diff options
Diffstat (limited to 'libsysfs')
| -rw-r--r-- | libsysfs/dlist.c | 2 | ||||
| -rw-r--r-- | libsysfs/sysfs.h | 2 | ||||
| -rw-r--r-- | libsysfs/sysfs/dlist.h | 1 | ||||
| -rw-r--r-- | libsysfs/sysfs/libsysfs.h | 15 | ||||
| -rw-r--r-- | libsysfs/sysfs_bus.c | 317 | ||||
| -rw-r--r-- | libsysfs/sysfs_class.c | 188 | ||||
| -rw-r--r-- | libsysfs/sysfs_device.c | 9 | ||||
| -rw-r--r-- | libsysfs/sysfs_dir.c | 8 | ||||
| -rw-r--r-- | libsysfs/sysfs_utils.c | 2 |
9 files changed, 530 insertions, 14 deletions
diff --git a/libsysfs/dlist.c b/libsysfs/dlist.c index c44e9d5ff5..5579602bbc 100644 --- a/libsysfs/dlist.c +++ b/libsysfs/dlist.c @@ -551,7 +551,7 @@ void dlist_sort_custom(struct dlist *list, int (*compare)(void *, void *)) struct dlist *templist; unsigned int passcount = 1; unsigned int mergecount = 1; - + dlist_start(list); templist = dlist_new(list->data_size); diff --git a/libsysfs/sysfs.h b/libsysfs/sysfs.h index 838427797d..2add8227a4 100644 --- a/libsysfs/sysfs.h +++ b/libsysfs/sysfs.h @@ -3,7 +3,7 @@ * * 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 diff --git a/libsysfs/sysfs/dlist.h b/libsysfs/sysfs/dlist.h index 62eaa9fec4..335a490a0a 100644 --- a/libsysfs/sysfs/dlist.h +++ b/libsysfs/sysfs/dlist.h @@ -50,6 +50,7 @@ * Just use the dlist_(insert|delete)_(before|after) macros if you do not want * to think about it. + */ #include <stddef.h> diff --git a/libsysfs/sysfs/libsysfs.h b/libsysfs/sysfs/libsysfs.h index 2f122405d7..12e7cc5f99 100644 --- a/libsysfs/sysfs/libsysfs.h +++ b/libsysfs/sysfs/libsysfs.h @@ -184,6 +184,21 @@ extern struct dlist *sysfs_get_classdev_attributes (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 diff --git a/libsysfs/sysfs_bus.c b/libsysfs/sysfs_bus.c new file mode 100644 index 0000000000..921ef32094 --- /dev/null +++ b/libsysfs/sysfs_bus.c @@ -0,0 +1,317 @@ +/* + * 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; +} + diff --git a/libsysfs/sysfs_class.c b/libsysfs/sysfs_class.c index a93de573d4..edf751b124 100644 --- a/libsysfs/sysfs_class.c +++ b/libsysfs/sysfs_class.c @@ -40,6 +40,43 @@ void sysfs_close_class_device(struct sysfs_class_device *dev) } } +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. @@ -96,7 +133,7 @@ struct sysfs_class_device *sysfs_open_class_device_path(const char *path) 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; } @@ -113,7 +150,7 @@ struct sysfs_class_device *sysfs_open_class_device_path(const char *path) } 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; @@ -335,3 +372,150 @@ struct sysfs_device *sysfs_get_classdev_device } 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; +} + diff --git a/libsysfs/sysfs_device.c b/libsysfs/sysfs_device.c index 7087730d5f..d1c5b321f0 100644 --- a/libsysfs/sysfs_device.c +++ b/libsysfs/sysfs_device.c @@ -38,7 +38,6 @@ static int get_dev_driver(struct sysfs_device *dev) errno = EINVAL; return -1; } - memset(path, 0, SYSFS_PATH_MAX); memset(devpath, 0, SYSFS_PATH_MAX); safestrcpymax(path, dev->path, SYSFS_PATH_MAX); @@ -53,9 +52,9 @@ static int get_dev_driver(struct sysfs_device *dev) } /* - * 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); @@ -81,7 +80,7 @@ static int get_dev_driver(struct sysfs_device *dev) 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; @@ -149,7 +148,7 @@ int sysfs_get_device_bus(struct sysfs_device *dev) 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)) { diff --git a/libsysfs/sysfs_dir.c b/libsysfs/sysfs_dir.c index ac3936656c..7d98c669c6 100644 --- a/libsysfs/sysfs_dir.c +++ b/libsysfs/sysfs_dir.c @@ -338,7 +338,7 @@ struct sysfs_attribute *get_attribute(void *dev, const char *name) 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; } @@ -373,7 +373,7 @@ struct dlist *read_dir_links(const char *path) 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); @@ -421,7 +421,7 @@ struct dlist *read_dir_subdirs(const char *path) 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); @@ -471,7 +471,7 @@ struct dlist *get_attributes_list(void *dev) 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 *) diff --git a/libsysfs/sysfs_utils.c b/libsysfs/sysfs_utils.c index 210c2a086d..c5558a43a1 100644 --- a/libsysfs/sysfs_utils.c +++ b/libsysfs/sysfs_utils.c @@ -3,7 +3,7 @@ * * 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 |