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+'\" t
+.\" Copyright 2003 Walter Harms, 2004 Andries Brouwer <aeb@cwi.nl>.
+.\"
+.\" SPDX-License-Identifier: Linux-man-pages-copyleft
+.\"
+.\" Created 2004-10-31. Text taken from a page by Walter Harms, 2003-09-08
+.\"
+.TH drand48_r 3 2023-07-20 "Linux man-pages 6.05.01"
+.SH NAME
+drand48_r, erand48_r, lrand48_r, nrand48_r, mrand48_r, jrand48_r,
+srand48_r, seed48_r, lcong48_r
+\- generate uniformly distributed pseudo-random numbers reentrantly
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
+.SH SYNOPSIS
+.nf
+.B #include <stdlib.h>
+.PP
+.BI "int drand48_r(struct drand48_data *restrict " buffer ,
+.BI "              double *restrict " result );
+.BI "int erand48_r(unsigned short " xsubi [3] ","
+.BI "              struct drand48_data *restrict "buffer ,
+.BI "              double *restrict " result ");"
+.PP
+.BI "int lrand48_r(struct drand48_data *restrict " buffer ,
+.BI "              long *restrict " result );
+.BI "int nrand48_r(unsigned short " xsubi[3] ","
+.BI "              struct drand48_data *restrict "buffer ,
+.BI "              long *restrict " result ");"
+.PP
+.BI "int mrand48_r(struct drand48_data *restrict " buffer ,
+.BI "              long *restrict " result ");"
+.BI "int jrand48_r(unsigned short " xsubi[3] ","
+.BI "              struct drand48_data *restrict " buffer ,
+.BI "              long *restrict " result ");"
+.PP
+.BI "int srand48_r(long int " seedval ", struct drand48_data *" buffer ");"
+.BI "int seed48_r(unsigned short " seed16v[3] ", struct drand48_data *" buffer );
+.BI "int lcong48_r(unsigned short " param[7] ", struct drand48_data *" buffer );
+.fi
+.PP
+.RS -4
+Feature Test Macro Requirements for glibc (see
+.BR feature_test_macros (7)):
+.RE
+.PP
+All functions shown above:
+.\" .BR drand48_r (),
+.\" .BR erand48_r (),
+.\" .BR lrand48_r (),
+.\" .BR nrand48_r (),
+.\" .BR mrand48_r (),
+.\" .BR jrand48_r (),
+.\" .BR srand48_r (),
+.\" .BR seed48_r (),
+.\" .BR lcong48_r ():
+.nf
+    /* glibc >= 2.19: */ _DEFAULT_SOURCE
+        || /* glibc <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE
+.fi
+.SH DESCRIPTION
+These functions are the reentrant analogs of the functions described in
+.BR drand48 (3).
+Instead of modifying the global random generator state, they use
+the supplied data
+.IR buffer .
+.PP
+Before the first use, this struct must be initialized, for example,
+by filling it with zeros, or by calling one of the functions
+.BR srand48_r (),
+.BR seed48_r (),
+or
+.BR lcong48_r ().
+.SH RETURN VALUE
+The return value is 0.
+.SH ATTRIBUTES
+For an explanation of the terms used in this section, see
+.BR attributes (7).
+.TS
+allbox;
+lbx lb lb
+l l l.
+Interface	Attribute	Value
+T{
+.na
+.nh
+.BR drand48_r (),
+.BR erand48_r (),
+.BR lrand48_r (),
+.BR nrand48_r (),
+.BR mrand48_r (),
+.BR jrand48_r (),
+.BR srand48_r (),
+.BR seed48_r (),
+.BR lcong48_r ()
+T}	Thread safety	MT-Safe race:buffer
+.TE
+.sp 1
+.SH STANDARDS
+GNU.
+.SH SEE ALSO
+.BR drand48 (3),
+.BR rand (3),
+.BR random (3)