/*
- * syfs_dir.c
+ * sysfs_dir.c
*
* Directory utility functions for libsysfs
*
sysfs_close_attribute(sysattr);
return NULL;
}
- strncpy(sysattr->path, path, sizeof(sysattr->path));
+ strncpy(sysattr->path, path, SYSFS_PATH_MAX);
if ((stat(sysattr->path, &fileinfo)) != 0) {
dprintf("Stat failed: No such attribute?\n");
sysattr->method = 0;
return -1;
}
if ((strncmp(sysattr->value, new_value, sysattr->len)) == 0) {
- dprintf("Attribute %s already has the requested value %s\n",
+ dprintf("Attr %s already has the requested value %s\n",
sysattr->name, new_value);
return 0;
}
{
unsigned char *fbuf = NULL;
unsigned char *vbuf = NULL;
- size_t length = 0;
+ ssize_t length = 0;
long pgsize = 0;
int fd;
sysattr->path);
return -1;
}
-#ifdef __KLIBC__
- pgsize = 0x4000;
-#else
- pgsize = sysconf(_SC_PAGESIZE);
-#endif
+
+ pgsize = getpagesize();
fbuf = (unsigned char *)calloc(1, pgsize+1);
if (fbuf == NULL) {
dprintf("calloc failed\n");
return -1;
}
if (sysdir->subdirs == NULL)
- if ((sysfs_read_dir_subdirs(sysdir) != 0)
- || sysdir->subdirs == NULL)
+ if ((sysfs_read_dir_subdirs(sysdir)) != 0)
return 0;
- dlist_for_each_data(sysdir->subdirs, cursub, struct sysfs_directory) {
- if ((sysfs_read_directory(cursub)) != 0)
- dprintf ("Error reading subdirectory %s\n",
- cursub->name);
+ if (sysdir->subdirs != NULL) {
+ dlist_for_each_data(sysdir->subdirs, cursub,
+ struct sysfs_directory) {
+ if ((sysfs_read_dir_subdirs(cursub)) != 0)
+ dprintf ("Error reading subdirectory %s\n",
+ cursub->name);
+ }
}
return 0;
}
errno = EINVAL;
return NULL;
}
+
+ if (sysfs_path_is_dir(path) != 0) {
+ dprintf("Invalid path directory %s\n", path);
+ errno = EINVAL;
+ return NULL;
+ }
+
sdir = alloc_directory();
if (sdir == NULL) {
dprintf("Error allocating directory %s\n", path);
sysfs_close_directory(sdir);
return NULL;
}
- strncpy(sdir->path, path, sizeof(sdir->path));
+ strncpy(sdir->path, path, SYSFS_PATH_MAX);
return sdir;
}
return ln;
}
-/**
- * sysfs_refresh_attributes: Refresh attributes list
- * @attrlist: list of attributes to refresh
- * Returns 0 on success, 1 on failure
- */
-int sysfs_refresh_attributes(struct dlist *attrlist)
-{
- struct sysfs_attribute *attr = NULL;
-
- if (attrlist == NULL) {
- errno = EINVAL;
- return 1;
- }
- dlist_for_each_data(attrlist, attr, struct sysfs_attribute) {
- if (attr->method & SYSFS_METHOD_SHOW) {
- if ((sysfs_read_attribute(attr)) != 0) {
- dprintf("Error reading attribute %s\n", attr->path);
- if ((sysfs_path_is_file(attr->path)) != 0) {
- dprintf("Attr %s no longer exists\n",
- attr->name);
- }
- }
- } else {
- if ((sysfs_path_is_file(attr->path)) != 0) {
- dprintf("Attr %s no longer exists\n",
- attr->name);
- }
- }
- }
- if (attrlist->count == 0) {
- dprintf("No attributes in the list, destroying list now\n");
- dlist_destroy(attrlist);
- attrlist = NULL;
- return 1;
- }
- return 0;
-}
-
/**
* add_attribute: open and add attribute at path to given directory
* @sysdir: directory to add attribute to
{
DIR *dir = NULL;
struct dirent *dirent = NULL;
- struct stat astats;
unsigned char file_path[SYSFS_PATH_MAX];
int retval = 0;
if (0 == strcmp(dirent->d_name, ".."))
continue;
memset(file_path, 0, SYSFS_PATH_MAX);
- strncpy(file_path, sysdir->path, sizeof(file_path));
- strncat(file_path, "/", sizeof(file_path));
- strncat(file_path, dirent->d_name, sizeof(file_path));
- if ((lstat(file_path, &astats)) != 0) {
- dprintf("stat failed\n");
- continue;
- }
- if (S_ISREG(astats.st_mode))
+ 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);
{
DIR *dir = NULL;
struct dirent *dirent = NULL;
- struct stat astats;
unsigned char file_path[SYSFS_PATH_MAX];
int retval = 0;
if (0 == strcmp(dirent->d_name, ".."))
continue;
memset(file_path, 0, SYSFS_PATH_MAX);
- strncpy(file_path, sysdir->path, sizeof(file_path));
- strncat(file_path, "/", sizeof(file_path));
- strncat(file_path, dirent->d_name, sizeof(file_path));
- if ((lstat(file_path, &astats)) != 0) {
- dprintf("stat failed\n");
- continue;
- }
- if (S_ISLNK(astats.st_mode)) {
+ 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;
{
DIR *dir = NULL;
struct dirent *dirent = NULL;
- struct stat astats;
unsigned char file_path[SYSFS_PATH_MAX];
int retval = 0;
if (0 == strcmp(dirent->d_name, ".."))
continue;
memset(file_path, 0, SYSFS_PATH_MAX);
- strncpy(file_path, sysdir->path, sizeof(file_path));
- strncat(file_path, "/", sizeof(file_path));
- strncat(file_path, dirent->d_name, sizeof(file_path));
- if ((lstat(file_path, &astats)) != 0) {
- dprintf("stat failed\n");
- continue;
- }
- if (S_ISDIR(astats.st_mode))
+ 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);
if (0 == strcmp(dirent->d_name, ".."))
continue;
memset(file_path, 0, SYSFS_PATH_MAX);
- strncpy(file_path, sysdir->path, sizeof(file_path));
- strncat(file_path, "/", sizeof(file_path));
- strncat(file_path, dirent->d_name, sizeof(file_path));
+ strncpy(file_path, sysdir->path, SYSFS_PATH_MAX);
+ strcat(file_path, "/");
+ strcat(file_path, dirent->d_name);
if ((lstat(file_path, &astats)) != 0) {
dprintf("stat failed\n");
continue;
return(retval);
}
+/**
+ * sysfs_refresh_dir_attributes: Refresh attributes list
+ * @sysdir: directory whose list of attributes to refresh
+ * Returns 0 on success, 1 on failure
+ */
+int sysfs_refresh_dir_attributes(struct sysfs_directory *sysdir)
+{
+ if (sysdir == NULL) {
+ errno = EINVAL;
+ return 1;
+ }
+ if ((sysfs_path_is_dir(sysdir->path)) != 0) {
+ dprintf("Invalid path to directory %s\n", sysdir->path);
+ errno = EINVAL;
+ return 1;
+ }
+ if (sysdir->attributes != NULL) {
+ dlist_destroy(sysdir->attributes);
+ sysdir->attributes = NULL;
+ }
+ if ((sysfs_read_dir_attributes(sysdir)) != 0) {
+ dprintf("Error refreshing attributes for directory %s\n",
+ sysdir->path);
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * sysfs_refresh_dir_links: Refresh links list
+ * @sysdir: directory whose list of links to refresh
+ * Returns 0 on success, 1 on failure
+ */
+int sysfs_refresh_dir_links(struct sysfs_directory *sysdir)
+{
+ if (sysdir == NULL) {
+ errno = EINVAL;
+ return 1;
+ }
+ if ((sysfs_path_is_dir(sysdir->path)) != 0) {
+ dprintf("Invalid path to directory %s\n", sysdir->path);
+ errno = EINVAL;
+ return 1;
+ }
+ if (sysdir->links != NULL) {
+ dlist_destroy(sysdir->links);
+ sysdir->links = NULL;
+ }
+ if ((sysfs_read_dir_links(sysdir)) != 0) {
+ dprintf("Error refreshing links for directory %s\n",
+ sysdir->path);
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * sysfs_refresh_dir_subdirs: Refresh subdirs list
+ * @sysdir: directory whose list of subdirs to refresh
+ * Returns 0 on success, 1 on failure
+ */
+int sysfs_refresh_dir_subdirs(struct sysfs_directory *sysdir)
+{
+ if (sysdir == NULL) {
+ errno = EINVAL;
+ return 1;
+ }
+ if ((sysfs_path_is_dir(sysdir->path)) != 0) {
+ dprintf("Invalid path to directory %s\n", sysdir->path);
+ errno = EINVAL;
+ return 1;
+ }
+ if (sysdir->subdirs != NULL) {
+ dlist_destroy(sysdir->subdirs);
+ sysdir->subdirs = NULL;
+ }
+ if ((sysfs_read_dir_subdirs(sysdir)) != 0) {
+ dprintf("Error refreshing subdirs for directory %s\n",
+ sysdir->path);
+ return 1;
+ }
+ return 0;
+}
+
/**
* sysfs_get_directory_attribute: retrieves attribute attrname from current
* directory only
attr = (struct sysfs_attribute *)dlist_find_custom
(dir->attributes, attrname, dir_attribute_name_equal);
if (attr != NULL) {
- /*
- * don't read here since we would have read the attribute in
- * in the routine that called this routine
- */
- return attr;
+ if ((sysfs_read_attribute(attr)) != 0) {
+ dprintf("Error reading attribute %s\n", attr->name);
+ return NULL;
+ }
} else {
memset(new_path, 0, SYSFS_PATH_MAX);
strcpy(new_path, dir->path);
strcat(new_path, "/");
strcat(new_path, attrname);
if ((sysfs_path_is_file(new_path)) == 0) {
- if ((add_attribute(dir, new_path)) == 0) {
- attr = (struct sysfs_attribute *)dlist_find_custom
- (dir->attributes, attrname, dir_attribute_name_equal);
+ if ((add_attribute(dir, new_path)) == 0) {
+ attr = (struct sysfs_attribute *)
+ dlist_find_custom(dir->attributes,
+ attrname, dir_attribute_name_equal);
}
- return attr;
}
}
- return NULL;
+
+ return attr;
}
/**
errno = EINVAL;
return NULL;
}
- if (dir->links == NULL)
+ if (dir->links == NULL) {
if ((sysfs_read_dir_links(dir) != 0) || (dir->links == NULL))
return NULL;
+ } else {
+ if ((sysfs_refresh_dir_links(dir)) != 0)
+ return NULL;
+ }
return (struct sysfs_link *)dlist_find_custom(dir->links,
linkname, dir_link_name_equal);
}
return NULL;
}
+
+/**
+ * sysfs_get_dir_attributes: returns dlist of directory attributes
+ * @dir: directory to retrieve attributes from
+ * returns dlist of attributes or NULL
+ */
+struct dlist *sysfs_get_dir_attributes(struct sysfs_directory *dir)
+{
+ if (dir == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ if (dir->attributes == NULL) {
+ if (sysfs_read_dir_attributes(dir) != 0)
+ return NULL;
+ }
+
+ return (dir->attributes);
+}
+
+/**
+ * sysfs_get_dir_links: returns dlist of directory links
+ * @dir: directory to return links for
+ * returns dlist of links or NULL
+ */
+struct dlist *sysfs_get_dir_links(struct sysfs_directory *dir)
+{
+ if (dir == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ if (dir->links == NULL) {
+ if (sysfs_read_dir_links(dir) != 0)
+ return NULL;
+ }
+
+ return (dir->links);
+}
+
+/**
+ * sysfs_get_dir_subdirs: returns dlist of directory subdirectories
+ * @dir: directory to return subdirs for
+ * returns dlist of subdirs or NULL
+ */
+struct dlist *sysfs_get_dir_subdirs(struct sysfs_directory *dir)
+{
+ if (dir == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ if (dir->subdirs == NULL) {
+ if (sysfs_read_dir_subdirs(dir) != 0)
+ return NULL;
+ }
+
+ return (dir->subdirs);
+}
~ianmdlvl / elogind.git / blobdiff