random(3)                  Library Functions Manual                  random(3)

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       random, srandom, initstate, setstate - <?><?><?><?><?><?><?><?><?>
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       <?><?><?><?><?> C (libc, -lc)

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       #include <stdlib.h>

       long random(void);
       void srandom(unsigned int seed);

       char *initstate(unsigned int seed, char state[.n], size_t n);
       char *setstate(char *state);

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   <?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?> <?><?><?> glibc
   (<?><?>. feature_test_macros(7)):

       random(), srandom(), initstate(), setstate():
           _XOPEN_SOURCE >= 500
               || /* glibc >= 2.19: */ _DEFAULT_SOURCE
               || /* glibc <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE

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       The random()  function uses a nonlinear additive feedback random number
       generator employing a default table of size 31 long integers to return
       successive pseudo-random numbers in the range from 0 to 2^31 - 1.  The
       period of this random number generator is very large, approximately
       16 * ((2^31) - 1).

       <?><?><?><?><?><?><?> srandom() <?><?><?><?><?><?><?><?><?><?><?><?><?>
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       <?><?><?><?><?><?><?>, <?><?> <?><?><?><?><?><?><?> random()
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       The initstate()  function allows a state array state to be initialized
       for use by random().  The size of the state array n is used by
       initstate()  to decide how sophisticated a random number generator it
       should use--the larger the state array, the better the random numbers
       will be.  Current "optimal" values for the size of the state array n
       are 8, 32, 64, 128, and 256 bytes; other amounts will be rounded down
       to the nearest known amount.  Using less than 8 bytes results in an
       error.  seed is the seed for the initialization, which specifies a
       starting point for the random number sequence, and provides for
       restarting at the same point.

       <?><?><?><?><?><?><?> setstate() <?><?><?><?><?><?><?><?>
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       <?> random(). <?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?> state
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       <?><?> <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?> initstate()
       <?><?><?> setstate(). <?><?><?><?><?><?><?><?> state <?><?><?><?><?><?>
       <?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?> <?>
       <?><?><?><?><?><?><?> <?><?><?><?><?><?><?> initstate() <?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?> setstate().

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       The random()  function returns a value between 0 and (2^31) - 1.  The
       srandom()  function returns no value.

       The initstate()  function returns a pointer to the previous state
       array.  On failure, it returns NULL, and errno is set to indicate the
       error.

       On success, setstate()  returns a pointer to the previous state array.
       On failure, it returns NULL, and errno is set to indicate the error.

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       EINVAL <?><?><?><?><?><?><?><?> state, <?><?><?><?><?><?><?><?><?>
              setstate(), <?><?><?><?><?> NULL.

       EINVAL <?><?><?><?><?><?><?> initstate() <?><?><?><?><?><?><?>
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       +----------------------------+----------------------------------------------------------+--------------------------+
       |<?><?><?><?><?><?><?><?><?> | <?><?><?><?><?><?><?>                                    | <?><?><?><?><?><?><?><?> |
       +----------------------------+----------------------------------------------------------+--------------------------+
       |random(), srandom(),        | <?><?><?><?><?><?><?><?><?><?><?><?> <?> <?><?><?><?><?> | MT-Safe                  |
       |initstate(), setstate()     |                                                          |                          |
       +----------------------------+----------------------------------------------------------+--------------------------+
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       POSIX.1-2008.

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       POSIX.1-2001, 4.3BSD.

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       <?><?><?><?><?><?><?><?><?>. <?> <?><?><?><?><?> 7 (Random Numbers)
       Numerical Recipes in C: The Art of Scientific Computing (William H.
       Press, Brian P. Flannery, Saul A. Teukolsky, William T. Vetterling; New
       York: Cambridge University Press, 2007, 3rd ed.)
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       <?><?><?><?><?><?><?><?><?><?><?><?> <?> <?><?><?><?><?> 3 (Random
       Numbers) <?><?><?><?><?><?><?> <?><?><?><?> <?><?><?><?><?><?><?><?><?>
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       <?><?><?><?><?><?><?><?> <?><?><?><?><?> (The Art of Computer
       Programming, volume 2 (Seminumerical Algorithms), 2nd ed.; Reading,
       Massachusetts: Addison-Wesley Publishing Company, 1981).

CAVEATS
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       getrandom(2), drand48(3), rand(3), random_r(3), srand(3)

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       <?><?><?><?><?><?><?><?><?><?>(<?>) aereiae <aereiae@gmail.com>, Azamat
       Hackimov <azamat.hackimov@gmail.com>, Dmitriy S. Seregin
       <dseregin@59.ru>, Katrin Kutepova <blackkatelv@gmail.com>, Lockal
       <lockalsash@gmail.com>, Yuri Kozlov <yuray@komyakino.ru>,
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       <?><?><?><?><?><?> <pavia00@gmail.com>

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       <https://www.gnu.org/licenses/gpl-3.0.html> <?><?><?><?><?><?> 3
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       <<debian-l10n-russian@lists.debian.org>>.

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                             2 <?><?><?> 2024 <?>.                   random(3)