diff options
| -rw-r--r-- | udev/lib/Makefile.am | 3 | ||||
| -rw-r--r-- | udev/lib/libudev-device.c | 256 | ||||
| -rw-r--r-- | udev/lib/libudev-enumerate.c | 190 | ||||
| -rw-r--r-- | udev/lib/libudev-private.h | 2 | ||||
| -rw-r--r-- | udev/lib/libudev-utils.c | 53 | ||||
| -rw-r--r-- | udev/lib/libudev.c | 400 |
6 files changed, 504 insertions, 400 deletions
diff --git a/udev/lib/Makefile.am b/udev/lib/Makefile.am index 791191c643..2e5b81d4e4 100644 --- a/udev/lib/Makefile.am +++ b/udev/lib/Makefile.am @@ -21,6 +21,9 @@ include_HEADERS =\ libudev_la_SOURCES =\ libudev-private.h \ libudev.c \ + libudev-utils.c \ + libudev-device.c \ + libudev-enumerate.c \ ../list.h \ ../udev.h \ ../udev_utils.c \ diff --git a/udev/lib/libudev-device.c b/udev/lib/libudev-device.c new file mode 100644 index 0000000000..805eef9467 --- /dev/null +++ b/udev/lib/libudev-device.c @@ -0,0 +1,256 @@ +/* + * libudev - interface to udev device information + * + * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <stdio.h> +#include <stdlib.h> +#include <stddef.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <dirent.h> +#include <sys/stat.h> + +#include "libudev.h" +#include "libudev-private.h" +#include "../udev.h" + +static struct udev_device *device_init(struct udev *udev) +{ + struct udev_device *udev_device; + + udev_device = malloc(sizeof(struct udev_device)); + if (udev_device == NULL) + return NULL; + memset(udev_device, 0x00, sizeof(struct udev_device)); + udev_device->refcount = 1; + udev_device->udev = udev; + return udev_device; +} + +/** + * udev_device_new_from_devpath: + * @udev: udev library context + * @devpath: sys device path + * + * Create new udev device, and fill in information from the sysfs + * device and the udev database entry. The devpath must not contain + * the sysfs mount path, and must contain a leading '/'. + * + * The initial refcount is 1, and needs to be decremented to + * release the ressources of the udev device. + * + * Returns: a new udev device, or #NULL, if it does not exist + **/ +struct udev_device *udev_device_new_from_devpath(struct udev *udev, const char *devpath) +{ + char path[PATH_SIZE]; + struct stat statbuf; + struct udev_device *udev_device; + int err; + + strlcpy(path, udev_get_sys_path(udev), sizeof(path)); + strlcat(path, devpath, sizeof(path)); + if (stat(path, &statbuf) != 0) + return NULL; + if (!S_ISDIR(statbuf.st_mode)) + return NULL; + + udev_device = device_init(udev); + if (udev_device == NULL) + return NULL; + + udev_device->udevice = udev_device_init(NULL); + if (udev_device->udevice == NULL) { + free(udev_device); + return NULL; + } + log_info(udev, "device %p created\n", udev_device); + + strlcpy(path, devpath, sizeof(path)); + sysfs_resolve_link(path, sizeof(path)); + + err = udev_db_get_device(udev_device->udevice, path); + if (err >= 0) + log_info(udev, "device %p filled with udev database data\n", udev_device); + log_info(udev, "device %p filled with %s data\n", udev_device, udev_device_get_devpath(udev_device)); + return udev_device; +} + +/** + * udev_device_get_udev: + * + * Retrieve the udev library context the device was created with. + * + * Returns: the udev library context + **/ +struct udev *udev_device_get_udev(struct udev_device *udev_device) +{ + return udev_device->udev; +} + +/** + * udev_device_ref: + * @udev_device: udev device + * + * Take a reference of a udev device. + * + * Returns: the passed udev device + **/ +struct udev_device *udev_device_ref(struct udev_device *udev_device) +{ + udev_device->refcount++; + return udev_device; +} + +/** + * udev_device_unref: + * @udev_device: udev device + * + * Drop a reference of a udev device. If the refcount reaches zero, + * the ressources of the device will be released. + * + **/ +void udev_device_unref(struct udev_device *udev_device) +{ + udev_device->refcount--; + if (udev_device->refcount > 0) + return; + udev_device_cleanup(udev_device->udevice); + free(udev_device); +} + +/** + * udev_device_get_devpath: + * @udev_device: udev device + * + * Retrieve the sys path of the udev device. The path does not contain + * the sys mount point. + * + * Returns: the sys path of the udev device + **/ +const char *udev_device_get_devpath(struct udev_device *udev_device) +{ + return udev_device->udevice->dev->devpath; +} + +/** + * udev_device_get_devname: + * @udev_device: udev device + * + * Retrieve the device node file name belonging to the udev device. + * The path does not contain the device directory, and does not contain + * a leading '/'. + * + * Returns: the device node file name of the udev device, or #NULL if no device node exists + **/ +const char *udev_device_get_devname(struct udev_device *udev_device) +{ + if (udev_device->udevice->name[0] == '\0') + return NULL; + return udev_device->udevice->name; +} + +/** + * udev_device_get_subsystem: + * @udev_device: udev device + * + * Retrieve the subsystem string of the udev device. The string does not + * contain any "/". + * + * Returns: the subsystem name of the udev device, or #NULL if it can not be determined + **/ +const char *udev_device_get_subsystem(struct udev_device *udev_device) +{ + struct sysfs_device *dev = udev_device->udevice->dev; + if (dev->subsystem[0] != '\0') + return dev->subsystem; + if (util_get_sys_subsystem(udev_device->udev, dev->devpath, + dev->subsystem, sizeof(dev->subsystem)) < 2) + return NULL; + return dev->subsystem; +} + +/** + * udev_device_get_devlinks: + * @udev_device: udev device + * @cb: function to be called for every device link found + * @data: data to be passed to the function + * + * Retrieve the device links pointing to the device file of the + * udev device. For every device link, the passed function will be + * called with the device link string. If the function returns 1, + * remaning device links will be ignored. The device link path + * does not contain the device directory, and does not contain + * a leading '/'. + * + * Returns: the number of device links passed to the caller, or a negative value on error + **/ +int udev_device_get_devlinks(struct udev_device *udev_device, + int (*cb)(struct udev_device *udev_device, const char *value, void *data), + void *data) +{ + struct name_entry *name_loop; + int count = 0; + + list_for_each_entry(name_loop, &udev_device->udevice->symlink_list, node) { + count++; + if (cb(udev_device, name_loop->name, data) != 0) + break; + } + return count; +} + +/** + * udev_device_get_properties: + * @udev_device: udev device + * @cb: function to be called for every property found + * @data: data to be passed to the function + * + * Retrieve the property key/value pairs belonging to the + * udev device. For every key/value pair, the passed function will be + * called. If the function returns 1, remaning properties will be + * ignored. + * + * Returns: the number of properties passed to the caller, or a negative value on error + **/ +int udev_device_get_properties(struct udev_device *udev_device, + int (*cb)(struct udev_device *udev_device, const char *key, const char *value, void *data), + void *data) +{ + struct name_entry *name_loop; + int count = 0; + + list_for_each_entry(name_loop, &udev_device->udevice->env_list, node) { + char name[PATH_SIZE]; + char *val; + + strncpy(name, name_loop->name, PATH_SIZE); + name[PATH_SIZE-1] = '\0'; + val = strchr(name, '='); + if (val == NULL) + continue; + val[0] = '\0'; + val = &val[1]; + if (cb(udev_device, name, val, data) != 0) + break; + } + return count; +} diff --git a/udev/lib/libudev-enumerate.c b/udev/lib/libudev-enumerate.c new file mode 100644 index 0000000000..e3198665fc --- /dev/null +++ b/udev/lib/libudev-enumerate.c @@ -0,0 +1,190 @@ +/* + * libudev - interface to udev device information + * + * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <stdio.h> +#include <stdlib.h> +#include <stddef.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <dirent.h> +#include <sys/stat.h> + +#include "libudev.h" +#include "libudev-private.h" +#include "../udev.h" + +static int devices_scan_subsystem(struct udev *udev, + const char *basedir, const char *subsystem, const char *subdir, + struct list_head *device_list) +{ + char path[PATH_SIZE]; + DIR *dir; + struct dirent *dent; + size_t len; + + len = strlcpy(path, udev_get_sys_path(udev), sizeof(path)); + strlcat(path, basedir, sizeof(path)); + strlcat(path, "/", sizeof(path)); + strlcat(path, subsystem, sizeof(path)); + if (subdir != NULL) + strlcat(path, subdir, sizeof(path)); + dir = opendir(path); + if (dir == NULL) + return -1; + for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { + char devpath[PATH_SIZE]; + + if (dent->d_name[0] == '.') + continue; + strlcpy(devpath, &path[len], sizeof(devpath)); + strlcat(devpath, "/", sizeof(devpath)); + strlcat(devpath, dent->d_name, sizeof(devpath)); + sysfs_resolve_link(devpath, sizeof(devpath)); + name_list_add(device_list, devpath, 1); + } + closedir(dir); + return 0; +} + +static int devices_scan_subsystems(struct udev *udev, + const char *basedir, const char *subsystem, const char *subdir, + struct list_head *device_list) +{ + char path[PATH_SIZE]; + DIR *dir; + struct dirent *dent; + + if (subsystem != NULL) + return devices_scan_subsystem(udev, basedir, subsystem, subdir, device_list); + + strlcpy(path, udev_get_sys_path(udev), sizeof(path)); + strlcat(path, basedir, sizeof(path)); + dir = opendir(path); + if (dir == NULL) + return -1; + for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { + if (dent->d_name[0] == '.') + continue; + devices_scan_subsystem(udev, basedir, dent->d_name, subdir, device_list); + } + closedir(dir); + return 0; +} + +static int devices_delay(struct udev *udev, const char *devpath) +{ + static const char *delay_device_list[] = { + "/block/md", + "/block/dm-", + NULL + }; + int i; + + for (i = 0; delay_device_list[i] != NULL; i++) { + if (strstr(devpath, delay_device_list[i]) != NULL) { + log_info(udev, "delaying: %s\n", devpath); + return 1; + } + } + return 0; +} + +static int devices_call(struct udev *udev, const char *devpath, + int (*cb)(struct udev *udev, + const char *devpath, const char *subsystem, const char *name, + void *data), + void *data, + int *cb_rc) +{ + char subsystem[NAME_SIZE]; + const char *name; + + name = strrchr(devpath, '/'); + if (name == NULL) + return -1; + name++; + + if (util_get_sys_subsystem(udev, devpath, subsystem, sizeof(subsystem)) < 2) + return -1; + *cb_rc = cb(udev, devpath, subsystem, name, data); + return 0; +} + +/** + * udev_devices_enumerate: + * @udev_device: udev device + * @cb: function to be called for every property found + * @data: data to be passed to the function + * + * Retrieve the property key/value pairs belonging to the + * udev device. For every key/value pair, the passed function will be + * called. If the function returns 1, remaning properties will be + * ignored. + * + * Returns: the number of properties passed to the caller, or a negative value on error + **/ +int udev_devices_enumerate(struct udev *udev, const char *subsystem, + int (*cb)(struct udev *udev, + const char *devpath, const char *subsystem, const char *name, void *data), + void *data) +{ + char base[PATH_SIZE]; + struct stat statbuf; + struct list_head device_list; + struct name_entry *loop_device; + struct name_entry *tmp_device; + int cb_rc = 0; + int count = 0; + + INIT_LIST_HEAD(&device_list); + + /* if we have /sys/subsystem/, forget all the old stuff */ + strlcpy(base, sysfs_path, sizeof(base)); + strlcat(base, "/subsystem", sizeof(base)); + if (stat(base, &statbuf) == 0) { + devices_scan_subsystems(udev, "/subsystem", subsystem, "/devices", &device_list); + } else { + devices_scan_subsystems(udev, "/bus", subsystem, "/devices", &device_list); + devices_scan_subsystems(udev, "/class", subsystem, NULL, &device_list); + } + + list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) { + if (devices_delay(udev, loop_device->name)) + continue; + if (cb_rc == 0) + if (devices_call(udev, loop_device->name, cb, data, &cb_rc) == 0) + count++; + list_del(&loop_device->node); + free(loop_device); + } + + /* handle remaining delayed devices */ + list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) { + if (cb_rc == 0) + if (devices_call(udev, loop_device->name, cb, data, &cb_rc) == 0) + count++; + list_del(&loop_device->node); + free(loop_device); + } + + return count; +} diff --git a/udev/lib/libudev-private.h b/udev/lib/libudev-private.h index 8f7e247f58..4697f84da8 100644 --- a/udev/lib/libudev-private.h +++ b/udev/lib/libudev-private.h @@ -57,4 +57,6 @@ static inline void udev_log(struct udev *udev, __attribute__ ((format(printf, 6, 7))) {} #endif +extern ssize_t util_get_sys_subsystem(struct udev *udev, const char *devpath, char *subsystem, size_t size); + #endif diff --git a/udev/lib/libudev-utils.c b/udev/lib/libudev-utils.c new file mode 100644 index 0000000000..8251b64da9 --- /dev/null +++ b/udev/lib/libudev-utils.c @@ -0,0 +1,53 @@ +/* + * libudev - interface to udev device information + * + * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <stdio.h> +#include <stdlib.h> +#include <stddef.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <dirent.h> +#include <sys/stat.h> + +#include "libudev.h" +#include "libudev-private.h" +#include "../udev.h" + +ssize_t util_get_sys_subsystem(struct udev *udev, const char *devpath, char *subsystem, size_t size) +{ + char path[PATH_SIZE]; + ssize_t len; + const char *pos; + + strlcpy(path, udev_get_sys_path(udev), sizeof(path)); + strlcat(path, devpath, sizeof(path)); + strlcat(path, "/subsystem", sizeof(path)); + len = readlink(path, path, sizeof(path)); + if (len < 0 || len >= (ssize_t) sizeof(path)) + return -1; + path[len] = '\0'; + pos = strrchr(path, '/'); + if (pos == NULL) + return -1; + pos = &pos[1]; + return strlcpy(subsystem, pos, size); +} diff --git a/udev/lib/libudev.c b/udev/lib/libudev.c index 098ca8f602..56bd47741d 100644 --- a/udev/lib/libudev.c +++ b/udev/lib/libudev.c @@ -74,26 +74,6 @@ void log_message(int priority, const char *format, ...) } #endif -static ssize_t get_subsystem(struct udev *udev, const char *devpath, char *subsystem, size_t size) -{ - char path[PATH_SIZE]; - ssize_t len; - const char *pos; - - strlcpy(path, udev_get_sys_path(udev), sizeof(path)); - strlcat(path, devpath, sizeof(path)); - strlcat(path, "/subsystem", sizeof(path)); - len = readlink(path, path, sizeof(path)); - if (len < 0 || len >= (ssize_t) sizeof(path)) - return -1; - path[len] = '\0'; - pos = strrchr(path, '/'); - if (pos == NULL) - return -1; - pos = &pos[1]; - return strlcpy(subsystem, pos, size); -} - /** * udev_new: * @@ -201,383 +181,3 @@ const char *udev_get_dev_path(struct udev *udev) { return udev_root; } - -static struct udev_device *device_init(struct udev *udev) -{ - struct udev_device *udev_device; - - udev_device = malloc(sizeof(struct udev_device)); - if (udev_device == NULL) - return NULL; - memset(udev_device, 0x00, sizeof(struct udev_device)); - udev_device->refcount = 1; - udev_device->udev = udev; - return udev_device; -} - -/** - * udev_device_new_from_devpath: - * @udev: udev library context - * @devpath: sys device path - * - * Create new udev device, and fill in information from the sysfs - * device and the udev database entry. The devpath must not contain - * the sysfs mount path, and must contain a leading '/'. - * - * The initial refcount is 1, and needs to be decremented to - * release the ressources of the udev device. - * - * Returns: a new udev device, or #NULL, if it does not exist - **/ -struct udev_device *udev_device_new_from_devpath(struct udev *udev, const char *devpath) -{ - char path[PATH_SIZE]; - struct stat statbuf; - struct udev_device *udev_device; - int err; - - strlcpy(path, udev_get_sys_path(udev), sizeof(path)); - strlcat(path, devpath, sizeof(path)); - if (stat(path, &statbuf) != 0) - return NULL; - if (!S_ISDIR(statbuf.st_mode)) - return NULL; - - udev_device = device_init(udev); - if (udev_device == NULL) - return NULL; - - udev_device->udevice = udev_device_init(NULL); - if (udev_device->udevice == NULL) { - free(udev_device); - return NULL; - } - log_info(udev, "device %p created\n", udev_device); - - strlcpy(path, devpath, sizeof(path)); - sysfs_resolve_link(path, sizeof(path)); - - err = udev_db_get_device(udev_device->udevice, path); - if (err >= 0) - log_info(udev, "device %p filled with udev database data\n", udev_device); - log_info(udev, "device %p filled with %s data\n", udev_device, udev_device_get_devpath(udev_device)); - return udev_device; -} - -/** - * udev_device_get_udev: - * - * Retrieve the udev library context the device was created with. - * - * Returns: the udev library context - **/ -struct udev *udev_device_get_udev(struct udev_device *udev_device) -{ - return udev_device->udev; -} - -/** - * udev_device_ref: - * @udev_device: udev device - * - * Take a reference of a udev device. - * - * Returns: the passed udev device - **/ -struct udev_device *udev_device_ref(struct udev_device *udev_device) -{ - udev_device->refcount++; - return udev_device; -} - -/** - * udev_device_unref: - * @udev_device: udev device - * - * Drop a reference of a udev device. If the refcount reaches zero, - * the ressources of the device will be released. - * - **/ -void udev_device_unref(struct udev_device *udev_device) -{ - udev_device->refcount--; - if (udev_device->refcount > 0) - return; - udev_device_cleanup(udev_device->udevice); - free(udev_device); -} - -/** - * udev_device_get_devpath: - * @udev_device: udev device - * - * Retrieve the sys path of the udev device. The path does not contain - * the sys mount point. - * - * Returns: the sys path of the udev device - **/ -const char *udev_device_get_devpath(struct udev_device *udev_device) -{ - return udev_device->udevice->dev->devpath; -} - -/** - * udev_device_get_devname: - * @udev_device: udev device - * - * Retrieve the device node file name belonging to the udev device. - * The path does not contain the device directory, and does not contain - * a leading '/'. - * - * Returns: the device node file name of the udev device, or #NULL if no device node exists - **/ -const char *udev_device_get_devname(struct udev_device *udev_device) -{ - if (udev_device->udevice->name[0] == '\0') - return NULL; - return udev_device->udevice->name; -} - -/** - * udev_device_get_subsystem: - * @udev_device: udev device - * - * Retrieve the subsystem string of the udev device. The string does not - * contain any "/". - * - * Returns: the subsystem name of the udev device, or #NULL if it can not be determined - **/ -const char *udev_device_get_subsystem(struct udev_device *udev_device) -{ - struct sysfs_device *dev = udev_device->udevice->dev; - if (dev->subsystem[0] != '\0') - return dev->subsystem; - if (get_subsystem(udev_device->udev, dev->devpath, - dev->subsystem, sizeof(dev->subsystem)) < 2) - return NULL; - return dev->subsystem; -} - -/** - * udev_device_get_devlinks: - * @udev_device: udev device - * @cb: function to be called for every device link found - * @data: data to be passed to the function - * - * Retrieve the device links pointing to the device file of the - * udev device. For every device link, the passed function will be - * called with the device link string. If the function returns 1, - * remaning device links will be ignored. The device link path - * does not contain the device directory, and does not contain - * a leading '/'. - * - * Returns: the number of device links passed to the caller, or a negative value on error - **/ -int udev_device_get_devlinks(struct udev_device *udev_device, - int (*cb)(struct udev_device *udev_device, const char *value, void *data), - void *data) -{ - struct name_entry *name_loop; - int count = 0; - - list_for_each_entry(name_loop, &udev_device->udevice->symlink_list, node) { - count++; - if (cb(udev_device, name_loop->name, data) != 0) - break; - } - return count; -} - -/** - * udev_device_get_properties: - * @udev_device: udev device - * @cb: function to be called for every property found - * @data: data to be passed to the function - * - * Retrieve the property key/value pairs belonging to the - * udev device. For every key/value pair, the passed function will be - * called. If the function returns 1, remaning properties will be - * ignored. - * - * Returns: the number of properties passed to the caller, or a negative value on error - **/ -int udev_device_get_properties(struct udev_device *udev_device, - int (*cb)(struct udev_device *udev_device, const char *key, const char *value, void *data), - void *data) -{ - struct name_entry *name_loop; - int count = 0; - - list_for_each_entry(name_loop, &udev_device->udevice->env_list, node) { - char name[PATH_SIZE]; - char *val; - - strncpy(name, name_loop->name, PATH_SIZE); - name[PATH_SIZE-1] = '\0'; - val = strchr(name, '='); - if (val == NULL) - continue; - val[0] = '\0'; - val = &val[1]; - if (cb(udev_device, name, val, data) != 0) - break; - } - return count; -} - -static int devices_scan_subsystem(struct udev *udev, - const char *basedir, const char *subsystem, const char *subdir, - struct list_head *device_list) -{ - char path[PATH_SIZE]; - DIR *dir; - struct dirent *dent; - size_t len; - - len = strlcpy(path, udev_get_sys_path(udev), sizeof(path)); - strlcat(path, basedir, sizeof(path)); - strlcat(path, "/", sizeof(path)); - strlcat(path, subsystem, sizeof(path)); - if (subdir != NULL) - strlcat(path, subdir, sizeof(path)); - dir = opendir(path); - if (dir == NULL) - return -1; - for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { - char devpath[PATH_SIZE]; - - if (dent->d_name[0] == '.') - continue; - strlcpy(devpath, &path[len], sizeof(devpath)); - strlcat(devpath, "/", sizeof(devpath)); - strlcat(devpath, dent->d_name, sizeof(devpath)); - sysfs_resolve_link(devpath, sizeof(devpath)); - name_list_add(device_list, devpath, 1); - } - closedir(dir); - return 0; -} - -static int devices_scan_subsystems(struct udev *udev, - const char *basedir, const char *subsystem, const char *subdir, - struct list_head *device_list) -{ - char path[PATH_SIZE]; - DIR *dir; - struct dirent *dent; - - if (subsystem != NULL) - return devices_scan_subsystem(udev, basedir, subsystem, subdir, device_list); - - strlcpy(path, udev_get_sys_path(udev), sizeof(path)); - strlcat(path, basedir, sizeof(path)); - dir = opendir(path); - if (dir == NULL) - return -1; - for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { - if (dent->d_name[0] == '.') - continue; - devices_scan_subsystem(udev, basedir, dent->d_name, subdir, device_list); - } - closedir(dir); - return 0; -} - -static int devices_delay(struct udev *udev, const char *devpath) -{ - static const char *delay_device_list[] = { - "/block/md", - "/block/dm-", - NULL - }; - int i; - - for (i = 0; delay_device_list[i] != NULL; i++) { - if (strstr(devpath, delay_device_list[i]) != NULL) { - log_info(udev, "delaying: %s\n", devpath); - return 1; - } - } - return 0; -} - -static int devices_call(struct udev *udev, const char *devpath, - int (*cb)(struct udev *udev, - const char *devpath, const char *subsystem, const char *name, - void *data), - void *data, - int *cb_rc) -{ - char subsystem[NAME_SIZE]; - const char *name; - - name = strrchr(devpath, '/'); - if (name == NULL) - return -1; - name++; - - if (get_subsystem(udev, devpath, subsystem, sizeof(subsystem)) < 2) - return -1; - *cb_rc = cb(udev, devpath, subsystem, name, data); - return 0; -} - -/** - * udev_devices_enumerate: - * @udev_device: udev device - * @cb: function to be called for every property found - * @data: data to be passed to the function - * - * Retrieve the property key/value pairs belonging to the - * udev device. For every key/value pair, the passed function will be - * called. If the function returns 1, remaning properties will be - * ignored. - * - * Returns: the number of properties passed to the caller, or a negative value on error - **/ -int udev_devices_enumerate(struct udev *udev, const char *subsystem, - int (*cb)(struct udev *udev, - const char *devpath, const char *subsystem, const char *name, void *data), - void *data) -{ - char base[PATH_SIZE]; - struct stat statbuf; - struct list_head device_list; - struct name_entry *loop_device; - struct name_entry *tmp_device; - int cb_rc = 0; - int count = 0; - - INIT_LIST_HEAD(&device_list); - - /* if we have /sys/subsystem/, forget all the old stuff */ - strlcpy(base, sysfs_path, sizeof(base)); - strlcat(base, "/subsystem", sizeof(base)); - if (stat(base, &statbuf) == 0) { - devices_scan_subsystems(udev, "/subsystem", subsystem, "/devices", &device_list); - } else { - devices_scan_subsystems(udev, "/bus", subsystem, "/devices", &device_list); - devices_scan_subsystems(udev, "/class", subsystem, NULL, &device_list); - } - - list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) { - if (devices_delay(udev, loop_device->name)) - continue; - if (cb_rc == 0) - if (devices_call(udev, loop_device->name, cb, data, &cb_rc) == 0) - count++; - list_del(&loop_device->node); - free(loop_device); - } - - /* handle remaining delayed devices */ - list_for_each_entry_safe(loop_device, tmp_device, &device_list, node) { - if (cb_rc == 0) - if (devices_call(udev, loop_device->name, cb, data, &cb_rc) == 0) - count++; - list_del(&loop_device->node); - free(loop_device); - } - - return count; -} |