return 0;
}
-/**
- * read_driver_dir: Read driver directory's subdirs and links
- * @driver: Driver to read
- * Returns 0 on success and 1 on failure
- */
-static int read_driver_dir(struct sysfs_driver *driver)
-{
- if (driver == NULL) {
- errno = EINVAL;
- return 1;
- }
- if (driver->directory == NULL) {
- if ((open_driver_dir(driver)) == 1)
- return 1;
- }
- if ((sysfs_read_directory(driver->directory)) != 0) {
- dprintf("Error reading driver directory at %s\n",
- driver->path);
- return 1;
- }
- return 0;
-}
-
/**
* alloc_driver: allocates and initializes driver
* returns struct sysfs_driver with success and NULL with error.
}
/**
- * sysfs_open_driver: opens and initializes driver structure
+ * sysfs_open_driver_path: opens and initializes driver structure
* @path: path to driver directory
* returns struct sysfs_driver with success and NULL with error
*/
-struct sysfs_driver *sysfs_open_driver(const unsigned char *path)
+struct sysfs_driver *sysfs_open_driver_path(const unsigned char *path)
{
struct sysfs_driver *driver = NULL;
return NULL;
}
strcpy(driver->path, path);
+ if ((sysfs_remove_trailing_slash(driver->path)) != 0) {
+ dprintf("Invalid path to driver %s\n", driver->path);
+ sysfs_close_driver(driver);
+ return NULL;
+ }
return driver;
}
return NULL;
}
if (driver->directory->attributes == NULL) {
- if ((sysfs_read_dir_attributes(driver->directory)) != 0) {
- dprintf("Error reading driver attributes\n");
+ if ((sysfs_read_dir_attributes(driver->directory)) != 0)
return NULL;
- }
- } else {
- if ((sysfs_path_is_dir(driver->path)) != 0) {
- dprintf("Driver at %s no longer exists\n",
- driver->path);
- return NULL;
- }
- if ((sysfs_refresh_attributes
- (driver->directory->attributes)) != 0) {
- dprintf("Error refreshing driver attributes\n");
- return NULL;
- }
}
return(driver->directory->attributes);
}
+/**
+ * sysfs_refresh_driver_attributes: refreshes the driver's list of attributes
+ * @driver: sysfs_driver whose attributes to refresh
+ *
+ * NOTE: Upon return, prior references to sysfs_attributes for this driver
+ * _may_ not be valid
+ *
+ * Returns list of attributes on success and NULL on failure
+ */
+struct dlist *sysfs_refresh_driver_attributes(struct sysfs_driver *driver)
+{
+ if (driver == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+ if (driver->directory == NULL)
+ return (sysfs_get_driver_attributes(driver));
+
+ if ((sysfs_refresh_dir_attributes(driver->directory)) != 0) {
+ dprintf("Error refreshing driver attributes\n");
+ return NULL;
+ }
+ return (driver->directory->attributes);
+}
+
/**
* sysfs_get_driver_attr: searches driver's attributes by name
* @drv: driver to look through
struct sysfs_attribute *sysfs_get_driver_attr(struct sysfs_driver *drv,
const unsigned char *name)
{
- struct sysfs_attribute *cur = NULL;
struct dlist *attrlist = NULL;
if (drv == NULL) {
}
attrlist = sysfs_get_driver_attributes(drv);
- if (attrlist != NULL) {
- cur = sysfs_get_directory_attribute(drv->directory,
+ if (attrlist != NULL)
+ return NULL;
+
+ return sysfs_get_directory_attribute(drv->directory,
(unsigned char *)name);
- if (cur != NULL)
- return cur;
- }
- return NULL;
}
/**
if (driver->directory == NULL) {
if ((open_driver_dir(driver)) == 1)
return NULL;
- if ((read_driver_dir(driver)) != 0)
+ if ((sysfs_read_dir_links(driver->directory)) != 0)
return NULL;
}
return(driver->directory->links);
if (driver->directory == NULL) {
if ((open_driver_dir(driver)) == 1)
return NULL;
- if ((read_driver_dir(driver)) != 0)
+ if ((sysfs_read_dir_links(driver->directory)) != 0)
return NULL;
}
if (driver->directory->links != NULL) {
dlist_for_each_data(driver->directory->links, curlink,
struct sysfs_link) {
- device = sysfs_open_device(curlink->target);
+ device = sysfs_open_device_path(curlink->target);
if (device == NULL) {
dprintf("Error opening device at %s\n",
curlink->target);
return (driver->devices);
}
+/**
+ * sysfs_refresh_driver_devices: Refreshes drivers list of devices
+ * @driver: sysfs_driver whose devices list needs to be refreshed
+ *
+ * NOTE: Upon return from this function, prior sysfs_device references from
+ * this driver's list of devices _may_ not be valid
+ *
+ * Returns dlist of devices on success and NULL on failure
+ */
+struct dlist *sysfs_refresh_driver_devices(struct sysfs_driver *driver)
+{
+ if (driver == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ if (driver->devices != NULL) {
+ dlist_destroy(driver->devices);
+ driver->devices = NULL;
+ }
+
+ if (driver->directory == NULL)
+ return (sysfs_get_driver_devices(driver));
+
+ if ((sysfs_refresh_dir_links(driver->directory)) != 0) {
+ dprintf("Error refreshing driver links\n");
+ return NULL;
+ }
+
+ return (sysfs_get_driver_devices(driver));
+}
+
/**
* sysfs_get_driver_device: looks up a device from a list of driver's devices
* and returns its sysfs_device corresponding to it
dprintf("Error getting sysfs mount path\n");
return -1;
}
- if (sysfs_trailing_slash(path) == 0)
- strcat(path, "/");
+ strcat(path, "/");
strcat(path, SYSFS_BUS_NAME);
strcat(path, "/");
strcat(path, bus);
return NULL;
}
- memset(path, 0, SYSFS_NAME_LEN);
+ memset(path, 0, SYSFS_PATH_MAX);
if ((get_driver_path(bus, drv, path, SYSFS_PATH_MAX)) != 0) {
dprintf("Error getting to driver %s\n", drv);
return NULL;
return attribute;
}
+/**
+ * sysfs_open_driver: open driver by name, given its bus
+ * @drv_name: Name of the driver
+ * @bus_name: Name of the bus
+ * Returns the sysfs_driver reference on success and NULL on failure
+ */
+struct sysfs_driver *sysfs_open_driver(const unsigned char *drv_name,
+ const unsigned char *bus_name)
+{
+ unsigned char path[SYSFS_PATH_MAX];
+ struct sysfs_driver *driver = NULL;
+
+ if (drv_name == NULL || bus_name == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ memset(path, 0, SYSFS_PATH_MAX);
+ if ((get_driver_path(bus_name, drv_name, path, SYSFS_PATH_MAX)) != 0) {
+ dprintf("Error getting to driver %s\n", drv_name);
+ return NULL;
+ }
+ driver = sysfs_open_driver_path(path);
+ if (driver == NULL) {
+ dprintf("Error opening driver at %s\n", path);
+ return NULL;
+ }
+ return driver;
+}
+
~ianmdlvl / elogind.git / blobdiff