+++ /dev/null
-/*
- * libudev - interface to udev device information
- *
- * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
- *
- * 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.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stddef.h>
-#include <unistd.h>
-#include <stdbool.h>
-#include <errno.h>
-#include <string.h>
-#include <dirent.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <net/if.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <linux/sockios.h>
-
-#include "libudev.h"
-#include "libudev-private.h"
-
-/**
- * SECTION:libudev-device
- * @short_description: kernel sys devices
- *
- * Representation of kernel sys devices. Devices are uniquely identified
- * by their syspath, every device has exactly one path in the kernel sys
- * filesystem. Devices usually belong to a kernel subsystem, and and have
- * a unique name inside that subsystem.
- */
-
-/**
- * udev_device:
- *
- * Opaque object representing one kernel sys device.
- */
-struct udev_device {
- struct udev *udev;
- struct udev_device *parent_device;
- char *syspath;
- const char *devpath;
- char *sysname;
- const char *sysnum;
- char *devnode;
- mode_t devnode_mode;
- char *subsystem;
- char *devtype;
- char *driver;
- char *action;
- char *devpath_old;
- char *id_filename;
- char **envp;
- char *monitor_buf;
- size_t monitor_buf_len;
- struct udev_list devlinks_list;
- struct udev_list properties_list;
- struct udev_list sysattr_value_list;
- struct udev_list sysattr_list;
- struct udev_list tags_list;
- unsigned long long int seqnum;
- unsigned long long int usec_initialized;
- int devlink_priority;
- int refcount;
- dev_t devnum;
- int ifindex;
- int watch_handle;
- int maj, min;
- bool parent_set;
- bool subsystem_set;
- bool devtype_set;
- bool devlinks_uptodate;
- bool envp_uptodate;
- bool tags_uptodate;
- bool driver_set;
- bool info_loaded;
- bool db_loaded;
- bool uevent_loaded;
- bool is_initialized;
- bool sysattr_list_read;
- bool db_persist;
-};
-
-/**
- * udev_device_get_seqnum:
- * @udev_device: udev device
- *
- * This is only valid if the device was received through a monitor. Devices read from
- * sys do not have a sequence number.
- *
- * Returns: the kernel event sequence number, or 0 if there is no sequence number available.
- **/
-_public_ unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return 0;
- return udev_device->seqnum;
-}
-
-static int udev_device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum)
-{
- char num[32];
-
- udev_device->seqnum = seqnum;
- snprintf(num, sizeof(num), "%llu", seqnum);
- udev_device_add_property(udev_device, "SEQNUM", num);
- return 0;
-}
-
-int udev_device_get_ifindex(struct udev_device *udev_device)
-{
- if (!udev_device->info_loaded)
- udev_device_read_uevent_file(udev_device);
- return udev_device->ifindex;
-}
-
-static int udev_device_set_ifindex(struct udev_device *udev_device, int ifindex)
-{
- char num[32];
-
- udev_device->ifindex = ifindex;
- snprintf(num, sizeof(num), "%u", ifindex);
- udev_device_add_property(udev_device, "IFINDEX", num);
- return 0;
-}
-
-/**
- * udev_device_get_devnum:
- * @udev_device: udev device
- *
- * Returns: the device major/minor number.
- **/
-_public_ dev_t udev_device_get_devnum(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return makedev(0, 0);
- if (!udev_device->info_loaded)
- udev_device_read_uevent_file(udev_device);
- return udev_device->devnum;
-}
-
-static int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum)
-{
- char num[32];
-
- udev_device->devnum = devnum;
-
- snprintf(num, sizeof(num), "%u", major(devnum));
- udev_device_add_property(udev_device, "MAJOR", num);
- snprintf(num, sizeof(num), "%u", minor(devnum));
- udev_device_add_property(udev_device, "MINOR", num);
- return 0;
-}
-
-const char *udev_device_get_devpath_old(struct udev_device *udev_device)
-{
- return udev_device->devpath_old;
-}
-
-static int udev_device_set_devpath_old(struct udev_device *udev_device, const char *devpath_old)
-{
- const char *pos;
-
- free(udev_device->devpath_old);
- udev_device->devpath_old = strdup(devpath_old);
- if (udev_device->devpath_old == NULL)
- return -ENOMEM;
- udev_device_add_property(udev_device, "DEVPATH_OLD", udev_device->devpath_old);
-
- pos = strrchr(udev_device->devpath_old, '/');
- if (pos == NULL)
- return -EINVAL;
- return 0;
-}
-
-/**
- * udev_device_get_driver:
- * @udev_device: udev device
- *
- * Returns: the driver string, or #NULL if there is no driver attached.
- **/
-_public_ const char *udev_device_get_driver(struct udev_device *udev_device)
-{
- char driver[UTIL_NAME_SIZE];
-
- if (udev_device == NULL)
- return NULL;
- if (!udev_device->driver_set) {
- udev_device->driver_set = true;
- if (util_get_sys_core_link_value(udev_device->udev, "driver", udev_device->syspath, driver, sizeof(driver)) > 0)
- udev_device->driver = strdup(driver);
- }
- return udev_device->driver;
-}
-
-static int udev_device_set_driver(struct udev_device *udev_device, const char *driver)
-{
- free(udev_device->driver);
- udev_device->driver = strdup(driver);
- if (udev_device->driver == NULL)
- return -ENOMEM;
- udev_device->driver_set = true;
- udev_device_add_property(udev_device, "DRIVER", udev_device->driver);
- return 0;
-}
-
-/**
- * udev_device_get_devtype:
- * @udev_device: udev device
- *
- * Retrieve the devtype string of the udev device.
- *
- * Returns: the devtype name of the udev device, or #NULL if it can not be determined
- **/
-_public_ const char *udev_device_get_devtype(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- if (!udev_device->devtype_set) {
- udev_device->devtype_set = true;
- udev_device_read_uevent_file(udev_device);
- }
- return udev_device->devtype;
-}
-
-static int udev_device_set_devtype(struct udev_device *udev_device, const char *devtype)
-{
- free(udev_device->devtype);
- udev_device->devtype = strdup(devtype);
- if (udev_device->devtype == NULL)
- return -ENOMEM;
- udev_device->devtype_set = true;
- udev_device_add_property(udev_device, "DEVTYPE", udev_device->devtype);
- return 0;
-}
-
-static int udev_device_set_subsystem(struct udev_device *udev_device, const char *subsystem)
-{
- free(udev_device->subsystem);
- udev_device->subsystem = strdup(subsystem);
- if (udev_device->subsystem == NULL)
- return -ENOMEM;
- udev_device->subsystem_set = true;
- udev_device_add_property(udev_device, "SUBSYSTEM", udev_device->subsystem);
- return 0;
-}
-
-/**
- * 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
- **/
-_public_ const char *udev_device_get_subsystem(struct udev_device *udev_device)
-{
- char subsystem[UTIL_NAME_SIZE];
-
- if (udev_device == NULL)
- return NULL;
- if (!udev_device->subsystem_set) {
- udev_device->subsystem_set = true;
- /* read "subsystem" link */
- if (util_get_sys_core_link_value(udev_device->udev, "subsystem", udev_device->syspath, subsystem, sizeof(subsystem)) > 0) {
- udev_device_set_subsystem(udev_device, subsystem);
- return udev_device->subsystem;
- }
- /* implicit names */
- if (strncmp(udev_device->devpath, "/module/", 8) == 0) {
- udev_device_set_subsystem(udev_device, "module");
- return udev_device->subsystem;
- }
- if (strstr(udev_device->devpath, "/drivers/") != NULL) {
- udev_device_set_subsystem(udev_device, "drivers");
- return udev_device->subsystem;
- }
- if (strncmp(udev_device->devpath, "/subsystem/", 11) == 0 ||
- strncmp(udev_device->devpath, "/class/", 7) == 0 ||
- strncmp(udev_device->devpath, "/bus/", 5) == 0) {
- udev_device_set_subsystem(udev_device, "subsystem");
- return udev_device->subsystem;
- }
- }
- return udev_device->subsystem;
-}
-
-mode_t udev_device_get_devnode_mode(struct udev_device *udev_device)
-{
- if (!udev_device->info_loaded)
- udev_device_read_uevent_file(udev_device);
- return udev_device->devnode_mode;
-}
-
-static int udev_device_set_devnode_mode(struct udev_device *udev_device, mode_t mode)
-{
- char num[32];
-
- udev_device->devnode_mode = mode;
- snprintf(num, sizeof(num), "%#o", mode);
- udev_device_add_property(udev_device, "DEVMODE", num);
- return 0;
-}
-
-struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value)
-{
- udev_device->envp_uptodate = false;
- if (value == NULL) {
- struct udev_list_entry *list_entry;
-
- list_entry = udev_device_get_properties_list_entry(udev_device);
- list_entry = udev_list_entry_get_by_name(list_entry, key);
- if (list_entry != NULL)
- udev_list_entry_delete(list_entry);
- return NULL;
- }
- return udev_list_entry_add(&udev_device->properties_list, key, value);
-}
-
-static struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property)
-{
- char name[UTIL_LINE_SIZE];
- char *val;
-
- util_strscpy(name, sizeof(name), property);
- val = strchr(name, '=');
- if (val == NULL)
- return NULL;
- val[0] = '\0';
- val = &val[1];
- if (val[0] == '\0')
- val = NULL;
- return udev_device_add_property(udev_device, name, val);
-}
-
-/*
- * parse property string, and if needed, update internal values accordingly
- *
- * udev_device_add_property_from_string_parse_finish() needs to be
- * called after adding properties, and its return value checked
- *
- * udev_device_set_info_loaded() needs to be set, to avoid trying
- * to use a device without a DEVPATH set
- */
-void udev_device_add_property_from_string_parse(struct udev_device *udev_device, const char *property)
-{
- if (strncmp(property, "DEVPATH=", 8) == 0) {
- char path[UTIL_PATH_SIZE];
-
- util_strscpyl(path, sizeof(path), udev_get_sys_path(udev_device->udev), &property[8], NULL);
- udev_device_set_syspath(udev_device, path);
- } else if (strncmp(property, "SUBSYSTEM=", 10) == 0) {
- udev_device_set_subsystem(udev_device, &property[10]);
- } else if (strncmp(property, "DEVTYPE=", 8) == 0) {
- udev_device_set_devtype(udev_device, &property[8]);
- } else if (strncmp(property, "DEVNAME=", 8) == 0) {
- udev_device_set_devnode(udev_device, &property[8]);
- } else if (strncmp(property, "DEVLINKS=", 9) == 0) {
- char devlinks[UTIL_PATH_SIZE];
- char *slink;
- char *next;
-
- util_strscpy(devlinks, sizeof(devlinks), &property[9]);
- slink = devlinks;
- next = strchr(slink, ' ');
- while (next != NULL) {
- next[0] = '\0';
- udev_device_add_devlink(udev_device, slink, 0);
- slink = &next[1];
- next = strchr(slink, ' ');
- }
- if (slink[0] != '\0')
- udev_device_add_devlink(udev_device, slink, 0);
- } else if (strncmp(property, "TAGS=", 5) == 0) {
- char tags[UTIL_PATH_SIZE];
- char *next;
-
- util_strscpy(tags, sizeof(tags), &property[5]);
- next = strchr(tags, ':');
- if (next != NULL) {
- next++;
- while (next[0] != '\0') {
- char *tag;
-
- tag = next;
- next = strchr(tag, ':');
- if (next == NULL)
- break;
- next[0] = '\0';
- next++;
- udev_device_add_tag(udev_device, tag);
- }
- }
- } else if (strncmp(property, "USEC_INITIALIZED=", 19) == 0) {
- udev_device_set_usec_initialized(udev_device, strtoull(&property[19], NULL, 10));
- } else if (strncmp(property, "DRIVER=", 7) == 0) {
- udev_device_set_driver(udev_device, &property[7]);
- } else if (strncmp(property, "ACTION=", 7) == 0) {
- udev_device_set_action(udev_device, &property[7]);
- } else if (strncmp(property, "MAJOR=", 6) == 0) {
- udev_device->maj = strtoull(&property[6], NULL, 10);
- } else if (strncmp(property, "MINOR=", 6) == 0) {
- udev_device->min = strtoull(&property[6], NULL, 10);
- } else if (strncmp(property, "DEVPATH_OLD=", 12) == 0) {
- udev_device_set_devpath_old(udev_device, &property[12]);
- } else if (strncmp(property, "SEQNUM=", 7) == 0) {
- udev_device_set_seqnum(udev_device, strtoull(&property[7], NULL, 10));
- } else if (strncmp(property, "IFINDEX=", 8) == 0) {
- udev_device_set_ifindex(udev_device, strtoull(&property[8], NULL, 10));
- } else if (strncmp(property, "DEVMODE=", 8) == 0) {
- udev_device_set_devnode_mode(udev_device, strtoul(&property[8], NULL, 8));
- } else {
- udev_device_add_property_from_string(udev_device, property);
- }
-}
-
-int udev_device_add_property_from_string_parse_finish(struct udev_device *udev_device)
-{
- if (udev_device->maj > 0)
- udev_device_set_devnum(udev_device, makedev(udev_device->maj, udev_device->min));
- udev_device->maj = 0;
- udev_device->min = 0;
-
- if (udev_device->devpath == NULL || udev_device->subsystem == NULL)
- return -EINVAL;
- return 0;
-}
-
-/**
- * udev_device_get_property_value:
- * @udev_device: udev device
- * @key: property name
- *
- * Returns: the value of a device property, or #NULL if there is no such property.
- **/
-_public_ const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key)
-{
- struct udev_list_entry *list_entry;
-
- if (udev_device == NULL)
- return NULL;
- if (key == NULL)
- return NULL;
-
- list_entry = udev_device_get_properties_list_entry(udev_device);
- list_entry = udev_list_entry_get_by_name(list_entry, key);
- return udev_list_entry_get_value(list_entry);
-}
-
-int udev_device_read_db(struct udev_device *udev_device, const char *dbfile)
-{
- char filename[UTIL_PATH_SIZE];
- char line[UTIL_LINE_SIZE];
- FILE *f;
-
- /* providing a database file will always force-load it */
- if (dbfile == NULL) {
- const char *id;
-
- if (udev_device->db_loaded)
- return 0;
- udev_device->db_loaded = true;
-
- id = udev_device_get_id_filename(udev_device);
- if (id == NULL)
- return -1;
- util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev_device->udev), "/data/", id, NULL);
- dbfile = filename;
- }
-
- f = fopen(dbfile, "re");
- if (f == NULL) {
- dbg(udev_device->udev, "no db file to read %s: %m\n", dbfile);
- return -1;
- }
- udev_device->is_initialized = true;
-
- while (fgets(line, sizeof(line), f)) {
- ssize_t len;
- const char *val;
- struct udev_list_entry *entry;
-
- len = strlen(line);
- if (len < 4)
- break;
- line[len-1] = '\0';
- val = &line[2];
- switch(line[0]) {
- case 'S':
- util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", val, NULL);
- udev_device_add_devlink(udev_device, filename, 0);
- break;
- case 'L':
- udev_device_set_devlink_priority(udev_device, atoi(val));
- break;
- case 'E':
- entry = udev_device_add_property_from_string(udev_device, val);
- udev_list_entry_set_num(entry, true);
- break;
- case 'G':
- udev_device_add_tag(udev_device, val);
- break;
- case 'W':
- udev_device_set_watch_handle(udev_device, atoi(val));
- break;
- case 'I':
- udev_device_set_usec_initialized(udev_device, strtoull(val, NULL, 10));
- break;
- }
- }
- fclose(f);
-
- dbg(udev_device->udev, "device %p filled with db file data\n", udev_device);
- return 0;
-}
-
-int udev_device_read_uevent_file(struct udev_device *udev_device)
-{
- char filename[UTIL_PATH_SIZE];
- FILE *f;
- char line[UTIL_LINE_SIZE];
- int maj = 0;
- int min = 0;
-
- if (udev_device->uevent_loaded)
- return 0;
-
- util_strscpyl(filename, sizeof(filename), udev_device->syspath, "/uevent", NULL);
- f = fopen(filename, "re");
- if (f == NULL)
- return -1;
- udev_device->uevent_loaded = true;
-
- while (fgets(line, sizeof(line), f)) {
- char *pos;
-
- pos = strchr(line, '\n');
- if (pos == NULL)
- continue;
- pos[0] = '\0';
-
- if (strncmp(line, "DEVTYPE=", 8) == 0) {
- udev_device_set_devtype(udev_device, &line[8]);
- continue;
- }
- if (strncmp(line, "IFINDEX=", 8) == 0) {
- udev_device_set_ifindex(udev_device, strtoull(&line[8], NULL, 10));
- continue;
- }
- if (strncmp(line, "DEVNAME=", 8) == 0) {
- udev_device_set_devnode(udev_device, &line[8]);
- continue;
- }
-
- if (strncmp(line, "MAJOR=", 6) == 0)
- maj = strtoull(&line[6], NULL, 10);
- else if (strncmp(line, "MINOR=", 6) == 0)
- min = strtoull(&line[6], NULL, 10);
- else if (strncmp(line, "DEVMODE=", 8) == 0)
- udev_device->devnode_mode = strtoul(&line[8], NULL, 8);
-
- udev_device_add_property_from_string(udev_device, line);
- }
-
- udev_device->devnum = makedev(maj, min);
- fclose(f);
- return 0;
-}
-
-void udev_device_set_info_loaded(struct udev_device *device)
-{
- device->info_loaded = true;
-}
-
-struct udev_device *udev_device_new(struct udev *udev)
-{
- struct udev_device *udev_device;
- struct udev_list_entry *list_entry;
-
- if (udev == NULL)
- return NULL;
-
- udev_device = calloc(1, sizeof(struct udev_device));
- if (udev_device == NULL)
- return NULL;
- udev_device->refcount = 1;
- udev_device->udev = udev;
- udev_list_init(udev, &udev_device->devlinks_list, true);
- udev_list_init(udev, &udev_device->properties_list, true);
- udev_list_init(udev, &udev_device->sysattr_value_list, true);
- udev_list_init(udev, &udev_device->sysattr_list, false);
- udev_list_init(udev, &udev_device->tags_list, true);
- udev_device->watch_handle = -1;
- /* copy global properties */
- udev_list_entry_foreach(list_entry, udev_get_properties_list_entry(udev))
- udev_device_add_property(udev_device,
- udev_list_entry_get_name(list_entry),
- udev_list_entry_get_value(list_entry));
- return udev_device;
-}
-
-/**
- * udev_device_new_from_syspath:
- * @udev: udev library context
- * @syspath: sys device path including sys directory
- *
- * Create new udev device, and fill in information from the sys
- * device and the udev database entry. The syspath is the absolute
- * path to the device, including the sys mount point.
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the resources of the udev device.
- *
- * Returns: a new udev device, or #NULL, if it does not exist
- **/
-_public_ struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath)
-{
- size_t len;
- const char *subdir;
- char path[UTIL_PATH_SIZE];
- char *pos;
- struct stat statbuf;
- struct udev_device *udev_device;
-
- if (udev == NULL)
- return NULL;
- if (syspath == NULL)
- return NULL;
-
- /* path starts in sys */
- len = strlen(udev_get_sys_path(udev));
- if (strncmp(syspath, udev_get_sys_path(udev), len) != 0) {
- dbg(udev, "not in sys :%s\n", syspath);
- return NULL;
- }
-
- /* path is not a root directory */
- subdir = &syspath[len+1];
- pos = strrchr(subdir, '/');
- if (pos == NULL || pos[1] == '\0' || pos < &subdir[2])
- return NULL;
-
- /* resolve possible symlink to real path */
- util_strscpy(path, sizeof(path), syspath);
- util_resolve_sys_link(udev, path, sizeof(path));
-
- if (strncmp(&path[len], "/devices/", 9) == 0) {
- char file[UTIL_PATH_SIZE];
-
- /* all "devices" require a "uevent" file */
- util_strscpyl(file, sizeof(file), path, "/uevent", NULL);
- if (stat(file, &statbuf) != 0)
- return NULL;
- } else {
- /* everything else just needs to be a directory */
- if (stat(path, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode))
- return NULL;
- }
-
- udev_device = udev_device_new(udev);
- if (udev_device == NULL)
- return NULL;
-
- udev_device_set_syspath(udev_device, path);
- dbg(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device));
-
- return udev_device;
-}
-
-/**
- * udev_device_new_from_devnum:
- * @udev: udev library context
- * @type: char or block device
- * @devnum: device major/minor number
- *
- * Create new udev device, and fill in information from the sys
- * device and the udev database entry. The device is looked-up
- * by its major/minor number and type. Character and block device
- * numbers are not unique across the two types.
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the resources of the udev device.
- *
- * Returns: a new udev device, or #NULL, if it does not exist
- **/
-_public_ struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum)
-{
- char path[UTIL_PATH_SIZE];
- const char *type_str;
-
- if (type == 'b')
- type_str = "block";
- else if (type == 'c')
- type_str = "char";
- else
- return NULL;
-
- /* use /sys/dev/{block,char}/<maj>:<min> link */
- snprintf(path, sizeof(path), "%s/dev/%s/%u:%u",
- udev_get_sys_path(udev), type_str, major(devnum), minor(devnum));
- return udev_device_new_from_syspath(udev, path);
-}
-
-struct udev_device *udev_device_new_from_id_filename(struct udev *udev, char *id)
-{
- char type;
- int maj, min;
- char subsys[UTIL_PATH_SIZE];
- char *sysname;
-
- switch(id[0]) {
- case 'b':
- case 'c':
- if (sscanf(id, "%c%i:%i", &type, &maj, &min) != 3)
- return NULL;
- return udev_device_new_from_devnum(udev, type, makedev(maj, min));
- case 'n': {
- int sk;
- struct ifreq ifr;
- struct udev_device *dev;
- int ifindex;
-
- ifindex = strtoul(&id[1], NULL, 10);
- if (ifindex <= 0)
- return NULL;
-
- sk = socket(PF_INET, SOCK_DGRAM, 0);
- if (sk < 0)
- return NULL;
- memset(&ifr, 0x00, sizeof(struct ifreq));
- ifr.ifr_ifindex = ifindex;
- if (ioctl(sk, SIOCGIFNAME, &ifr) != 0) {
- close(sk);
- return NULL;
- }
- close(sk);
-
- dev = udev_device_new_from_subsystem_sysname(udev, "net", ifr.ifr_name);
- if (dev == NULL)
- return NULL;
- if (udev_device_get_ifindex(dev) == ifindex)
- return dev;
- udev_device_unref(dev);
- return NULL;
- }
- case '+':
- util_strscpy(subsys, sizeof(subsys), &id[1]);
- sysname = strchr(subsys, ':');
- if (sysname == NULL)
- return NULL;
- sysname[0] = '\0';
- sysname = &sysname[1];
- return udev_device_new_from_subsystem_sysname(udev, subsys, sysname);
- default:
- return NULL;
- }
-}
-
-/**
- * udev_device_new_from_subsystem_sysname:
- * @udev: udev library context
- * @subsystem: the subsystem of the device
- * @sysname: the name of the device
- *
- * Create new udev device, and fill in information from the sys device
- * and the udev database entry. The device is looked up by the subsystem
- * and name string of the device, like "mem" / "zero", or "block" / "sda".
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the resources of the udev device.
- *
- * Returns: a new udev device, or #NULL, if it does not exist
- **/
-_public_ struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname)
-{
- char path_full[UTIL_PATH_SIZE];
- char *path;
- size_t l;
- struct stat statbuf;
-
- path = path_full;
- l = util_strpcpyl(&path, sizeof(path_full), udev_get_sys_path(udev), NULL);
-
- if (strcmp(subsystem, "subsystem") == 0) {
- util_strscpyl(path, l, "/subsystem/", sysname, NULL);
- if (stat(path_full, &statbuf) == 0)
- goto found;
-
- util_strscpyl(path, l, "/bus/", sysname, NULL);
- if (stat(path_full, &statbuf) == 0)
- goto found;
-
- util_strscpyl(path, l, "/class/", sysname, NULL);
- if (stat(path_full, &statbuf) == 0)
- goto found;
- goto out;
- }
-
- if (strcmp(subsystem, "module") == 0) {
- util_strscpyl(path, l, "/module/", sysname, NULL);
- if (stat(path_full, &statbuf) == 0)
- goto found;
- goto out;
- }
-
- if (strcmp(subsystem, "drivers") == 0) {
- char subsys[UTIL_NAME_SIZE];
- char *driver;
-
- util_strscpy(subsys, sizeof(subsys), sysname);
- driver = strchr(subsys, ':');
- if (driver != NULL) {
- driver[0] = '\0';
- driver = &driver[1];
-
- util_strscpyl(path, l, "/subsystem/", subsys, "/drivers/", driver, NULL);
- if (stat(path_full, &statbuf) == 0)
- goto found;
-
- util_strscpyl(path, l, "/bus/", subsys, "/drivers/", driver, NULL);
- if (stat(path_full, &statbuf) == 0)
- goto found;
- }
- goto out;
- }
-
- util_strscpyl(path, l, "/subsystem/", subsystem, "/devices/", sysname, NULL);
- if (stat(path_full, &statbuf) == 0)
- goto found;
-
- util_strscpyl(path, l, "/bus/", subsystem, "/devices/", sysname, NULL);
- if (stat(path_full, &statbuf) == 0)
- goto found;
-
- util_strscpyl(path, l, "/class/", subsystem, "/", sysname, NULL);
- if (stat(path_full, &statbuf) == 0)
- goto found;
-out:
- return NULL;
-found:
- return udev_device_new_from_syspath(udev, path_full);
-}
-
-/**
- * udev_device_new_from_environment
- * @udev: udev library context
- *
- * Create new udev device, and fill in information from the
- * current process environment. This only works reliable if
- * the process is called from a udev rule. It is usually used
- * for tools executed from IMPORT= rules.
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the resources of the udev device.
- *
- * Returns: a new udev device, or #NULL, if it does not exist
- **/
-_public_ struct udev_device *udev_device_new_from_environment(struct udev *udev)
-{
- int i;
- struct udev_device *udev_device;
-
- udev_device = udev_device_new(udev);
- if (udev_device == NULL)
- return NULL;
- udev_device_set_info_loaded(udev_device);
-
- for (i = 0; environ[i] != NULL; i++)
- udev_device_add_property_from_string_parse(udev_device, environ[i]);
-
- if (udev_device_add_property_from_string_parse_finish(udev_device) < 0) {
- dbg(udev, "missing values, invalid device\n");
- udev_device_unref(udev_device);
- udev_device = NULL;
- }
-
- return udev_device;
-}
-
-static struct udev_device *device_new_from_parent(struct udev_device *udev_device)
-{
- struct udev_device *udev_device_parent = NULL;
- char path[UTIL_PATH_SIZE];
- const char *subdir;
-
- util_strscpy(path, sizeof(path), udev_device->syspath);
- subdir = &path[strlen(udev_get_sys_path(udev_device->udev))+1];
- for (;;) {
- char *pos;
-
- pos = strrchr(subdir, '/');
- if (pos == NULL || pos < &subdir[2])
- break;
- pos[0] = '\0';
- udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
- if (udev_device_parent != NULL)
- return udev_device_parent;
- }
- return NULL;
-}
-
-/**
- * udev_device_get_parent:
- * @udev_device: the device to start searching from
- *
- * Find the next parent device, and fill in information from the sys
- * device and the udev database entry.
- *
- * The returned the device is not referenced. It is attached to the
- * child device, and will be cleaned up when the child device
- * is cleaned up.
- *
- * It is not necessarily just the upper level directory, empty or not
- * recognized sys directories are ignored.
- *
- * It can be called as many times as needed, without caring about
- * references.
- *
- * Returns: a new udev device, or #NULL, if it no parent exist.
- **/
-_public_ struct udev_device *udev_device_get_parent(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- if (!udev_device->parent_set) {
- udev_device->parent_set = true;
- udev_device->parent_device = device_new_from_parent(udev_device);
- }
- return udev_device->parent_device;
-}
-
-/**
- * udev_device_get_parent_with_subsystem_devtype:
- * @udev_device: udev device to start searching from
- * @subsystem: the subsystem of the device
- * @devtype: the type (DEVTYPE) of the device
- *
- * Find the next parent device, with a matching subsystem and devtype
- * value, and fill in information from the sys device and the udev
- * database entry.
- *
- * If devtype is #NULL, only subsystem is checked, and any devtype will
- * match.
- *
- * The returned the device is not referenced. It is attached to the
- * child device, and will be cleaned up when the child device
- * is cleaned up.
- *
- * It can be called as many times as needed, without caring about
- * references.
- *
- * Returns: a new udev device, or #NULL if no matching parent exists.
- **/
-_public_ struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype)
-{
- struct udev_device *parent;
-
- if (subsystem == NULL)
- return NULL;
-
- parent = udev_device_get_parent(udev_device);
- while (parent != NULL) {
- const char *parent_subsystem;
- const char *parent_devtype;
-
- parent_subsystem = udev_device_get_subsystem(parent);
- if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0) {
- if (devtype == NULL)
- break;
- parent_devtype = udev_device_get_devtype(parent);
- if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0)
- break;
- }
- parent = udev_device_get_parent(parent);
- }
- return parent;
-}
-
-/**
- * udev_device_get_udev:
- * @udev_device: udev device
- *
- * Retrieve the udev library context the device was created with.
- *
- * Returns: the udev library context
- **/
-_public_ struct udev *udev_device_get_udev(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- return udev_device->udev;
-}
-
-/**
- * udev_device_ref:
- * @udev_device: udev device
- *
- * Take a reference of a udev device.
- *
- * Returns: the passed udev device
- **/
-_public_ struct udev_device *udev_device_ref(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- 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 resources of the device will be released.
- *
- **/
-_public_ void udev_device_unref(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return;
- udev_device->refcount--;
- if (udev_device->refcount > 0)
- return;
- if (udev_device->parent_device != NULL)
- udev_device_unref(udev_device->parent_device);
- free(udev_device->syspath);
- free(udev_device->sysname);
- free(udev_device->devnode);
- free(udev_device->subsystem);
- free(udev_device->devtype);
- udev_list_cleanup(&udev_device->devlinks_list);
- udev_list_cleanup(&udev_device->properties_list);
- udev_list_cleanup(&udev_device->sysattr_value_list);
- udev_list_cleanup(&udev_device->sysattr_list);
- udev_list_cleanup(&udev_device->tags_list);
- free(udev_device->action);
- free(udev_device->driver);
- free(udev_device->devpath_old);
- free(udev_device->id_filename);
- free(udev_device->envp);
- free(udev_device->monitor_buf);
- free(udev_device);
-}
-
-/**
- * udev_device_get_devpath:
- * @udev_device: udev device
- *
- * Retrieve the kernel devpath value of the udev device. The path
- * does not contain the sys mount point, and starts with a '/'.
- *
- * Returns: the devpath of the udev device
- **/
-_public_ const char *udev_device_get_devpath(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- return udev_device->devpath;
-}
-
-/**
- * udev_device_get_syspath:
- * @udev_device: udev device
- *
- * Retrieve the sys path of the udev device. The path is an
- * absolute path and starts with the sys mount point.
- *
- * Returns: the sys path of the udev device
- **/
-_public_ const char *udev_device_get_syspath(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- return udev_device->syspath;
-}
-
-/**
- * udev_device_get_sysname:
- * @udev_device: udev device
- *
- * Returns: the sys name of the device device
- **/
-_public_ const char *udev_device_get_sysname(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- return udev_device->sysname;
-}
-
-/**
- * udev_device_get_sysnum:
- * @udev_device: udev device
- *
- * Returns: the trailing number of of the device name
- **/
-_public_ const char *udev_device_get_sysnum(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- return udev_device->sysnum;
-}
-
-/**
- * udev_device_get_devnode:
- * @udev_device: udev device
- *
- * Retrieve the device node file name belonging to the udev device.
- * The path is an absolute path, and starts with the device directory.
- *
- * Returns: the device node file name of the udev device, or #NULL if no device node exists
- **/
-_public_ const char *udev_device_get_devnode(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- if (udev_device->devnode != NULL)
- return udev_device->devnode;
- if (!udev_device->info_loaded)
- udev_device_read_uevent_file(udev_device);
- return udev_device->devnode;
-}
-
-/**
- * udev_device_get_devlinks_list_entry:
- * @udev_device: udev device
- *
- * Retrieve the list of device links pointing to the device file of
- * the udev device. The next list entry can be retrieved with
- * udev_list_entry_next(), which returns #NULL if no more entries exist.
- * The devlink path can be retrieved from the list entry by
- * udev_list_entry_get_name(). The path is an absolute path, and starts with
- * the device directory.
- *
- * Returns: the first entry of the device node link list
- **/
-_public_ struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- if (!udev_device->info_loaded)
- udev_device_read_db(udev_device, NULL);
- return udev_list_get_entry(&udev_device->devlinks_list);
-}
-
-void udev_device_cleanup_devlinks_list(struct udev_device *udev_device)
-{
- udev_device->devlinks_uptodate = false;
- udev_list_cleanup(&udev_device->devlinks_list);
-}
-
-/**
- * udev_device_get_properties_list_entry:
- * @udev_device: udev device
- *
- * Retrieve the list of key/value device properties of the udev
- * device. The next list entry can be retrieved with udev_list_entry_next(),
- * which returns #NULL if no more entries exist. The property name
- * can be retrieved from the list entry by udev_list_get_name(),
- * the property value by udev_list_get_value().
- *
- * Returns: the first entry of the property list
- **/
-_public_ struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- if (!udev_device->info_loaded) {
- udev_device_read_uevent_file(udev_device);
- udev_device_read_db(udev_device, NULL);
- }
- if (!udev_device->devlinks_uptodate) {
- char symlinks[UTIL_PATH_SIZE];
- struct udev_list_entry *list_entry;
-
- udev_device->devlinks_uptodate = true;
- list_entry = udev_device_get_devlinks_list_entry(udev_device);
- if (list_entry != NULL) {
- char *s;
- size_t l;
-
- s = symlinks;
- l = util_strpcpyl(&s, sizeof(symlinks), udev_list_entry_get_name(list_entry), NULL);
- udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry))
- l = util_strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry), NULL);
- udev_device_add_property(udev_device, "DEVLINKS", symlinks);
- }
- }
- if (!udev_device->tags_uptodate) {
- udev_device->tags_uptodate = true;
- if (udev_device_get_tags_list_entry(udev_device) != NULL) {
- char tags[UTIL_PATH_SIZE];
- struct udev_list_entry *list_entry;
- char *s;
- size_t l;
-
- s = tags;
- l = util_strpcpyl(&s, sizeof(tags), ":", NULL);
- udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device))
- l = util_strpcpyl(&s, l, udev_list_entry_get_name(list_entry), ":", NULL);
- udev_device_add_property(udev_device, "TAGS", tags);
- }
- }
- return udev_list_get_entry(&udev_device->properties_list);
-}
-
-/**
- * udev_device_get_action:
- * @udev_device: udev device
- *
- * This is only valid if the device was received through a monitor. Devices read from
- * sys do not have an action string. Usual actions are: add, remove, change, online,
- * offline.
- *
- * Returns: the kernel action value, or #NULL if there is no action value available.
- **/
-_public_ const char *udev_device_get_action(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- return udev_device->action;
-}
-
-/**
- * udev_device_get_usec_since_initialized:
- * @udev_device: udev device
- *
- * Return the number of microseconds passed since udev set up the
- * device for the first time.
- *
- * This is only implemented for devices with need to store properties
- * in the udev database. All other devices return 0 here.
- *
- * Returns: the number of microseconds since the device was first seen.
- **/
-_public_ unsigned long long int udev_device_get_usec_since_initialized(struct udev_device *udev_device)
-{
- unsigned long long now;
-
- if (udev_device == NULL)
- return 0;
- if (!udev_device->info_loaded)
- udev_device_read_db(udev_device, NULL);
- if (udev_device->usec_initialized == 0)
- return 0;
- now = now_usec();
- if (now == 0)
- return 0;
- return now - udev_device->usec_initialized;
-}
-
-unsigned long long udev_device_get_usec_initialized(struct udev_device *udev_device)
-{
- return udev_device->usec_initialized;
-}
-
-void udev_device_set_usec_initialized(struct udev_device *udev_device, unsigned long long usec_initialized)
-{
- char num[32];
-
- udev_device->usec_initialized = usec_initialized;
- snprintf(num, sizeof(num), "%llu", usec_initialized);
- udev_device_add_property(udev_device, "USEC_INITIALIZED", num);
-}
-
-/**
- * udev_device_get_sysattr_value:
- * @udev_device: udev device
- * @sysattr: attribute name
- *
- * The retrieved value is cached in the device. Repeated calls will return the same
- * value and not open the attribute again.
- *
- * Returns: the content of a sys attribute file, or #NULL if there is no sys attribute value.
- **/
-_public_ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr)
-{
- struct udev_list_entry *list_entry;
- char path[UTIL_PATH_SIZE];
- char value[4096];
- struct stat statbuf;
- int fd;
- ssize_t size;
- const char *val = NULL;
-
- if (udev_device == NULL)
- return NULL;
- if (sysattr == NULL)
- return NULL;
-
- /* look for possibly already cached result */
- list_entry = udev_list_get_entry(&udev_device->sysattr_value_list);
- list_entry = udev_list_entry_get_by_name(list_entry, sysattr);
- if (list_entry != NULL)
- return udev_list_entry_get_value(list_entry);
-
- util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", sysattr, NULL);
- if (lstat(path, &statbuf) != 0) {
- udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, NULL);
- goto out;
- }
-
- if (S_ISLNK(statbuf.st_mode)) {
- struct udev_device *dev;
-
- /*
- * Some core links return only the last element of the target path,
- * these are just values, the paths should not be exposed.
- */
- if (strcmp(sysattr, "driver") == 0 ||
- strcmp(sysattr, "subsystem") == 0 ||
- strcmp(sysattr, "module") == 0) {
- if (util_get_sys_core_link_value(udev_device->udev, sysattr,
- udev_device->syspath, value, sizeof(value)) < 0)
- return NULL;
- list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, value);
- val = udev_list_entry_get_value(list_entry);
- goto out;
- }
-
- /* resolve link to a device and return its syspath */
- util_strscpyl(path, sizeof(path), udev_device->syspath, "/", sysattr, NULL);
- dev = udev_device_new_from_syspath(udev_device->udev, path);
- if (dev != NULL) {
- list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr,
- udev_device_get_syspath(dev));
- val = udev_list_entry_get_value(list_entry);
- udev_device_unref(dev);
- }
-
- goto out;
- }
-
- /* skip directories */
- if (S_ISDIR(statbuf.st_mode))
- goto out;
-
- /* skip non-readable files */
- if ((statbuf.st_mode & S_IRUSR) == 0)
- goto out;
-
- /* read attribute value */
- fd = open(path, O_RDONLY|O_CLOEXEC);
- if (fd < 0)
- goto out;
- size = read(fd, value, sizeof(value));
- close(fd);
- if (size < 0)
- goto out;
- if (size == sizeof(value))
- goto out;
-
- /* got a valid value, store it in cache and return it */
- value[size] = '\0';
- util_remove_trailing_chars(value, '\n');
- list_entry = udev_list_entry_add(&udev_device->sysattr_value_list, sysattr, value);
- val = udev_list_entry_get_value(list_entry);
-out:
- return val;
-}
-
-static int udev_device_sysattr_list_read(struct udev_device *udev_device)
-{
- struct dirent *dent;
- DIR *dir;
- int num = 0;
-
- if (udev_device == NULL)
- return -1;
- if (udev_device->sysattr_list_read)
- return 0;
-
- dir = opendir(udev_device_get_syspath(udev_device));
- if (!dir)
- return -1;
-
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- char path[UTIL_PATH_SIZE];
- struct stat statbuf;
-
- /* only handle symlinks and regular files */
- if (dent->d_type != DT_LNK && dent->d_type != DT_REG)
- continue;
-
- util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", dent->d_name, NULL);
- if (lstat(path, &statbuf) != 0)
- continue;
- if ((statbuf.st_mode & S_IRUSR) == 0)
- continue;
-
- udev_list_entry_add(&udev_device->sysattr_list, dent->d_name, NULL);
- num++;
- }
-
- closedir(dir);
- udev_device->sysattr_list_read = true;
-
- return num;
-}
-
-/**
- * udev_device_get_sysattr_list_entry:
- * @udev_device: udev device
- *
- * Retrieve the list of available sysattrs, with value being empty;
- * This just return all available sysfs attributes for a particular
- * device without reading their values.
- *
- * Returns: the first entry of the property list
- **/
-_public_ struct udev_list_entry *udev_device_get_sysattr_list_entry(struct udev_device *udev_device)
-{
- if (!udev_device->sysattr_list_read) {
- int ret;
- ret = udev_device_sysattr_list_read(udev_device);
- if (0 > ret)
- return NULL;
- }
-
- return udev_list_get_entry(&udev_device->sysattr_list);
-}
-
-int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath)
-{
- const char *pos;
- size_t len;
-
- free(udev_device->syspath);
- udev_device->syspath = strdup(syspath);
- if (udev_device->syspath == NULL)
- return -ENOMEM;
- udev_device->devpath = &udev_device->syspath[strlen(udev_get_sys_path(udev_device->udev))];
- udev_device_add_property(udev_device, "DEVPATH", udev_device->devpath);
-
- pos = strrchr(udev_device->syspath, '/');
- if (pos == NULL)
- return -EINVAL;
- udev_device->sysname = strdup(&pos[1]);
- if (udev_device->sysname == NULL)
- return -ENOMEM;
-
- /* some devices have '!' in their name, change that to '/' */
- len = 0;
- while (udev_device->sysname[len] != '\0') {
- if (udev_device->sysname[len] == '!')
- udev_device->sysname[len] = '/';
- len++;
- }
-
- /* trailing number */
- while (len > 0 && isdigit(udev_device->sysname[--len]))
- udev_device->sysnum = &udev_device->sysname[len];
-
- /* sysname is completely numeric */
- if (len == 0)
- udev_device->sysnum = NULL;
-
- return 0;
-}
-
-int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode)
-{
- free(udev_device->devnode);
- if (devnode[0] != '/') {
- if (asprintf(&udev_device->devnode, "%s/%s", udev_get_dev_path(udev_device->udev), devnode) < 0)
- udev_device->devnode = NULL;
- } else {
- udev_device->devnode = strdup(devnode);
- }
- if (udev_device->devnode == NULL)
- return -ENOMEM;
- udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode);
- return 0;
-}
-
-int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink, int unique)
-{
- struct udev_list_entry *list_entry;
-
- udev_device->devlinks_uptodate = false;
- list_entry = udev_list_entry_add(&udev_device->devlinks_list, devlink, NULL);
- if (list_entry == NULL)
- return -ENOMEM;
- if (unique)
- udev_list_entry_set_num(list_entry, true);
- return 0;
-}
-
-const char *udev_device_get_id_filename(struct udev_device *udev_device)
-{
- if (udev_device->id_filename == NULL) {
- if (udev_device_get_subsystem(udev_device) == NULL)
- return NULL;
-
- if (major(udev_device_get_devnum(udev_device)) > 0) {
- /* use dev_t -- b259:131072, c254:0 */
- if (asprintf(&udev_device->id_filename, "%c%u:%u",
- strcmp(udev_device_get_subsystem(udev_device), "block") == 0 ? 'b' : 'c',
- major(udev_device_get_devnum(udev_device)),
- minor(udev_device_get_devnum(udev_device))) < 0)
- udev_device->id_filename = NULL;
- } else if (udev_device_get_ifindex(udev_device) > 0) {
- /* use netdev ifindex -- n3 */
- if (asprintf(&udev_device->id_filename, "n%u", udev_device_get_ifindex(udev_device)) < 0)
- udev_device->id_filename = NULL;
- } else {
- /*
- * use $subsys:$syname -- pci:0000:00:1f.2
- * sysname() has '!' translated, get it from devpath
- */
- const char *sysname;
- sysname = strrchr(udev_device->devpath, '/');
- if (sysname == NULL)
- return NULL;
- sysname = &sysname[1];
- if (asprintf(&udev_device->id_filename, "+%s:%s", udev_device_get_subsystem(udev_device), sysname) < 0)
- udev_device->id_filename = NULL;
- }
- }
- return udev_device->id_filename;
-}
-
-/**
- * udev_device_get_is_initialized:
- * @udev_device: udev device
- *
- * Check if udev has already handled the device and has set up
- * device node permissions and context, or has renamed a network
- * device.
- *
- * This is only implemented for devices with a device node
- * or network interfaces. All other devices return 1 here.
- *
- * Returns: 1 if the device is set up. 0 otherwise.
- **/
-_public_ int udev_device_get_is_initialized(struct udev_device *udev_device)
-{
- if (!udev_device->info_loaded)
- udev_device_read_db(udev_device, NULL);
- return udev_device->is_initialized;
-}
-
-void udev_device_set_is_initialized(struct udev_device *udev_device)
-{
- udev_device->is_initialized = true;
-}
-
-int udev_device_add_tag(struct udev_device *udev_device, const char *tag)
-{
- if (strchr(tag, ':') != NULL || strchr(tag, ' ') != NULL)
- return -EINVAL;
- udev_device->tags_uptodate = false;
- if (udev_list_entry_add(&udev_device->tags_list, tag, NULL) != NULL)
- return 0;
- return -ENOMEM;
-}
-
-void udev_device_cleanup_tags_list(struct udev_device *udev_device)
-{
- udev_device->tags_uptodate = false;
- udev_list_cleanup(&udev_device->tags_list);
-}
-
-/**
- * udev_device_get_tags_list_entry:
- * @udev_device: udev device
- *
- * Retrieve the list of tags attached to the udev device. The next
- * list entry can be retrieved with udev_list_entry_next(),
- * which returns #NULL if no more entries exist. The tag string
- * can be retrieved from the list entry by udev_list_get_name().
- *
- * Returns: the first entry of the tag list
- **/
-_public_ struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_device *udev_device)
-{
- if (udev_device == NULL)
- return NULL;
- if (!udev_device->info_loaded)
- udev_device_read_db(udev_device, NULL);
- return udev_list_get_entry(&udev_device->tags_list);
-}
-
-_public_ int udev_device_has_tag(struct udev_device *udev_device, const char *tag)
-{
- struct udev_list_entry *list_entry;
-
- if (udev_device == NULL)
- return false;
- if (!udev_device->info_loaded)
- udev_device_read_db(udev_device, NULL);
- list_entry = udev_device_get_tags_list_entry(udev_device);
- if (udev_list_entry_get_by_name(list_entry, tag) != NULL)
- return true;
- return false;
-}
-
-#define ENVP_SIZE 128
-#define MONITOR_BUF_SIZE 4096
-static int update_envp_monitor_buf(struct udev_device *udev_device)
-{
- struct udev_list_entry *list_entry;
- char *s;
- size_t l;
- unsigned int i;
-
- /* monitor buffer of property strings */
- free(udev_device->monitor_buf);
- udev_device->monitor_buf_len = 0;
- udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE);
- if (udev_device->monitor_buf == NULL)
- return -ENOMEM;
-
- /* envp array, strings will point into monitor buffer */
- if (udev_device->envp == NULL)
- udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE);
- if (udev_device->envp == NULL)
- return -ENOMEM;
-
- i = 0;
- s = udev_device->monitor_buf;
- l = MONITOR_BUF_SIZE;
- udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
- const char *key;
-
- key = udev_list_entry_get_name(list_entry);
- /* skip private variables */
- if (key[0] == '.')
- continue;
-
- /* add string to envp array */
- udev_device->envp[i++] = s;
- if (i+1 >= ENVP_SIZE)
- return -EINVAL;
-
- /* add property string to monitor buffer */
- l = util_strpcpyl(&s, l, key, "=", udev_list_entry_get_value(list_entry), NULL);
- if (l == 0)
- return -EINVAL;
- /* advance past the trailing '\0' that util_strpcpyl() guarantees */
- s++;
- l--;
- }
- udev_device->envp[i] = NULL;
- udev_device->monitor_buf_len = s - udev_device->monitor_buf;
- udev_device->envp_uptodate = true;
- return 0;
-}
-
-char **udev_device_get_properties_envp(struct udev_device *udev_device)
-{
- if (!udev_device->envp_uptodate)
- if (update_envp_monitor_buf(udev_device) != 0)
- return NULL;
- return udev_device->envp;
-}
-
-ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf)
-{
- if (!udev_device->envp_uptodate)
- if (update_envp_monitor_buf(udev_device) != 0)
- return -EINVAL;
- *buf = udev_device->monitor_buf;
- return udev_device->monitor_buf_len;
-}
-
-int udev_device_set_action(struct udev_device *udev_device, const char *action)
-{
- free(udev_device->action);
- udev_device->action = strdup(action);
- if (udev_device->action == NULL)
- return -ENOMEM;
- udev_device_add_property(udev_device, "ACTION", udev_device->action);
- return 0;
-}
-
-int udev_device_get_devlink_priority(struct udev_device *udev_device)
-{
- if (!udev_device->info_loaded)
- udev_device_read_db(udev_device, NULL);
- return udev_device->devlink_priority;
-}
-
-int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio)
-{
- udev_device->devlink_priority = prio;
- return 0;
-}
-
-int udev_device_get_watch_handle(struct udev_device *udev_device)
-{
- if (!udev_device->info_loaded)
- udev_device_read_db(udev_device, NULL);
- return udev_device->watch_handle;
-}
-
-int udev_device_set_watch_handle(struct udev_device *udev_device, int handle)
-{
- udev_device->watch_handle = handle;
- return 0;
-}
-
-bool udev_device_get_db_persist(struct udev_device *udev_device)
-{
- return udev_device->db_persist;
-}
-
-void udev_device_set_db_persist(struct udev_device *udev_device)
-{
- udev_device->db_persist = true;
-}
~ianmdlvl / elogind.git / blobdiff