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systemd-stable/namedev.h

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/*
* namedev.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 NAMEDEV_H
#define NAMEDEV_H
[PATCH] udevdb prototype Here's an "idea" of what I had in mind for udevdb. Let me preface the code with a few remarks: 1) I was expecting to write this udevdb for udev to keep track of devices. I was planning an external package that depends upon udev to provide an external API to the udevdb database. The calls for the interface would be read only access. Not sure how you want to do packaging, if having a separate package is ok or having it included in udev. 2) I created it as it is because udev isn't a daemon. So, the open database call doesn't take any parameters. My plan was to create a udevdb_init function that took arguments for initializing the db to start, where you could specify in memory only or a file location. This can all be filled in. 3) I hacked the Makefile to get it to work. Not sure how you'd want that in the future. 4) This assumes TDB has been installed elsewhere, you would need to edit your Makefile and point it to the header and library locations. How do you want to do TDB in udev? Do you want to just reference it and make udev dependent on that package being installed. Or should we do what samba does and include a limited tdb version in udev? 5) Again, I hacked udev into your existing code. In the future, I'd probably make a function around the filling out the udevice before calling the store command. Didn't know if you wanted to change your add device function to use struct udevice rather than having everything separate. 6) Not sure what we should include in the udevice structure that's stored by udev. I made a stab at a first shot - we can add and remove of course, this was a first pass. I've come to realize - with you including libsysfs in udev, the "external" interface that references udevdb could make use of getting information from through libsysfs from sysfs and doesn't need to be in udevdb. 7) I could write a namedevdb for namedev's device management if you wanted.
2003-08-06 10:57:23 +04:00
#include "udev.h"
#include "list.h"
struct sysfs_class_device;
#define BUS_SIZE 30
#define FILE_SIZE 50
#define VALUE_SIZE 100
#define ID_SIZE 50
#define PLACE_SIZE 50
#define PROGRAM_SIZE 100
#define FIELD_BUS "BUS"
#define FIELD_SYSFS "SYSFS"
#define FIELD_ID "ID"
#define FIELD_PLACE "PLACE"
#define FIELD_PROGRAM "PROGRAM"
#define FIELD_RESULT "RESULT"
#define FIELD_KERNEL "KERNEL"
#define FIELD_NAME "NAME"
#define FIELD_SYMLINK "SYMLINK"
#define ATTR_PARTITIONS "all_partitions"
#define PARTITIONS_COUNT 15
#define PROGRAM_MAXARG 10
#define MAX_SYSFS_PAIRS 5
#define RULEFILE_EXT ".rules"
#define PERMFILE_EXT ".permissions"
struct sysfs_pair {
char file[FILE_SIZE];
char value[VALUE_SIZE];
};
struct config_device {
struct list_head node;
char bus[BUS_SIZE];
char id[ID_SIZE];
char place[PLACE_SIZE];
[PATCH] udev - drop all methods :) > Hi, > as promised yesterday, here is a patch that drops the explicit methods > given in the udev config and implement only one type of rule. > > A rule now consists only of a number of keys to match. All known keys > are valid in any combination. The former configs should work with a few > changes: > > o the "<METHOD>, " at the beginning of the line should be removed > > o the result of the externel program is matched with RESULT= instead if ID= > the PROGRAM= key is only valid if the program exits with zero > (just exit with nozero in a script if the rule should not match) > > o rules are processed in order they appear in the file, no priority > > o if NAME="" is given, udev is instructed to ignore this device, > no node will be created > > > EXAMPLE: > > # combined BUS, SYSFS and KERNEL > BUS="usb", KERNEL="video*", SYSFS_model="Creative Labs WebCam*", NAME="test/webcam%n" > > # exec script only for the first ide drive (hda), all other will be skipped > BUS="ide", KERNEL="hda*", PROGRAM="/home/kay/src/udev.kay/extras/ide-devfs.sh %k %b %n", RESULT="hd*", NAME="%1c", SYMLINK="%2c %3c" > > > The udev-test.pl and test.block works fine here. > Please adapt your config and give it a try. > Here is a slightly better version of the patch. After a conversation with Patrick, we are now able to execute the PROGRAM and also match in all following rules with the RESULT value from this exec. EXAMPLE: We have 7 rules with RESULT and 2 with PROGRAM. Only the 5th rule matches with the callout result from the exec in the 4th rule. RULES: PROGRAM="/bin/echo abc", RESULT="no_match", NAME="web-no-2" KERNEL="video*", RESULT="123", NAME="web-no-3" KERNEL="video*", RESULT="123", NAME="web-no-4" PROGRAM="/bin/echo 123", RESULT="no_match", NAME="web-no-5" KERNEL="video*", RESULT="123", NAME="web-yes" RESULT: Jan 11 23:36:52 pim udev[26050]: namedev_name_device: process rule Jan 11 23:36:52 pim udev[26050]: namedev_name_device: check PROGRAM Jan 11 23:36:52 pim udev[26050]: execute_program: executing '/bin/echo abc' Jan 11 23:36:52 pim udev[26050]: execute_program: result is 'abc' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: PROGRAM returned successful Jan 11 23:36:52 pim udev[26050]: namedev_name_device: check for RESULT dev->result='no_match', udev->program_result='abc' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: RESULT is not matching Jan 11 23:36:52 pim udev[26050]: namedev_name_device: process rule Jan 11 23:36:52 pim udev[26050]: namedev_name_device: check for KERNEL dev->kernel='video*' class_dev->name='video0' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: KERNEL matches Jan 11 23:36:52 pim udev[26050]: namedev_name_device: check for RESULT dev->result='123', udev->program_result='abc' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: RESULT is not matching Jan 11 23:36:52 pim udev[26050]: namedev_name_device: process rule Jan 11 23:36:52 pim udev[26050]: namedev_name_device: check for KERNEL dev->kernel='video*' class_dev->name='video0' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: KERNEL matches Jan 11 23:36:52 pim udev[26050]: namedev_name_device: check for RESULT dev->result='123', udev->program_result='abc' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: RESULT is not matching Jan 11 23:36:52 pim udev[26050]: namedev_name_device: process rule Jan 11 23:36:52 pim udev[26050]: namedev_name_device: check PROGRAM Jan 11 23:36:52 pim udev[26050]: execute_program: executing '/bin/echo 123' Jan 11 23:36:52 pim udev[26050]: execute_program: result is '123' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: PROGRAM returned successful Jan 11 23:36:52 pim udev[26050]: namedev_name_device: check for RESULT dev->result='no_match', udev->program_result='123' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: RESULT is not matching Jan 11 23:36:52 pim udev[26050]: namedev_name_device: process rule Jan 11 23:36:52 pim udev[26050]: namedev_name_device: check for KERNEL dev->kernel='video*' class_dev->name='video0' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: KERNEL matches Jan 11 23:36:52 pim udev[26050]: namedev_name_device: check for RESULT dev->result='123', udev->program_result='123' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: RESULT matches Jan 11 23:36:52 pim udev[26050]: namedev_name_device: found matching rule, 'video*' becomes '' Jan 11 23:36:52 pim udev[26050]: namedev_name_device: name, 'web-yes' is going to have owner='', group='', mode = 0600
2004-01-13 08:39:05 +03:00
char kernel[NAME_SIZE];
char program[PROGRAM_SIZE];
char result[PROGRAM_SIZE];
char name[NAME_SIZE];
char symlink[NAME_SIZE];
struct sysfs_pair sysfs_pair[MAX_SYSFS_PAIRS];
int partitions;
char config_file[NAME_SIZE];
int config_line;
};
struct perm_device {
struct list_head node;
char name[NAME_SIZE];
char owner[OWNER_SIZE];
char group[GROUP_SIZE];
unsigned int mode;
};
extern struct list_head config_device_list;
extern struct list_head perm_device_list;
extern int namedev_init(void);
extern int namedev_name_device(struct sysfs_class_device *class_dev, struct udevice *dev);
extern int namedev_init_permissions(void);
extern int namedev_init_rules(void);
extern int add_perm_dev(struct perm_device *new_dev);
extern void dump_config_dev(struct config_device *dev);
extern void dump_config_dev_list(void);
extern void dump_perm_dev(struct perm_device *dev);
extern void dump_perm_dev_list(void);
#endif