/*
* udev database library
*/
+#define _KLIBC_HAS_ARCH_SIG_ATOMIC_T
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include "udev_version.h"
#include "udev.h"
+#include "logging.h"
#include "namedev.h"
#include "udevdb.h"
#include "tdb/tdb.h"
static TDB_CONTEXT *udevdb;
-struct sysfsdb_record {
- char name[PATH_SIZE];
-};
-/**
- * namedb_record - device name is key, remaining udevice info stored here.
- */
-struct namedb_record {
- char sysfs_dev_path[PATH_SIZE];
- char class_dev_name[NAME_SIZE];
- char class_name[NAME_SIZE];
- char id[ID_SIZE];
- char type;
- int major;
- int minor;
- mode_t 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(UDEV_CONFIG_DIR UDEV_DB, 0, method, O_RDWR | O_CREAT, 0644);
- if (udevdb == NULL) {
- if (method == 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;
-}
-
-static struct sysfsdb_record *sysfsdb_fetch(const char *path)
+int udevdb_add_dev(const char *path, const struct udevice *dev)
{
TDB_DATA key, data;
- char keystr[PATH_SIZE+2];
- struct sysfsdb_record *rec = NULL;
+ char keystr[SYSFS_PATH_MAX];
- if (strlen(path) >= PATH_SIZE)
- return NULL;
+ if ((path == NULL) || (dev == NULL))
+ return -ENODEV;
- memset(keystr, 0, sizeof(keystr));
+ memset(keystr, 0, NAME_SIZE);
strcpy(keystr, path);
-
- dbg("keystr = %s", keystr);
-
- key.dptr = (void *)keystr;
+ key.dptr = keystr;
key.dsize = strlen(keystr) + 1;
- data = tdb_fetch(udevdb, key);
- if (data.dptr == NULL || data.dsize == 0) {
- dbg("tdb_fetch did not work :(");
- return NULL;
- }
+ data.dptr = (void *)dev;
+ data.dsize = sizeof(*dev);
- rec = (struct sysfsdb_record *)malloc(sizeof(struct sysfsdb_record));
- if (rec == NULL) {
- free(data.dptr);
- return NULL;
- }
-
- memcpy(rec, data.dptr, sizeof(struct sysfsdb_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)
+int udevdb_get_dev(const char *path, struct udevice *dev)
{
TDB_DATA key, data;
- char nm_keystr[NAME_SIZE];
- struct namedb_record *nrec = NULL;
- if (name == NULL)
- return NULL;
- if (strlen(name) >= NAME_SIZE)
- return NULL;
-
- memset(nm_keystr, 0, NAME_SIZE);
- strcpy(nm_keystr, name);
+ if (path == NULL)
+ return -ENODEV;
- 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;
-}
-
-static int sysfs_store(const char *path, const struct udevice *dev)
-{
- TDB_DATA key, data;
- char keystr[PATH_SIZE+2];
- struct sysfsdb_record rec;
- int retval = 0;
-
- if (dev == NULL)
return -ENODEV;
- memset(keystr, 0, sizeof(keystr));
- strcpy(keystr, path);
-
- 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;
-
- if (dev == NULL)
- return -1;
-
- memset(keystr, 0, NAME_SIZE);
- strcpy(keystr, dev->name);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- strcpy(rec.sysfs_dev_path, dev->sysfs_dev_path);
- strcpy(rec.id, dev->bus_id);
- strcpy(rec.class_dev_name, dev->class_dev_name);
- strcpy(rec.class_name, dev->class_name);
- 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;
+ memcpy(dev, data.dptr, sizeof(*dev));
+ return 0;
}
-/**
- * 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;
-
- if (name == NULL)
- return -1;
- if (strlen(name) >= NAME_SIZE)
- return -1;
+ char keystr[SYSFS_PATH_MAX];
- memset(keystr, 0, NAME_SIZE);
- strcpy(keystr, name);
-
- key.dptr = (void *)keystr;
- key.dsize = strlen(keystr) + 1;
-
- retval = tdb_delete(udevdb, key);
- return retval;
-}
-
-static int sysfs_delete(const char *path)
-{
- TDB_DATA key;
- char keystr[PATH_SIZE];
+ 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_delete_udevice
+ * udevdb_exit: closes database
*/
-int udevdb_delete_udevice(const char *name)
+void udevdb_exit(void)
{
- struct namedb_record *nrec = NULL;
-
- if (name == NULL)
- return -1;
-
- nrec = namedb_fetch(name);
- if (nrec == NULL)
- return -1;
-
- namedb_delete(name);
- free(nrec);
-
- return 0;
+ if (udevdb != NULL) {
+ tdb_close(udevdb);
+ udevdb = NULL;
+ }
}
/**
- * udevdb_add_device: adds class device to database
+ * udevdb_init: initializes database
+ * @init_flag: UDEVDB_INTERNAL - database stays in memory
+ * UDEVDB_DEFAULT - database is written to a file
*/
-int udevdb_add_device(const char *device, const struct sysfs_class_device *class_dev, const char *name, char type, int major, int minor, int mode)
+int udevdb_init(int init_flag)
{
- struct udevice dbdev;
-
- if (class_dev == NULL)
- return -ENODEV;
+ if (init_flag != UDEVDB_DEFAULT && init_flag != UDEVDB_INTERNAL)
+ return -EINVAL;
- memset(&dbdev, 0, sizeof(dbdev));
- strncpy(dbdev.name, name, NAME_SIZE);
- if (class_dev->sysdevice) {
- strncpy(dbdev.sysfs_dev_path, class_dev->sysdevice->directory->path, PATH_SIZE);
- strncpy(dbdev.bus_id, class_dev->sysdevice->bus_id, ID_SIZE);
+ 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 -EACCES;
}
- strncpy(dbdev.class_dev_name, class_dev->name, NAME_SIZE);
-// if ((sysfs_get_name_from_path(subsystem, dbdev.class_name, NAME_SIZE)) != 0)
-// strcpy(dbdev.class_name, "unknown");
- dbdev.type = type;
- dbdev.major = major;
- dbdev.minor = minor;
- dbdev.mode = mode;
-
- if ((sysfs_store(device, &dbdev)) != 0)
- return -1;
-// if ((namedb_store(&dbdev)) != 0)
-// return -1;
-
return 0;
}
/**
- * udevdb_get_device: grab's device by name
+ * udevdb_open_ro: open database for reading
*/
-struct udevice *udevdb_get_udevice(const char *name)
+int udevdb_open_ro(void)
{
- 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;
+ 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 -EACCES;
}
+ return 0;
+}
- strcpy(dev->name, name);
- strcpy(dev->sysfs_dev_path, nrec->sysfs_dev_path);
- strcpy(dev->class_dev_name, nrec->class_dev_name);
- strcpy(dev->class_name, nrec->class_name);
- strcpy(dev->bus_id, nrec->id);
- dev->type = nrec->type;
- dev->major = nrec->major;
- dev->minor = nrec->minor;
- dev->mode = nrec->mode;
-
- free(nrec);
+static int (*user_record_callback) (char *path, struct udevice *dev);
- return dev;
+static int traverse_callback(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
+{
+ return user_record_callback((char*) key.dptr, (struct udevice*) dbuf.dptr);
}
-int udevdb_get_dev(const char *path, char *name, size_t name_size)
+/**
+ * udevdb_call_foreach: dumps whole database by passing record data to user function
+ * @user_record_handler: user function called for every record in the database
+ */
+int udevdb_call_foreach(int (*user_record_handler) (char *path, struct udevice *dev))
{
- struct sysfsdb_record *rec = NULL;
+ int retval = 0;
- if ((path == NULL) || (name == NULL) || (name_size < 1))
+ if (user_record_handler == NULL) {
+ dbg("invalid user record handling function");
return -EINVAL;
-
- rec = sysfsdb_fetch(path);
- if (rec == NULL)
+ }
+ user_record_callback = user_record_handler;
+ retval = tdb_traverse(udevdb, traverse_callback, NULL);
+ if (retval < 0)
return -ENODEV;
-
- if (strlen(rec->name) >= name_size)
- return -EINVAL;
-
- strncpy(name, rec->name, name_size);
- return 0;
+ else
+ return 0;
}
-int udevdb_delete_dev(const char *path)
-{
- if (path == NULL)
- return -EINVAL;
-
- return sysfs_delete(path);
-}
+static struct udevice *find_dev;
+static char *find_path;
+static const char *find_name;
+static int find_found;
-/**
- * udevdb_exit: closes database
- */
-void udevdb_exit(void)
+static int find_device_by_name(char *path, struct udevice *dev)
{
- udevdb_close();
+ if (strncmp(dev->name, find_name, sizeof(dev->name)) == 0) {
+ memcpy(find_dev, dev, sizeof(*find_dev));
+ strncpy(find_path, path, NAME_SIZE);
+ find_found = 1;
+ /* stop search */
+ return 1;
+ }
+ return 0;
}
/**
- * udevdb_init: initializes database
+ * udevdb_get_dev_byname: search device with given name by traversing the whole database
*/
-int udevdb_init(int init_flag)
+int udevdb_get_dev_byname(const char *name, char *path, struct udevice *dev)
{
- if (init_flag != UDEVDB_DEFAULT && init_flag != UDEVDB_INTERNAL)
+ find_found = 0;
+ find_path = path;
+ find_dev = dev;
+ find_name = name;
+ udevdb_call_foreach(find_device_by_name);
+ if (find_found == 1)
+ return 0;
+ else
return -1;
-
- return udevdb_open(init_flag);
}
~ianmdlvl / elogind.git / blobdiff