72 lines
1.9 KiB
Plaintext
72 lines
1.9 KiB
Plaintext
//po4a: entry man manual
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// mcookie.1 --
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// Public Domain 1995 Rickard E. Faith (faith@cs.unc.edu)
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= mcookie(1)
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:doctype: manpage
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:man manual: User Commands
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:man source: util-linux {release-version}
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:page-layout: base
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:command: mcookie
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== NAME
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mcookie - generate magic cookies for xauth
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== SYNOPSIS
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*mcookie* [options]
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== DESCRIPTION
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*mcookie* generates a 128-bit random hexadecimal number for use with the X authority system. Typical usage:
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____
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*xauth add :0 . `mcookie`*
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____
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The "random" number generated is actually the MD5 message digest of random information coming from one of the sources *getrandom*(2) system call, _/dev/urandom_, _/dev/random_, or the _libc pseudo-random functions_, in this preference order. See also the option *--file*.
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== OPTIONS
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*-f*, *--file* _file_::
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Use this _file_ as an additional source of randomness (for example _/dev/urandom_). When _file_ is '-', characters are read from standard input.
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*-m*, *--max-size* _number_::
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Read from _file_ only this _number_ of bytes. This option is meant to be used when reading additional randomness from a file or device.
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+
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The _number_ argument may be followed by the multiplicative suffixes KiB=1024, MiB=1024*1024, and so on for GiB, TiB, PiB, EiB, ZiB and YiB (the "iB" is optional, e.g., "K" has the same meaning as "KiB") or the suffixes KB=1000, MB=1000*1000, and so on for GB, TB, PB, EB, ZB and YB.
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*-v*, *--verbose*::
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Inform where randomness originated, with amount of entropy read from each source.
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*-V*, *--version*::
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Display version information and exit.
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*-h*, *--help*::
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Display help text and exit.
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== FILES
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_/dev/urandom_
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_/dev/random_
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== BUGS
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It is assumed that none of the randomness sources will block.
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== SEE ALSO
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*md5sum*(1),
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*X*(7),
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*xauth*(1),
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*rand*(3)
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include::man-common/bugreports.adoc[]
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include::man-common/footer.adoc[]
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ifdef::translation[]
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include::man-common/translation.adoc[]
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endif::[]
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