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f7b4eca455
01-overall-whitespace+debug-text-conditioning.diff o cleanup whitespace o clarify a few comments o enclose all printed debug string values in ''
137 lines
2.9 KiB
C
137 lines
2.9 KiB
C
/*
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* udevdb.c
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*
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* Userspace devfs
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*
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* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2003 IBM Corp.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/*
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* udev database library
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <signal.h>
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#include "udev_version.h"
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#include "udev.h"
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#include "namedev.h"
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#include "udevdb.h"
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#include "tdb/tdb.h"
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#include "libsysfs/libsysfs.h"
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static TDB_CONTEXT *udevdb;
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int udevdb_add_dev(const char *path, const struct udevice *dev)
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{
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TDB_DATA key, data;
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char keystr[SYSFS_PATH_MAX];
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if ((path == NULL) || (dev == NULL))
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return -ENODEV;
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memset(keystr, 0, NAME_SIZE);
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strcpy(keystr, path);
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key.dptr = keystr;
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key.dsize = strlen(keystr) + 1;
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data.dptr = (void *)dev;
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data.dsize = sizeof(*dev);
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return tdb_store(udevdb, key, data, TDB_REPLACE);
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}
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struct udevice *udevdb_get_dev(const char *path)
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{
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TDB_DATA key, data;
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struct udevice *dev;
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if (path == NULL)
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return NULL;
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key.dptr = (void *)path;
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key.dsize = strlen(path) + 1;
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data = tdb_fetch(udevdb, key);
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if (data.dptr == NULL || data.dsize == 0)
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return NULL;
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dev = malloc(sizeof(*dev));
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if (dev == NULL)
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goto exit;
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memcpy(dev, data.dptr, sizeof(*dev));
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exit:
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free(data.dptr);
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return dev;
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}
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int udevdb_delete_dev(const char *path)
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{
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TDB_DATA key;
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char keystr[SYSFS_PATH_MAX];
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if (path == NULL)
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return -EINVAL;
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memset(keystr, 0, sizeof(keystr));
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strcpy(keystr, path);
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key.dptr = keystr;
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key.dsize = strlen(keystr) + 1;
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return tdb_delete(udevdb, key);
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}
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/**
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* udevdb_exit: closes database
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*/
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void udevdb_exit(void)
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{
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if (udevdb != NULL) {
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tdb_close(udevdb);
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udevdb = NULL;
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}
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}
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/**
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* udevdb_init: initializes database
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* @init_flag: UDEVDB_INTERNAL - database stays in memory
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* UDEVDB_DEFAULT - database is written to a file
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*/
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int udevdb_init(int init_flag)
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{
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if (init_flag != UDEVDB_DEFAULT && init_flag != UDEVDB_INTERNAL)
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return -EINVAL;
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udevdb = tdb_open(udev_db_filename, 0, init_flag, O_RDWR | O_CREAT, 0644);
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if (udevdb == NULL) {
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if (init_flag == UDEVDB_INTERNAL)
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dbg("unable to initialize in-memory database");
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else
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dbg("unable to initialize database at '%s'", udev_db_filename);
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return -EINVAL;
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}
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return 0;
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}
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