1 //po4a: entry man manual
3 // Public Domain 1995 Rickard E. Faith (faith@cs.unc.edu)
6 :man manual: User Commands
7 :man source: util-linux {release-version}
13 mcookie - generate magic cookies for xauth
21 *mcookie* generates a 128-bit random hexadecimal number for use with the X authority system. Typical usage:
24 *xauth add :0 . `mcookie`*
27 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*.
31 *-f*, *--file* _file_::
32 Use this _file_ as an additional source of randomness (for example _/dev/urandom_). When _file_ is '-', characters are read from standard input.
34 *-m*, *--max-size* _number_::
35 Read from _file_ only this _number_ of bytes. This option is meant to be used when reading additional randomness from a file or device.
37 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.
40 Inform where randomness originated, with amount of entropy read from each source.
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52 It is assumed that none of the randomness sources will block.
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