libudev: split source files
This commit is contained in:
Kay Sievers
parent
33a5cc2976
commit
eb1f0e6615
|
|
@ -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 \
|
||||
|
|
|
|||
256
udev/lib/libudev-device.c
Normal file
256
udev/lib/libudev-device.c
Normal file
|
|
@ -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;
|
||||
}
|
||||
190
udev/lib/libudev-enumerate.c
Normal file
190
udev/lib/libudev-enumerate.c
Normal file
|
|
@ -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;
|
||||
}
|
||||
|
|
@ -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
|
||||
|
|
|
|||
53
udev/lib/libudev-utils.c
Normal file
53
udev/lib/libudev-utils.c
Normal file
|
|
@ -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);
|
||||
}
|
||||
|
|
@ -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;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue