137 lines
2.9 KiB
C
137 lines
2.9 KiB
C
/*
|
|
* 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
|
|
*/
|
|
#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);
|
|
}
|
|
|
|
struct udevice *udevdb_get_dev(const char *path)
|
|
{
|
|
TDB_DATA key, data;
|
|
struct udevice *dev;
|
|
|
|
if (path == NULL)
|
|
return NULL;
|
|
|
|
key.dptr = (void *)path;
|
|
key.dsize = strlen(path) + 1;
|
|
|
|
data = tdb_fetch(udevdb, key);
|
|
if (data.dptr == NULL || data.dsize == 0)
|
|
return NULL;
|
|
|
|
dev = malloc(sizeof(*dev));
|
|
if (dev == NULL)
|
|
goto exit;
|
|
|
|
memcpy(dev, data.dptr, sizeof(*dev));
|
|
exit:
|
|
free(data.dptr);
|
|
return dev;
|
|
}
|
|
|
|
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: database can either be in memory - UDEVDB_INTERNAL - or
|
|
* written to a file with UDEVDB_DEFAULT.
|
|
*/
|
|
int udevdb_init(int init_flag)
|
|
{
|
|
if (init_flag != UDEVDB_DEFAULT && init_flag != UDEVDB_INTERNAL)
|
|
return -EINVAL;
|
|
|
|
udevdb = tdb_open(UDEV_CONFIG_DIR UDEV_DB, 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_CONFIG_DIR UDEV_DB);
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|