/**
* sysfs_get_class_device: get specific class device using the device's id
* @cls: sysfs_class to find the device on
* @name: name of the class device to look for
*
* Returns sysfs_class_device * on success and NULL on failure
*/
struct sysfs_class_device *sysfs_get_class_device(struct sysfs_class *cls,
const char *name)
{
char path[SYSFS_PATH_MAX];
struct sysfs_class_device *cdev = NULL;
if (!cls || !name) {
errno = EINVAL;
return NULL;
}
if (cls->devices) {
cdev = (struct sysfs_class_device *)dlist_find_custom
(cls->devices, (void *)name, cdev_name_equal);
if (cdev)
return cdev;
}
safestrcpy(path, cls->path);
safestrcat(path, "/");
safestrcat(path, name);
cdev = sysfs_open_class_device_path(path);
if (!cdev) {
dprintf("Error opening class device at %s\n", path);
return NULL;
}
if (!cls->devices)
cls->devices = dlist_new_with_delete
(sizeof(struct sysfs_class_device),
sysfs_close_cls_dev);
dlist_unshift_sorted(cls->devices, cdev, sort_list);
return cdev;
}
/**
* Add class devices to list
*/
static void add_cdevs_to_classlist(struct sysfs_class *cls, struct dlist *list)
{
char path[SYSFS_PATH_MAX], *cdev_name;
struct sysfs_class_device *cdev = NULL;
if (cls == NULL || list == NULL)
return;
dlist_for_each_data(list, cdev_name, char) {
if (cls->devices) {
cdev = (struct sysfs_class_device *)
dlist_find_custom(cls->devices,
(void *)cdev_name, cdev_name_equal);
if (cdev)
continue;
}
safestrcpy(path, cls->path);
safestrcat(path, "/");
safestrcat(path, cdev_name);
cdev = sysfs_open_class_device_path(path);
if (cdev) {
if (!cls->devices)
cls->devices = dlist_new_with_delete
(sizeof(struct sysfs_class_device),
sysfs_close_cls_dev);
dlist_unshift_sorted(cls->devices, cdev,
sort_list);
}
}
}
/**
* read_dir_subdirs: grabs subdirs in a specific directory
* @sysdir: sysfs directory to read
* returns list of directory names with success and NULL with error.
*/
struct sysfs_device *sysfs_read_dir_subdirs(const char *path)
{
DIR *dir = NULL;
struct dirent *dirent = NULL;
char file_path[SYSFS_PATH_MAX];
struct sysfs_device *dev = NULL;
if (!path) {
errno = EINVAL;
return NULL;
}
dev = sysfs_open_device_path(path);
dir = opendir(path);
if (!dir) {
dprintf("Error opening directory %s\n", path);
return NULL;
}
while ((dirent = readdir(dir)) != NULL) {
if (0 == strcmp(dirent->d_name, "."))
continue;
if (0 == strcmp(dirent->d_name, ".."))
continue;
memset(file_path, 0, SYSFS_PATH_MAX);
safestrcpy(file_path, path);
safestrcat(file_path, "/");
safestrcat(file_path, dirent->d_name);
if (!sysfs_path_is_dir(file_path))
add_subdirectory(dev, file_path);
}
closedir(dir);
return dev;
}
/**
* sysfs_get_bus_driver: Get specific driver on bus using driver name
* @bus: bus to find driver on
* @drvname: name of driver
* returns struct sysfs_driver reference or NULL if not found.
*/
struct sysfs_driver *sysfs_get_bus_driver(struct sysfs_bus *bus,
const char *drvname)
{
struct sysfs_driver *drv;
char drvpath[SYSFS_PATH_MAX];
if (!bus || !drvname) {
errno = EINVAL;
return NULL;
}
if (bus->drivers) {
drv = (struct sysfs_driver *)dlist_find_custom
(bus->drivers, (void *)drvname, name_equal);
if (drv)
return drv;
}
safestrcpy(drvpath, bus->path);
safestrcat(drvpath, "/");
safestrcat(drvpath, SYSFS_DRIVERS_NAME);
safestrcat(drvpath, "/");
safestrcat(drvpath, drvname);
drv = sysfs_open_driver_path(drvpath);
if (!drv) {
dprintf("Error opening driver at %s\n", drvpath);
return NULL;
}
if (!bus->drivers)
bus->drivers = dlist_new_with_delete
(sizeof(struct sysfs_driver),
sysfs_close_drv);
dlist_unshift_sorted(bus->drivers, drv, sort_list);
return drv;
}
/**
* sysfs_get_bus_devices: gets all devices for bus
* @bus: bus to get devices for
* returns dlist of devices with success and NULL with failure
*/
struct dlist *sysfs_get_bus_devices(struct sysfs_bus *bus)
{
struct sysfs_device *dev;
struct dlist *linklist;
char path[SYSFS_PATH_MAX], devpath[SYSFS_PATH_MAX];
char target[SYSFS_PATH_MAX];
char *curlink;
if (!bus) {
errno = EINVAL;
return NULL;
}
memset(path, 0, SYSFS_PATH_MAX);
safestrcpy(path, bus->path);
safestrcat(path, "/");
safestrcat(path, SYSFS_DEVICES_NAME);
linklist = read_dir_links(path);
if (linklist) {
dlist_for_each_data(linklist, curlink, char) {
if (bus->devices) {
dev = (struct sysfs_device *)
dlist_find_custom(bus->devices,
(void *)curlink, name_equal);
if (dev)
continue;
}
safestrcpy(devpath, path);
safestrcat(devpath, "/");
safestrcat(devpath, curlink);
if (sysfs_get_link(devpath, target, SYSFS_PATH_MAX)) {
dprintf("Error getting link - %s\n", devpath);
continue;
}
dev = sysfs_open_device_path(target);
if (!dev) {
dprintf("Error opening device at %s\n",
target);
continue;
}
if (!bus->devices)
bus->devices = dlist_new_with_delete
(sizeof(struct sysfs_device),
sysfs_close_dev);
dlist_unshift_sorted(bus->devices, dev, sort_list);
}
sysfs_close_list(linklist);
}
return (bus->devices);
}
/**
* sysfs_open_class: opens specific class and all its devices on system
* returns sysfs_class structure with success or NULL with error.
*/
struct sysfs_class *sysfs_open_class(const char *name)
{
struct sysfs_class *cls = NULL;
char *c, classpath[SYSFS_PATH_MAX];
if (!name) {
errno = EINVAL;
return NULL;
}
memset(classpath, 0, SYSFS_PATH_MAX);
if ((sysfs_get_mnt_path(classpath, SYSFS_PATH_MAX)) != 0) {
dprintf("Sysfs not supported on this system\n");
return NULL;
}
safestrcat(classpath, "/");
if (strcmp(name, SYSFS_BLOCK_NAME) == 0) {
safestrcat(classpath, SYSFS_BLOCK_NAME);
if (!sysfs_path_is_dir(classpath))
goto done;
c = strrchr(classpath, '/');
*(c+1) = '\0';
}
safestrcat(classpath, SYSFS_CLASS_NAME);
safestrcat(classpath, "/");
safestrcat(classpath, name);
done:
if (sysfs_path_is_dir(classpath)) {
dprintf("Class %s not found on the system\n", name);
return NULL;
}
cls = alloc_class();
if (cls == NULL) {
dprintf("calloc failed\n");
return NULL;
}
safestrcpy(cls->name, name);
safestrcpy(cls->path, classpath);
if ((sysfs_remove_trailing_slash(cls->path)) != 0) {
dprintf("Invalid path to class device %s\n", cls->path);
sysfs_close_class(cls);
return NULL;
}
return cls;
}
/**
* sysfs_get_bus_drivers: gets all drivers for bus
* @bus: bus to get devices for
* returns dlist of devices with success and NULL with failure
*/
struct dlist *sysfs_get_bus_drivers(struct sysfs_bus *bus)
{
struct sysfs_driver *drv;
struct dlist *dirlist;
char path[SYSFS_PATH_MAX], drvpath[SYSFS_PATH_MAX];
char *curdir;
if (!bus) {
errno = EINVAL;
return NULL;
}
memset(path, 0, SYSFS_PATH_MAX);
safestrcpy(path, bus->path);
safestrcat(path, "/");
safestrcat(path, SYSFS_DRIVERS_NAME);
dirlist = read_dir_subdirs(path);
if (dirlist) {
dlist_for_each_data(dirlist, curdir, char) {
if (bus->drivers) {
drv = (struct sysfs_driver *)
dlist_find_custom(bus->drivers,
(void *)curdir, name_equal);
if (drv)
continue;
}
safestrcpy(drvpath, path);
safestrcat(drvpath, "/");
safestrcat(drvpath, curdir);
drv = sysfs_open_driver_path(drvpath);
if (!drv) {
dprintf("Error opening driver at %s\n",
drvpath);
continue;
}
if (!bus->drivers)
bus->drivers = dlist_new_with_delete
(sizeof(struct sysfs_driver),
sysfs_close_drv);
dlist_unshift_sorted(bus->drivers, drv, sort_list);
}
sysfs_close_list(dirlist);
}
return (bus->drivers);
}
/**
* get_dev_attributes_list: build a list of attributes for the given device
* @dev: devices whose attributes list is required
* returns dlist of attributes on success and NULL on failure
*/
struct dlist *get_dev_attributes_list(void *dev)
{
DIR *dir = NULL;
struct dirent *dirent = NULL;
struct sysfs_attribute *attr = NULL;
char file_path[SYSFS_PATH_MAX], path[SYSFS_PATH_MAX];
if (!dev) {
errno = EINVAL;
return NULL;
}
memset(path, 0, SYSFS_PATH_MAX);
safestrcpy(path, ((struct sysfs_device *)dev)->path);
dir = opendir(path);
if (!dir) {
dprintf("Error opening directory %s\n", path);
return NULL;
}
while ((dirent = readdir(dir)) != NULL) {
if (0 == strcmp(dirent->d_name, "."))
continue;
if (0 == strcmp(dirent->d_name, ".."))
continue;
memset(file_path, 0, SYSFS_PATH_MAX);
safestrcpy(file_path, path);
safestrcat(file_path, "/");
safestrcat(file_path, dirent->d_name);
if (!sysfs_path_is_file(file_path)) {
if (((struct sysfs_device *)dev)->attrlist) {
/* check if attr is already in the list */
attr = (struct sysfs_attribute *)
dlist_find_custom
((((struct sysfs_device *)dev)->attrlist),
(void *)dirent->d_name, attr_name_equal);
if (attr)
continue;
else
add_attribute(dev, file_path);
} else
attr = add_attribute(dev, file_path);
}
}
closedir(dir);
return ((struct sysfs_device *)dev)->attrlist;
}
/**
* read_dir_subdirs: grabs subdirs in a specific directory
* @sysdir: sysfs directory to read
* returns list of directory names with success and NULL with error.
*/
struct dlist *read_dir_subdirs(const char *path)
{
DIR *dir = NULL;
struct dirent *dirent = NULL;
char file_path[SYSFS_PATH_MAX], *dir_name;
struct dlist *dirlist = NULL;
if (!path) {
errno = EINVAL;
return NULL;
}
dir = opendir(path);
if (!dir) {
dprintf("Error opening directory %s\n", path);
return NULL;
}
while ((dirent = readdir(dir)) != NULL) {
if (0 == strcmp(dirent->d_name, "."))
continue;
if (0 == strcmp(dirent->d_name, ".."))
continue;
memset(file_path, 0, SYSFS_PATH_MAX);
safestrcpy(file_path, path);
safestrcat(file_path, "/");
safestrcat(file_path, dirent->d_name);
if (!sysfs_path_is_dir(file_path)) {
if (!dirlist) {
dirlist = dlist_new_with_delete
(SYSFS_NAME_LEN, sysfs_del_name);
if (!dirlist) {
dprintf("Error creating list\n");
return NULL;
}
}
dir_name = (char *)calloc(1, SYSFS_NAME_LEN);
safestrcpymax(dir_name, dirent->d_name, SYSFS_NAME_LEN);
dlist_unshift_sorted(dirlist, dir_name, sort_char);
}
}
closedir(dir);
return dirlist;
}
/**
* sysfs_get_driver_module: gets the module being used by this driver
* @drv: sysfs_driver whose "module" is needed
* Returns sysfs_module on success and NULL on failure
*/
struct sysfs_module *sysfs_get_driver_module(struct sysfs_driver *drv)
{
char path[SYSFS_PATH_MAX], mod_path[SYSFS_PATH_MAX];
if (!drv) {
errno = EINVAL;
return NULL;
}
memset(path, 0, SYSFS_PATH_MAX);
safestrcpy(path, drv->path);
safestrcat(path, "/");
safestrcat(path, SYSFS_MODULE_NAME);
if (!sysfs_path_is_link(path)) {
memset(mod_path, 0, SYSFS_PATH_MAX);
if (!sysfs_get_link(path, mod_path, SYSFS_PATH_MAX))
drv->module = sysfs_open_module_path(mod_path);
}
return drv->module;
}
/* ###### Get textual description ######################################## */
void poolHandleGetDescription(const struct PoolHandle* poolHandle,
char* buffer,
const size_t bufferSize)
{
char result[8];
size_t i;
buffer[0] = 0x00;
for(i = 0;i < ((poolHandle->Size <= MAX_POOLHANDLESIZE) ? poolHandle->Size : MAX_POOLHANDLESIZE);i++) {
if(!iscntrl(poolHandle->Handle[i])) {
result[0] = poolHandle->Handle[i];
result[1] = 0x00;
safestrcat(buffer, result, bufferSize);
}
else {
snprintf((char*)&result, sizeof(result), "{%02x}", poolHandle->Handle[i]);
safestrcat(buffer, result, bufferSize);
}
}
}
/**
* get_attributes_list: build a list of attributes for the given path
* @path: grab attributes at the given path
* returns dlist of attributes on success and NULL on failure
*/
struct dlist *get_attributes_list(struct dlist *alist, const char *path)
{
DIR *dir = NULL;
struct dirent *dirent = NULL;
char file_path[SYSFS_PATH_MAX];
if (!path) {
errno = EINVAL;
return NULL;
}
dir = opendir(path);
if (!dir) {
dprintf("Error opening directory %s\n", path);
return NULL;
}
while ((dirent = readdir(dir)) != NULL) {
if (0 == strcmp(dirent->d_name, "."))
continue;
if (0 == strcmp(dirent->d_name, ".."))
continue;
memset(file_path, 0, SYSFS_PATH_MAX);
safestrcpy(file_path, path);
safestrcat(file_path, "/");
safestrcat(file_path, dirent->d_name);
if (!sysfs_path_is_file(file_path)) {
if (!alist) {
alist = dlist_new_with_delete
(sizeof(struct sysfs_attribute),
sysfs_del_attribute);
if (!alist) {
dprintf("Error creating list\n");
return NULL;
}
}
add_attribute_to_list(alist, file_path);
}
}
closedir(dir);
return alist;
}
/**
* sysfs_get_bus_device: Get specific device on bus using device's id
* @bus: bus to find device on
* @id: bus_id for device
* returns struct sysfs_device reference or NULL if not found.
*/
struct sysfs_device *sysfs_get_bus_device(struct sysfs_bus *bus,
const char *id)
{
struct sysfs_device *dev = NULL;
char devpath[SYSFS_PATH_MAX], target[SYSFS_PATH_MAX];
if (!bus || !id) {
errno = EINVAL;
return NULL;
}
if (bus->devices) {
dev = (struct sysfs_device *)dlist_find_custom
(bus->devices, (void *)id, name_equal);
if (dev)
return dev;
}
safestrcpy(devpath, bus->path);
safestrcat(devpath, "/");
safestrcat(devpath, SYSFS_DEVICES_NAME);
safestrcat(devpath, "/");
safestrcat(devpath, id);
if (sysfs_path_is_link(devpath)) {
dprintf("No such device %s on bus %s?\n", id, bus->name);
return NULL;
}
if (!sysfs_get_link(devpath, target, SYSFS_PATH_MAX)) {
dev = sysfs_open_device_path(target);
if (!dev) {
dprintf("Error opening device at %s\n", target);
return NULL;
}
if (!bus->devices)
bus->devices = dlist_new_with_delete
(sizeof(struct sysfs_device),
sysfs_close_dev);
dlist_unshift_sorted(bus->devices, dev, sort_list);
}
return dev;
}
/**
* sysfs_open_bus: opens specific bus and all its devices on system
* returns sysfs_bus structure with success or NULL with error.
*/
struct sysfs_bus *sysfs_open_bus(const char *name)
{
struct sysfs_bus *bus;
char buspath[SYSFS_PATH_MAX];
if (!name) {
errno = EINVAL;
return NULL;
}
memset(buspath, 0, SYSFS_PATH_MAX);
if (sysfs_get_mnt_path(buspath, SYSFS_PATH_MAX)) {
dprintf("Sysfs not supported on this system\n");
return NULL;
}
safestrcat(buspath, "/");
safestrcat(buspath, SYSFS_BUS_NAME);
safestrcat(buspath, "/");
safestrcat(buspath, name);
if (sysfs_path_is_dir(buspath)) {
dprintf("Invalid path to bus: %s\n", buspath);
return NULL;
}
bus = alloc_bus();
if (!bus) {
dprintf("calloc failed\n");
return NULL;
}
safestrcpy(bus->name, name);
safestrcpy(bus->path, buspath);
if (sysfs_remove_trailing_slash(bus->path)) {
dprintf("Incorrect path to bus %s\n", bus->path);
sysfs_close_bus(bus);
return NULL;
}
return bus;
}
/**
* sysfs_get_classdev_device: gets the sysfs_device associated with the
* given sysfs_class_device
* @clsdev: class device whose associated sysfs_device is needed
* returns struct sysfs_device * on success or NULL on error
*/
struct sysfs_device *sysfs_get_classdev_device
(struct sysfs_class_device *clsdev)
{
char linkpath[SYSFS_PATH_MAX], devpath[SYSFS_PATH_MAX];
if (!clsdev) {
errno = EINVAL;
return NULL;
}
if (clsdev->sysdevice)
return clsdev->sysdevice;
memset(linkpath, 0, SYSFS_PATH_MAX);
safestrcpy(linkpath, clsdev->path);
safestrcat(linkpath, "/device");
if (!sysfs_path_is_link(linkpath)) {
memset(devpath, 0, SYSFS_PATH_MAX);
if (!sysfs_get_link(linkpath, devpath, SYSFS_PATH_MAX))
clsdev->sysdevice = sysfs_open_device_path(devpath);
}
return clsdev->sysdevice;
}