struct dlist *templist;
unsigned int passcount = 1;
unsigned int mergecount = 1;
-
+
dlist_start(list);
templist = dlist_new(list->data_size);
*
* Internal Header Definitions for libsysfs
*
- * Copyright (C) IBM Corp. 2003
+ * Copyright (C) IBM Corp. 2003-2005
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* Just use the dlist_(insert|delete)_(before|after) macros if you do not want
* to think about it.
+
*/
#include <stddef.h>
(struct sysfs_class_device *clsdev);
extern struct sysfs_device *sysfs_get_classdev_device
(struct sysfs_class_device *clsdev);
+extern void sysfs_close_class(struct sysfs_class *cls);
+extern struct sysfs_class *sysfs_open_class(const char *name);
+extern struct sysfs_class_device *sysfs_get_class_device
+ (struct sysfs_class *cls, const char *name);
+extern struct dlist *sysfs_get_class_devices(struct sysfs_class *cls);
+
+/* generic sysfs bus access */
+extern void sysfs_close_bus(struct sysfs_bus *bus);
+extern struct sysfs_bus *sysfs_open_bus(const char *name);
+extern struct dlist *sysfs_get_bus_devices(struct sysfs_bus *bus);
+extern struct dlist *sysfs_get_bus_drivers(struct sysfs_bus *bus);
+extern struct sysfs_device *sysfs_get_bus_device
+ (struct sysfs_bus *bus, const char *id);
+extern struct sysfs_driver *sysfs_get_bus_driver
+ (struct sysfs_bus *bus, const char *drvname);
/**
* sort_list: sorter function to keep list elements sorted in alphabetical
--- /dev/null
+/*
+ * sysfs_bus.c
+ *
+ * Generic bus utility functions for libsysfs
+ *
+ * Copyright (C) IBM Corp. 2003-2005
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include "libsysfs.h"
+#include "sysfs.h"
+
+static void sysfs_close_dev(void *dev)
+{
+ sysfs_close_device((struct sysfs_device *)dev);
+}
+
+static void sysfs_close_drv(void *drv)
+{
+ sysfs_close_driver((struct sysfs_driver *)drv);
+}
+
+/*
+ * compares names.
+ * @a: name looked for
+ * @b: sysfs_device comparing being compared
+ * returns 1 if a==b->name or 0 not equal
+ */
+static int name_equal(void *a, void *b)
+{
+ if (!a || !b)
+ return 0;
+
+ if (strcmp(((char *)a), ((struct sysfs_device *)b)->name) == 0)
+ return 1;
+
+ return 0;
+}
+
+/**
+ * sysfs_close_bus: close single bus
+ * @bus: bus structure
+ */
+void sysfs_close_bus(struct sysfs_bus *bus)
+{
+ if (bus) {
+ if (bus->attrlist)
+ dlist_destroy(bus->attrlist);
+ if (bus->devices)
+ dlist_destroy(bus->devices);
+ if (bus->drivers)
+ dlist_destroy(bus->drivers);
+ free(bus);
+ }
+}
+
+/**
+ * alloc_bus: mallocs new bus structure
+ * returns sysfs_bus_bus struct or NULL
+ */
+static struct sysfs_bus *alloc_bus(void)
+{
+ return (struct sysfs_bus *)calloc(1, sizeof(struct sysfs_bus));
+}
+
+/**
+ * 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_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);
+}
+
+/**
+ * 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_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_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;
+}
+
}
}
+static void sysfs_close_cls_dev(void *dev)
+{
+ sysfs_close_class_device((struct sysfs_class_device *)dev);
+}
+
+/**
+ * sysfs_close_class: close the given class
+ * @cls: sysfs_class to close
+ */
+void sysfs_close_class(struct sysfs_class *cls)
+{
+ if (cls) {
+ if (cls->devices)
+ dlist_destroy(cls->devices);
+ if (cls->attrlist)
+ dlist_destroy(cls->attrlist);
+ free(cls);
+ }
+}
+
+static int cdev_name_equal(void *a, void *b)
+{
+ if (!a || !b)
+ return 0;
+
+ if (strncmp((char *)a, ((struct sysfs_class_device *)b)->name,
+ strlen((char *)a)) == 0)
+ return 1;
+
+ return 0;
+}
+
+static struct sysfs_class *alloc_class(void)
+{
+ return (struct sysfs_class *) calloc(1, sizeof(struct sysfs_class));
+}
+
/**
* alloc_class_device: mallocs and initializes new class device struct.
* returns sysfs_class_device or NULL.
errno = EINVAL;
return NULL;
}
- if ((sysfs_path_is_dir(path)) != 0) {
+ if (sysfs_path_is_dir(path)) {
dprintf("%s is not a valid path to a class device\n", path);
return NULL;
}
}
safestrcpy(cdev->path, path);
- if ((sysfs_remove_trailing_slash(cdev->path)) != 0) {
+ if (sysfs_remove_trailing_slash(cdev->path)) {
dprintf("Invalid path to class device %s\n", cdev->path);
sysfs_close_class_device(cdev);
return NULL;
}
return clsdev->sysdevice;
}
+
+/**
+ * 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 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;
+ }
+
+ /*
+ * We shall now treat "block" also as a class. Hence, check here
+ * if "name" is "block" and proceed accordingly
+ */
+ if (strcmp(name, SYSFS_BLOCK_NAME) == 0) {
+ safestrcat(classpath, "/");
+ safestrcat(classpath, SYSFS_BLOCK_NAME);
+ } else {
+ safestrcat(classpath, "/");
+ safestrcat(classpath, SYSFS_CLASS_NAME);
+ safestrcat(classpath, "/");
+ safestrcat(classpath, name);
+ }
+ 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_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);
+ if (!sysfs_path_is_dir(path)) {
+ 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;
+}
+
+/**
+ * sysfs_get_class_devices: get all class devices in the given class
+ * @cls: sysfs_class whose devices list is needed
+ *
+ * Returns a dlist of sysfs_class_device * on success and NULL on failure
+ */
+struct dlist *sysfs_get_class_devices(struct sysfs_class *cls)
+{
+ char path[SYSFS_PATH_MAX];
+ char *cdev_name;
+ struct sysfs_class_device *cdev = NULL;
+ struct dlist *dirlist;
+
+ if (!cls) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ safestrcpy(path, cls->path);
+ dirlist = read_dir_subdirs(path);
+ if (dirlist) {
+ dlist_for_each_data(dirlist, 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);
+ }
+ }
+ sysfs_close_list(dirlist);
+ }
+
+ return cls->devices;
+}
+
errno = EINVAL;
return -1;
}
-
memset(path, 0, SYSFS_PATH_MAX);
memset(devpath, 0, SYSFS_PATH_MAX);
safestrcpymax(path, dev->path, SYSFS_PATH_MAX);
}
/*
- * Devices on on earlier kernels do not have the "driver" link.
+ * Devices on earlier kernels do not have the "driver" link.
* Look it up in the bus directory.
- */
+ */
if (dev->bus[0] == '\0')
return -1;
memset(path, 0, SYSFS_PATH_MAX);
safestrcat(devpath, drv);
safestrcat(devpath, "/");
safestrcat(devpath, dev->bus_id);
- if (sysfs_path_is_link(devpath) == 0) {
+ if (!sysfs_path_is_link(devpath)) {
safestrcpy(dev->driver_name, drv);
sysfs_close_list(drvlist);
return 0;
safestrcat(path, SYSFS_DEVICES_NAME);
safestrcat(path, "/");
safestrcat(path, dev->bus_id);
- if ((sysfs_path_is_link(path)) == 0) {
+ if (!sysfs_path_is_link(path)) {
memset(target, 0, SYSFS_PATH_MAX);
if (sysfs_get_link(path, target,
SYSFS_PATH_MAX)) {
SYSFS_PATH_MAX);
safestrcatmax(path, "/", SYSFS_PATH_MAX);
safestrcatmax(path, name, SYSFS_PATH_MAX);
- if (!(sysfs_path_is_file(path)))
+ if (!sysfs_path_is_file(path))
cur = add_attribute((void *)dev, path);
return cur;
}
safestrcpy(file_path, path);
safestrcat(file_path, "/");
safestrcat(file_path, dirent->d_name);
- if ((sysfs_path_is_link(file_path)) == 0) {
+ if (!sysfs_path_is_link(file_path)) {
if (!linklist) {
linklist = dlist_new_with_delete
(SYSFS_NAME_LEN, sysfs_del_name);
safestrcpy(file_path, path);
safestrcat(file_path, "/");
safestrcat(file_path, dirent->d_name);
- if ((sysfs_path_is_dir(file_path)) == 0) {
+ if (!sysfs_path_is_dir(file_path)) {
if (!dirlist) {
dirlist = dlist_new_with_delete
(SYSFS_NAME_LEN, sysfs_del_name);
safestrcpy(file_path, path);
safestrcat(file_path, "/");
safestrcat(file_path, dirent->d_name);
- if ((sysfs_path_is_file(file_path)) == 0) {
+ 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 *)
*
* System utility functions for libsysfs
*
- * Copyright (C) IBM Corp. 2003
+ * Copyright (C) IBM Corp. 2003-2005
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
~ianmdlvl / elogind.git / commitdiff