+/**
+ * add_attribute: open and add attribute at path to given directory
+ * @sysdir: directory to add attribute to
+ * @path: path to attribute
+ * returns 0 with success and -1 with error.
+ */
+static int add_attribute(struct sysfs_directory *sysdir,
+ const unsigned char *path)
+{
+ struct sysfs_attribute *attr = NULL;
+
+ attr = sysfs_open_attribute(path);
+ if (attr == NULL) {
+ dprintf("Error opening attribute %s\n", path);
+ return -1;
+ }
+ if (attr->method & SYSFS_METHOD_SHOW) {
+ if ((sysfs_read_attribute(attr)) != 0) {
+ dprintf("Error reading attribute %s\n", path);
+ sysfs_close_attribute(attr);
+ return 0;
+ }
+ }
+
+ if (sysdir->attributes == NULL) {
+ sysdir->attributes = dlist_new_with_delete
+ (sizeof(struct sysfs_attribute), sysfs_del_attribute);
+ }
+ dlist_unshift(sysdir->attributes, attr);
+
+ return 0;
+}
+
+/**
+ * add_subdirectory: open and add subdirectory at path to given directory
+ * @sysdir: directory to add subdir to
+ * @path: path to subdirectory
+ * returns 0 with success and -1 with error.
+ */
+static int add_subdirectory(struct sysfs_directory *sysdir,
+ const unsigned char *path)
+{
+ struct sysfs_directory *subdir = NULL;
+
+ subdir = sysfs_open_directory(path);
+ if (subdir == NULL) {
+ dprintf("Error opening directory %s\n", path);
+ return -1;
+ }
+ if (sysdir->subdirs == NULL)
+ sysdir->subdirs = dlist_new_with_delete
+ (sizeof(struct sysfs_directory), sysfs_del_directory);
+ dlist_unshift(sysdir->subdirs, subdir);
+ return 0;
+}
+
+/**
+ * add_link: open and add link at path to given directory
+ * @sysdir: directory to add link to
+ * @path: path to link
+ * returns 0 with success and -1 with error.
+ */
+static int add_link(struct sysfs_directory *sysdir, const unsigned char *path)
+{
+ struct sysfs_link *ln = NULL;
+
+ ln = sysfs_open_link(path);
+ if (ln == NULL) {
+ dprintf("Error opening link %s\n", path);
+ return -1;
+ }
+ if (sysdir->links == NULL)
+ sysdir->links = dlist_new_with_delete
+ (sizeof(struct sysfs_link), sysfs_del_link);
+ dlist_unshift(sysdir->links, ln);
+ return 0;
+}
+
+/**
+ * sysfs_read_dir_attributes: grabs attributes for the given directory
+ * @sysdir: sysfs directory to open
+ * returns 0 with success and -1 with error.
+ */
+int sysfs_read_dir_attributes(struct sysfs_directory *sysdir)
+{
+ DIR *dir = NULL;
+ struct dirent *dirent = NULL;
+ unsigned char file_path[SYSFS_PATH_MAX];
+ int retval = 0;
+
+ if (sysdir == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+ dir = opendir(sysdir->path);
+ if (dir == NULL) {
+ dprintf("Error opening directory %s\n", sysdir->path);
+ return -1;
+ }
+ while(((dirent = readdir(dir)) != NULL) && retval == 0) {
+ if (0 == strcmp(dirent->d_name, "."))
+ continue;
+ if (0 == strcmp(dirent->d_name, ".."))
+ continue;
+ memset(file_path, 0, SYSFS_PATH_MAX);
+ strncpy(file_path, sysdir->path, SYSFS_PATH_MAX);
+ strcat(file_path, "/");
+ strcat(file_path, dirent->d_name);
+ if ((sysfs_path_is_file(file_path)) == 0)
+ retval = add_attribute(sysdir, file_path);
+ }
+ closedir(dir);
+ return(retval);
+}
+
+/**
+ * sysfs_read_dir_links: grabs links in a specific directory
+ * @sysdir: sysfs directory to read links
+ * returns 0 with success and -1 with error.
+ */
+int sysfs_read_dir_links(struct sysfs_directory *sysdir)
+{
+ DIR *dir = NULL;
+ struct dirent *dirent = NULL;
+ unsigned char file_path[SYSFS_PATH_MAX];
+ int retval = 0;
+
+ if (sysdir == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+ dir = opendir(sysdir->path);
+ if (dir == NULL) {
+ dprintf("Error opening directory %s\n", sysdir->path);
+ return -1;
+ }
+ while(((dirent = readdir(dir)) != NULL) && retval == 0) {
+ if (0 == strcmp(dirent->d_name, "."))
+ continue;
+ if (0 == strcmp(dirent->d_name, ".."))
+ continue;
+ memset(file_path, 0, SYSFS_PATH_MAX);
+ strncpy(file_path, sysdir->path, SYSFS_PATH_MAX);
+ strcat(file_path, "/");
+ strcat(file_path, dirent->d_name);
+ if ((sysfs_path_is_link(file_path)) == 0) {
+ retval = add_link(sysdir, file_path);
+ if (retval != 0)
+ break;
+ }
+ }
+ closedir(dir);
+ return(retval);
+}
+
+/**
+ * sysfs_read_dir_subdirs: grabs subdirs in a specific directory
+ * @sysdir: sysfs directory to read links
+ * returns 0 with success and -1 with error.
+ */
+int sysfs_read_dir_subdirs(struct sysfs_directory *sysdir)
+{
+ DIR *dir = NULL;
+ struct dirent *dirent = NULL;
+ unsigned char file_path[SYSFS_PATH_MAX];
+ int retval = 0;
+
+ if (sysdir == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+ dir = opendir(sysdir->path);
+ if (dir == NULL) {
+ dprintf("Error opening directory %s\n", sysdir->path);
+ return -1;
+ }
+ while(((dirent = readdir(dir)) != NULL) && retval == 0) {
+ if (0 == strcmp(dirent->d_name, "."))
+ continue;
+ if (0 == strcmp(dirent->d_name, ".."))
+ continue;
+ memset(file_path, 0, SYSFS_PATH_MAX);
+ strncpy(file_path, sysdir->path, SYSFS_PATH_MAX);
+ strcat(file_path, "/");
+ strcat(file_path, dirent->d_name);
+ if ((sysfs_path_is_dir(file_path)) == 0)
+ retval = add_subdirectory(sysdir, file_path);
+ }
+ closedir(dir);
+ return(retval);
+}
+