
|
|
if (mbsedb_LockFDB(fdb_area, 30) == FALSE) {
|
|
tidy_fdbs(&fdx);
|
|
return -1;
|
|
}
|
|
|
|
temp = calloc(PATH_MAX, sizeof(char));
|
|
sprintf(temp, "%s/var/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);
|
|
tidy_fdbs(&fdx);
|
|
free(temp);
|
|
return -1;
|
|
}
|
|
fwrite(&fdbhdr, fdbhdr.hdrsize, 1, fp);
|
|
|
|
/*
|
|
* Write sorted files to temp database
|
|
*/
|
|
for (tmp = fdx; tmp; tmp = tmp->next) {
|
|
fwrite(&tmp->filrec, fdbhdr.recsize, 1, fp);
|
|
count++;
|
|
}
|
|
tidy_fdbs(&fdx);
|
|
|
|
fclose(fdb_area->fp);
|
|
mbsedb_Temp2Data(fdb_area->area);
|
|
fdb_area->fp = fp;
|
|
fdb_area->locked = 0;
|
|
|
|
free(temp);
|
|
|
|
return count;
|
|
}
|
|
|
|
|