/* Throws out all entries marked as unused, by walking through the
* filedb and moving all good ones towards the top.
*/
static void filedb_cleanup(FILE *fdb)
{
long oldpos, newpos, temppos;
filedb_entry *fdbe = NULL;
filedb_readtop(fdb, NULL); /* Skip DB header */
newpos = temppos = oldpos = ftell(fdb);
fseek(fdb, oldpos, SEEK_SET); /* Go to beginning */
while (!feof(fdb)) { /* Loop until EOF */
fdbe = filedb_getfile(fdb, oldpos, GET_HEADER); /* Read header */
if (fdbe) {
if (fdbe->stat & FILE_UNUSED) { /* Found dirt! */
free_fdbe(&fdbe);
while (!feof(fdb)) { /* Loop until EOF */
newpos = ftell(fdb);
fdbe = filedb_getfile(fdb, newpos, GET_FULL); /* Read next entry */
if (!fdbe)
break;
if (!(fdbe->stat & FILE_UNUSED)) { /* Not unused? */
temppos = ftell(fdb);
filedb_movefile(fdb, oldpos, fdbe); /* Move to top */
oldpos = ftell(fdb);
fseek(fdb, temppos, SEEK_SET);
}
free_fdbe(&fdbe);
}
} else {
free_fdbe(&fdbe);
oldpos = ftell(fdb);
}
}
}
ftruncate(fileno(fdb), oldpos); /* Shorten file */
}
/* Merges empty entries to one big entry, if they directly
* follow each other. Does this for the complete DB.
* This considerably speeds up several actions performed on
* the db.
*/
static void filedb_mergeempty(FILE *fdb)
{
filedb_entry *fdbe_t, *fdbe_i;
int modified;
filedb_readtop(fdb, NULL);
while (!feof(fdb))
{
fdbe_t = filedb_getfile(fdb, ftell(fdb), GET_HEADER);
if (fdbe_t) {
if (fdbe_t->stat & FILE_UNUSED) {
modified = 0;
fdbe_i = filedb_getfile(fdb, ftell(fdb), GET_HEADER);
while (fdbe_i) {
/* Is this entry in use? */
if (!(fdbe_i->stat & FILE_UNUSED))
break; /* It is, exit loop. */
/* Woohoo, found an empty entry. Append it's space to
* our target entry's buffer space.
*/
fdbe_t->buf_len += sizeof(filedb_header) + fdbe_i->buf_len;
modified++;
free_fdbe(&fdbe_i);
/* Get next file entry */
fdbe_i = filedb_getfile(fdb, ftell(fdb), GET_HEADER);
}
/* Did we exit the loop because of a used entry? */
if (fdbe_i) {
free_fdbe(&fdbe_i);
/* Did we find any empty entries before? */
if (modified)
filedb_updatefile(fdb, fdbe_t->pos, fdbe_t, UPDATE_SIZE);
/* ... or because we hit EOF? */
} else {
/* Truncate trailing empty entries and exit. */
ftruncate(fileno(fdb), fdbe_t->pos);
free_fdbe(&fdbe_t);
return;
}
}
free_fdbe(&fdbe_t);
}
}
}
/* Searches for a suitable place to write an entry which uses tot
* bytes for dynamic data.
*
* * If there is no such existing entry, it just points to the
* end of the DB.
* * If it finds an empty entry and it has enough space to fit
* in another entry, we split it up and only use the space we
* really need.
*
* Note: We can assume that empty entries' dyn_lengths are zero.
* Therefore we only need to check buf_len.
*/
static filedb_entry *filedb_findempty(FILE *fdb, int tot)
{
filedb_entry *fdbe;
filedb_readtop(fdb, NULL);
fdbe = filedb_getfile(fdb, ftell(fdb), GET_HEADER);
while (fdbe) {
/* Found an existing, empty entry? */
if ((fdbe->stat & FILE_UNUSED) && (fdbe->buf_len >= tot)) {
/* Do we have enough space to split up the entry to form
* another empty entry? That way we would use the space
* more efficiently.
*/
if (fdbe->buf_len > (tot + sizeof(filedb_header) + FILEDB_ESTDYN)) {
filedb_entry *fdbe_oe;
/* Create new entry containing the additional space */
fdbe_oe = malloc_fdbe();
fdbe_oe->stat = FILE_UNUSED;
fdbe_oe->pos = fdbe->pos + sizeof(filedb_header) + tot;
fdbe_oe->buf_len = fdbe->buf_len - tot - sizeof(filedb_header);
filedb_movefile(fdb, fdbe_oe->pos, fdbe_oe);
free_fdbe(&fdbe_oe);
/* Cut down buf_len of entry as the rest is now used in the new
* entry.
*/
fdbe->buf_len = tot;
}
return fdbe;
}
free_fdbe(&fdbe);
fdbe = filedb_getfile(fdb, ftell(fdb), GET_HEADER);
}
/* No existing entries, so create new entry at end of DB instead. */
fdbe = malloc_fdbe();
fseek(fdb, 0L, SEEK_END);
fdbe->pos = ftell(fdb);
return fdbe;
}
static void filedb_getdirs(Tcl_Interp *irp, char *dir)
{
FILE *fdb;
filedb_entry *fdbe;
fdb = filedb_open(dir, 0);
if (!fdb)
return;
filedb_readtop(fdb, NULL);
while (!feof(fdb)) {
fdbe = filedb_getfile(fdb, ftell(fdb), GET_FILENAME);
if (fdbe) {
if ((!(fdbe->stat & FILE_UNUSED)) && (fdbe->stat & FILE_DIR))
Tcl_AppendElement(irp, fdbe->filename);
free_fdbe(&fdbe);
}
}
filedb_close(fdb);
}
/* Searches the filedb for a file matching the specified mask, starting
* at position 'pos'. The first matching file is returned.
*/
static filedb_entry *_filedb_matchfile(FILE *fdb, long pos, char *match,
char *file, int line)
{
filedb_entry *fdbe = NULL;
fseek(fdb, pos, SEEK_SET);
while (!feof(fdb)) {
pos = ftell(fdb);
fdbe = filedb_getfile(fdb, pos, GET_FILENAME);
if (fdbe) {
if (!(fdbe->stat & FILE_UNUSED) && /* Not unused? */
wild_match_file(match, fdbe->filename)) { /* Matches our mask? */
free_fdbe(&fdbe);
fdbe = _filedb_getfile(fdb, pos, GET_FULL, file, line); /* Save all data now */
return fdbe;
}
free_fdbe(&fdbe);
}
}
return NULL;
}
/* Outputs a sorted list of files/directories matching the mask,
* to idx.
*/
static void filedb_ls(FILE *fdb, int idx, char *mask, int showall)
{
int ok = 0, cnt = 0, is = 0;
char s1[81], *p = NULL;
struct flag_record user = { FR_GLOBAL | FR_CHAN, 0, 0, 0, 0, 0 };
filedb_entry *fdbe = NULL;
filelist_t *flist = NULL;
flist = filelist_new();
filedb_readtop(fdb, NULL);
fdbe = filedb_getfile(fdb, ftell(fdb), GET_FULL);
while (fdbe) {
ok = 1;
if (fdbe->stat & FILE_UNUSED)
ok = 0;
if (ok && (fdbe->stat & FILE_DIR) && fdbe->flags_req) {
/* Check permissions */
struct flag_record req = { FR_GLOBAL | FR_CHAN, 0, 0, 0, 0, 0 };
break_down_flags(fdbe->flags_req, &req, NULL);
get_user_flagrec(dcc[idx].user, &user, dcc[idx].u.file->chat->con_chan);
if (!flagrec_ok(&req, &user)) {
ok = 0;
}
}
if (ok)
is = 1;
if (ok && !wild_match_file(mask, fdbe->filename))
ok = 0;
if (ok && (fdbe->stat & FILE_HIDDEN) && !(showall))
ok = 0;
if (ok) {
/* Display it! */
if (cnt == 0) {
dprintf(idx, FILES_LSHEAD1);
dprintf(idx, FILES_LSHEAD2);
}
filelist_add(flist, fdbe->filename);
if (fdbe->stat & FILE_DIR) {
char *s2 = NULL, *s3 = NULL;
/* Too long? */
if (strlen(fdbe->filename) > 45) {
/* Display the filename on its own line. */
s2 = nmalloc(strlen(fdbe->filename) + 3);
sprintf(s2, "%s/\n", fdbe->filename);
filelist_addout(flist, s2);
my_free(s2);
} else {
s2 = nmalloc(strlen(fdbe->filename) + 2);
sprintf(s2, "%s/", fdbe->filename);
}
/* Note: You have to keep the sprintf and the nmalloc statements
* in sync, i.e. always check that you allocate enough
* memory.
*/
if ((fdbe->flags_req) && (user.global &(USER_MASTER | USER_JANITOR))) {
s3 = nmalloc(42 + strlen(s2 ? s2 : "") + 6 +
strlen(FILES_REQUIRES) + strlen(fdbe->flags_req) + 1 +
strlen(fdbe->chan ? fdbe->chan : "") + 1);
sprintf(s3, "%-30s <DIR%s> (%s %s%s%s)\n", s2,
fdbe->stat & FILE_SHARE ?
" SHARE" : "", FILES_REQUIRES, fdbe->flags_req,
fdbe->chan ? " " : "", fdbe->chan ? fdbe->chan : "");
} else {
s3 = nmalloc(38 + strlen(s2 ? s2 : ""));
sprintf(s3, "%-30s <DIR>\n", s2 ? s2 : "");
}
if (s2)
my_free(s2);
filelist_addout(flist, s3);
my_free(s3);
} else {
char s2[41], t[50], *s3 = NULL, *s4;
s2[0] = 0;
if (showall) {
if (fdbe->stat & FILE_SHARE)
strcat(s2, " (shr)");
if (fdbe->stat & FILE_HIDDEN)
strcat(s2, " (hid)");
}
egg_strftime(t, 10, "%d%b%Y", localtime(&fdbe->uploaded));
if (fdbe->size < 1024)
sprintf(s1, "%5d", fdbe->size);
else
sprintf(s1, "%4dk", (int) (fdbe->size / 1024));
if (fdbe->sharelink)
strcpy(s1, " ");
/* Too long? */
if (strlen(fdbe->filename) > 30) {
s3 = nmalloc(strlen(fdbe->filename) + 2);
sprintf(s3, "%s\n", fdbe->filename);
filelist_addout(flist, s3);
my_free(s3);
/* Causes filename to be displayed on its own line */
} else
malloc_strcpy(s3, fdbe->filename);
s4 = nmalloc(69 + strlen(s3 ? s3 : "") + strlen(s1) +
strlen(fdbe->uploader) + strlen(t) + strlen(s2));
sprintf(s4, "%-30s %s %-9s (%s) %6d%s\n", s3 ? s3 : "", s1,
fdbe->uploader, t, fdbe->gots, s2);
if (s3)
my_free(s3);
filelist_addout(flist, s4);
my_free(s4);
if (fdbe->sharelink) {
s4 = nmalloc(9 + strlen(fdbe->sharelink));
sprintf(s4, " --> %s\n", fdbe->sharelink);
filelist_addout(flist, s4);
my_free(s4);
}
}
if (fdbe->desc) {
p = strchr(fdbe->desc, '\n');
while (p != NULL) {
*p = 0;
if ((fdbe->desc)[0]) {
char *sd;
sd = nmalloc(strlen(fdbe->desc) + 5);
sprintf(sd, " %s\n", fdbe->desc);
filelist_addout(flist, sd);
my_free(sd);
}
strcpy(fdbe->desc, p + 1);
p = strchr(fdbe->desc, '\n');
}
if ((fdbe->desc)[0]) {
char *sd;
sd = nmalloc(strlen(fdbe->desc) + 5);
sprintf(sd, " %s\n", fdbe->desc);
filelist_addout(flist, sd);
my_free(sd);
}
}
cnt++;
}
free_fdbe(&fdbe);
fdbe = filedb_getfile(fdb, ftell(fdb), GET_FULL);
}
if (is == 0)
dprintf(idx, FILES_NOFILES);
else if (cnt == 0)
dprintf(idx, FILES_NOMATCH);
else {
filelist_sort(flist);
filelist_idxshow(flist, idx);
dprintf(idx, "--- %d file%s.\n", cnt, cnt != 1 ? "s" : "");
}
filelist_free(flist);
}
/* Updates the specified filedb in several ways:
*
* 1. Adds all new files from the directory to the db.
* 2. Removes all stale entries from the db.
* 3. Optimises the db.
*/
static void filedb_update(char *path, FILE *fdb, int sort)
{
struct dirent *dd = NULL;
struct stat st;
filedb_entry *fdbe = NULL;
DIR *dir = NULL;
long where = 0;
char *name = NULL, *s = NULL;
/*
* FIRST: make sure every real file is in the database
*/
dir = opendir(path);
if (dir == NULL) {
putlog(LOG_MISC, "*", FILES_NOUPDATE);
return;
}
dd = readdir(dir);
while (dd != NULL) {
malloc_strcpy(name, dd->d_name);
if (name[0] != '.') {
s = nmalloc(strlen(path) + strlen(name) + 2);
sprintf(s, "%s/%s", path, name);
stat(s, &st);
my_free(s);
filedb_readtop(fdb, NULL);
fdbe = filedb_matchfile(fdb, ftell(fdb), name);
if (!fdbe) {
/* new file! */
fdbe = malloc_fdbe();
malloc_strcpy(fdbe->filename, name);
malloc_strcpy(fdbe->uploader, botnetnick);
fdbe->uploaded = now;
fdbe->size = st.st_size;
if (S_ISDIR(st.st_mode))
fdbe->stat |= FILE_DIR;
filedb_addfile(fdb, fdbe);
} else if (fdbe->size != st.st_size) {
/* update size if needed */
fdbe->size = st.st_size;
filedb_updatefile(fdb, fdbe->pos, fdbe, UPDATE_HEADER);
}
free_fdbe(&fdbe);
}
dd = readdir(dir);
}
if (name)
my_free(name);
closedir(dir);
/*
* SECOND: make sure every db file is real
*/
filedb_readtop(fdb, NULL);
fdbe = filedb_getfile(fdb, ftell(fdb), GET_FILENAME);
while (fdbe) {
where = ftell(fdb);
if (!(fdbe->stat & FILE_UNUSED) && !(fdbe->stat & FILE_ISLINK) &&
fdbe->filename) {
s = nmalloc(strlen(path) + 1 + strlen(fdbe->filename) + 1);
sprintf(s, "%s/%s", path, fdbe->filename);
if (stat(s, &st) != 0)
/* gone file */
filedb_delfile(fdb, fdbe->pos);
my_free(s);
}
free_fdbe(&fdbe);
fdbe = filedb_getfile(fdb, where, GET_FILENAME);
}
/*
* THIRD: optimise database
*
* Instead of sorting, we only clean up the db, because sorting is now
* done on-the-fly when we display the file list.
*/
if (sort)
filedb_cleanup(fdb); /* Cleanup DB */
filedb_timestamp(fdb); /* Write new timestamp */
}
