systemd-stable/udev_rules.h

/*
 * udev_rules.h
 *
 * Userspace devfs
 *
 * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
 *
 *	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 version 2 of the License.
 * 
 *	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, write to the Free Software Foundation, Inc.,
 *	675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifndef UDEV_RULES_H
#define UDEV_RULES_H

#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
#include "list.h"

#define PAIRS_MAX		5
#define RULEFILE_SUFFIX		".rules"

enum key_operation {
	KEY_OP_UNSET,
	KEY_OP_MATCH,
	KEY_OP_NOMATCH,
	KEY_OP_ADD,
	KEY_OP_ASSIGN,
	KEY_OP_ASSIGN_FINAL,
};

struct key {
	enum key_operation operation;
	size_t val_off;
};

struct key_pair {
	struct key key;
	size_t key_name_off;
};

struct key_pairs {
	int count;
	struct key_pair keys[PAIRS_MAX];
};

enum import_type {
	IMPORT_UNSET,
	IMPORT_PROGRAM,
	IMPORT_FILE,
	IMPORT_PARENT,
};

struct udev_rule {
	struct key label;
	struct key goto_label;
	struct key kernel_name;
	struct key subsystem;
	struct key action;
	struct key devpath;
	struct key bus;
	struct key id;
	struct key driver;
	struct key program;
	struct key result;
	struct key modalias;
	struct key import;
	enum import_type import_type;
	struct key wait_for_sysfs;
	struct key_pairs sysfs;
	struct key_pairs env;

	struct key name;
	struct key symlink;
	struct key run;
	struct key owner;
	struct key group;
	enum key_operation mode_operation;
	mode_t mode;

	unsigned int partitions;
	unsigned int last_rule:1,
		     ignore_device:1,
		     ignore_remove:1;

	size_t bufsize;
	char buf[];
};

struct udev_rules {
	char *buf;
	size_t bufsize;
	size_t current;
	int mapped;
	int resolve_names;
};

extern int udev_rules_init(struct udev_rules *rules, int resolve_names);
extern void udev_rules_close(struct udev_rules *rules);

extern void udev_rules_iter_init(struct udev_rules *rules);
extern struct udev_rule *udev_rules_iter_next(struct udev_rules *rules);
extern struct udev_rule *udev_rules_iter_label(struct udev_rules *rules, const char *label);

extern int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct sysfs_class_device *class_dev);
extern int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev, struct sysfs_device *sysfs_device);

#endif