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Command: rand_r | Section: 3 | Source: MINIX | File: rand_r.3
RAND(3) FreeBSD Library Functions Manual RAND(3)
NAME
rand, srand, rand_r - bad random number generator
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
void
srand(unsigned int seed);
int
rand(void);
int
rand_r(unsigned int *seed);
DESCRIPTION
These interfaces are obsoleted by random(3).
The rand() function computes a sequence of pseudo-random integers in the
range of 0 to RAND_MAX (as defined by the header file <stdlib.h>).
The srand() function sets its argument as the seed for a new sequence of
pseudo-random numbers to be returned by rand(). These sequences are
repeatable by calling srand() with the same seed value.
If no seed value is provided, the rand() function is automatically seeded
with a value of 1.
The rand_r() function is a reentrant interface to rand(); the seed has to
be supplied and is maintained by the caller.
SEE ALSO
random(3), rnd(4)
STANDARDS
The rand() and srand() functions conform to ANSI X3.159-1989
("ANSI C89"). The rand_r() function conforms to IEEE Std 1003.1c-1995
("POSIX.1c").
FreeBSD 14.1-RELEASE-p8 June 4, 1993 FreeBSD 14.1-RELEASE-p8