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MCOOKIE(1) Linux Programmer's Manual MCOOKIE(1)
NAME
mcookie - generate magic cookies for xauth
SYNOPSIS
mcookie [-v] [-f filename ]
DESCRIPTION
mcookie generates a 128-bit random hexadecimal number for use with the X authority system.
Typical usage:
xauth add :0 . `mcookie`
The "random" number generated is actually the output of the MD5 message digest fed with
various piece of random information: the current time, the process id, the parent process
id, the contents of an input file (if -f is specified), and several bytes of information
from the first of the following devices which is present: /dev/random, /dev/urandom, files
in /proc, /dev/audio.
BUGS
The entropy in the generated 128-bit is probably quite small (and, therefore, vulnerable
to attack) unless a non-pseudorandom number generator is used (e.g., /dev/random under
Linux).
It is assumed that none of the devices opened will block.
FILES
/dev/random
/dev/urandom
/dev/audio
/proc/stat
/proc/loadavg
SEE ALSO
X(1), xauth(1), md5sum(1)
AVAILABILITY
The mcookie command is part of the util-linux-ng package and is available from
ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
25 September 1995 MCOOKIE(1)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-25 22:50 @38.107.179.236 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)