+/*
+ * 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 <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;
-/**
- * busdb_record - bus and id are keys to look up name of device
- */
-struct busdb_record {
- char name[NAME_SIZE];
-};
-
-/**
- * classdb_record - class name and class device name used as keys to find
- * device name.
- */
-struct classdb_record {
- char name[NAME_SIZE];
-};
-
-/**
- * namedb_record - device name is key, remaining udevice info stored here.
- */
-struct namedb_record {
- char sysfs_path[PATH_SIZE];
- char class_dev_name[NAME_SIZE];
- char class_name[NAME_SIZE];
- char bus[BUS_SIZE];
- char id[ID_SIZE];
- char driver[NAME_SIZE];
- char type;
- int major;
- int minor;
- int mode;
-};
-
-/**
- * udevdb_close: close udev database
- */
-static void udevdb_close(void)
-{
- if (udevdb != NULL) {
- tdb_close(udevdb);
- udevdb = NULL;
- }
-}
-/**
- * udevdb_open: opens udev's database
- * @method: database can either be in memory - UDEVDB_INTERNAL - or
- * written to a file with UDEVDB_DEFAULT.
- */
-static int udevdb_open(int method)
-{
- udevdb = tdb_open(UDEVDB, 0, method, O_RDWR | O_CREAT, 0644);
- if (udevdb == NULL)
- return -1;
- return 0;
-}
-
-/**
- * busdb_fetch
- */
-static struct busdb_record *busdb_fetch(const char *bus, const char *id)
+int udevdb_add_dev(const char *path, const struct udevice *dev)
{
TDB_DATA key, data;
- char keystr[BUS_SIZE+ID_SIZE+2];
- struct busdb_record *rec = NULL;
-
- if (bus == NULL || id == NULL)
- return NULL;
- if (strlen(bus) >= BUS_SIZE || strlen(id) >= ID_SIZE)
- return NULL;
-
- memset(keystr, 0, (BUS_SIZE+ID_SIZE+2));
- strcpy(keystr, bus);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, id);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- data = tdb_fetch(udevdb, key);
- if (data.dptr == NULL || data.dsize == 0)
- return NULL;
-
- rec = (struct busdb_record *)malloc(sizeof(struct busdb_record));
- if (rec == NULL) {
- free(data.dptr);
- return NULL;
- }
-
- memcpy(rec, data.dptr, sizeof(struct busdb_record));
- free(data.dptr);
-
- return rec;
-}
-
-/**
- * classdb_fetch
- */
-static struct classdb_record *classdb_fetch(const char *cls,
- const char *cls_dev)
-{
- TDB_DATA key, data;
- char keystr[NAME_SIZE+NAME_SIZE+2];
- struct classdb_record *rec = NULL;
-
- if (cls == NULL || cls_dev == NULL)
- return NULL;
- if (strlen(cls) >= NAME_SIZE || strlen(cls_dev) >= NAME_SIZE)
- return NULL;
+ char keystr[SYSFS_PATH_MAX];
- memset(keystr, 0, (NAME_SIZE+NAME_SIZE+2));
- strcpy(keystr, cls);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, cls_dev);
+ if ((path == NULL) || (dev == NULL))
+ return -ENODEV;
- key.dptr = (void *)keystr;
+ memset(keystr, 0, NAME_SIZE);
+ strcpy(keystr, path);
+ key.dptr = keystr;
key.dsize = strlen(keystr) + 1;
-
- data = tdb_fetch(udevdb, key);
- if (data.dptr == NULL || data.dsize == 0)
- return NULL;
- rec = (struct classdb_record *)malloc(sizeof(struct classdb_record));
- if (rec == NULL) {
- free(data.dptr);
- return NULL;
- }
+ data.dptr = (void *)dev;
+ data.dsize = sizeof(*dev);
- memcpy(rec, data.dptr, sizeof(struct classdb_record));
- free(data.dptr);
-
- return rec;
+ return tdb_store(udevdb, key, data, TDB_REPLACE);
}
-/**
- * namedb_fetch
- */
-static struct namedb_record *namedb_fetch(const char *name)
+struct udevice *udevdb_get_dev(const char *path)
{
TDB_DATA key, data;
- char nm_keystr[NAME_SIZE];
- struct namedb_record *nrec = NULL;
+ struct udevice *dev;
- if (name == NULL)
- return NULL;
- if (strlen(name) >= NAME_SIZE)
+ if (path == NULL)
return NULL;
- memset(nm_keystr, 0, NAME_SIZE);
- strcpy(nm_keystr, name);
-
- key.dptr = (void *)nm_keystr;
- key.dsize = strlen(nm_keystr) + 1;
+ key.dptr = (void *)path;
+ key.dsize = strlen(path) + 1;
data = tdb_fetch(udevdb, key);
if (data.dptr == NULL || data.dsize == 0)
return NULL;
- nrec = (struct namedb_record *)malloc(sizeof(struct namedb_record));
- if (nrec == NULL) {
- free(data.dptr);
- return NULL;
- }
-
- memcpy(nrec, data.dptr, sizeof(struct namedb_record));
- free(data.dptr);
-
- return nrec;
-}
-
-/**
- * busdb_store
- */
-static int busdb_store(const struct udevice *dev)
-{
- TDB_DATA key, data;
- char keystr[BUS_SIZE+ID_SIZE+2];
- struct busdb_record rec;
- int retval = 0;
-
- if (dev == NULL)
- return -1;
-
- memset(keystr, 0, (BUS_SIZE+ID_SIZE+2));
- strcpy(keystr, dev->bus_name);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, dev->bus_id);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- strcpy(rec.name, dev->name);
-
- data.dptr = (void *) &rec;
- data.dsize = sizeof(rec);
-
- retval = tdb_store(udevdb, key, data, TDB_REPLACE);
- return retval;
-}
-
-/**
- * classdb_store
- */
-static int classdb_store(const struct udevice *dev)
-{
- TDB_DATA key, data;
- char keystr[NAME_SIZE+NAME_SIZE+2];
- struct classdb_record rec;
- int retval = 0;
-
- if (dev == NULL)
- return -1;
-
- memset(keystr, 0, (NAME_SIZE+NAME_SIZE+2));
- strcpy(keystr, dev->class_name);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, dev->class_dev_name);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- strcpy(rec.name, dev->name);
-
- data.dptr = (void *) &rec;
- data.dsize = sizeof(rec);
-
- retval = tdb_store(udevdb, key, data, TDB_REPLACE);
- return retval;
-}
-
-/**
- * namedb_store
- */
-static int namedb_store(const struct udevice *dev)
-{
- TDB_DATA key, data;
- char keystr[NAME_SIZE];
- struct namedb_record rec;
- int retval = 0;
-
+ dev = malloc(sizeof(*dev));
if (dev == NULL)
- return -1;
-
- memset(keystr, 0, NAME_SIZE);
- strcpy(keystr, dev->name);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
+ goto exit;
- strcpy(rec.sysfs_path, dev->sysfs_path);
- strcpy(rec.bus, dev->bus_name);
- strcpy(rec.id, dev->bus_id);
- strcpy(rec.class_dev_name, dev->class_dev_name);
- strcpy(rec.class_name, dev->class_name);
- strcpy(rec.driver, dev->driver);
- rec.type = dev->type;
- rec.major = dev->major;
- rec.minor = dev->minor;
- rec.mode = dev->mode;
-
- data.dptr = (void *) &rec;
- data.dsize = sizeof(rec);
-
- retval = tdb_store(udevdb, key, data, TDB_REPLACE);
- return retval;
-}
-
-/**
- * busdb_delete
- */
-static int busdb_delete(const char *bus, const char *id)
-{
- TDB_DATA key;
- char keystr[BUS_SIZE+ID_SIZE+2];
- int retval = 0;
-
- if (bus == NULL || id == NULL)
- return -1;
- if (strlen(bus) >= BUS_SIZE || strlen(id) >= ID_SIZE)
- return -1;
-
- memset(keystr, 0, (BUS_SIZE+ID_SIZE+2));
- strcpy(keystr, bus);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, id);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- retval = tdb_delete(udevdb, key);
- return retval;
-}
-
-/**
- * classdb_delete
- */
-static int classdb_delete(const char *cls, const char *cls_dev)
-{
- TDB_DATA key;
- char keystr[NAME_SIZE+NAME_SIZE+2];
- int retval = 0;
-
- if (cls == NULL || cls_dev == NULL)
- return -1;
- if (strlen(cls) >= NAME_SIZE || strlen(cls_dev) >= NAME_SIZE)
- return -1;
-
- memset(keystr, 0, (NAME_SIZE+NAME_SIZE+2));
- strcpy(keystr, cls);
- strcat(keystr, UDEVDB_DEL);
- strcat(keystr, cls_dev);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- retval = tdb_delete(udevdb, key);
- return retval;
+ memcpy(dev, data.dptr, sizeof(*dev));
+exit:
+ free(data.dptr);
+ return dev;
}
-/**
- * namedb_delete
- */
-static int namedb_delete(const char *name)
+int udevdb_delete_dev(const char *path)
{
TDB_DATA key;
- char keystr[NAME_SIZE];
- int retval = 0;
+ char keystr[SYSFS_PATH_MAX];
- if (name == NULL)
- return -1;
- if (strlen(name) >= NAME_SIZE)
- return -1;
+ if (path == NULL)
+ return -EINVAL;
- memset(keystr, 0, NAME_SIZE);
- strcpy(keystr, name);
+ memset(keystr, 0, sizeof(keystr));
+ strcpy(keystr, path);
- key.dptr = (void *)keystr;
+ key.dptr = keystr;
key.dsize = strlen(keystr) + 1;
-
- retval = tdb_delete(udevdb, key);
- return retval;
-}
-
-/**
- * udevdb_delete_udevice
- */
-int udevdb_delete_udevice(const char *name)
-{
- struct namedb_record *nrec = NULL;
-
- if (name == NULL)
- return -1;
-
- nrec = namedb_fetch(name);
- if (nrec == NULL)
- return -1;
-
- busdb_delete(nrec->bus, nrec->id);
- classdb_delete(nrec->class_name, nrec->class_dev_name);
- namedb_delete(name);
- free(nrec);
-
- return 0;
-}
-
-/**
- * udevdb_add_udevice: adds udevice to database
- */
-int udevdb_add_udevice(const struct udevice *dev)
-{
- if (dev == NULL)
- return -1;
-
- if ((busdb_store(dev)) != 0)
- return -1;
- if ((classdb_store(dev)) != 0)
- return -1;
- if ((namedb_store(dev)) != 0)
- return -1;
-
- return 0;
-}
-
-/**
- * udevdb_get_device: grab's device by name
- */
-struct udevice *udevdb_get_udevice(const char *name)
-{
- struct namedb_record *nrec = NULL;
- struct udevice *dev = NULL;
-
- if (name == NULL)
- return NULL;
-
- nrec = namedb_fetch(name);
- if (nrec == NULL)
- return NULL;
-
- dev = (struct udevice *)malloc(sizeof(struct udevice));
- if (dev == NULL) {
- free(nrec);
- return NULL;
- }
-
- strcpy(dev->name, name);
- strcpy(dev->sysfs_path, nrec->sysfs_path);
- strcpy(dev->class_dev_name, nrec->class_dev_name);
- strcpy(dev->class_name, nrec->class_name);
- strcpy(dev->bus_name, nrec->bus);
- strcpy(dev->bus_id, nrec->id);
- dev->type = nrec->type;
- dev->major = nrec->major;
- dev->minor = nrec->minor;
- dev->mode = nrec->mode;
-
- free(nrec);
-
- return dev;
-}
-
-/**
- * udevdb_get_device_by_bus
- */
-struct udevice *udevdb_get_udevice_by_bus(const char *bus, const char *id)
-{
- struct busdb_record *brec = NULL;
- struct udevice *dev = NULL;
-
- if (bus == NULL || id == NULL)
- return NULL;
-
- brec = busdb_fetch(bus, id);
- if (brec == NULL)
- return NULL;
-
- dev = udevdb_get_udevice(brec->name);
- free(brec);
-
- return dev;
-}
-
-/**
- * udevdb_get_udevice_by_class
- */
-struct udevice *udevdb_get_udevice_by_class(const char *cls,
- const char *cls_dev)
-{
- struct classdb_record *crec = NULL;
- struct udevice *dev = NULL;
-
- if (cls == NULL || cls_dev == NULL)
- return NULL;
-
- crec = classdb_fetch(cls, cls_dev);
- if (crec == NULL)
- return NULL;
-
- dev = udevdb_get_udevice(crec->name);
- free(crec);
-
- return dev;
+
+ return tdb_delete(udevdb, key);
}
/**
*/
void udevdb_exit(void)
{
- udevdb_close();
+ 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 -1;
-
- return udevdb_open(init_flag);
+ 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;
}
~ianmdlvl / elogind.git / blobdiff