Ananth released sysfsutils 0.4.0 last night, I'm sure you saw the email.
Here's a patch with the latest changes from the pre-patch I already
gave you. It includes sysfs_get_device_parent(), which you said you
needed. I've run your test scripts and I've built scsi_id. Please
play around with this and check it out.
There are quite a few changes. Please do not access
structure pointers, like sysfs_device's parent, directly like
dev->parent. Please use the "get" function to retrieve. The functions
load things on demand and refresh views under the covers.
char *dev;
dprintf("%s\n", devpath);
- class_dev = sysfs_open_class_device(devpath);
+ class_dev = sysfs_open_class_device_path(devpath);
if (!class_dev) {
log_message(LOG_WARNING, "open class %s failed: %s\n", devpath,
strerror(errno));
return 1;
}
- scsi_dev = sysfs_open_class_device(full_dev_path);
+ scsi_dev = sysfs_open_class_device_path(full_dev_path);
if (!scsi_dev) {
log_message(LOG_WARNING, "open class %s failed: %s\n",
full_dev_path, strerror(errno));
/* sysfs driver access */
extern void sysfs_close_driver(struct sysfs_driver *driver);
-extern struct sysfs_driver *sysfs_open_driver(const unsigned char *path);
+extern struct sysfs_driver *sysfs_open_driver
+ (const unsigned char *drv_name, const unsigned char *bus_name);
+extern struct sysfs_driver *sysfs_open_driver_path(const unsigned char *path);
extern struct sysfs_attribute *sysfs_get_driver_attr
(struct sysfs_driver *drv, const unsigned char *name);
extern struct dlist *sysfs_get_driver_attributes(struct sysfs_driver *driver);
(const unsigned char *name);
extern struct dlist *sysfs_get_root_devices(struct sysfs_root_device *root);
extern void sysfs_close_device(struct sysfs_device *dev);
-extern struct sysfs_device *sysfs_open_device(const unsigned char *path);
+extern struct sysfs_device *sysfs_open_device
+ (const unsigned char *bus_id, const unsigned char *bus);
+extern struct sysfs_device *sysfs_get_device_parent(struct sysfs_device *dev);
+extern struct sysfs_device *sysfs_open_device_path(const unsigned char *path);
extern struct sysfs_attribute *sysfs_get_device_attr
(struct sysfs_device *dev, const unsigned char *name);
extern struct dlist *sysfs_get_device_attributes(struct sysfs_device *device);
-extern struct sysfs_device *sysfs_open_device_by_id
- (const unsigned char *bus_id, const unsigned char *bus);
extern struct sysfs_attribute *sysfs_open_device_attr(const unsigned char *bus,
const unsigned char *bus_id, const unsigned char *attrib);
/* generic sysfs class access */
extern void sysfs_close_class_device(struct sysfs_class_device *dev);
-extern struct sysfs_class_device *sysfs_open_class_device
+extern struct sysfs_class_device *sysfs_open_class_device_path
(const unsigned char *path);
+extern struct sysfs_class_device *sysfs_open_class_device
+ (const unsigned char *class, const unsigned char *name);
extern struct sysfs_device *sysfs_get_classdev_device
(struct sysfs_class_device *clsdev);
extern struct sysfs_driver *sysfs_get_classdev_driver
extern struct dlist *sysfs_get_class_devices(struct sysfs_class *cls);
extern struct sysfs_class_device *sysfs_get_class_device
(struct sysfs_class *class, unsigned char *name);
-extern struct sysfs_class_device *sysfs_open_class_device_by_name
- (const unsigned char *class, const unsigned char *name);
extern struct dlist *sysfs_get_classdev_attributes
(struct sysfs_class_device *cdev);
extern struct sysfs_attribute *sysfs_get_classdev_attr
return NULL;
}
- dlist_for_each_data(devdir->links, curl, struct sysfs_link) {
- bdev = sysfs_open_device(curl->target);
- if (bdev == NULL) {
- dprintf("Error opening device at %s\n", curl->target);
- continue;
+ if (devdir->links != 0) {
+ dlist_for_each_data(devdir->links, curl, struct sysfs_link) {
+ bdev = sysfs_open_device_path(curl->target);
+ if (bdev == NULL) {
+ dprintf("Error opening device at %s\n",
+ curl->target);
+ continue;
+ }
+ if (bus->devices == NULL)
+ bus->devices = dlist_new_with_delete
+ (sizeof(struct sysfs_device),
+ sysfs_close_dev);
+ dlist_unshift(bus->devices, bdev);
}
- if (bus->devices == NULL)
- bus->devices = dlist_new_with_delete
- (sizeof(struct sysfs_device), sysfs_close_dev);
- dlist_unshift(bus->devices, bdev);
}
sysfs_close_directory(devdir);
sysfs_close_directory(drvdir);
return NULL;
}
- dlist_for_each_data(drvdir->subdirs, cursub, struct sysfs_directory) {
- driver = sysfs_open_driver(cursub->path);
- if (driver == NULL) {
- dprintf("Error opening driver at %s\n", cursub->path);
- continue;
+ if (drvdir->subdirs != NULL) {
+ dlist_for_each_data(drvdir->subdirs, cursub,
+ struct sysfs_directory) {
+ driver = sysfs_open_driver_path(cursub->path);
+ if (driver == NULL) {
+ dprintf("Error opening driver at %s\n",
+ cursub->path);
+ continue;
+ }
+ if (bus->drivers == NULL)
+ bus->drivers = dlist_new_with_delete
+ (sizeof(struct sysfs_driver),
+ sysfs_close_drv);
+ dlist_unshift(bus->drivers, driver);
}
- if (bus->drivers == NULL)
- bus->drivers = dlist_new_with_delete
- (sizeof(struct sysfs_driver), sysfs_close_drv);
- dlist_unshift(bus->drivers, driver);
}
sysfs_close_directory(drvdir);
return (bus->drivers);
dprintf("Error getting sysfs mount point\n");
return NULL;
}
-
+
if (sysfs_trailing_slash(path) == 0)
strcat(path, "/");
-
strcat(path, SYSFS_BUS_NAME);
strcat(path, "/");
strcat(path, busname);
strcat(path, "/");
strcat(path, dev_id);
- rdev = sysfs_open_device(path);
+ rdev = sysfs_open_device_path(path);
if (rdev == NULL) {
dprintf("Error getting device %s on bus %s\n",
dev_id, busname);
}
/**
- * sysfs_open_class_device: Opens and populates class device
+ * sysfs_open_class_device_path: Opens and populates class device
* @path: path to class device.
* returns struct sysfs_class_device with success and NULL with error.
*/
-struct sysfs_class_device *sysfs_open_class_device(const unsigned char *path)
+struct sysfs_class_device *sysfs_open_class_device_path
+ (const unsigned char *path)
{
struct sysfs_class_device *cdev = NULL;
return NULL;
}
- if ((sysfs_read_dir_subdirs(cls->directory) != 0)
- || cls->directory->subdirs == NULL)
+ if ((sysfs_read_dir_subdirs(cls->directory)) != 0)
return NULL;
- dlist_for_each_data(cls->directory->subdirs, cur,
- struct sysfs_directory) {
- dev = sysfs_open_class_device(cur->path);
- if (dev == NULL) {
- dprintf("Error opening device at %s\n", cur->path);
- continue;
- }
- if (cls->devices == NULL)
- cls->devices = dlist_new_with_delete
+ if (cls->directory->subdirs != NULL) {
+ dlist_for_each_data(cls->directory->subdirs, cur,
+ struct sysfs_directory) {
+ dev = sysfs_open_class_device_path(cur->path);
+ if (dev == NULL) {
+ dprintf("Error opening device at %s\n",
+ cur->path);
+ continue;
+ }
+ if (cls->devices == NULL)
+ cls->devices = dlist_new_with_delete
(sizeof(struct sysfs_class_device),
sysfs_close_cls_dev);
- dlist_unshift(cls->devices, dev);
+ dlist_unshift(cls->devices, dev);
+ }
}
return cls->devices;
}
dprintf("Sysfs not supported on this system\n");
return NULL;
}
-
if (sysfs_trailing_slash(classpath) == 0)
strcat(classpath, "/");
if (devlink == NULL)
return NULL;
- clsdev->sysdevice = sysfs_open_device(devlink->target);
+ clsdev->sysdevice = sysfs_open_device_path(devlink->target);
if (clsdev->sysdevice == NULL)
return NULL;
if (clsdev->driver != NULL)
}
drvlink = sysfs_get_directory_link(clsdev->directory, "driver");
if (drvlink != NULL) {
- clsdev->driver = sysfs_open_driver(drvlink->target);
+ clsdev->driver = sysfs_open_driver_path(drvlink->target);
if (clsdev->driver == NULL)
return NULL;
goto errout;
*c = '\0';
- clsdev->parent = sysfs_open_class_device(parent_path);
+ clsdev->parent = sysfs_open_class_device_path(parent_path);
if (clsdev->parent == NULL) {
dprintf("Error opening the parent class device at %s\n",
parent_path);
}
/**
- * sysfs_open_class_device_by_name: Locates a specific class_device and returns it.
+ * sysfs_open_class_device: Locates a specific class_device and returns it.
* Class_device must be closed using sysfs_close_class_device
* @classname: Class to search
* @name: name of the class_device
* NOTE:
* Call sysfs_close_class_device() to close the class device
*/
-struct sysfs_class_device *sysfs_open_class_device_by_name
+struct sysfs_class_device *sysfs_open_class_device
(const unsigned char *classname, const unsigned char *name)
{
unsigned char devpath[SYSFS_PATH_MAX];
return NULL;
}
- cdev = sysfs_open_class_device(devpath);
+ cdev = sysfs_open_class_device_path(devpath);
if (cdev == NULL) {
dprintf("Error getting class device %s from class %s\n",
name, classname);
errno = EINVAL;
return NULL;
}
+
/*
* First, see if it's in the current directory. Then look at
* subdirs since class devices can have subdirs of attributes.
*/
attrlist = sysfs_get_classdev_attributes(clsdev);
- if (attrlist == NULL)
- return NULL;
- cur = sysfs_get_directory_attribute(clsdev->directory,
+ if (attrlist != NULL) {
+ cur = sysfs_get_directory_attribute(clsdev->directory,
(unsigned char *)name);
- if (cur != NULL)
- return cur;
+ if (cur != NULL)
+ return cur;
+ }
if (clsdev->directory->subdirs == NULL)
if ((sysfs_read_dir_subdirs(clsdev->directory)) != 0 ||
clsdev->directory->subdirs == NULL)
return NULL;
- dlist_for_each_data(clsdev->directory->subdirs, sdir,
- struct sysfs_directory) {
- cur = sysfs_get_directory_attribute(sdir,
- (unsigned char *)name);
- if (cur != NULL)
- return cur;
+ if (clsdev->directory->subdirs != NULL) {
+ dlist_for_each_data(clsdev->directory->subdirs, sdir,
+ struct sysfs_directory) {
+ if ((sysfs_path_is_dir(sdir->path)) != 0)
+ continue;
+ if (sdir->attributes == NULL) {
+ cur = sysfs_get_directory_attribute(sdir,
+ (unsigned char *)name);
+ } else {
+ if ((sysfs_refresh_attributes
+ (sdir->attributes)) == 0)
+ cur = sysfs_get_directory_attribute(sdir,
+ (unsigned char *)name);
+ }
+ }
}
-
- return NULL;
+ return cur;
}
/**
}
return attribute;
}
+
}
}
-/**
- * sysfs_del_device: routine for dlist integration
- */
-static void sysfs_del_device(void *dev)
-{
- sysfs_close_device((struct sysfs_device *)dev);
-}
-
/**
* sysfs_close_dev_tree: routine for dlist integration
*/
void sysfs_close_device(struct sysfs_device *dev)
{
if (dev != NULL) {
+ if (dev->parent != NULL)
+ sysfs_close_device(dev->parent);
if (dev->directory != NULL)
sysfs_close_directory(dev->directory);
if (dev->children != NULL && dev->children->count == 0)
dprintf ("Device %s not supported on this system\n", path);
return NULL;
}
- if ((sysfs_read_directory(rdir)) != 0) {
+ if ((sysfs_read_dir_subdirs(rdir)) != 0) {
dprintf ("Error reading device at dir %s\n", path);
sysfs_close_directory(rdir);
return NULL;
}
/**
- * sysfs_open_device: opens and populates device structure
+ * sysfs_open_device_path: opens and populates device structure
* @path: path to device, this is the /sys/devices/ path
* returns sysfs_device structure with success or NULL with error
*/
-struct sysfs_device *sysfs_open_device(const unsigned char *path)
+struct sysfs_device *sysfs_open_device_path(const unsigned char *path)
{
struct sysfs_device *dev = NULL;
errno = EINVAL;
return NULL;
}
- rootdev = sysfs_open_device(path);
+ rootdev = sysfs_open_device_path(path);
if (rootdev == NULL) {
dprintf("Error opening root device at %s\n", path);
return NULL;
if (rootdev->children == NULL)
rootdev->children = dlist_new_with_delete
(sizeof(struct sysfs_device),
- sysfs_del_device);
+ sysfs_close_dev_tree);
dlist_unshift(rootdev->children, new);
}
}
if (sysfs_trailing_slash(rootpath) == 0)
strcat(rootpath, "/");
-
strcat(rootpath, SYSFS_DEVICES_NAME);
strcat(rootpath, "/");
strcat(rootpath, name);
dprintf("calloc failure\n");
return NULL;
}
+ strcpy(root->name, name);
strcpy(root->path, rootpath);
return root;
}
cur = sysfs_get_directory_attribute(dev->directory,
(unsigned char *)name);
- if (cur != NULL)
- return cur;
- return NULL;
+ return cur;
}
/**
dprintf ("Sysfs not supported on this system\n");
return -1;
}
-
if (sysfs_trailing_slash(bus_path) == 0)
strcat(bus_path, "/");
-
strcat(bus_path, SYSFS_BUS_NAME);
strcat(bus_path, "/");
strcat(bus_path, bus);
}
/**
- * sysfs_open_device_by_id: open a device by id (use the "bus" subsystem)
+ * sysfs_open_device: open a device by id (use the "bus" subsystem)
* @bus_id: bus_id of the device to open - has to be the "bus_id" in
* /sys/bus/xxx/devices
* @bus: bus the device belongs to
* 2. Bus the device is on must be supplied
* Use sysfs_find_device_bus to get the bus name
*/
-struct sysfs_device *sysfs_open_device_by_id(const unsigned char *bus_id,
+struct sysfs_device *sysfs_open_device(const unsigned char *bus_id,
const unsigned char *bus)
{
char sysfs_path[SYSFS_PATH_MAX];
return NULL;
}
- device = sysfs_open_device(sysfs_path);
+ device = sysfs_open_device_path(sysfs_path);
if (device == NULL) {
dprintf("Error opening device %s\n", bus_id);
return NULL;
return device;
}
+/**
+ * sysfs_get_device_parent: opens up given device's parent and returns a
+ * reference to its sysfs_device
+ * @dev: sysfs_device whose parent is requested
+ * Returns sysfs_device of the parent on success and NULL on failure
+ */
+struct sysfs_device *sysfs_get_device_parent(struct sysfs_device *dev)
+{
+ unsigned char ppath[SYSFS_PATH_MAX], *tmp = NULL;
+
+ if (dev == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ if (dev->parent != NULL)
+ return (dev->parent);
+
+ memset(ppath, 0, SYSFS_PATH_MAX);
+ strcpy(ppath, dev->path);
+ tmp = strrchr(ppath, '/');
+ if (tmp == NULL) {
+ dprintf("Invalid path to device %s\n", ppath);
+ return NULL;
+ }
+ if (*(tmp +1) == '\0') {
+ *tmp = '\0';
+ tmp = strrchr(tmp, '/');
+ if (tmp == NULL) {
+ dprintf("Invalid path to device %s\n", ppath);
+ return NULL;
+ }
+ }
+ *tmp = '\0';
+
+ /*
+ * All "devices" have the "detach_state" attribute - validate here
+ */
+ strcat(ppath, "/detach_state");
+ if ((sysfs_path_is_file(ppath)) != 0) {
+ dprintf("Device at %s does not have a parent\n", dev->path);
+ return NULL;
+ }
+ tmp = strrchr(ppath, '/');
+ *tmp = '\0';
+ dev->parent = sysfs_open_device_path(ppath);
+ if (dev->parent == NULL) {
+ dprintf("Error opening device %s's parent at %s\n",
+ dev->bus_id, ppath);
+ return NULL;
+ }
+ return (dev->parent);
+}
+
/*
* sysfs_open_device_attr: open the given device's attribute
* @bus: Bus on which to look
/*
- * 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;
{
unsigned char *fbuf = NULL;
unsigned char *vbuf = NULL;
- size_t length = 0;
+ ssize_t length = 0;
long pgsize = 0;
int fd;
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;
}
sysfs_close_directory(sdir);
return NULL;
}
- strncpy(sdir->path, path, sizeof(sdir->path));
+ strncpy(sdir->path, path, SYSFS_PATH_MAX);
return sdir;
}
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);
+ 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);
}
}
}
- if (attrlist->count == 0) {
- dprintf("No attributes in the list, destroying list now\n");
- dlist_destroy(attrlist);
- attrlist = NULL;
- return 1;
- }
return 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));
+ 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;
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;
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;
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;
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;
- } else {
+ if (attr == NULL) {
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);
+ attr = (struct sysfs_attribute *)
+ dlist_find_custom(dir->attributes,
+ attrname, dir_attribute_name_equal);
}
- return attr;
}
}
- return NULL;
+ return attr;
}
/**
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;
}
attrlist = sysfs_get_driver_attributes(drv);
- if (attrlist != NULL) {
+ if (attrlist != NULL)
cur = sysfs_get_directory_attribute(drv->directory,
(unsigned char *)name);
- if (cur != NULL)
- return cur;
- }
- return NULL;
+ return cur;
}
/**
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 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;
+}
+
/*
- * syfs_utils.c
+ * sysfs_utils.c
*
* System utility functions for libsysfs
*
}
memset(tmp, 0, SYSFS_PATH_MAX);
strcpy(tmp, path);
- n = &tmp[strlen(tmp)-1];
- if (strncmp(n, "/", 1) == 0)
- *n = '\0';
n = strrchr(tmp, '/');
if (n == NULL) {
errno = EINVAL;
return -1;
}
+ if (*(n+1) == '\0') {
+ *n = '\0';
+ n = strrchr(tmp, '/');
+ if (n == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+ }
n++;
strncpy(name, n, len);
-
return 0;
}
unsigned char *c = NULL;
struct sysfs_directory *dir = NULL, *cur = NULL;
struct dlist *list = NULL;
- struct stat astats;
if (name == NULL)
return NULL;
dprintf("Error getting sysfs mount point\n");
return NULL;
}
-
if (sysfs_trailing_slash(sysfs_path) == 0)
strcat(sysfs_path, "/");
strcat(sysfs_path, name);
return NULL;
}
- if (sysfs_read_directory(dir) != 0) {
+ if ((sysfs_read_dir_subdirs(dir)) != 0) {
dprintf("Error reading sysfs_directory at %s\n", sysfs_path);
sysfs_close_directory(dir);
return NULL;
if (c == NULL)
goto out;
strcpy(c, SYSFS_BLOCK_NAME);
- if ((lstat(sysfs_path, &astats)) != 0) {
- dprintf("stat() failed\n");
- goto out;
- }
- if (S_ISDIR(astats.st_mode)) {
+ if ((sysfs_path_is_dir(sysfs_path)) == 0) {
subsys_name = (char *)calloc(1, SYSFS_NAME_LEN);
strcpy(subsys_name, SYSFS_BLOCK_NAME);
dlist_unshift(list, subsys_name);
return NULL;
}
- if (sysfs_read_directory(dir) != 0) {
+ if ((sysfs_read_dir_links(dir)) != 0) {
dprintf("Error reading sysfs_directory at %s\n", sysfs_path);
sysfs_close_directory(dir);
return NULL;
dbg("looking at '%s'", dev_path);
/* open up the sysfs class device for this thing... */
- class_dev = sysfs_open_class_device(dev_path);
+ class_dev = sysfs_open_class_device_path(dev_path);
if (class_dev == NULL) {
- dbg ("sysfs_open_class_device failed");
+ dbg ("sysfs_open_class_device_path failed");
goto exit;
}
dbg("class_dev->name='%s'", class_dev->name);
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