1 files changed, 256 insertions, 0 deletions
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;
+}