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/***
This file is part of avahi.
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
avahi 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 Lesser General
Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <config.h>
#ifdef HAVE_GDBM
#include <gdbm.h>
#endif
#ifdef HAVE_DBM
#include <ndbm.h>
#include <fcntl.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <stdio.h>
#include <avahi-common/malloc.h>
#include "stdb.h"
#ifdef HAVE_GDBM
static GDBM_FILE gdbm_file = NULL;
#endif
#ifdef HAVE_DBM
static DBM *dbm_file = NULL;
#endif
static char *buffer = NULL;
static char *enum_key = NULL;
static int init(void) {
#ifdef HAVE_GDBM
if (gdbm_file)
return 0;
if (!(gdbm_file = gdbm_open((char*) DATABASE_FILE, 0, GDBM_READER, 0, NULL)))
return -1;
#endif
#ifdef HAVE_DBM
if (dbm_file)
return 0;
if (!(dbm_file = dbm_open((char*) DATABASE_FILE, O_RDONLY, 0)))
return -1;
#endif
return 0;
}
const char* stdb_lookup(const char *name) {
datum key, data;
const char *loc;
if (init() < 0)
goto fail;
data.dptr = NULL;
data.dsize = 0;
if ((loc = setlocale(LC_MESSAGES, NULL))) {
char k[256];
snprintf(k, sizeof(k), "%s[%s]", name, loc);
key.dptr = k;
key.dsize = strlen(k);
#ifdef HAVE_GDBM
data = gdbm_fetch(gdbm_file, key);
#endif
#ifdef HAVE_DBM
data = dbm_fetch(dbm_file, key);
#endif
if (!data.dptr) {
char l[32], *e;
snprintf(l, sizeof(l), "%s", loc);
if ((e = strchr(l, '@'))) {
*e = 0;
snprintf(k, sizeof(k), "%s[%s]", name, l);
key.dptr = k;
key.dsize = strlen(k);
#ifdef HAVE_GDBM
data = gdbm_fetch(gdbm_file, key);
#endif
#ifdef HAVE_DBM
data = dbm_fetch(dbm_file, key);
#endif
}
if (!data.dptr) {
if ((e = strchr(l, '_'))) {
*e = 0;
snprintf(k, sizeof(k), "%s[%s]", name, l);
key.dptr = k;
key.dsize = strlen(k);
#ifdef HAVE_GDBM
data = gdbm_fetch(gdbm_file, key);
#endif
#ifdef HAVE_DBM
data = dbm_fetch(dbm_file, key);
#endif
}
}
}
}
if (!data.dptr) {
key.dptr = (char*) name;
key.dsize = strlen(name);
#ifdef HAVE_GDBM
data = gdbm_fetch(gdbm_file, key);
#endif
#ifdef HAVE_DBM
data = dbm_fetch(dbm_file, key);
#endif
}
if (!data.dptr)
goto fail;
avahi_free(buffer);
buffer = avahi_strndup(data.dptr, data.dsize);
free(data.dptr);
return buffer;
fail:
return name;
}
void stdb_shutdown(void) {
#ifdef HAVE_GDBM
if (gdbm_file)
gdbm_close(gdbm_file);
gdbm_file = NULL;
#endif
#ifdef HAVE_DBM
if (dbm_file)
dbm_close(dbm_file);
dbm_file = NULL;
#endif
avahi_free(buffer);
avahi_free(enum_key);
buffer = enum_key = NULL;
}
char *stdb_getent(void) {
datum key;
if (init() < 0)
return NULL;
for (;;) {
if (!enum_key) {
#ifdef HAVE_GDBM
key = gdbm_firstkey(gdbm_file);
#endif
#ifdef HAVE_DBM
key = dbm_firstkey(dbm_file);
#endif
} else {
key.dptr = enum_key;
key.dsize = strlen(enum_key);
#ifdef HAVE_GDBM
key = gdbm_nextkey(gdbm_file, key);
#endif
#ifdef HAVE_DBM
key = dbm_nextkey(dbm_file);
#endif
}
avahi_free(enum_key);
enum_key = NULL;
if (!key.dptr)
return NULL;
enum_key = avahi_strndup(key.dptr, key.dsize);
free(key.dptr);
if (!strchr(enum_key, '['))
return enum_key;
}
}
void stdb_setent(void) {
avahi_free(enum_key);
enum_key = NULL;
}
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