rndctl(8) - NetBSD Manual Pages

RNDCTL(8)               NetBSD System Manager's Manual               RNDCTL(8)


NAME

     rndctl - in-kernel random number generator management tool


SYNOPSIS

     rndctl -CEce [-t devtype] [-d devname]
     rndctl -l [-t devtype] [-d devname]


DESCRIPTION

     The rndctl program manages which devices timing information is to be col-
     lected by, and alters the estimation of entropy of sources.


OPTIONS

     The following options are available:

     -C      Disable collection of timing information for the given device
             name or device type.

     -c      Enable collection of timing information for the given device name
             of device type.

     -E      Disable entropy estimation from the collected timing information
             for the given device name or device type.  The timing information
             is still collected and mixed into the internal entropy pool, but
             no entropy is assumed to be present.

     -e      Enable entropy estimation using the collected timing information
             for the given device name or device type.

     -l      List all sources, or only those specified by the devtype or
             devname specified.

     -t      All devices of type devtype are altered or displayed.

     -d      Only the device named devname is altered or displayed.


WARNINGS

     Turning on entropy collection from unsafe sources can weaken system secu-
     rity.  Care should be taken when using this command.


HISTORY

     The rndctl program was first made available in NetBSD 1.3.


AUTHOR

     The rndctl program was written by Michael Graff <explorer@flame.org>.


SEE ALSO

     rnd(4), rnd(9)

NetBSD                         October 12, 1997                              1