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/*
* udevdb.c
*
* Userspace devfs
*
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2003 IBM Corp.
*
* This program 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 version 2 of the License.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
* udev database library
*/
#define _KLIBC_HAS_ARCH_SIG_ATOMIC_T
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <errno.h>
#include <signal.h>
#include "udev_version.h"
#include "udev.h"
#include "namedev.h"
#include "udevdb.h"
#include "tdb/tdb.h"
#include "libsysfs/libsysfs.h"
static TDB_CONTEXT *udevdb;
int udevdb_add_dev(const char *path, const struct udevice *dev)
{
TDB_DATA key, data;
char keystr[SYSFS_PATH_MAX];
if ((path == NULL) || (dev == NULL))
return -ENODEV;
memset(keystr, 0, NAME_SIZE);
strcpy(keystr, path);
key.dptr = keystr;
key.dsize = strlen(keystr) + 1;
data.dptr = (void *)dev;
data.dsize = sizeof(*dev);
return tdb_store(udevdb, key, data, TDB_REPLACE);
}
int udevdb_get_dev(const char *path, struct udevice *dev)
{
TDB_DATA key, data;
if (path == NULL)
return -ENODEV;
key.dptr = (void *)path;
key.dsize = strlen(path) + 1;
data = tdb_fetch(udevdb, key);
if (data.dptr == NULL || data.dsize == 0)
return -ENODEV;
memcpy(dev, data.dptr, sizeof(*dev));
return 0;
}
int udevdb_delete_dev(const char *path)
{
TDB_DATA key;
char keystr[SYSFS_PATH_MAX];
if (path == NULL)
return -EINVAL;
memset(keystr, 0, sizeof(keystr));
strcpy(keystr, path);
key.dptr = keystr;
key.dsize = strlen(keystr) + 1;
return tdb_delete(udevdb, key);
}
/**
* udevdb_exit: closes database
*/
void udevdb_exit(void)
{
if (udevdb != NULL) {
tdb_close(udevdb);
udevdb = NULL;
}
}
/**
* udevdb_init: initializes database
* @init_flag: UDEVDB_INTERNAL - database stays in memory
* UDEVDB_DEFAULT - database is written to a file
*/
int udevdb_init(int init_flag)
{
if (init_flag != UDEVDB_DEFAULT && init_flag != UDEVDB_INTERNAL)
return -EINVAL;
udevdb = tdb_open(udev_db_filename, 0, init_flag, O_RDWR | O_CREAT, 0644);
if (udevdb == NULL) {
if (init_flag == UDEVDB_INTERNAL)
dbg("unable to initialize in-memory database");
else
dbg("unable to initialize database at '%s'", udev_db_filename);
return -EINVAL;
}
return 0;
}
/**
* udevdb_init: open database for reading
*/
int udevdb_open_ro(void)
{
udevdb = tdb_open(udev_db_filename, 0, 0, O_RDONLY, 0);
if (udevdb == NULL) {
dbg("unable to open database at '%s'", udev_db_filename);
return -EINVAL;
}
return 0;
}
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