/*****************************************************************************
*
* $Id$
* Purpose: File Database Maintenance - Check filebase
*
*****************************************************************************
* Copyright (C) 1997-2002
*
* 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 "../lib/libs.h"
#include "../lib/structs.h"
#include "../lib/users.h"
#include "../lib/records.h"
#include "../lib/common.h"
#include "../lib/clcomm.h"
#include "../lib/dbcfg.h"
#include "../lib/mberrors.h"
#include "mbfutil.h"
#include "mbfcheck.h"
extern int do_quiet; /* Suppress screen output */
extern int do_pack; /* Pack filebase */
/*
* Check file database integrity, all files in the file database must
* exist in real, the size and date/time must match, the files crc is
* checked, and if anything is wrong, the file database is updated.
* If the file is missing the entry is marked as deleted. With the
* pack option that record will be removed.
* After these checks, de database is checked for missing records, if
* there are files on disk but not in the directory these files are
* deleted. System files (beginning with a dot) are left alone and
* the files 'files.bbs', 'files.bak', '00index', 'header' 'readme'
* and 'index.html' too.
*
* Remarks: Maybe if the crc check fails, and the date and time are
* ok, the file is damaged and must be made unavailable.
*/
void Check(void)
{
FILE *pAreas, *pFile;
int i, j, iAreas, iAreasNew = 0, Fix, inArea, iTotal = 0, iErrors = 0;
char *sAreas, *fAreas, *newdir, *temp, *mname, *tname;
DIR *dp;
struct dirent *de;
int Found, Update;
char fn[PATH_MAX];
struct stat stb;
struct passwd *pw;
struct group *gr;
sAreas = calloc(PATH_MAX, sizeof(char));
fAreas = calloc(PATH_MAX, sizeof(char));
newdir = calloc(PATH_MAX, sizeof(char));
temp = calloc(PATH_MAX, sizeof(char));
mname = calloc(PATH_MAX, sizeof(char));
if (!do_quiet) {
colour(3, 0);
printf("Checking file database...\n");
}
sprintf(sAreas, "%s/etc/fareas.data", getenv("MBSE_ROOT"));
if ((pAreas = fopen (sAreas, "r")) == NULL) {
WriteError("Can't open %s", sAreas);
die(MBERR_INIT_ERROR);
}
fread(&areahdr, sizeof(areahdr), 1, pAreas);
fseek(pAreas, 0, SEEK_END);
iAreas = (ftell(pAreas) - areahdr.hdrsize) / areahdr.recsize;
for (i = 1; i <= iAreas; i++) {
fseek(pAreas, ((i-1) * areahdr.recsize) + areahdr.hdrsize, SEEK_SET);
fread(&area, areahdr.recsize, 1, pAreas);
if (area.Available) {
IsDoing("Check area %d", i);
if (!do_quiet) {
printf("\r%4d => %-44s \b\b\b\b", i, area.Name);
fflush(stdout);
}
/*
* Check if download directory exists,
* if not, create the directory.
*/
if (access(area.Path, R_OK) == -1) {
Syslog('!', "No dir: %s", area.Path);
sprintf(newdir, "%s/foobar", area.Path);
mkdirs(newdir, 0775);
}
if (stat(area.Path, &stb) == 0) {
/*
* Very extended directory check
*/
Fix = FALSE;
if ((stb.st_mode & S_IRUSR) == 0) {
Fix = TRUE;
WriteError("No owner read access in %s, mode is %04o", area.Path, stb.st_mode & 0x1ff);
}
if ((stb.st_mode & S_IWUSR) == 0) {
Fix = TRUE;
WriteError("No owner write access in %s, mode is %04o", area.Path, stb.st_mode & 0x1ff);
}
if ((stb.st_mode & S_IRGRP) == 0) {
Fix = TRUE;
WriteError("No group read access in %s, mode is %04o", area.Path, stb.st_mode & 0x1ff);
}
if ((stb.st_mode & S_IWGRP) == 0) {
Fix = TRUE;
WriteError("No group write access in %s, mode is %04o", area.Path, stb.st_mode & 0x1ff);
}
if ((stb.st_mode & S_IROTH) == 0) {
Fix = TRUE;
WriteError("No others read access in %s, mode is %04o", area.Path, stb.st_mode & 0x1ff);
}
if (Fix) {
iErrors++;
if (chmod(area.Path, 0775))
WriteError("Could not set mode to 0775");
else
Syslog('+', "Corrected directory mode to 0775");
}
Fix = FALSE;
pw = getpwuid(stb.st_uid);
if (strcmp(pw->pw_name, (char *)"mbse")) {
WriteError("Directory %s not owned by user mbse", area.Path);
Fix = TRUE;
}
gr = getgrgid(stb.st_gid);
if (strcmp(gr->gr_name, (char *)"bbs")) {
WriteError("Directory %s not owned by group bbs", area.Path);
Fix = TRUE;
}
if (Fix) {
iErrors++;
pw = getpwnam((char *)"mbse");
gr = getgrnam((char *)"bbs");
if (chown(area.Path, pw->pw_gid, gr->gr_gid))
WriteError("Could not set owner to mbse.bbs");
else
Syslog('+', "Corrected directory owner to mbse.bbs");
}
} else {
WriteError("Can't stat %s", area.Path);
}
sprintf(fAreas, "%s/fdb/fdb%d.data", getenv("MBSE_ROOT"), i);
/*
* Open the file database, if it doesn't exist,
* create an empty one.
*/
if ((pFile = fopen(fAreas, "r+")) == NULL) {
Syslog('!', "Creating new %s", fAreas);
if ((pFile = fopen(fAreas, "a+")) == NULL) {
WriteError("$Can't create %s", fAreas);
die(MBERR_GENERAL);
}
}
/*
* Now start checking the files in the filedatabase
* against the contents of the directory.
*/
inArea = 0;
while (fread(&file, sizeof(file), 1, pFile) == 1) {
iTotal++;
inArea++;
sprintf(newdir, "%s/%s", area.Path, file.LName);
sprintf(mname, "%s/%s", area.Path, file.Name);
if (file_exist(newdir, R_OK) && file_exist(mname, R_OK)) {
Syslog('+', "File %s area %d not on disk.", newdir, i);
if (!file.NoKill) {
file.Deleted = TRUE;
do_pack = TRUE;
}
iErrors++;
file.Missing = TRUE;
fseek(pFile, - sizeof(file), SEEK_CUR);
fwrite(&file, sizeof(file), 1, pFile);
} else {
/*
* File exists, now check the file.
*/
Marker();
Update = FALSE;
strcpy(temp, file.LName);
name_mangle(temp);
sprintf(mname, "%s/%s", area.Path, temp);
if (strcmp(file.Name, temp)) {
Syslog('!', "Converted %s to %s", file.Name, temp);
tname = calloc(PATH_MAX, sizeof(char));
sprintf(tname, "%s/%s", area.Path, file.Name);
rename(tname, mname);
free(tname);
strncpy(file.Name, temp, 12);
iErrors++;
Update = TRUE;
}
/*
* If 8.3 and LFN are the same, try to rename the LFN to lowercase.
*/
if (strcmp(file.Name, file.LName) == 0) {
/*
* 8.3 and LFN are the same.
*/
tname = calloc(PATH_MAX, sizeof(char));
sprintf(tname, "%s/%s", area.Path, file.LName);
for (j = 0; j < strlen(file.LName); j++)
file.LName[j] = tolower(file.LName[j]);
sprintf(newdir, "%s/%s", area.Path, file.LName);
if (strcmp(tname, newdir)) {
Syslog('+', "Rename LFN from %s to %s", file.Name, file.LName);
rename(tname, newdir);
Update = TRUE;
}
free(tname);
}
/*
* At this point we may have (depending on the upgrade level)
* a real file with a long name or a real file with a short name
* or both. One of them may also be a symbolic link or not exist
* at all. Whatever it was, make it good.
*/
if ((lstat(newdir, &stb) == 0) && ((stb.st_mode & S_IFLNK) != S_IFLNK)) {
/*
* Long filename is a regular file and not a symbolic link.
*/
if (lstat(mname, &stb) == 0) {
/*
* 8.3 name exists, is it a real file?
*/
if ((stb.st_mode & S_IFLNK) != S_IFLNK) {
unlink(newdir);
symlink(mname, newdir);
Syslog('+', "%s changed into symbolic link", newdir);
iErrors++;
} else {
/*
* 8.3 is a symbolic link.
*/
unlink(mname);
rename(newdir, mname);
symlink(mname, newdir);
Syslog('+', "%s changed to real file", mname);
iErrors++;
}
} else {
/*
* No 8.3 name on disk.
*/
rename(newdir, mname);
symlink(mname, newdir);
Syslog('+', "%s changed to real file and created symbolic link", mname);
iErrors++;
}
} else if ((lstat(mname, &stb) == 0) && ((stb.st_mode & S_IFLNK) != S_IFLNK)) {
/*
* Short filename is a real file.
*/
if (lstat(newdir, &stb) == 0) {
/*
* LFN exists, is it a real file?
*/
if ((stb.st_mode & S_IFLNK) != S_IFLNK) {
/*
* LFN is a real filename too.
*/
unlink(newdir);
symlink(mname, newdir);
Syslog('+', "%s changed into symbolic link", newdir);
iErrors++;
}
} else {
/*
* No LFN, create symbolic link
*/
symlink(mname, newdir);
Syslog('+', "%s created symbolic link", newdir);
iErrors++;
}
} else {
/*
* Weird, could not happen
*/
Syslog('!', "Weird problem, %s is no regular file", newdir);
}
/*
* It could be that there is a thumbnail made of the LFN.
*/
tname = calloc(PATH_MAX, sizeof(char));
sprintf(tname, "%s/.%s", area.Path, file.LName);
if (file_exist(tname, R_OK) == 0) {
Syslog('+', "Removing thumbnail %s", tname);
iErrors++;
unlink(tname);
}
free(tname);
if (file_time(newdir) != file.FileDate) {
Syslog('!', "Date mismatch area %d file %s", i, file.LName);
file.FileDate = file_time(newdir);
iErrors++;
Update = TRUE;
}
if (file_size(newdir) != file.Size) {
Syslog('!', "Size mismatch area %d file %s", i, file.LName);
file.Size = file_size(newdir);
iErrors++;
Update = TRUE;
}
if (file_crc(newdir, CFG.slow_util && do_quiet) != file.Crc32) {
Syslog('!', "CRC error area %d, file %s", i, file.LName);
file.Crc32 = file_crc(newdir, CFG.slow_util && do_quiet);
iErrors++;
Update = TRUE;
}
Marker();
if (Update) {
fseek(pFile, - sizeof(file), SEEK_CUR);
fwrite(&file, sizeof(file), 1, pFile);
}
}
}
if (inArea == 0)
Syslog('+', "Warning: area %d (%s) is empty", i, area.Name);
/*
* Check files in the directory against the database.
* This test is skipped for CD-rom.
*/
if (!area.CDrom) {
if ((dp = opendir(area.Path)) != NULL) {
while ((de = readdir(dp)) != NULL) {
if (de->d_name[0] != '.') {
Marker();
Found = FALSE;
rewind(pFile);
while (fread(&file, sizeof(file), 1, pFile) == 1) {
if ((strcmp(file.LName, de->d_name) == 0) || (strcmp(file.Name, de->d_name) == 0)) {
if (!Found) {
Found = TRUE;
} else {
/*
* Record has been found before, so this must be
* a double record.
*/
Syslog('!', "Double file record area %d file %s", i, file.LName);
iErrors++;
file.Double = TRUE;
do_pack = TRUE;
fseek(pFile, - sizeof(file), SEEK_CUR);
fwrite(&file, sizeof(file), 1, pFile);
}
}
}
if ((!Found) && (strncmp(de->d_name, "files.bbs", 9)) &&
(strncmp(de->d_name, "files.bak", 9)) &&
(strncmp(de->d_name, "00index", 7)) &&
(strncmp(de->d_name, "header", 6)) &&
(strncmp(de->d_name, "index", 5)) &&
(strncmp(de->d_name, "readme", 6))) {
sprintf(fn, "%s/%s", area.Path, de->d_name);
if (stat(fn, &stb) == 0)
if (S_ISREG(stb.st_mode)) {
if (unlink(fn) == 0) {
Syslog('!', "%s not in fdb, deleted from disk", fn);
iErrors++;
} else {
WriteError("$%s not in fdb, cannot delete", fn);
}
}
}
}
}
closedir(dp);
} else {
WriteError("Can't open %s", area.Path);
}
}
fclose(pFile);
chmod(fAreas, 0660);
iAreasNew++;
} else {
if (strlen(area.Name) == 0) {
sprintf(fAreas, "%s/fdb/fdb%d.data", getenv("MBSE_ROOT"), i);
if (unlink(fAreas) == 0) {
Syslog('+', "Removed obsolete %s", fAreas);
}
}
} /* if area.Available */
}
fclose(pAreas);
if (!do_quiet) {
printf("\r \r");
fflush(stdout);
}
free(mname);
free(temp);
free(newdir);
free(sAreas);
free(fAreas);
Syslog('+', "Check Areas [%5d] Files [%5d] Errors [%5d]", iAreasNew, iTotal, iErrors);
}