Systemd/udev.h
arun@codemovers.org 3e4414508b [PATCH] udev - read long lines from config files overflow fix
Hi Kay,

On 23:12 Sat 04 Sep     , Kay Sievers wrote:
> Cool, a real bug :)
> Thanks, for the patch. I think it would be better to skip lenghth exceeding
> lines instead of cutting it and continue. While looking at it I restructured
> the buffer reading logic a bit and fixed another stupid bug.
Thanks for the cleanup.

You may have overlooked the fix for udev_config.c(parsing udev.conf) in
your patch.  So, I've adapted the fixes you applied to namedev_parse.c
to this file also.

Also, while 'eating' the whitespace the 'count' doesn't get decremented.
This leads strncpy to copy the number of whitespace minus 1 characters
from the next line. Minus 1 because it copies '\n' from the current
line.

		while (isspace(bufline[0])) {
			bufline++;
+			count--;
		}
		.
		.
		.
		strncpy(line, bufline, count);

Included patch(against udev-030) contains the above fixes as well as
your fixes.


Signed-off-by: Arun Bhanu <arun@codemovers.org>
2005-04-26 21:37:00 -07:00

93 lines
2.6 KiB
C

/*
* udev.h
*
* Userspace devfs
*
* Copyright (C) 2003 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_H_
#define _UDEV_H_
#include <sys/param.h>
#include "libsysfs/sysfs/libsysfs.h"
#define COMMENT_CHARACTER '#'
#define NAME_SIZE 256
#define OWNER_SIZE 30
#define GROUP_SIZE 30
#define MODE_SIZE 8
#define ACTION_SIZE 32
#define DEVPATH_SIZE 256
#define SUBSYSTEM_SIZE 32
#define SEQNUM_SIZE 32
#define LINE_SIZE 256
/* length of public data */
#define UDEVICE_LEN (offsetof(struct udevice, bus_id))
struct udevice {
char name[NAME_SIZE];
char owner[OWNER_SIZE];
char group[GROUP_SIZE];
char type;
int major;
int minor;
unsigned int mode; /* not mode_t due to conflicting definitions in different libcs */
char symlink[NAME_SIZE];
int partitions;
int config_line;
char config_file[NAME_SIZE];
long config_uptime;
/* private data that help us in building strings */
char bus_id[SYSFS_NAME_LEN];
char program_result[NAME_SIZE];
char kernel_number[NAME_SIZE];
char kernel_name[NAME_SIZE];
};
extern int udev_add_device(const char *path, const char *subsystem, int fake);
extern int udev_remove_device(const char *path, const char *subsystem);
extern void udev_init_config(void);
extern int udev_start(void);
extern int __udev_hotplug(char *action, const char *devpath,
const char *subsystem);
extern int parse_get_pair(char **orig_string, char **left, char **right);
extern void dev_d_send(struct udevice *dev, const char *subsystem,
const char *devpath);
extern char **main_argv;
extern char **main_envp;
extern char sysfs_path[SYSFS_PATH_MAX];
extern char udev_root[PATH_MAX];
extern char udev_db_filename[PATH_MAX+NAME_MAX];
extern char udev_permissions_filename[PATH_MAX+NAME_MAX];
extern char udev_config_filename[PATH_MAX+NAME_MAX];
extern char udev_rules_filename[PATH_MAX+NAME_MAX];
extern char default_mode_str[MODE_SIZE];
extern char default_owner_str[OWNER_SIZE];
extern char default_group_str[GROUP_SIZE];
extern int udev_log;
extern int udev_sleep;
extern int udev_dev_d;
#endif